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Windows Analysis Report
nircmd.exe

Overview

General Information

Sample Name:	nircmd.exe
Analysis ID:	1302837
MD5:	84d499f558570c32f4cb100a9124890b
SHA1:	9adfc7ab66348d84ebdd9c1e8093cad4cc8485ef
SHA256:	31b3b228382dc359f22ae97b2602eee81dc743fb21196061eacc6619533881f5
Infos:

Detection

Score:	21
Range:	0 - 100
Whitelisted:	false
Confidence:	100%

Signatures

Uses the nircmd tool (NirSoft)

Uses 32bit PE files

Program does not show much activity (idle)

Yara detected NirCmd tool

Classification

Process Tree

System is w10x64_ra

nircmd.exe (PID: 4608 cmdline: C:\Users\user\Desktop\nircmd.exe MD5: 84D499F558570C32F4CB100A9124890B)

cleanup

Yara Signatures

Memory Dumps

Source	Rule	Description	Author	Strings
00000000.00000002.3799365911.0000000000401000.00000040.00000001.01000000.00000003.sdmp	JoeSecurity_NirCmd	Yara detected NirCmd tool	Joe Security

Sigma Signatures

⊘No Sigma rule has matched

Snort Signatures

⊘No Snort rule has matched

Joe Sandbox Signatures

• Compliance
• System Summary
• Data Obfuscation
• Malware Analysis System Evasion
• Anti Debugging

Click to jump to signature section

Show All Signature Results

Source: nircmd.exe

Static PE information: RELOCS_STRIPPED, EXECUTABLE_IMAGE, 32BIT_MACHINE

System Summary

Uses the nircmd tool (NirSoft)

Source: unknown

Process created: C:\Users\user\Desktop\nircmd.exe C:\Users\user\Desktop\nircmd.exe

Source: nircmd.exe

Static PE information: RELOCS_STRIPPED, EXECUTABLE_IMAGE, 32BIT_MACHINE

Source: Yara match

File source: 00000000.00000002.3799365911.0000000000401000.00000040.00000001.01000000.00000003.sdmp, type: MEMORY

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

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

Source: classification engine

Classification label: sus21.evad.winEXE@1/0@0/0

Source: initial sample	Static PE information: section name: UPX0
Source: initial sample	Static PE information: section name: UPX1

Source: all processes

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

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	Windows Management Instrumentation	Path Interception	Path Interception	1 Software Packing	OS Credential Dumping	1 System Information 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 Obfuscated Files or Information	LSASS Memory	Application Window 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

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

Source	Detection	Scanner	Label	Link
nircmd.exe	16%	ReversingLabs

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:	1302837
Start date and time:	2023-09-04 12:52:10 +02:00
Joe Sandbox Product:	CloudBasic
Overall analysis duration:
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	defaultwindowsinteractivecookbook.jbs
Analysis system description:	Windows 10 64 bit version 1909 (MS Office 2019, IE 11, Chrome 104, Firefox 88, Adobe Reader DC 21, Java 8 u291, 7-Zip)
Number of analysed new started processes analysed:	5
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:	EGA enabled
Analysis Mode:	stream
Analysis stop reason:	Timeout
Sample file name:	nircmd.exe
Detection:	SUS
Classification:	sus21.evad.winEXE@1/0@0/0
Cookbook Comments:	Found application associated with file extension: .exe

Warnings

Exclude process from analysis (whitelisted): WMIADAP.exe, svchost.exe
Excluded domains from analysis (whitelisted): slscr.update.microsoft.com
VT rate limit hit for: nircmd.exe

Created / dropped Files

⊘No created / dropped files found

Static File Info

General

File type:	PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed
Entropy (8bit):	7.777549565737079
TrID:	Win32 Executable (generic) a (10002005/4) 99.39% UPX compressed Win32 Executable (30571/9) 0.30% Win32 EXE Yoda's Crypter (26571/9) 0.26% Generic Win/DOS Executable (2004/3) 0.02% DOS Executable Generic (2002/1) 0.02%
File name:	nircmd.exe
File size:	44'544 bytes
MD5:	84d499f558570c32f4cb100a9124890b
SHA1:	9adfc7ab66348d84ebdd9c1e8093cad4cc8485ef
SHA256:	31b3b228382dc359f22ae97b2602eee81dc743fb21196061eacc6619533881f5
SHA512:	560aaadebcbd425d35fc3a567c987a5f15a5f091962328f0479c1ec2378c732cca892eb3252179c8895413b0f3d08f44fbcf8c9d2375877c81622f42e6549c86
SSDEEP:	768:e4OBw5XDtS0d0xr6xczY6jU19q2T5D8EZdZzaJqn:+wtDtS0yV6B6A19FTiEZXaJqn
TLSH:	3313F115B370A129F9D391F5209A216543DCB12C587E87F73CF070D3ACF65A2BA9B212
File Content Preview:	MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$........6...W...W...W..=X...W...t...W..$t...W...t...W..=X...W...W...V.......W.......W.......W..Rich.W..........................PE..L..

File Icon


Icon Hash:	90cececece8e8eb0

Static PE Info

General

Entrypoint:	0x419d40
Entrypoint Section:	UPX1
Digitally signed:	false
Imagebase:	0x400000
Subsystem:	windows gui
Image File Characteristics:	RELOCS_STRIPPED, EXECUTABLE_IMAGE, 32BIT_MACHINE
DLL Characteristics:
Time Stamp:	0x5742A6D5 [Mon May 23 06:44:37 2016 UTC]
TLS Callbacks:
CLR (.Net) Version:
OS Version Major:	4
OS Version Minor:	0
File Version Major:	4
File Version Minor:	0
Subsystem Version Major:	4
Subsystem Version Minor:	0
Import Hash:	2f9a0154d6a293d856bfb68d9a5042ea

Entrypoint Preview

Instruction
pushad
mov esi, 00410000h
lea edi, dword ptr [esi-0000F000h]
push edi
jmp 00007FDD713BFCEDh
nop
mov al, byte ptr [esi]
inc esi
mov byte ptr [edi], al
inc edi
add ebx, ebx
jne 00007FDD713BFCE9h
mov ebx, dword ptr [esi]
sub esi, FFFFFFFCh
adc ebx, ebx
jc 00007FDD713BFCCFh
mov eax, 00000001h
add ebx, ebx
jne 00007FDD713BFCE9h
mov ebx, dword ptr [esi]
sub esi, FFFFFFFCh
adc ebx, ebx
adc eax, eax
add ebx, ebx
jnc 00007FDD713BFCD1h
jne 00007FDD713BFCEBh
mov ebx, dword ptr [esi]
sub esi, FFFFFFFCh
adc ebx, ebx
jnc 00007FDD713BFCC6h
xor ecx, ecx
sub eax, 03h
jc 00007FDD713BFCEFh
shl eax, 08h
mov al, byte ptr [esi]
inc esi
xor eax, FFFFFFFFh
je 00007FDD713BFD56h
mov ebp, eax
add ebx, ebx
jne 00007FDD713BFCE9h
mov ebx, dword ptr [esi]
sub esi, FFFFFFFCh
adc ebx, ebx
adc ecx, ecx
add ebx, ebx
jne 00007FDD713BFCE9h
mov ebx, dword ptr [esi]
sub esi, FFFFFFFCh
adc ebx, ebx
adc ecx, ecx
jne 00007FDD713BFD02h
inc ecx
add ebx, ebx
jne 00007FDD713BFCE9h
mov ebx, dword ptr [esi]
sub esi, FFFFFFFCh
adc ebx, ebx
adc ecx, ecx
add ebx, ebx
jnc 00007FDD713BFCD1h
jne 00007FDD713BFCEBh
mov ebx, dword ptr [esi]
sub esi, FFFFFFFCh
adc ebx, ebx
jnc 00007FDD713BFCC6h
add ecx, 02h
cmp ebp, FFFFF300h
adc ecx, 01h
lea edx, dword ptr [edi+ebp]
cmp ebp, FFFFFFFCh
jbe 00007FDD713BFCF1h
mov al, byte ptr [edx]
inc edx
mov byte ptr [edi], al
inc edi
dec ecx
jne 00007FDD713BFCD9h
jmp 00007FDD713BFC48h
nop
mov eax, dword ptr [edx]
add edx, 04h
mov dword ptr [edi], eax
add edi, 04h
sub ecx, 04h
jnbe 00007FDD713BFCD3h
add edi, ecx
jmp 00007FDD713CFC31h

Rich Headers

Programming Language:

[RES] VS2005 build 50727
[LNK] VS2005 build 50727

Data Directories

Name	Virtual Address	Virtual Size	Is in Section
IMAGE_DIRECTORY_ENTRY_EXPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IMPORT	0x1a7ac	0x208	.rsrc
IMAGE_DIRECTORY_ENTRY_RESOURCE	0x1a000	0x7ac	.rsrc
IMAGE_DIRECTORY_ENTRY_EXCEPTION	0x0	0x0
IMAGE_DIRECTORY_ENTRY_SECURITY	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BASERELOC	0x0	0x0
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	0x0	0x0
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
UPX0	0x1000	0xf000	0x0	False	0	empty	0.0	IMAGE_SCN_CNT_UNINITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
UPX1	0x10000	0xa000	0xa000	False	0.983544921875	data	7.90064511820452	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
.rsrc	0x1a000	0x1000	0xa00	False	0.45625	data	4.647879017935455	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE

Resources

Name	RVA	Size	Type	Language	Country	ZLIB Complexity
RT_CURSOR	0x171a8	0x134	data	English	United States	1.0357142857142858
RT_DIALOG	0x172dc	0x140	data	Hebrew	Israel	1.034375
RT_DIALOG	0x1741c	0x114	data	Hebrew	Israel	1.039855072463768
RT_GROUP_CURSOR	0x17530	0x14	data	English	United States	1.4
RT_VERSION	0x1a1ac	0x2a8	data	Hebrew	Israel	0.47941176470588237
RT_MANIFEST	0x1a458	0x351	ASCII text, with very long lines (388), with CRLF line terminators	English	United States	0.5111896348645465

Imports

DLL	Import
KERNEL32.DLL	LoadLibraryA, GetProcAddress, VirtualProtect, VirtualAlloc, VirtualFree, ExitProcess
ADVAPI32.dll	RegCloseKey
GDI32.dll	BitBlt
msvcrt.dll	exit
ole32.dll	CoInitialize
SHELL32.dll	ShellExecuteA
USER32.dll	GetDC
WINMM.dll	mixerOpen

Possible Origin

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

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 make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit. This is common behavior that can be used across different platforms and the network to evade defenses.
Tactics:	Defense Evasion
Data Sources:	Binary file metadata, Email gateway, Environment variable, File monitoring, Malware reverse engineering, Network intrusion detection system, Network protocol analysis, Process command-line parameters, Process monitoring, Process use of network, SSL/TLS inspection, Windows event logs
Platforms:	Linux, macOS, 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 nircmd.exe

Overview

General Information

Detection

Signatures

Classification

Process Tree

Yara Signatures

Memory Dumps

Sigma Signatures

Snort Signatures

Joe Sandbox Signatures

Compliance

System Summary

Data Obfuscation

Malware Analysis System Evasion

Anti Debugging

Mitre Att&ck Matrix

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

Created / dropped Files

Static File Info

General

File Icon

Static PE Info

General

Entrypoint Preview

Rich Headers

Data Directories

Sections

Resources

Imports

Possible Origin

Windows Analysis Report
nircmd.exe