darkcomet | 69366a4a73f7d9fd02ebbfdc35e504b8ec6203571d3f4b99f94a7a25e994d53d

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22-12-2024 23:24

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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 discovery 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
Darkcomet family
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
844	attrib.exe
4944	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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

Executes dropped EXE 1 IoCs

pid	Process
4136	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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\runddl32.exe"	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\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

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	runddl32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe

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
4136	runddl32.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSecurityPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeTakeOwnershipPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeLoadDriverPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemProfilePrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemtimePrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeProfSingleProcessPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeIncBasePriorityPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeCreatePagefilePrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeBackupPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeRestorePrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeShutdownPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeDebugPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemEnvironmentPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeChangeNotifyPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeRemoteShutdownPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeUndockPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeManageVolumePrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeImpersonatePrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeCreateGlobalPrivilege	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 33	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 34	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 35	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 36	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeIncreaseQuotaPrivilege	4136	runddl32.exe
Token: SeSecurityPrivilege	4136	runddl32.exe
Token: SeTakeOwnershipPrivilege	4136	runddl32.exe
Token: SeLoadDriverPrivilege	4136	runddl32.exe
Token: SeSystemProfilePrivilege	4136	runddl32.exe
Token: SeSystemtimePrivilege	4136	runddl32.exe
Token: SeProfSingleProcessPrivilege	4136	runddl32.exe
Token: SeIncBasePriorityPrivilege	4136	runddl32.exe
Token: SeCreatePagefilePrivilege	4136	runddl32.exe
Token: SeBackupPrivilege	4136	runddl32.exe
Token: SeRestorePrivilege	4136	runddl32.exe
Token: SeShutdownPrivilege	4136	runddl32.exe
Token: SeDebugPrivilege	4136	runddl32.exe
Token: SeSystemEnvironmentPrivilege	4136	runddl32.exe
Token: SeChangeNotifyPrivilege	4136	runddl32.exe
Token: SeRemoteShutdownPrivilege	4136	runddl32.exe
Token: SeUndockPrivilege	4136	runddl32.exe
Token: SeManageVolumePrivilege	4136	runddl32.exe
Token: SeImpersonatePrivilege	4136	runddl32.exe
Token: SeCreateGlobalPrivilege	4136	runddl32.exe
Token: 33	4136	runddl32.exe
Token: 34	4136	runddl32.exe
Token: 35	4136	runddl32.exe
Token: 36	4136	runddl32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4136	runddl32.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 4780 wrote to memory of 780	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	83
PID 4780 wrote to memory of 780	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	83
PID 4780 wrote to memory of 780	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	83
PID 4780 wrote to memory of 3740	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	84
PID 4780 wrote to memory of 3740	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	84
PID 4780 wrote to memory of 3740	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	84
PID 780 wrote to memory of 844	780	cmd.exe	87
PID 780 wrote to memory of 844	780	cmd.exe	87
PID 780 wrote to memory of 844	780	cmd.exe	87
PID 3740 wrote to memory of 4944	3740	cmd.exe	88
PID 3740 wrote to memory of 4944	3740	cmd.exe	88
PID 3740 wrote to memory of 4944	3740	cmd.exe	88
PID 4780 wrote to memory of 4136	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	89
PID 4780 wrote to memory of 4136	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	89
PID 4780 wrote to memory of 4136	4780	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	89
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90
PID 4136 wrote to memory of 1484	4136	runddl32.exe	90

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
844	attrib.exe
4944	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
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4780
- 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⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:780
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\lab_samples\6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:844
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\lab_samples" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3740
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\lab_samples" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:4944
- 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
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4136
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1484

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

System Location Discovery

T1614

System Language Discovery

T1614.001

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/1484-63-0x00000000005B0000-0x00000000005B1000-memory.dmp

Filesize
4KB

Download
memory/4136-70-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-71-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-79-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-65-0x0000000002160000-0x0000000002161000-memory.dmp

Filesize
4KB

Download
memory/4136-66-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-67-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-68-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-69-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-78-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-62-0x0000000002160000-0x0000000002161000-memory.dmp

Filesize
4KB

Download
memory/4136-72-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-73-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-74-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-75-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-76-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4136-77-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4780-0-0x00000000022B0000-0x00000000022B1000-memory.dmp

Filesize
4KB

Download
memory/4780-64-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads