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Windows Analysis Report
Bearfoos.A!ml' in file 'trvservice.exe

Overview

General Information

Sample Name:	Bearfoos.A!ml' in file 'trvservice.exe (renamed file extension from exe' to exe, renamed because original name is a hash value)
Original Sample Name:	Bearfoos.A!ml' in file 'trvservice.exe'
Analysis ID:	1301509
MD5:	e5e7244199424d67a7c9a00869aa640a
SHA1:	e7f197c527989c73df00a5e1e44b61a6cdd838d0
SHA256:	3ada30c76adacbbf2b15677641fcbdd94fdf162f600878f09aeedfff48be0e06
Infos:

Detection

Score:	2
Range:	0 - 100
Whitelisted:	false
Confidence:	80%

Signatures

Sample execution stops while process was sleeping (likely an evasion)

PE file contains more sections than normal

Program does not show much activity (idle)

PE file contains sections with non-standard names

Classification

Process Tree

System is w10x64

Bearfoos.A!ml' in file 'trvservice.exe (PID: 7128 cmdline: C:\Users\user\Desktop\Bearfoos.A!ml' in file 'trvservice.exe MD5: E5E7244199424D67A7C9A00869AA640A)

conhost.exe (PID: 6156 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)

cleanup

Joe Sandbox Signatures

• Compliance
• System Summary
• Data Obfuscation
• Hooking and other Techniques for Hiding and Protection
• Malware Analysis System Evasion
• Anti Debugging

Click to jump to signature section

Show All Signature Results

There are no malicious signatures, click here to show all signatures.

Source: Bearfoos.A!ml' in file 'trvservice.exe

Static PE information: HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT, TERMINAL_SERVER_AWARE

Source: Bearfoos.A!ml' in file 'trvservice.exe

Static PE information: Number of sections : 13 > 10

Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: Section: /19 ZLIB complexity 0.9997084888059702
Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: Section: /32 ZLIB complexity 0.9942730402542372
Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: Section: /65 ZLIB complexity 0.9992118737305349
Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: Section: /78 ZLIB complexity 0.9895968614718614

Source: Bearfoos.A!ml' in file 'trvservice.exe

Static PE information: Section: .text IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ

Source: C:\Users\user\Desktop\Bearfoos.A!ml' in file 'trvservice.exe

Key opened: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers

Jump to behavior

Source: Bearfoos.A!ml' in file 'trvservice.exe	String found in binary or memory: GOMAXPROCSGOMEMLIMITGetIfEntryGetVersionGlagoliticHTTP_PROXYINSERTBULKIP addressKEEP_NULLSKeep-AliveKharoshthiLockFileExManichaeanMessage-IdNo ContentOld_ItalicOld_PermicOld_TurkicOther_MathPOSTALCODEParseAddr(ParseFloatPhoenicianProcessingRIPEMD-160RST_STREAMSHA256-RSASHA384-RSASHA512-RSASaurashtraSet-CookieUser-AgentWSACleanupWSASocketWWSAStartupatomicand8audio/aiffaudio/midiaudio/mpegaudio/waveavx512bf16avx512gfniavx512ifmaavx512vaesavx512vbmiavx512vnnibinary(%d)complex128createtempdebug calldnsapi.dllexitThreadexp masterfloat32nanfloat64nanfont/woff2getsockoptgo-mssqldbgoroutine http_proxyimage/avifimage/jpegimage/webpimpossibleinvalid IPinvalidptrkeep-alivelocal-addrmSpanInUsemultipart-notifyListowner diedprofInsertres binderres masterresumptionrow[%d] %sruntime: gs.state = scan errorschedtracesemacquireset-cookiesetsockoptskipping: smallmoneystackLarget.Kind == tracefree(tracegc()
Source: Bearfoos.A!ml' in file 'trvservice.exe	String found in binary or memory: C:/Program Files/Go/src/net/addrselect.go

Source: C:\Users\user\Desktop\Bearfoos.A!ml' in file 'trvservice.exe

File opened: C:\Windows\system32\59635b8381018d6246a30475d71275ea908c85859a9855f7c46450b8bfa791dbAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

Jump to behavior

Source: classification engine

Classification label: clean2.winEXE@2/0@0/0

Source: unknown	Process created: C:\Users\user\Desktop\Bearfoos.A!ml' in file 'trvservice.exe C:\Users\user\Desktop\Bearfoos.A!ml' in file 'trvservice.exe
Source: C:\Users\user\Desktop\Bearfoos.A!ml' in file 'trvservice.exe	Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1

Source: C:\Windows\System32\conhost.exe

Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6156:120:WilError_01

Source: Bearfoos.A!ml' in file 'trvservice.exe

Static file information: File size 8675840 > 1048576

Source: Bearfoos.A!ml' in file 'trvservice.exe

Static PE information: Virtual size of .text is bigger than: 0x100000

Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: Raw size of .text is bigger than: 0x100000 < 0x28fa00
Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: Raw size of .rdata is bigger than: 0x100000 < 0x31e800

Source: Bearfoos.A!ml' in file 'trvservice.exe

Static PE information: HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT, TERMINAL_SERVER_AWARE

Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: section name: /4
Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: section name: /19
Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: section name: /32
Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: section name: /46
Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: section name: /65
Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: section name: /78
Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: section name: /90
Source: Bearfoos.A!ml' in file 'trvservice.exe	Static PE information: section name: .symtab

Source: C:\Users\user\Desktop\Bearfoos.A!ml' in file 'trvservice.exe	Process information set: FAILCRITICALERRORS \| NOGPFAULTERRORBOX			Jump to behavior
Source: C:\Users\user\Desktop\Bearfoos.A!ml' in file 'trvservice.exe	Process information set: NOGPFAULTERRORBOX \| NOOPENFILEERRORBOX			Jump to behavior

Source: C:\Windows\System32\conhost.exe

Last function: Thread delayed

Source: all processes

Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected

Source: Bearfoos.A!ml' in file 'trvservice.exe, 00000000.00000002.641443279.00000207CC8F8000.00000004.00000020.00020000.00000000.sdmp

Binary or memory string: Hyper-V RAW%SystemRoot%\system32\mswsock.dll

Source: all processes

Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected

Mitre Att&ck Matrix

Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Exfiltration	Command and Control	Network Effects	Remote Service Effects	Impact
Valid Accounts	2 Command and Scripting Interpreter	Path Interception	1 Process Injection	1 Software Packing	OS Credential Dumping	1 Security Software Discovery	Remote Services	Data from Local System	Exfiltration Over Other Network Medium	Data Obfuscation	Eavesdrop on Insecure Network Communication	Remotely Track Device Without Authorization	Modify System Partition
Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	Boot or Logon Initialization Scripts	1 Process Injection	LSASS Memory	1 System Information Discovery	Remote Desktop Protocol	Data from Removable Media	Exfiltration Over Bluetooth	Junk Data	Exploit SS7 to Redirect Phone Calls/SMS	Remotely Wipe Data Without Authorization	Device Lockout

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

Screenshots

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Thumbnails

This section contains all screenshots as thumbnails, including those not shown in the slideshow.

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

⊘No Antivirus matches

Dropped Files

⊘No Antivirus matches

Unpacked PE Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Contacted Domains

⊘No contacted domains info

World Map of Contacted IPs

⊘No contacted IP infos

General Information

Joe Sandbox Version:	38.0.0 Beryl
Analysis ID:	1301509
Start date and time:	2023-09-01 11:15:25 +02:00
Joe Sandbox Product:	CloudBasic
Overall analysis duration:	0h 5m 31s
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	default.jbs
Analysis system description:	Windows 10 64 bit v1803 with Office Professional Plus 2016, Chrome 104, IE 11, Adobe Reader DC 19, Java 8 Update 211
Number of analysed new started processes analysed:	16
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 HDC enabled AMSI enabled
Analysis Mode:	default
Analysis stop reason:	Timeout
Sample file name:	Bearfoos.A!ml' in file 'trvservice.exe (renamed file extension from exe' to exe, renamed because original name is a hash value)
Original Sample Name:	Bearfoos.A!ml' in file 'trvservice.exe'
Detection:	CLEAN
Classification:	clean2.winEXE@2/0@0/0
EGA Information:	Failed
HDC Information:	Successful, ratio: 100% (good quality ratio 100%) Quality average: 79.7% Quality standard deviation: 24.6%
HCA Information:	Failed

Warnings

Exclude process from analysis (whitelisted): MpCmdRun.exe, audiodg.exe, BackgroundTransferHost.exe, WMIADAP.exe, backgroundTaskHost.exe, conhost.exe, svchost.exe
Excluded domains from analysis (whitelisted): client.wns.windows.com, tse1.mm.bing.net, ctldl.windowsupdate.com, g.bing.com, arc.msn.com
Execution Graph export aborted for target Bearfoos.A!ml' in file 'trvservice.exe, PID 7128 because there are no executed function
Not all processes where analyzed, report is missing behavior information
VT rate limit hit for: Bearfoos.A!ml' in file 'trvservice.exe

Simulations

Behavior and APIs

⊘No simulations

Joe Sandbox View / Context

IPs

⊘No context

Domains

⊘No context

ASNs

⊘No context

JA3 Fingerprints

⊘No context

Dropped Files

⊘No context

Created / dropped Files

⊘No created / dropped files found

Static File Info

General

File type:	PE32+ executable (console) x86-64 (stripped to external PDB), for MS Windows
Entropy (8bit):	6.709490119488056
TrID:	Win64 Executable (generic) (12005/4) 74.95% Generic Win/DOS Executable (2004/3) 12.51% DOS Executable Generic (2002/1) 12.50% Autodesk FLIC Image File (extensions: flc, fli, cel) (7/3) 0.04%
File name:	Bearfoos.A!ml' in file 'trvservice.exe
File size:	8'675'840 bytes
MD5:	e5e7244199424d67a7c9a00869aa640a
SHA1:	e7f197c527989c73df00a5e1e44b61a6cdd838d0
SHA256:	3ada30c76adacbbf2b15677641fcbdd94fdf162f600878f09aeedfff48be0e06
SHA512:	511c6cbb54becb883ae62974805a1c9639860d114f5ed8395d1499ddf01ec9ee2e246d8c375db6918159db2ab760ce0d79626189ef63da8286f84648b4ee686f
SSDEEP:	98304:w3ba/iW06gNgpcE3M0YhN6E01LIvl9Q875U+Kqry6jXi4b:Iiog73M0Y2V1MN6875PlXi4
TLSH:	A2968D47FC8555A4D6EEE230C6358252BA71BC880B3037D32B61F7B92A73BD46A79350
File Content Preview:	MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$.......PE..d.........~.......".......(..........o........@...........................................`... ............................

File Icon


Icon Hash:	90cececece8e8eb0

Static PE Info

General

Entrypoint:	0x466fa0
Entrypoint Section:	.text
Digitally signed:	false
Imagebase:	0x400000
Subsystem:	windows cui
Image File Characteristics:	EXECUTABLE_IMAGE, LARGE_ADDRESS_AWARE, DEBUG_STRIPPED
DLL Characteristics:	HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT, TERMINAL_SERVER_AWARE
Time Stamp:	0x0 [Thu Jan 1 00:00:00 1970 UTC]
TLS Callbacks:
CLR (.Net) Version:
OS Version Major:	6
OS Version Minor:	1
File Version Major:	6
File Version Minor:	1
Subsystem Version Major:	6
Subsystem Version Minor:	1
Import Hash:	f0ea7b7844bbc5bfa9bb32efdcea957c

Entrypoint Preview

Instruction
jmp 00007F98F8664340h
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
int3
pushfd
cld
dec eax
sub esp, 000000E0h
dec eax
mov dword ptr [esp], edi
dec eax
mov dword ptr [esp+08h], esi
dec eax
mov dword ptr [esp+10h], ebp
dec eax
mov dword ptr [esp+18h], ebx
dec esp
mov dword ptr [esp+20h], esp
dec esp
mov dword ptr [esp+28h], ebp
dec esp
mov dword ptr [esp+30h], esi
dec esp
mov dword ptr [esp+38h], edi
movups dqword ptr [esp+40h], xmm6
movups dqword ptr [esp+50h], xmm7
inc esp
movups dqword ptr [esp+60h], xmm0
inc esp
movups dqword ptr [esp+70h], xmm1
inc esp
movups dqword ptr [esp+00000080h], xmm2
inc esp
movups dqword ptr [esp+00000090h], xmm3
inc esp
movups dqword ptr [esp+000000A0h], xmm4
inc esp
movups dqword ptr [esp+000000B0h], xmm5
inc esp
movups dqword ptr [esp+000000C0h], xmm6
inc esp
movups dqword ptr [esp+000000D0h], xmm7
dec eax
sub esp, 30h
dec ecx
mov ebp, ecx
dec ecx
mov edi, eax
dec eax
mov edx, dword ptr [005DF43Bh]
dec eax
mov edx, dword ptr [edx]
dec eax
cmp edx, 00000000h
jne 00007F98F8667FAEh
dec eax
mov eax, 00000000h
jmp 00007F98F8668073h
dec eax
mov edx, dword ptr [edx]
dec eax

Data Directories

Name	Virtual Address	Virtual Size	Is in Section
IMAGE_DIRECTORY_ENTRY_EXPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IMPORT	0x843000	0x490	.idata
IMAGE_DIRECTORY_ENTRY_RESOURCE	0x0	0x0
IMAGE_DIRECTORY_ENTRY_EXCEPTION	0x0	0x0
IMAGE_DIRECTORY_ENTRY_SECURITY	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BASERELOC	0x844000	0xb0e8	.reloc
IMAGE_DIRECTORY_ENTRY_DEBUG	0x0	0x0
IMAGE_DIRECTORY_ENTRY_COPYRIGHT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_GLOBALPTR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_TLS	0x0	0x0
IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IAT	0x5b02a0	0x148	.data
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	Xored PE	ZLIB Complexity	File Type	Entropy	Characteristics
.text	0x1000	0x28f8bc	0x28fa00	unknown	unknown	unknown	unknown	IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
.rdata	0x291000	0x31e618	0x31e800	unknown	unknown	unknown	unknown	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
.data	0x5b0000	0x9d030	0x40600	False	0.38848983616504856	data	5.118060162796478	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
/4	0x64e000	0x127	0x200	False	0.6171875	data	5.097874074212899	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_ALIGN_1BYTES, IMAGE_SCN_ALIGN_4BYTES, IMAGE_SCN_ALIGN_16BYTES, IMAGE_SCN_ALIGN_64BYTES, IMAGE_SCN_ALIGN_256BYTES, IMAGE_SCN_ALIGN_1024BYTES, IMAGE_SCN_ALIGN_4096BYTES, IMAGE_SCN_ALIGN_MASK, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
/19	0x64f000	0x6cd72	0x6ce00	False	0.9997084888059702	data	7.996872075546988	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_ALIGN_1BYTES, IMAGE_SCN_ALIGN_4BYTES, IMAGE_SCN_ALIGN_16BYTES, IMAGE_SCN_ALIGN_64BYTES, IMAGE_SCN_ALIGN_256BYTES, IMAGE_SCN_ALIGN_1024BYTES, IMAGE_SCN_ALIGN_4096BYTES, IMAGE_SCN_ALIGN_MASK, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
/32	0x6bc000	0x16019	0x16200	False	0.9942730402542372	data	7.9451631215906575	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_ALIGN_1BYTES, IMAGE_SCN_ALIGN_4BYTES, IMAGE_SCN_ALIGN_16BYTES, IMAGE_SCN_ALIGN_64BYTES, IMAGE_SCN_ALIGN_256BYTES, IMAGE_SCN_ALIGN_1024BYTES, IMAGE_SCN_ALIGN_4096BYTES, IMAGE_SCN_ALIGN_MASK, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
/46	0x6d3000	0x30	0x200	False	0.103515625	data	0.8556848540171443	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_ALIGN_1BYTES, IMAGE_SCN_ALIGN_4BYTES, IMAGE_SCN_ALIGN_16BYTES, IMAGE_SCN_ALIGN_64BYTES, IMAGE_SCN_ALIGN_256BYTES, IMAGE_SCN_ALIGN_1024BYTES, IMAGE_SCN_ALIGN_4096BYTES, IMAGE_SCN_ALIGN_MASK, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
/65	0x6d4000	0xb89a9	0xb8a00	False	0.9992118737305349	data	7.997951108061727	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_ALIGN_1BYTES, IMAGE_SCN_ALIGN_4BYTES, IMAGE_SCN_ALIGN_16BYTES, IMAGE_SCN_ALIGN_64BYTES, IMAGE_SCN_ALIGN_256BYTES, IMAGE_SCN_ALIGN_1024BYTES, IMAGE_SCN_ALIGN_4096BYTES, IMAGE_SCN_ALIGN_MASK, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
/78	0x78d000	0x90454	0x90600	False	0.9895968614718614	data	7.994922853982185	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_ALIGN_1BYTES, IMAGE_SCN_ALIGN_4BYTES, IMAGE_SCN_ALIGN_16BYTES, IMAGE_SCN_ALIGN_64BYTES, IMAGE_SCN_ALIGN_256BYTES, IMAGE_SCN_ALIGN_1024BYTES, IMAGE_SCN_ALIGN_4096BYTES, IMAGE_SCN_ALIGN_MASK, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
/90	0x81e000	0x24574	0x24600	False	0.9740858569587629	data	7.807643467235927	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_ALIGN_1BYTES, IMAGE_SCN_ALIGN_4BYTES, IMAGE_SCN_ALIGN_16BYTES, IMAGE_SCN_ALIGN_64BYTES, IMAGE_SCN_ALIGN_256BYTES, IMAGE_SCN_ALIGN_1024BYTES, IMAGE_SCN_ALIGN_4096BYTES, IMAGE_SCN_ALIGN_MASK, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
.idata	0x843000	0x490	0x600	False	0.3372395833333333	data	3.613712925284703	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
.reloc	0x844000	0xb0e8	0xb200	False	0.2615212429775281	data	5.440317243838136	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
.symtab	0x850000	0x5b017	0x5b200	False	0.2264821244855967	data	5.388707315887706	IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ

Imports

DLL	Import
kernel32.dll	WriteFile, WriteConsoleW, WaitForMultipleObjects, WaitForSingleObject, VirtualQuery, VirtualFree, VirtualAlloc, TlsAlloc, SwitchToThread, SuspendThread, SetWaitableTimer, SetUnhandledExceptionFilter, SetProcessPriorityBoost, SetEvent, SetErrorMode, SetConsoleCtrlHandler, ResumeThread, PostQueuedCompletionStatus, LoadLibraryA, LoadLibraryW, SetThreadContext, GetThreadContext, GetSystemInfo, GetSystemDirectoryA, GetStdHandle, GetQueuedCompletionStatusEx, GetProcessAffinityMask, GetProcAddress, GetEnvironmentStringsW, GetConsoleMode, FreeEnvironmentStringsW, ExitProcess, DuplicateHandle, CreateWaitableTimerExW, CreateThread, CreateIoCompletionPort, CreateFileA, CreateEventA, CloseHandle, AddVectoredExceptionHandler

DLL

Import

kernel32.dll

WriteFile, WriteConsoleW, WaitForMultipleObjects, WaitForSingleObject, VirtualQuery, VirtualFree, VirtualAlloc, TlsAlloc, SwitchToThread, SuspendThread, SetWaitableTimer, SetUnhandledExceptionFilter, SetProcessPriorityBoost, SetEvent, SetErrorMode, SetConsoleCtrlHandler, ResumeThread, PostQueuedCompletionStatus, LoadLibraryA, LoadLibraryW, SetThreadContext, GetThreadContext, GetSystemInfo, GetSystemDirectoryA, GetStdHandle, GetQueuedCompletionStatusEx, GetProcessAffinityMask, GetProcAddress, GetEnvironmentStringsW, GetConsoleMode, FreeEnvironmentStringsW, ExitProcess, DuplicateHandle, CreateWaitableTimerExW, CreateThread, CreateIoCompletionPort, CreateFileA, CreateEventA, CloseHandle, AddVectoredExceptionHandler

• Bearfoos.A!ml' in file 'trvservice.exe
• conhost.exe

Click to jump to process

Click to jump to process

High Level Behavior Distribution

• File
• Network

Click to dive into process behavior distribution

Behavior

• Bearfoos.A!ml' in file 'trvservice.exe
• conhost.exe

Click to jump to process

Target ID:	0
Start time:	11:16:19
Start date:	01/09/2023
Path:	C:\Users\user\Desktop\Bearfoos.A!ml' in file 'trvservice.exe
Wow64 process (32bit):	false
Commandline:	C:\Users\user\Desktop\Bearfoos.A!ml' in file 'trvservice.exe
Imagebase:	0xcf0000
File size:	8'675'840 bytes
MD5 hash:	E5E7244199424D67A7C9A00869AA640A
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	Go lang
Reputation:	low
Has exited:	false

Show Windows behavior

Target ID:	1
Start time:	11:16:19
Start date:	01/09/2023
Path:	C:\Windows\System32\conhost.exe
Wow64 process (32bit):	false
Commandline:	C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Imagebase:	0x7ff766460000
File size:	625'664 bytes
MD5 hash:	EA777DEEA782E8B4D7C7C33BBF8A4496
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	false

Show Windows behavior

Description:	Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries. These interfaces and languages provide ways of interacting with computer systems and are a common feature across many different platforms. Most systems come with some built-in command-line interface and scripting capabilities, for example, macOS and Linux distributions include some flavor of Unix Shell while Windows installations include the Windows Command Shell and PowerShell .
Tactics:	Execution
Data Sources:	PowerShell logs, Process command-line parameters, Process monitoring, Windows event logs
Platforms:	Linux, macOS, 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:	API monitoring, DLL monitoring, File monitoring, Named Pipes, Process monitoring
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may perform software packing or virtual machine software protection to conceal their code. Software packing is a method of compressing or encrypting an executable. Packing an executable changes the file signature in an attempt to avoid signature-based detection. Most decompression techniques decompress the executable code in memory. Virtual machine software protection translates an executable's original code into a special format that only a special virtual machine can run. A virtual machine is then called to run this code.
Tactics:	Defense Evasion
Data Sources:	Binary file metadata
Platforms:	macOS, 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:	AWS CloudTrail logs, Azure activity logs, File monitoring, Process command-line parameters, Process monitoring, Stackdriver logs
Platforms:	AWS, Azure, Azure AD, GCP, 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:	AWS CloudTrail logs, Azure activity logs, Process command-line parameters, Process monitoring, Stackdriver logs
Platforms:	AWS, Azure, GCP, Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

Warning!

Windows Analysis Report Bearfoos.A!ml' in file 'trvservice.exe

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Configuration

Yara Signatures

Sigma Signatures

Snort Signatures

Joe Sandbox Signatures

Compliance

System Summary

Data Obfuscation

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

Anti Debugging

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

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

Static File Info

General

File Icon

Static PE Info

General

Entrypoint Preview

Data Directories

Sections

Imports

Network Behavior

Statistics

CPU Usage

Memory Usage

High Level Behavior Distribution

back

Behavior

System Behavior

Analysis Process: Bearfoos.A!ml' in file 'trvservice.exePID: 7128, Parent PID: 3524

General

File Activities

File Opened

File Created

File Attributes Queried

Other File Operations

Volume Information Queried

Device IO

Section Activities

Sections loaded by Windows

Sections loaded by Program

Registry Activities

Key Opened

Windows Analysis Report
Bearfoos.A!ml' in file 'trvservice.exe