darkcomet | 596263884d5474c2d3bb01238718eb30ce2c8539c99f66fa26b92171c6786c26

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
07-07-2024 10:56

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General

Target

lab_samples/6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Size

658KB
MD5

f6351da84168d40fae8da0c156fbab0f
SHA1

1a2283c85bc5c655f5f2f77f27ec3a9412e8db7e
SHA256

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363
SHA512

9948e83f004bb6d0edf14626660365e469dec444128e820f82066e73177f5de109d048fe226a9cbe95cfc6a99a9d4c501ab3f3900aa2e3677434f03d52694607
SSDEEP

12288:e9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hn:qZ1xuVVjfFoynPaVBUR8f+kN10EBV

Score

10^/10

darkcomet guest16 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

test213.no-ip.info:1604

Mutex

DC_MUTEX-KHNEW06

Attributes

InstallPath
MSDCSC\runddl32.exe
gencode
F6FE8i2BxCpu
install
true
offline_keylogger
true
persistence
true
reg_key
MicroUpdate

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:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\runddl32.exe"	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.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

pid	Process
5072	attrib.exe
2196	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-1-5-21-587429654-1855694383-2268796072-1000\Control Panel\International\Geo\Nation	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

Executes dropped EXE 1 IoCs

pid	Process
1996	runddl32.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-1-5-21-587429654-1855694383-2268796072-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\runddl32.exe"	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-587429654-1855694383-2268796072-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\runddl32.exe"	runddl32.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1996	runddl32.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSecurityPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeTakeOwnershipPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeLoadDriverPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemProfilePrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemtimePrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeProfSingleProcessPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeIncBasePriorityPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeCreatePagefilePrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeBackupPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeRestorePrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeShutdownPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeDebugPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemEnvironmentPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeChangeNotifyPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeRemoteShutdownPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeUndockPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeManageVolumePrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeImpersonatePrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeCreateGlobalPrivilege	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 33	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 34	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 35	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 36	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeIncreaseQuotaPrivilege	1996	runddl32.exe
Token: SeSecurityPrivilege	1996	runddl32.exe
Token: SeTakeOwnershipPrivilege	1996	runddl32.exe
Token: SeLoadDriverPrivilege	1996	runddl32.exe
Token: SeSystemProfilePrivilege	1996	runddl32.exe
Token: SeSystemtimePrivilege	1996	runddl32.exe
Token: SeProfSingleProcessPrivilege	1996	runddl32.exe
Token: SeIncBasePriorityPrivilege	1996	runddl32.exe
Token: SeCreatePagefilePrivilege	1996	runddl32.exe
Token: SeBackupPrivilege	1996	runddl32.exe
Token: SeRestorePrivilege	1996	runddl32.exe
Token: SeShutdownPrivilege	1996	runddl32.exe
Token: SeDebugPrivilege	1996	runddl32.exe
Token: SeSystemEnvironmentPrivilege	1996	runddl32.exe
Token: SeChangeNotifyPrivilege	1996	runddl32.exe
Token: SeRemoteShutdownPrivilege	1996	runddl32.exe
Token: SeUndockPrivilege	1996	runddl32.exe
Token: SeManageVolumePrivilege	1996	runddl32.exe
Token: SeImpersonatePrivilege	1996	runddl32.exe
Token: SeCreateGlobalPrivilege	1996	runddl32.exe
Token: 33	1996	runddl32.exe
Token: 34	1996	runddl32.exe
Token: 35	1996	runddl32.exe
Token: 36	1996	runddl32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1996	runddl32.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 2948 wrote to memory of 1304	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	85
PID 2948 wrote to memory of 1304	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	85
PID 2948 wrote to memory of 1304	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	85
PID 2948 wrote to memory of 116	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	86
PID 2948 wrote to memory of 116	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	86
PID 2948 wrote to memory of 116	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	86
PID 116 wrote to memory of 5072	116	cmd.exe	89
PID 116 wrote to memory of 5072	116	cmd.exe	89
PID 116 wrote to memory of 5072	116	cmd.exe	89
PID 1304 wrote to memory of 2196	1304	cmd.exe	90
PID 1304 wrote to memory of 2196	1304	cmd.exe	90
PID 1304 wrote to memory of 2196	1304	cmd.exe	90
PID 2948 wrote to memory of 1996	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	91
PID 2948 wrote to memory of 1996	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	91
PID 2948 wrote to memory of 1996	2948	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	91
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92
PID 1996 wrote to memory of 4540	1996	runddl32.exe	92

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
5072	attrib.exe
2196	attrib.exe

C:\Users\Admin\AppData\Local\Temp\lab_samples\6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
"C:\Users\Admin\AppData\Local\Temp\lab_samples\6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.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:2948
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\lab_samples\6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe" +s +h
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1304
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\lab_samples\6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:2196
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\lab_samples" +s +h
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:116
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\lab_samples" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:5072
- C:\Users\Admin\AppData\Local\Temp\MSDCSC\runddl32.exe
  "C:\Users\Admin\AppData\Local\Temp\MSDCSC\runddl32.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1996
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    PID:4540

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

C:\Users\Admin\AppData\Local\Temp\MSDCSC\runddl32.exe

Filesize
658KB

MD5
f6351da84168d40fae8da0c156fbab0f

SHA1
1a2283c85bc5c655f5f2f77f27ec3a9412e8db7e

SHA256
6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363

SHA512
9948e83f004bb6d0edf14626660365e469dec444128e820f82066e73177f5de109d048fe226a9cbe95cfc6a99a9d4c501ab3f3900aa2e3677434f03d52694607

Download Submit
memory/1996-73-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-66-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-70-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-78-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-71-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-67-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-68-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-72-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-77-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-63-0x0000000002170000-0x0000000002171000-memory.dmp

Filesize
4KB

Download
memory/1996-69-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-76-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-74-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1996-75-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2948-0-0x00000000022C0000-0x00000000022C1000-memory.dmp

Filesize
4KB

Download
memory/2948-62-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4540-64-0x0000000001300000-0x0000000001301000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads