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Windows Analysis Report
Base64.exe

Overview

General Information

Sample name:	Base64.exe
Analysis ID:	1579401
MD5:	1622226f04adfc7b0c1ceec4b0b4236f
SHA1:	b0c6852d56a507e82da9760789c6708f6f332290
SHA256:	7a1d47b6f3c6d03bf7da12a84360ec19edeca08292c3b60156f8063ee639f1aa
Tags:	CobaltStrikeexeuser-kafan_shengui
Infos:

Detection

CobaltStrike

Score:	68
Range:	0 - 100
Whitelisted:	false
Confidence:	100%

Signatures

Antivirus / Scanner detection for submitted sample

Multi AV Scanner detection for submitted file

Yara detected CobaltStrike

AI detected suspicious sample

AV process strings found (often used to terminate AV products)

Checks if the current process is being debugged

Contains functionality to check if a debugger is running (IsDebuggerPresent)

One or more processes crash

Uses Microsoft's Enhanced Cryptographic Provider

Classification

Process Tree

System is w10x64

Base64.exe (PID: 2228 cmdline: "C:\Users\user\Desktop\Base64.exe" MD5: 1622226F04ADFC7B0C1CEEC4B0B4236F)

conhost.exe (PID: 6508 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: 0D698AF330FD17BEE3BF90011D49251D)

WerFault.exe (PID: 1248 cmdline: C:\Windows\system32\WerFault.exe -u -p 2228 -s 192 MD5: FD27D9F6D02763BDE32511B5DF7FF7A0)

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
Cobalt Strike, CobaltStrike	Cobalt Strike is a paid penetration testing product that allows an attacker to deploy an agent named 'Beacon' on the victim machine. Beacon includes a wealth of functionality to the attacker, including, but not limited to command execution, key logging, file transfer, SOCKS proxying, privilege escalation, mimikatz, port scanning and lateral movement. Beacon is in-memory/file-less, in that it consists of stageless or multi-stage shellcode that once loaded by exploiting a vulnerability or executing a shellcode loader, will reflectively load itself into the memory of a process without touching the disk. It supports C2 and staging over HTTP, HTTPS, DNS, SMB named pipes as well as forward and reverse TCP; Beacons can be daisy-chained. Cobalt Strike comes with a toolkit for developing shellcode loaders, called Artifact Kit.The Beacon implant has become popular amongst targeted attackers and criminal users as it is well written, stable, and highly customizable.	APT 29 APT32 APT41 AQUATIC PANDA Anunak Cobalt Codoso CopyKittens DarkHydrus Earth Baxia FIN6 FIN7 Leviathan Mustang Panda Shell Crew Stone Panda TianWu UNC1878 UNC2452 Winnti Umbrella	http://blog.morphisec.com/new-global-attack-on-point-of-sale-systems http://blog.nsfocus.net/murenshark http://stillu.cc/assets/slides/2023-08-Unmasking%20CamoFei.pdf http://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/bluebottle-banks-targeted-africa http://www.secureworks.com/research/threat-profiles/gold-drake	https://malpedia.caad.fkie.fraunhofer.de/details/win.cobalt_strike

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
Base64.exe	JoeSecurity_CobaltStrike	Yara detected CobaltStrike	Joe Security

Memory Dumps

Source	Rule	Description	Author
00000000.00000002.2443301107.00000023D70FC000.00000004.00000010.00020000.00000000.sdmp	JoeSecurity_CobaltStrike	Yara detected CobaltStrike	Joe Security
00000000.00000002.2443544938.00007FF781852000.00000002.00000001.01000000.00000003.sdmp	JoeSecurity_CobaltStrike	Yara detected CobaltStrike	Joe Security
00000000.00000000.2029846522.00007FF781852000.00000002.00000001.01000000.00000003.sdmp	JoeSecurity_CobaltStrike	Yara detected CobaltStrike	Joe Security
Process Memory Space: Base64.exe PID: 2228	JoeSecurity_CobaltStrike	Yara detected CobaltStrike	Joe Security

Unpacked PEs

Source	Rule	Description	Author	Strings
0.0.Base64.exe.7ff781850000.0.unpack	JoeSecurity_CobaltStrike	Yara detected CobaltStrike	Joe Security
0.2.Base64.exe.7ff781850000.0.unpack	JoeSecurity_CobaltStrike	Yara detected CobaltStrike	Joe Security

Code function: 0_2_00007FF781851960 IsProcessorFeaturePresent,memset,RtlCaptureContext,RtlLookupFunctionEntry,RtlVirtualUnwind,memset,IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter,

0_2_00007FF781851960

Source: C:\Users\user\Desktop\Base64.exe	Code function: 0_2_00007FF781851960 IsProcessorFeaturePresent,memset,RtlCaptureContext,RtlLookupFunctionEntry,RtlVirtualUnwind,memset,IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter,	0_2_00007FF781851960
Source: C:\Users\user\Desktop\Base64.exe	Code function: 0_2_00007FF781851B08 SetUnhandledExceptionFilter,	0_2_00007FF781851B08
Source: C:\Users\user\Desktop\Base64.exe	Code function: 0_2_00007FF781851408 SetUnhandledExceptionFilter,UnhandledExceptionFilter,GetCurrentProcess,TerminateProcess,	0_2_00007FF781851408

Source: C:\Users\user\Desktop\Base64.exe

Code function: 0_2_00007FF781851838 GetSystemTimeAsFileTime,GetCurrentThreadId,GetCurrentProcessId,QueryPerformanceCounter,

0_2_00007FF781851838

Source: Amcache.hve.4.dr	Binary or memory string: c:\programdata\microsoft\windows defender\platform\4.18.23080.2006-0\msmpeng.exe
Source: Amcache.hve.4.dr	Binary or memory string: msmpeng.exe
Source: Amcache.hve.4.dr	Binary or memory string: c:\program files\windows defender\msmpeng.exe
Source: Amcache.hve.4.dr	Binary or memory string: MsMpEng.exe

Remote Access Functionality

Yara detected CobaltStrike

Source: Yara match	File source: Base64.exe, type: SAMPLE
Source: Yara match	File source: 0.0.Base64.exe.7ff781850000.0.unpack, type: UNPACKEDPE
Source: Yara match	File source: 0.2.Base64.exe.7ff781850000.0.unpack, type: UNPACKEDPE
Source: Yara match	File source: 00000000.00000002.2443301107.00000023D70FC000.00000004.00000010.00020000.00000000.sdmp, type: MEMORY
Source: Yara match	File source: 00000000.00000002.2443544938.00007FF781852000.00000002.00000001.01000000.00000003.sdmp, type: MEMORY
Source: Yara match	File source: 00000000.00000000.2029846522.00007FF781852000.00000002.00000001.01000000.00000003.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: Base64.exe PID: 2228, type: MEMORYSTR

Mitre Att&ck Matrix

Reconnaissance	Resource Development	Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Command and Control	Exfiltration	Impact
Gather Victim Identity Information	Acquire Infrastructure	Valid Accounts	Windows Management Instrumentation	1 DLL Side-Loading	1 Process Injection	1 Virtualization/Sandbox Evasion	OS Credential Dumping	1 System Time Discovery	Remote Services	Data from Local System	1 Encrypted Channel	Exfiltration Over Other Network Medium	Abuse Accessibility Features
Credentials	Domains	Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	1 DLL Side-Loading	1 Process Injection	LSASS Memory	31 Security Software Discovery	Remote Desktop Protocol	Data from Removable Media	Junk Data	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	Logon Script (Windows)	1 DLL Side-Loading	Security Account Manager	1 Virtualization/Sandbox Evasion	SMB/Windows Admin Shares	Data from Network Shared Drive	Steganography	Automated Exfiltration	Data Encrypted for Impact
Employee Names	Virtual Private Server	Local Accounts	Cron	Login Hook	Login Hook	Binary Padding	NTDS	2 System Information Discovery	Distributed Component Object Model	Input Capture	Protocol Impersonation	Traffic Duplication	Data Destruction

Behavior Graph

Hide Legend

Legend:

Process
Signature
Created File
DNS/IP Info
Is Dropped
Is Windows Process
Number of created Registry Values
Number of created Files
Visual Basic
Delphi
Java
.Net C# or VB.NET
C, C++ or other language
Is malicious
Internet

Source	Detection	Scanner	Label	Link
Base64.exe	17%	Virustotal		Browse
Base64.exe	13%	ReversingLabs
Base64.exe	100%	Avira	HEUR/AGEN.1317301

Name	Source	Malicious	Antivirus Detection	Reputation
http://upx.sf.net	Amcache.hve.4.dr	false		high

World Map of Contacted IPs

⊘No contacted IP infos

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1579401
Start date and time:	2024-12-22 05:29:07 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 3m 54s
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	default.jbs
Analysis system description:	Windows 10 x64 22H2 with Office Professional Plus 2019, Chrome 117, Firefox 118, Adobe Reader DC 23, Java 8 Update 381, 7zip 23.01
Number of analysed new started processes analysed:	9
Number of new started drivers analysed:	0
Number of existing processes analysed:	0
Number of existing drivers analysed:	0
Number of injected processes analysed:	0
Technologies:	HCA enabled EGA enabled AMSI enabled
Analysis Mode:	default
Analysis stop reason:	Timeout
Sample name:	Base64.exe
Detection:	MAL
Classification:	mal68.troj.winEXE@3/5@0/0
EGA Information:	Successful, ratio: 100%
HCA Information:	Successful, ratio: 100% Number of executed functions: 2 Number of non-executed functions: 1
Cookbook Comments:	Found application associated with file extension: .exe

Warnings

Exclude process from analysis (whitelisted): dllhost.exe, WerFault.exe, WMIADAP.exe, SIHClient.exe, svchost.exe
Excluded IPs from analysis (whitelisted): 20.189.173.20, 20.231.128.66, 4.175.87.197, 13.107.246.63
Excluded domains from analysis (whitelisted): ocsp.digicert.com, login.live.com, slscr.update.microsoft.com, otelrules.azureedge.net, blobcollector.events.data.trafficmanager.net, onedsblobprdwus15.westus.cloudapp.azure.com, ctldl.windowsupdate.com, umwatson.events.data.microsoft.com, fe3cr.delivery.mp.microsoft.com
Not all processes where analyzed, report is missing behavior information

Simulations

Behavior and APIs

Time	Type	Description
23:30:38	API Interceptor	1x Sleep call for process: WerFault.exe modified

C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_Base64.exe_499bb04f6bdfe31790fb9aa21d698a8ce2359192_99c0ef0c_e220a379-e700-4e94-b819-ac1f88aca209\Report.wer

Download File

Process:	C:\Windows\System32\WerFault.exe
File Type:	Unicode text, UTF-16, little-endian text, with CRLF line terminators
Category:	dropped
Size (bytes):	65536
Entropy (8bit):	0.6531036359334809
Encrypted:	false
SSDEEP:	96:B7FBsks6Qs6hgoW7JfuQXIDcQhc6UYcECAcw3a+HbHg/JgmZAX/d5FMT2SlPkpXz:9Y6Qw0vFUAfjJzuiFuZ24lO8rb
MD5:	37AE74000A1B85828B173C070E071B34
SHA1:	1D81F9DAB418E293F76622739315F30741FA0299
SHA-256:	5D69C658A5820648EF3F962F065B922DD7B6E9BDB99A0AADEF40A2873463B5DA
SHA-512:	AD974709C5D91BCE1794B20A568EF560E76F6CECAF180CDBB189162A5BBD2A929D8DB33595E43FC05B5DEBD364D024CC948EE8C647A9C2EE272064BCE3745126
Malicious:	true
Reputation:	low
Preview:	..V.e.r.s.i.o.n.=.1.....E.v.e.n.t.T.y.p.e.=.A.P.P.C.R.A.S.H.....E.v.e.n.t.T.i.m.e.=.1.3.3.7.9.3.1.5.3.9.7.5.4.4.2.4.9.5.....R.e.p.o.r.t.T.y.p.e.=.2.....C.o.n.s.e.n.t.=.1.....U.p.l.o.a.d.T.i.m.e.=.1.3.3.7.9.3.1.5.3.9.7.8.8.7.9.9.8.3.....R.e.p.o.r.t.S.t.a.t.u.s.=.5.2.4.3.8.4.....R.e.p.o.r.t.I.d.e.n.t.i.f.i.e.r.=.e.2.2.0.a.3.7.9.-.e.7.0.0.-.4.e.9.4.-.b.8.1.9.-.a.c.1.f.8.8.a.c.a.2.0.9.....I.n.t.e.g.r.a.t.o.r.R.e.p.o.r.t.I.d.e.n.t.i.f.i.e.r.=.5.f.7.7.d.3.b.2.-.5.8.3.e.-.4.0.1.f.-.a.8.6.5.-.3.f.b.7.e.1.8.8.8.d.f.6.....W.o.w.6.4.H.o.s.t.=.3.4.4.0.4.....N.s.A.p.p.N.a.m.e.=.B.a.s.e.6.4...e.x.e.....A.p.p.S.e.s.s.i.o.n.G.u.i.d.=.0.0.0.0.0.8.b.4.-.0.0.0.1.-.0.0.1.4.-.1.7.f.3.-.c.4.2.7.2.a.5.4.d.b.0.1.....T.a.r.g.e.t.A.p.p.I.d.=.W.:.0.0.0.6.b.e.2.b.9.b.d.2.d.0.3.1.7.d.b.a.2.6.e.3.2.e.b.2.8.0.2.d.7.2.f.7.0.0.0.0.f.f.f.f.!.0.0.0.0.b.0.c.6.8.5.2.d.5.6.a.5.0.7.e.8.2.d.a.9.7.6.0.7.8.9.c.6.7.0.8.f.6.f.3.3.2.2.9.0.!.B.a.s.e.6.4...e.x.e.....T.a.r.g.e.t.A.p.p.V.e.r.=.2.0.2.3././.1.1././.2.4.:.0.1.:.2.4.:.5.

C:\ProgramData\Microsoft\Windows\WER\Temp\WERBA9F.tmp.dmp

Download File

Process:	C:\Windows\System32\WerFault.exe
File Type:	Mini DuMP crash report, 14 streams, Sun Dec 22 04:29:57 2024, 0x1205a4 type
Category:	dropped
Size (bytes):	53886
Entropy (8bit):	1.4910655781852
Encrypted:	false
SSDEEP:	96:5v8HczW2TEP/4ki76NtjPcZ91qusrzcjAnUfimSM7rqkddcQPmnyhtv+kM3WIHNi:SHBYkOKt45sH3I7rqkjJekV9b/
MD5:	5D261A5243AD06B947A819C43EBF6C60
SHA1:	CF614DF9568AB47FFC68B9C624A2CBCDC0153AE5
SHA-256:	63086B549C682BC62624629BE0DEF325D997F1AB30890E61847B043236F0B711
SHA-512:	77CC0BA96B3591FA96AAEF3EEC7E4DC65C87BFF640FE2B259F568B9251C07C2443C6F54DD9369AB97FDF3C71DECDEA3D0CCE5E436B15B6DD4A628034F5FF42AF
Malicious:	false
Reputation:	low
Preview:	MDMP..a..... ........gg........................d...........$....!..........T.......8...........T...............v.......................................................................................................eJ..............Lw......................T............gg.............................0..............,...E.a.s.t.e.r.n. .S.t.a.n.d.a.r.d. .T.i.m.e...........................................E.a.s.t.e.r.n. .S.u.m.m.e.r. .T.i.m.e...............................................1.9.0.4.1...1...a.m.d.6.4.f.r.e...v.b._.r.e.l.e.a.s.e...1.9.1.2.0.6.-.1.4.0.6...................................................................................................................................................................................................................................................................................................................................................................................................................................................

C:\ProgramData\Microsoft\Windows\WER\Temp\WERBB1D.tmp.WERInternalMetadata.xml

Download File

Process:	C:\Windows\System32\WerFault.exe
File Type:	XML 1.0 document, Unicode text, UTF-16, little-endian text, with CRLF line terminators
Category:	dropped
Size (bytes):	8528
Entropy (8bit):	3.700565791001288
Encrypted:	false
SSDEEP:	192:R6l7wVeJMqML6YEIX5I+gmfoXpr089bw1Rf7wm:R6lXJBg6YEo5I+gmfobwzfJ
MD5:	0E23EA165800654FB813F54E4EA5825C
SHA1:	4CD9F76C91FBAA7CFAF6A178D34155CA2F76199B
SHA-256:	CF3F0D19D9D27847A3174E822B0709AB9E015FD265838E1942D3839063310EF3
SHA-512:	6700992A790EE4A034853C9CF5562BE4A38F2318959D0C9CD33C063ADA3714CC7458894F3781FEFF1BCCEE652894366D449C80CE3E9A0D4125BA0203B7E9C8D7
Malicious:	false
Reputation:	low
Preview:	..<.?.x.m.l. .v.e.r.s.i.o.n.=.".1...0.". .e.n.c.o.d.i.n.g.=.".U.T.F.-.1.6.".?.>.....<.W.E.R.R.e.p.o.r.t.M.e.t.a.d.a.t.a.>.......<.O.S.V.e.r.s.i.o.n.I.n.f.o.r.m.a.t.i.o.n.>.........<.W.i.n.d.o.w.s.N.T.V.e.r.s.i.o.n.>.1.0...0.<./.W.i.n.d.o.w.s.N.T.V.e.r.s.i.o.n.>.........<.B.u.i.l.d.>.1.9.0.4.5.<./.B.u.i.l.d.>.........<.P.r.o.d.u.c.t.>.(.0.x.3.0.).:. .W.i.n.d.o.w.s. .1.0. .P.r.o.<./.P.r.o.d.u.c.t.>.........<.E.d.i.t.i.o.n.>.P.r.o.f.e.s.s.i.o.n.a.l.<./.E.d.i.t.i.o.n.>.........<.B.u.i.l.d.S.t.r.i.n.g.>.1.9.0.4.1...2.0.0.6...a.m.d.6.4.f.r.e...v.b._.r.e.l.e.a.s.e...1.9.1.2.0.6.-.1.4.0.6.<./.B.u.i.l.d.S.t.r.i.n.g.>.........<.R.e.v.i.s.i.o.n.>.2.0.0.6.<./.R.e.v.i.s.i.o.n.>.........<.F.l.a.v.o.r.>.M.u.l.t.i.p.r.o.c.e.s.s.o.r. .F.r.e.e.<./.F.l.a.v.o.r.>.........<.A.r.c.h.i.t.e.c.t.u.r.e.>.X.6.4.<./.A.r.c.h.i.t.e.c.t.u.r.e.>.........<.L.C.I.D.>.2.0.5.7.<./.L.C.I.D.>.......<./.O.S.V.e.r.s.i.o.n.I.n.f.o.r.m.a.t.i.o.n.>.......<.P.r.o.c.e.s.s.I.n.f.o.r.m.a.t.i.o.n.>.........<.P.i.d.>.2.2.2.8.<./.P.i.

C:\ProgramData\Microsoft\Windows\WER\Temp\WERBB4C.tmp.xml

Download File

Process:	C:\Windows\System32\WerFault.exe
File Type:	XML 1.0 document, ASCII text, with CRLF line terminators
Category:	dropped
Size (bytes):	4657
Entropy (8bit):	4.481173351231124
Encrypted:	false
SSDEEP:	48:cvIwWl8zsDJg771I91dBOWpW8VYBYm8M4JxGSHFwpGyq85iGoSkEkx8W1ECpd:uIjfdI7+dBv7VtJxGnpGDGgE7W1jpd
MD5:	E343328FEF54D1728DC4FE30729F90A2
SHA1:	FAF3A235AB671AE883A05639F8C60D7D730159DB
SHA-256:	E4F6E8B51D790B66BF7647B78D86DEFFE4F253E1C507D048F8373ABCFFD84493
SHA-512:	3D5B876E89D46EA0509E768C1C6ED6EDD74B2A63E37EAE00AF8C342354442928C43FA8BF441892CB28C2E23512A8FFC62A44571CA56830B2687A46F6DD38C5EC
Malicious:	false
Reputation:	low
Preview:	<?xml version="1.0" encoding="UTF-8" standalone="yes"?>..<req ver="2">.. <tlm>.. <src>.. <desc>.. <mach>.. <os>.. <arg nm="vermaj" val="10" />.. <arg nm="vermin" val="0" />.. <arg nm="verbld" val="19045" />.. <arg nm="vercsdbld" val="2006" />.. <arg nm="verqfe" val="2006" />.. <arg nm="csdbld" val="2006" />.. <arg nm="versp" val="0" />.. <arg nm="arch" val="9" />.. <arg nm="lcid" val="2057" />.. <arg nm="geoid" val="223" />.. <arg nm="sku" val="48" />.. <arg nm="domain" val="0" />.. <arg nm="prodsuite" val="256" />.. <arg nm="ntprodtype" val="1" />.. <arg nm="platid" val="2" />.. <arg nm="tmsi" val="641972" />.. <arg nm="osinsty" val="1" />.. <arg nm="iever" val="11.789.19041.0-11.0.1000" />.. <arg nm="portos" val="0" />.. <arg nm="ram" val="409

C:\Windows\appcompat\Programs\Amcache.hve

Download File

Process:	C:\Windows\System32\WerFault.exe
File Type:	MS Windows registry file, NT/2000 or above
Category:	dropped
Size (bytes):	1835008
Entropy (8bit):	4.421617640652345
Encrypted:	false
SSDEEP:	6144:rSvfpi6ceLP/9skLmb0OTfWSPHaJG8nAgeMZMMhA2fX4WABlEnNg0uhiTw:WvloTfW+EZMM6DFyK03w
MD5:	283DA487E9E8A39593D12731635927AD
SHA1:	E101116FEBBE3D5DA2791A90A199C53165AB19CC
SHA-256:	40CA605A62117A1B34E09096ED39E3F6E1803E73DC411BAF23D6B4E3362A0EB1
SHA-512:	154C930B12FD6AC534E4EBEACF9A40AA7BD857AEF091D4FF955AA68DA7BF10654773D6A101D9AE228CB06D588644058B09EEEABC2E58F4C430B7A285EBB52C8D
Malicious:	false
Reputation:	low
Preview:	regf>...>....\.Z.................... ...........\.A.p.p.C.o.m.p.a.t.\.P.r.o.g.r.a.m.s.\.A.m.c.a.c.h.e...h.v.e....c...b...#.......c...b...#...........c...b...#......rmtmz..(*T...............................................................................................................................................................................................................................................................................................................................................i..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Static File Info

General

File type:	PE32+ executable (console) x86-64, for MS Windows
Entropy (8bit):	5.077287003077472
TrID:	Win64 Executable Console (202006/5) 92.65% Win64 Executable (generic) (12005/4) 5.51% Generic Win/DOS Executable (2004/3) 0.92% DOS Executable Generic (2002/1) 0.92% Autodesk FLIC Image File (extensions: flc, fli, cel) (7/3) 0.00%
File name:	Base64.exe
File size:	12'288 bytes
MD5:	1622226f04adfc7b0c1ceec4b0b4236f
SHA1:	b0c6852d56a507e82da9760789c6708f6f332290
SHA256:	7a1d47b6f3c6d03bf7da12a84360ec19edeca08292c3b60156f8063ee639f1aa
SHA512:	bba57da2a9d3cee009d5b71ae299458fd7e897bc38f2404dd76731ec413d4cfdbceed654fe042d85ba16696be8b326e29d52cfdf908837b66784dd20ab3f23b0
SSDEEP:	192:zf60gXWMU3Ba9chWAqCSRKJxMF8/HW4HsUW3Q5tfqXU/iU:F/3B8ckADxMFiHs31H
TLSH:	66423905BF9189EBD32D427EC87709DFE466B210839363CF936805261F96152335A3DE
File Content Preview:	MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$........L..j-o.j-o.j-o.cU..`-o.8En.h-o.8Ej.x-o.8Ek.`-o.8El.h-o..Kn.o-o.j-n.[-o..Df.k-o..D..k-o..Dm.k-o.Richj-o.........PE..d...f._e...

File Icon


Icon Hash:	00928e8e8686b000

Static PE Info

General

Entrypoint:	0x1400013f4
Entrypoint Section:	.text
Digitally signed:	false
Imagebase:	0x140000000
Subsystem:	windows cui
Image File Characteristics:	EXECUTABLE_IMAGE, LARGE_ADDRESS_AWARE
DLL Characteristics:	HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT, TERMINAL_SERVER_AWARE
Time Stamp:	0x655FFB66 [Fri Nov 24 01:24:54 2023 UTC]
TLS Callbacks:
CLR (.Net) Version:
OS Version Major:	6
OS Version Minor:	0
File Version Major:	6
File Version Minor:	0
Subsystem Version Major:	6
Subsystem Version Minor:	0
Import Hash:	c28ff7916aa0d92c2e2feac9b5188025

Entrypoint Preview

Instruction
dec eax
sub esp, 28h
call 00007F3DB04F6770h
dec eax
add esp, 28h
jmp 00007F3DB04F61A7h
int3
int3
inc eax
push ebx
dec eax
sub esp, 20h
dec eax
mov ebx, ecx
xor ecx, ecx
call dword ptr [00000C57h]
dec eax
mov ecx, ebx
call dword ptr [00000C56h]
call dword ptr [00000C40h]
dec eax
mov ecx, eax
mov edx, C0000409h
dec eax
add esp, 20h
pop ebx
dec eax
jmp dword ptr [00000C24h]
dec eax
mov dword ptr [esp+08h], ecx
dec eax
sub esp, 38h
mov ecx, 00000017h
call 00007F3DB04F6CCCh
test eax, eax
je 00007F3DB04F6339h
mov ecx, 00000002h
int 29h
dec eax
lea ecx, dword ptr [00002C7Fh]
call 00007F3DB04F63DFh
dec eax
mov eax, dword ptr [esp+38h]
dec eax
mov dword ptr [00002D66h], eax
dec eax
lea eax, dword ptr [esp+38h]
dec eax
add eax, 08h
dec eax
mov dword ptr [00002CF6h], eax
dec eax
mov eax, dword ptr [00002D4Fh]
dec eax
mov dword ptr [00002BC0h], eax
dec eax
mov eax, dword ptr [esp+40h]
dec eax
mov dword ptr [00002CC4h], eax
mov dword ptr [00002B9Ah], C0000409h
mov dword ptr [00002B94h], 00000001h
mov dword ptr [00002B9Eh], 00000001h
mov eax, 00000008h

Rich Headers

Programming Language:

[IMP] VS2008 SP1 build 30729

Data Directories

Name	Virtual Address	Virtual Size	Is in Section
IMAGE_DIRECTORY_ENTRY_EXPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IMPORT	0x2c2c	0xb4	.rdata
IMAGE_DIRECTORY_ENTRY_RESOURCE	0x6000	0x1e0	.rsrc
IMAGE_DIRECTORY_ENTRY_EXCEPTION	0x5000	0x174	.pdata
IMAGE_DIRECTORY_ENTRY_SECURITY	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BASERELOC	0x7000	0x1c	.reloc
IMAGE_DIRECTORY_ENTRY_DEBUG	0x26d0	0x70	.rdata
IMAGE_DIRECTORY_ENTRY_COPYRIGHT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_GLOBALPTR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_TLS	0x0	0x0
IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG	0x2740	0x100	.rdata
IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IAT	0x2000	0x1a0	.rdata
IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_RESERVED	0x0	0x0

Sections

Name	Virtual Address	Virtual Size	Raw Size	MD5	Xored PE	ZLIB Complexity	File Type	Entropy	Characteristics
.text	0x1000	0xeb8	0x1000	afc1161dda4e3dfbfada8a8b9a35b7ce	False	0.608154296875	data	5.745532697782869	IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
.rdata	0x2000	0x12ca	0x1400	f6c329a0cf124e351f605f5a5be2a823	False	0.4763671875	data	4.845112219170932	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
.data	0x4000	0x638	0x200	16ce509009a9e9bbb2099571d1c6e8ad	False	0.08984375	data	0.44440530617738494	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
.pdata	0x5000	0x174	0x200	86ae31cd5a8848f098f3c76f5784124c	False	0.44140625	data	2.904851083127445	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
.rsrc	0x6000	0x1e0	0x200	d223c232889289f7388583adeff234e1	False	0.525390625	data	4.697597008251789	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
.reloc	0x7000	0x1c	0x200	1eca56e00d4a85cd81e27fa78976b5db	False	0.083984375	data	0.4075837537346487	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ

Resources

Name	RVA	Size	Type	Language	Country	ZLIB Complexity
RT_MANIFEST	0x6060	0x17d	XML 1.0 document, ASCII text, with CRLF line terminators	English	United States	0.5931758530183727

Imports

DLL	Import
KERNEL32.dll	VirtualAlloc, VirtualFree, VirtualProtect, IsDebuggerPresent, InitializeSListHead, GetSystemTimeAsFileTime, GetCurrentThreadId, GetCurrentProcessId, QueryPerformanceCounter, IsProcessorFeaturePresent, TerminateProcess, GetCurrentProcess, SetUnhandledExceptionFilter, UnhandledExceptionFilter, RtlVirtualUnwind, RtlLookupFunctionEntry, RtlCaptureContext, GetModuleHandleW
CRYPT32.dll	CryptStringToBinaryA
VCRUNTIME140.dll	memset, __C_specific_handler
api-ms-win-crt-runtime-l1-1-0.dll	_crt_atexit, terminate, _register_thread_local_exe_atexit_callback, _c_exit, _register_onexit_function, _cexit, _exit, exit, _initterm_e, _initterm, _get_initial_narrow_environment, _initialize_narrow_environment, _configure_narrow_argv, __p___argc, _set_app_type, _seh_filter_exe, __p___argv, _initialize_onexit_table
api-ms-win-crt-math-l1-1-0.dll	__setusermatherr
api-ms-win-crt-stdio-l1-1-0.dll	_set_fmode, __p__commode
api-ms-win-crt-locale-l1-1-0.dll	_configthreadlocale
api-ms-win-crt-heap-l1-1-0.dll	_set_new_mode

Possible Origin

Language of compilation system	Country where language is spoken	Map
English	United States

Target ID:	0
Start time:	23:29:57
Start date:	21/12/2024
Path:	C:\Users\user\Desktop\Base64.exe
Wow64 process (32bit):	false
Commandline:	"C:\Users\user\Desktop\Base64.exe"
Imagebase:	0x7ff781850000
File size:	12'288 bytes
MD5 hash:	1622226F04ADFC7B0C1CEEC4B0B4236F
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Yara matches:	Rule: JoeSecurity_CobaltStrike, Description: Yara detected CobaltStrike, Source: 00000000.00000002.2443301107.00000023D70FC000.00000004.00000010.00020000.00000000.sdmp, Author: Joe Security Rule: JoeSecurity_CobaltStrike, Description: Yara detected CobaltStrike, Source: 00000000.00000002.2443544938.00007FF781852000.00000002.00000001.01000000.00000003.sdmp, Author: Joe Security Rule: JoeSecurity_CobaltStrike, Description: Yara detected CobaltStrike, Source: 00000000.00000000.2029846522.00007FF781852000.00000002.00000001.01000000.00000003.sdmp, Author: Joe Security
Reputation:	low
Has exited:	true

Show Windows behavior

Target ID:	1
Start time:	23:29:57
Start date:	21/12/2024
Path:	C:\Windows\System32\conhost.exe
Wow64 process (32bit):	false
Commandline:	C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Imagebase:	0x7ff6d64d0000
File size:	862'208 bytes
MD5 hash:	0D698AF330FD17BEE3BF90011D49251D
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	true

Show Windows behavior

Target ID:	4
Start time:	23:29:57
Start date:	21/12/2024
Path:	C:\Windows\System32\WerFault.exe
Wow64 process (32bit):	false
Commandline:	C:\Windows\system32\WerFault.exe -u -p 2228 -s 192
Imagebase:	0x7ff6f6020000
File size:	570'736 bytes
MD5 hash:	FD27D9F6D02763BDE32511B5DF7FF7A0
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	true

Show Windows behavior

Execution Graph

Execution Coverage:	23.6%
Dynamic/Decrypted Code Coverage:	0%
Signature Coverage:	27.9%
Total number of Nodes:	68
Total number of Limit Nodes:	1

Callgraph

Executed
Not Executed
Opacity -> Relevance
Disassembly available

Executed Functions

Function 00007FF781851000 Relevance: 10.6, APIs: 5, Strings: 1, Instructions: 81
memoryencryptionCOMMON

Download Yara Rule

Control-flow Graph

Executed
Not Executed

APIs

VirtualAlloc.KERNELBASE ref: 00007FF7818510B8
CryptStringToBinaryA.CRYPT32 ref: 00007FF7818510EE
VirtualProtect.KERNELBASE ref: 00007FF781851106
VirtualFree.KERNEL32 ref: 00007FF78185111B
VirtualFree.KERNEL32 ref: 00007FF781851135

Strings

b'/EiD5PDoyAAAAEFRQVBSUVZIMdJlSItSYEiLUhhIi1IgSItyUEgPt0pKTTHJSDHArDxhfAIsIEHByQ1BAcHi7VJBUUiLUiCLQjxIAdBmgXgYCwJ1couAiAAAAEiFwHRnSAHQUItIGESLQCBJAdDjVkj/yUGLNIhIAdZNMclIMcCsQcHJDUEBwTjgdfFMA0wkCEU50XXYWESLQCRJAdBmQYsMSESLQBxJAdBBiwSISAHQQVhBWF5ZWkFYQVlBWkiD7C, xrefs: 00007FF781851025

Memory Dump Source

Source File: 00000000.00000002.2443522928.00007FF781851000.00000020.00000001.01000000.00000003.sdmp, Offset: 00007FF781850000, based on PE: true

Associated: 00000000.00000002.2443502887.00007FF781850000.00000002.00000001.01000000.00000003.sdmpDownload File
Associated: 00000000.00000002.2443544938.00007FF781852000.00000002.00000001.01000000.00000003.sdmpDownload File
Associated: 00000000.00000002.2443571058.00007FF781855000.00000002.00000001.01000000.00000003.sdmpDownload File

Joe Sandbox IDA Plugin

Snapshot File: hcaresult_0_2_7ff781850000_Base64.jbxd

Yara matches

Similarity

API ID: Virtual$Free$AllocBinaryCryptProtectString
String ID: b'/EiD5PDoyAAAAEFRQVBSUVZIMdJlSItSYEiLUhhIi1IgSItyUEgPt0pKTTHJSDHArDxhfAIsIEHByQ1BAcHi7VJBUUiLUiCLQjxIAdBmgXgYCwJ1couAiAAAAEiFwHRnSAHQUItIGESLQCBJAdDjVkj/yUGLNIhIAdZNMclIMcCsQcHJDUEBwTjgdfFMA0wkCEU50XXYWESLQCRJAdBmQYsMSESLQBxJAdBBiwSISAHQQVhBWF5ZWkFYQVlBWkiD7C
API String ID: 3647951008-267588638
Opcode ID: 9e2463299bdb41e2d1994dd4e79f4d35062fc818be1d2a34cdef6188d01fc00c
Instruction ID: f52529a708eeea4993ecfa0560f9815bd047c1f99ec4e8eb38ff4d7ad4a7dad4
Opcode Fuzzy Hash: 9e2463299bdb41e2d1994dd4e79f4d35062fc818be1d2a34cdef6188d01fc00c
Instruction Fuzzy Hash: 41417F62F18B8582E710CB29E8153BDB361FB99B54F54A224DB8D53712EF78E2E4C700

Function 00007FF781851278 Relevance: 22.6, APIs: 15, Instructions: 94
COMMON

Download Yara Rule

Control-flow Graph

Executed
Not Executed

APIs

__scrt_initialize_crt.LIBCMT ref: 00007FF78185128C
__scrt_acquire_startup_lock.LIBCMT ref: 00007FF7818512A1
__scrt_release_startup_lock.LIBCMT ref: 00007FF78185130F
__scrt_is_nonwritable_in_current_image.LIBCMT ref: 00007FF781851325
__scrt_is_nonwritable_in_current_image.LIBCMT ref: 00007FF781851351
_register_thread_local_exe_atexit_callback.API-MS-WIN-CRT-RUNTIME-L1-1-0 ref: 00007FF78185135D
__p___argv.API-MS-WIN-CRT-RUNTIME-L1-1-0 ref: 00007FF781851362
__p___argc.API-MS-WIN-CRT-RUNTIME-L1-1-0 ref: 00007FF78185136A
_get_initial_narrow_environment.API-MS-WIN-CRT-RUNTIME-L1-1-0 ref: 00007FF781851372
__scrt_is_managed_app.LIBCMT ref: 00007FF781851386
_cexit.API-MS-WIN-CRT-RUNTIME-L1-1-0 ref: 00007FF781851394
__scrt_uninitialize_crt.LIBCMT ref: 00007FF78185139D
__scrt_fastfail.LIBCMT ref: 00007FF7818513D4
__scrt_fastfail.LIBCMT ref: 00007FF7818513DF
_exit.API-MS-WIN-CRT-RUNTIME-L1-1-0 ref: 00007FF7818513EE

Memory Dump Source

Source File: 00000000.00000002.2443522928.00007FF781851000.00000020.00000001.01000000.00000003.sdmp, Offset: 00007FF781850000, based on PE: true

Associated: 00000000.00000002.2443502887.00007FF781850000.00000002.00000001.01000000.00000003.sdmpDownload File
Associated: 00000000.00000002.2443544938.00007FF781852000.00000002.00000001.01000000.00000003.sdmpDownload File
Associated: 00000000.00000002.2443571058.00007FF781855000.00000002.00000001.01000000.00000003.sdmpDownload File

Joe Sandbox IDA Plugin

Snapshot File: hcaresult_0_2_7ff781850000_Base64.jbxd

Yara matches

Similarity

API ID: __scrt_fastfail__scrt_is_nonwritable_in_current_image$__p___argc__p___argv__scrt_acquire_startup_lock__scrt_initialize_crt__scrt_is_managed_app__scrt_release_startup_lock__scrt_uninitialize_crt_cexit_exit_get_initial_narrow_environment_register_thread_local_exe_atexit_callback
String ID:
API String ID: 1818695170-0
Opcode ID: ae335f83093c94fb68e732563092da6a35bc802c6c3ee060811f1cb31f958e84
Instruction ID: 5df445c4b186a4144d6259a358ecbf156371ca08aea1e7771bc0cba4a7bb4033
Opcode Fuzzy Hash: ae335f83093c94fb68e732563092da6a35bc802c6c3ee060811f1cb31f958e84
Instruction Fuzzy Hash: 56313A21A0C54282EB10BB6094733FAA291FF457A4FE44135E64EC76D7DEEDA824C770

Non-executed Functions

Function 00007FF781851B08 Relevance: .0, Instructions: 2COMMON

Download Yara Rule

Memory Dump Source

Source File: 00000000.00000002.2443522928.00007FF781851000.00000020.00000001.01000000.00000003.sdmp, Offset: 00007FF781850000, based on PE: true

Associated: 00000000.00000002.2443502887.00007FF781850000.00000002.00000001.01000000.00000003.sdmpDownload File
Associated: 00000000.00000002.2443544938.00007FF781852000.00000002.00000001.01000000.00000003.sdmpDownload File
Associated: 00000000.00000002.2443571058.00007FF781855000.00000002.00000001.01000000.00000003.sdmpDownload File

Joe Sandbox IDA Plugin

Snapshot File: hcaresult_0_2_7ff781850000_Base64.jbxd

Yara matches

Similarity

API ID:
String ID:
API String ID:
Opcode ID: 998d2646f2761270a67542b359778b175d27e11790de35eb66b11f52108b7811
Instruction ID: 0263353beaba3afde8138a685606947577939e49881cd641facd880837cf4acc
Opcode Fuzzy Hash: 998d2646f2761270a67542b359778b175d27e11790de35eb66b11f52108b7811
Instruction Fuzzy Hash: F0A00121A49802D0E704AB10A8625A5A222FB60360FA50171C00D81460EEBCA465C261

Source: Base64.exe	Virustotal: Detection: 16%			Perma Link
Source: Base64.exe	ReversingLabs: Detection: 13%

Source: C:\Windows\System32\WerFault.exe	Mutant created: \Sessions\1\BaseNamedObjects\Local\WERReportingForProcess2228
Source: C:\Windows\System32\conhost.exe	Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6508:120:WilError_03

Source: Base64.exe	Virustotal: Detection: 16%
Source: Base64.exe	ReversingLabs: Detection: 13%

Source: unknown	Process created: C:\Users\user\Desktop\Base64.exe "C:\Users\user\Desktop\Base64.exe"
Source: C:\Users\user\Desktop\Base64.exe	Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Users\user\Desktop\Base64.exe	Process created: C:\Windows\System32\WerFault.exe C:\Windows\system32\WerFault.exe -u -p 2228 -s 192

Source: C:\Users\user\Desktop\Base64.exe	Section loaded: apphelp.dll			Jump to behavior
Source: C:\Users\user\Desktop\Base64.exe	Section loaded: vcruntime140.dll			Jump to behavior

Source: Base64.exe	Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_IMPORT
Source: Base64.exe	Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_RESOURCE
Source: Base64.exe	Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_BASERELOC
Source: Base64.exe	Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG
Source: Base64.exe	Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG
Source: Base64.exe	Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_IAT

Source: Base64.exe	Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_IMPORT is in: .rdata
Source: Base64.exe	Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_RESOURCE is in: .rsrc
Source: Base64.exe	Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_BASERELOC is in: .reloc
Source: Base64.exe	Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG is in: .rdata
Source: Base64.exe	Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_IAT is in: .rdata

Source: C:\Windows\System32\WerFault.exe	Process information set: FAILCRITICALERRORS \| NOGPFAULTERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: FAILCRITICALERRORS \| NOGPFAULTERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: FAILCRITICALERRORS \| NOGPFAULTERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: FAILCRITICALERRORS \| NOGPFAULTERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: FAILCRITICALERRORS \| NOGPFAULTERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\WerFault.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior

Source: Amcache.hve.4.dr	Binary or memory string: VMware
Source: Amcache.hve.4.dr	Binary or memory string: VMware Virtual USB Mouse
Source: Amcache.hve.4.dr	Binary or memory string: vmci.syshbin
Source: Amcache.hve.4.dr	Binary or memory string: VMware, Inc.
Source: Amcache.hve.4.dr	Binary or memory string: VMware20,1hbin@
Source: Amcache.hve.4.dr	Binary or memory string: c:\windows\system32\driverstore\filerepository\vmci.inf_amd64_68ed49469341f563
Source: Amcache.hve.4.dr	Binary or memory string: Ascsi/cdrom&ven_necvmwar&prod_vmware_sata_cd00/4&224f42ef&0&000000
Source: Amcache.hve.4.dr	Binary or memory string: .Z$c:/windows/system32/drivers/vmci.sys
Source: Amcache.hve.4.dr	Binary or memory string: :scsi/disk&ven_vmware&prod_virtual_disk/4&1656f219&0&000000
Source: Amcache.hve.4.dr	Binary or memory string: pci\ven_15ad&dev_0740&subsys_074015ad,pci\ven_15ad&dev_0740,root\vmwvmcihostdev
Source: Amcache.hve.4.dr	Binary or memory string: c:/windows/system32/drivers/vmci.sys
Source: Amcache.hve.4.dr	Binary or memory string: scsi/cdrom&ven_necvmwar&prod_vmware_sata_cd00/4&224f42ef&0&000000
Source: Amcache.hve.4.dr	Binary or memory string: vmci.sys
Source: Amcache.hve.4.dr	Binary or memory string: VMware-56 4d 43 71 48 15 3d ed-ae e6 c7 5a ec d9 3b f0
Source: Amcache.hve.4.dr	Binary or memory string: vmci.syshbin`
Source: Amcache.hve.4.dr	Binary or memory string: \driver\vmci,\driver\pci
Source: Amcache.hve.4.dr	Binary or memory string: scsi/disk&ven_vmware&prod_virtual_disk/4&1656f219&0&000000
Source: Amcache.hve.4.dr	Binary or memory string: VMware20,1
Source: Amcache.hve.4.dr	Binary or memory string: Microsoft Hyper-V Generation Counter
Source: Amcache.hve.4.dr	Binary or memory string: NECVMWar VMware SATA CD00
Source: Amcache.hve.4.dr	Binary or memory string: VMware Virtual disk SCSI Disk Device
Source: Amcache.hve.4.dr	Binary or memory string: scsi\cdromnecvmwarvmware_sata_cd001.00,scsi\cdromnecvmwarvmware_sata_cd00,scsi\cdromnecvmwar,scsi\necvmwarvmware_sata_cd001,necvmwarvmware_sata_cd001,gencdrom
Source: Amcache.hve.4.dr	Binary or memory string: scsi\diskvmware__virtual_disk____2.0_,scsi\diskvmware__virtual_disk____,scsi\diskvmware__,scsi\vmware__virtual_disk____2,vmware__virtual_disk____2,gendisk
Source: Amcache.hve.4.dr	Binary or memory string: Microsoft Hyper-V Virtualization Infrastructure Driver
Source: Amcache.hve.4.dr	Binary or memory string: VMware PCI VMCI Bus Device
Source: Amcache.hve.4.dr	Binary or memory string: VMware VMCI Bus Device
Source: Amcache.hve.4.dr	Binary or memory string: VMware Virtual RAM
Source: Amcache.hve.4.dr	Binary or memory string: BiosVendor:VMware, Inc.,BiosVersion:VMW201.00V.20829224.B64.2211211842,BiosReleaseDate:11/21/2022,BiosMajorRelease:0xff,BiosMinorRelease:0xff,SystemManufacturer:VMware, Inc.,SystemProduct:VMware20,1,SystemFamily:,SystemSKUNumber:,BaseboardManufacturer:,BaseboardProduct:,BaseboardVersion:,EnclosureType:0x1
Source: Amcache.hve.4.dr	Binary or memory string: vmci.inf_amd64_68ed49469341f563

Source: C:\Users\user\Desktop\Base64.exe	Process queried: DebugPort			Jump to behavior
Source: C:\Users\user\Desktop\Base64.exe	Process queried: DebugPort			Jump to behavior

Description:	Adversaries may execute their own malicious payloads by side-loading DLLs. Similar to DLL Search Order Hijacking , side-loading involves hijacking which DLL a program loads. But rather than just planting the DLL within the search order of a program then waiting for the victim application to be invoked, adversaries may directly side-load their payloads by planting then invoking a legitimate application that executes their payload(s).
Tactics:	Defense Evasion, Persistence, Privilege Escalation
Data Sources:	File: File Creation, File: File Modification, Module: Module Load, Process: Process Creation
Platforms:	Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may inject code into processes in order to evade process-based defenses as well as possibly elevate privileges. Process injection is a method of executing arbitrary code in the address space of a separate live process. Running code in the context of another process may allow access to the process's memory, system/network resources, and possibly elevated privileges. Execution via process injection may also evade detection from security products since the execution is masked under a legitimate process.
Tactics:	Defense Evasion, Privilege Escalation
Data Sources:	File: File Metadata, File: File Modification, Module: Module Load, Process: OS API Execution, Process: Process Access, Process: Process Metadata, Process: Process Modification
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may employ various means to detect and avoid virtualization and analysis environments. This may include changing behaviors based on the results of checks for the presence of artifacts indicative of a virtual machine environment (VME) or sandbox. If the adversary detects a VME, they may alter their malware to disengage from the victim or conceal the core functions of the implant. They may also search for VME artifacts before dropping secondary or additional payloads. Adversaries may use the information learned from [Virtualization/Sandbox Evasion](https://attack.mitre.org/techniques/T1497) during automated discovery to shape follow-on behaviors.
Tactics:	Defense Evasion, Discovery
Data Sources:	Command: Command Execution, Process: OS API Execution, Process: Process Creation
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	An adversary may gather the system time and/or time zone from a local or remote system. The system time is set and stored by the Windows Time Service within a domain to maintain time synchronization between systems and services in an enterprise network.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Process: OS API Execution, Process: Process Creation
Platforms:	Network, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get a listing of security software, configurations, defensive tools, and sensors that are installed on a system or in a cloud environment. This may include things such as firewall rules and anti-virus. Adversaries may use the information from Security Software Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Firewall: Firewall Enumeration, Firewall: Firewall Metadata, Process: OS API Execution, Process: Process Creation
Platforms:	Azure AD, Google Workspace, IaaS, Linux, macOS, Office 365, SaaS, Windows
Url:	Open detailed description by Mitre

Description:	An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and architecture. Adversaries may use the information from System Information Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Process: OS API Execution, Process: Process Creation
Platforms:	IaaS, Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may employ a known encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol. Despite the use of a secure algorithm, these implementations may be vulnerable to reverse engineering if secret keys are encoded and/or generated within malware samples/configuration files.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

Warning!

Windows Analysis Report Base64.exe

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Threat Intel

Malware Configuration

Yara Signatures

Initial Sample

Memory Dumps

Unpacked PEs

Sigma Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Cryptography

Compliance

Networking

System Summary

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

Anti Debugging

Language, Device and Operating System Detection

Lowering of HIPS / PFW / Operating System Security Settings

Remote Access Functionality

Mitre Att&ck Matrix

Behavior Graph

Screenshots

Thumbnails

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Unpacked PE Files

Domains

URLs

Domains and IPs

Contacted Domains

URLs from Memory and Binaries

World Map of Contacted IPs

General Information

Warnings

Simulations

Behavior and APIs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_Base64.exe_499bb04f6bdfe31790fb9aa21d698a8ce2359192_99c0ef0c_e220a379-e700-4e94-b819-ac1f88aca209\Report.wer

C:\ProgramData\Microsoft\Windows\WER\Temp\WERBA9F.tmp.dmp

C:\ProgramData\Microsoft\Windows\WER\Temp\WERBB1D.tmp.WERInternalMetadata.xml

C:\ProgramData\Microsoft\Windows\WER\Temp\WERBB4C.tmp.xml

C:\Windows\appcompat\Programs\Amcache.hve

Static File Info

General

File Icon

Static PE Info

General

Entrypoint Preview

Rich Headers

Data Directories

Sections

Resources

Imports

Possible Origin

Network Behavior

Statistics

CPU Usage

Memory Usage

Windows Analysis Report
Base64.exe

Function 00007FF781851000 Relevance: 10.6, APIs: 5, Strings: 1, Instructions: 81
memoryencryptionCOMMON

Function 00007FF781851278 Relevance: 22.6, APIs: 15, Instructions: 94
COMMON