darkcomet | 63721711206a78dedb75769140e4464337c83a4c01ea7b5584c89c824a4b2923

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17-04-2024 12:48

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General

Target

3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Size

658KB
MD5

3c41b88825ed5288001a0840f638bb15
SHA1

f12e5059fa029c6eea893ab2e6745922d0d89570
SHA256

3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f
SHA512

bc4b3a9088e0fa70731573c0ac4a8bb4cff8ea68ef737010bfdc6eb0fadaad2e78dda5ca67be4830137f4c3a174d2fec9989b5a638d71d83b4299ede540f4401
SSDEEP

12288:+9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/h5:KZ1xuVVjfFoynPaVBUR8f+kN10EBT

Score

10^/10

darkcomet guest16 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

sussysdfffdfff343.duckdns.org:1604

Mutex

DC_MUTEX-6F4SERN

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
mKaVRbcLZnA8
install
true
offline_keylogger
true
persistence
true
reg_key
Google Handler

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

Processes:

3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

Processes:

attrib.exeattrib.exe

pid	Process
4668	attrib.exe
1380	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

Processes:

3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3198953144-1466794930-246379610-1000\Control Panel\International\Geo\Nation	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid	Process
1768	msdcsc.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exemsdcsc.exeiexplore.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3198953144-1466794930-246379610-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Google Handler = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3198953144-1466794930-246379610-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Google Handler = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	msdcsc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3198953144-1466794930-246379610-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Google Handler = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	iexplore.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

msdcsc.exe

description	pid	Process	procid_target
PID 1768 set thread context of 3360	1768	msdcsc.exe	91

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

Processes:

3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

iexplore.exe

pid	Process
3360	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exemsdcsc.exeiexplore.exe

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeSecurityPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeTakeOwnershipPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeLoadDriverPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeSystemProfilePrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeSystemtimePrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeProfSingleProcessPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeIncBasePriorityPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeCreatePagefilePrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeBackupPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeRestorePrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeShutdownPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeDebugPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeSystemEnvironmentPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeChangeNotifyPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeRemoteShutdownPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeUndockPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeManageVolumePrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeImpersonatePrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeCreateGlobalPrivilege	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: 33	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: 34	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: 35	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: 36	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
Token: SeIncreaseQuotaPrivilege	1768	msdcsc.exe
Token: SeSecurityPrivilege	1768	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1768	msdcsc.exe
Token: SeLoadDriverPrivilege	1768	msdcsc.exe
Token: SeSystemProfilePrivilege	1768	msdcsc.exe
Token: SeSystemtimePrivilege	1768	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1768	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1768	msdcsc.exe
Token: SeCreatePagefilePrivilege	1768	msdcsc.exe
Token: SeBackupPrivilege	1768	msdcsc.exe
Token: SeRestorePrivilege	1768	msdcsc.exe
Token: SeShutdownPrivilege	1768	msdcsc.exe
Token: SeDebugPrivilege	1768	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1768	msdcsc.exe
Token: SeChangeNotifyPrivilege	1768	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1768	msdcsc.exe
Token: SeUndockPrivilege	1768	msdcsc.exe
Token: SeManageVolumePrivilege	1768	msdcsc.exe
Token: SeImpersonatePrivilege	1768	msdcsc.exe
Token: SeCreateGlobalPrivilege	1768	msdcsc.exe
Token: 33	1768	msdcsc.exe
Token: 34	1768	msdcsc.exe
Token: 35	1768	msdcsc.exe
Token: 36	1768	msdcsc.exe
Token: SeIncreaseQuotaPrivilege	3360	iexplore.exe
Token: SeSecurityPrivilege	3360	iexplore.exe
Token: SeTakeOwnershipPrivilege	3360	iexplore.exe
Token: SeLoadDriverPrivilege	3360	iexplore.exe
Token: SeSystemProfilePrivilege	3360	iexplore.exe
Token: SeSystemtimePrivilege	3360	iexplore.exe
Token: SeProfSingleProcessPrivilege	3360	iexplore.exe
Token: SeIncBasePriorityPrivilege	3360	iexplore.exe
Token: SeCreatePagefilePrivilege	3360	iexplore.exe
Token: SeBackupPrivilege	3360	iexplore.exe
Token: SeRestorePrivilege	3360	iexplore.exe
Token: SeShutdownPrivilege	3360	iexplore.exe
Token: SeDebugPrivilege	3360	iexplore.exe
Token: SeSystemEnvironmentPrivilege	3360	iexplore.exe
Token: SeChangeNotifyPrivilege	3360	iexplore.exe
Token: SeRemoteShutdownPrivilege	3360	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

iexplore.exe

pid	Process
3360	iexplore.exe

Suspicious use of WriteProcessMemory 42 IoCs

Processes:

3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.execmd.execmd.exemsdcsc.exeiexplore.exe

description	pid	Process	procid_target
PID 3956 wrote to memory of 644	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe	84
PID 3956 wrote to memory of 644	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe	84
PID 3956 wrote to memory of 644	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe	84
PID 3956 wrote to memory of 1900	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe	86
PID 3956 wrote to memory of 1900	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe	86
PID 3956 wrote to memory of 1900	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe	86
PID 644 wrote to memory of 4668	644	cmd.exe	88
PID 644 wrote to memory of 4668	644	cmd.exe	88
PID 644 wrote to memory of 4668	644	cmd.exe	88
PID 1900 wrote to memory of 1380	1900	cmd.exe	89
PID 1900 wrote to memory of 1380	1900	cmd.exe	89
PID 1900 wrote to memory of 1380	1900	cmd.exe	89
PID 3956 wrote to memory of 1768	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe	90
PID 3956 wrote to memory of 1768	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe	90
PID 3956 wrote to memory of 1768	3956	3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe	90
PID 1768 wrote to memory of 3360	1768	msdcsc.exe	91
PID 1768 wrote to memory of 3360	1768	msdcsc.exe	91
PID 1768 wrote to memory of 3360	1768	msdcsc.exe	91
PID 1768 wrote to memory of 3360	1768	msdcsc.exe	91
PID 1768 wrote to memory of 3360	1768	msdcsc.exe	91
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92
PID 3360 wrote to memory of 3384	3360	iexplore.exe	92

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Processes:

attrib.exeattrib.exe

pid	Process
4668	attrib.exe
1380	attrib.exe

C:\Users\Admin\AppData\Local\Temp\3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe
"C:\Users\Admin\AppData\Local\Temp\3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3956
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe" +s +h
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:644
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f.exe" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:4668
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1900
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:1380
- C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
  "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1768
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    - Adds Run key to start application
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3360
  - - C:\Windows\SysWOW64\notepad.exe
      notepad
      4⤵
      PID:3384

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

Replay Monitor

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Downloads

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

Filesize
658KB

MD5
3c41b88825ed5288001a0840f638bb15

SHA1
f12e5059fa029c6eea893ab2e6745922d0d89570

SHA256
3f0b1837b836c8f882db35bc5b0510b47e6c06a996148371a05b2d2b8b46ee0f

SHA512
bc4b3a9088e0fa70731573c0ac4a8bb4cff8ea68ef737010bfdc6eb0fadaad2e78dda5ca67be4830137f4c3a174d2fec9989b5a638d71d83b4299ede540f4401

Download Submit
memory/1768-61-0x00000000023A0000-0x00000000023A1000-memory.dmp

Filesize
4KB

Download
memory/1768-63-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3360-62-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3384-64-0x0000000000460000-0x0000000000461000-memory.dmp

Filesize
4KB

Download
memory/3956-0-0x00000000023F0000-0x00000000023F1000-memory.dmp

Filesize
4KB

Download
memory/3956-65-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download