darkcomet | 5131d0642a54d02c54545e823e706b89be27243608a047c07349fbc30e07dde5

Analysis

max time kernel
17s
max time network
18s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
19/05/2024, 10:45

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General

Target
VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe
Size 782KB
Sample240519-mteqbsef6v
SHA256 5131d0642a54d02c54545e823e706b89be27243608a047c07349fbc30e07dde5
MD5 f0a5b6bb52a088b9b8ee76b341e58e2b
SHA1 d362d5dee873c8c62489b95f4beb9fb7c5887ba4
SHA512 d06932744b4a7c156deaf76fe6cf64aea3ee4f5a4e7465674f710d5791296d0f66fa922267e137d7bc135e2d42c7efe97cffdda9ae922f678b260ded8c256a60
SSDEEP 12288:o9y0Qed1VRfr655Kw6kRaDsaXz2QEPCJj7bo7C1OC40r24bvryRrQ4ZUCR:o9Ce3/s5b5sV06j7bYAl42n/yRMNC
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet evasion persistence rat trojan

Malware Config

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\permdata\\java.exe"	svchost.exe

Sets file to hidden 1 TTPs 1 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
3600	attrib.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 2 IoCs

pid	Process
4552	svchost.exe
4604	java.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft Essentials = "C:\\Users\\Admin\\AppData\\Roaming\\MsMpEng.exe"	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\java = "C:\\permdata\\java.exe"	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4984 set thread context of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 25 IoCs

description	pid	Process
Token: SeDebugPrivilege	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe
Token: SeIncreaseQuotaPrivilege	4552	svchost.exe
Token: SeSecurityPrivilege	4552	svchost.exe
Token: SeTakeOwnershipPrivilege	4552	svchost.exe
Token: SeLoadDriverPrivilege	4552	svchost.exe
Token: SeSystemProfilePrivilege	4552	svchost.exe
Token: SeSystemtimePrivilege	4552	svchost.exe
Token: SeProfSingleProcessPrivilege	4552	svchost.exe
Token: SeIncBasePriorityPrivilege	4552	svchost.exe
Token: SeCreatePagefilePrivilege	4552	svchost.exe
Token: SeBackupPrivilege	4552	svchost.exe
Token: SeRestorePrivilege	4552	svchost.exe
Token: SeShutdownPrivilege	4552	svchost.exe
Token: SeDebugPrivilege	4552	svchost.exe
Token: SeSystemEnvironmentPrivilege	4552	svchost.exe
Token: SeChangeNotifyPrivilege	4552	svchost.exe
Token: SeRemoteShutdownPrivilege	4552	svchost.exe
Token: SeUndockPrivilege	4552	svchost.exe
Token: SeManageVolumePrivilege	4552	svchost.exe
Token: SeImpersonatePrivilege	4552	svchost.exe
Token: SeCreateGlobalPrivilege	4552	svchost.exe
Token: 33	4552	svchost.exe
Token: 34	4552	svchost.exe
Token: 35	4552	svchost.exe
Token: 36	4552	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4984 wrote to memory of 4552	4984	VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe	84
PID 4552 wrote to memory of 4620	4552	svchost.exe	85
PID 4552 wrote to memory of 4620	4552	svchost.exe	85
PID 4552 wrote to memory of 4620	4552	svchost.exe	85
PID 4552 wrote to memory of 4604	4552	svchost.exe	87
PID 4552 wrote to memory of 4604	4552	svchost.exe	87
PID 4552 wrote to memory of 4604	4552	svchost.exe	87
PID 4620 wrote to memory of 3600	4620	cmd.exe	89
PID 4620 wrote to memory of 3600	4620	cmd.exe	89
PID 4620 wrote to memory of 3600	4620	cmd.exe	89

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3600	attrib.exe

C:\Users\Admin\AppData\Local\Temp\VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe
"C:\Users\Admin\AppData\Local\Temp\VirusShare_f0a5b6bb52a088b9b8ee76b341e58e2b.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4984
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4552
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4620
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      4⤵
      Sets file to hidden
      Views/modifies file attributes
      PID:3600
- - C:\permdata\java.exe
    "C:\permdata\java.exe"
    3⤵
    - Executes dropped EXE
    PID:4604

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

svchost.exe

Path C:\Users\Admin\AppData\Local\Temp\svchost.exe
Size 34KB
SHA256 3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9
MD5 e118330b4629b12368d91b9df6488be0
SHA1 ce90218c7e3b90df2a3409ec253048bb6472c2fd
SHA512 ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0
SSDEEP 768:Paq4bp49YK+2Cza0pS6icHmMl9CvwOElkn3yKdn5y85p3:ud4+KTMVJHmMsEBKdn5vj
MD5 SHA1 SHA512 SSDEEP

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tmpcmd.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat
Size 50B
SHA256 adaf4a84b41e410b02e261cfd0fe7739d98647eab73c3badd32ac6e39f26351b
MD5 b774ae3fb1da087e1f83b4f7b2060e5a
SHA1 97eb9be49ac3af9c851c9e1e84e32bfd53e325a8
SHA512 f75d0f95f7306d26a12b414bfe37b97fbd37546cb3c6e403def7077329ddffb4b45d5c5f0ba0e7bb6d72851d2d691b0a85267beead42f7cbf2e8c3d45a3b4701
MD5 SHA1 SHA512

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memory/4552-6-0x0000000000400000-0x00000000004CB000-memory.dmp

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memory/4552-9-0x0000000000400000-0x00000000004CB000-memory.dmp

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memory/4552-13-0x0000000000400000-0x00000000004CB000-memory.dmp

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memory/4552-11-0x0000000000400000-0x00000000004CB000-memory.dmp

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memory/4552-18-0x00000000025D0000-0x00000000025D1000-memory.dmp

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memory/4552-29-0x0000000000400000-0x00000000004CB000-memory.dmp

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memory/4984-0-0x0000000074A62000-0x0000000074A63000-memory.dmp

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memory/4984-1-0x0000000074A60000-0x0000000075011000-memory.dmp

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memory/4984-3-0x0000000074A60000-0x0000000075011000-memory.dmp

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memory/4984-31-0x0000000074A60000-0x0000000075011000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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