darkcomet | 596263884d5474c2d3bb01238718eb30ce2c8539c99f66fa26b92171c6786c26

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
28-06-2024 11:22

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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

Processes:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

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

Processes:

attrib.exeattrib.exe

pid process

2572 attrib.exe
3544 attrib.exe

pid	process
2572	attrib.exe
3544	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:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

Executes dropped EXE 1 IoCs

Processes:

runddl32.exe

pid process

3100 runddl32.exe

pid	process
3100	runddl32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exerunddl32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\runddl32.exe"	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\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

Processes:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

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

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

runddl32.exe

pid process

3100 runddl32.exe

pid	process
3100	runddl32.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exerunddl32.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSecurityPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeTakeOwnershipPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeLoadDriverPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemProfilePrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemtimePrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeProfSingleProcessPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeIncBasePriorityPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeCreatePagefilePrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeBackupPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeRestorePrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeShutdownPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeDebugPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemEnvironmentPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeChangeNotifyPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeRemoteShutdownPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeUndockPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeManageVolumePrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeImpersonatePrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeCreateGlobalPrivilege	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 33	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 34	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 35	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 36	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeIncreaseQuotaPrivilege	3100	runddl32.exe
Token: SeSecurityPrivilege	3100	runddl32.exe
Token: SeTakeOwnershipPrivilege	3100	runddl32.exe
Token: SeLoadDriverPrivilege	3100	runddl32.exe
Token: SeSystemProfilePrivilege	3100	runddl32.exe
Token: SeSystemtimePrivilege	3100	runddl32.exe
Token: SeProfSingleProcessPrivilege	3100	runddl32.exe
Token: SeIncBasePriorityPrivilege	3100	runddl32.exe
Token: SeCreatePagefilePrivilege	3100	runddl32.exe
Token: SeBackupPrivilege	3100	runddl32.exe
Token: SeRestorePrivilege	3100	runddl32.exe
Token: SeShutdownPrivilege	3100	runddl32.exe
Token: SeDebugPrivilege	3100	runddl32.exe
Token: SeSystemEnvironmentPrivilege	3100	runddl32.exe
Token: SeChangeNotifyPrivilege	3100	runddl32.exe
Token: SeRemoteShutdownPrivilege	3100	runddl32.exe
Token: SeUndockPrivilege	3100	runddl32.exe
Token: SeManageVolumePrivilege	3100	runddl32.exe
Token: SeImpersonatePrivilege	3100	runddl32.exe
Token: SeCreateGlobalPrivilege	3100	runddl32.exe
Token: 33	3100	runddl32.exe
Token: 34	3100	runddl32.exe
Token: 35	3100	runddl32.exe
Token: 36	3100	runddl32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

runddl32.exe

pid process

3100 runddl32.exe

pid	process
3100	runddl32.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.execmd.execmd.exerunddl32.exe

description	pid	process	target process
PID 3300 wrote to memory of 4808	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 3300 wrote to memory of 4808	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 3300 wrote to memory of 4808	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 3300 wrote to memory of 1180	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 3300 wrote to memory of 1180	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 3300 wrote to memory of 1180	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 1180 wrote to memory of 2572	1180	cmd.exe	attrib.exe
PID 1180 wrote to memory of 2572	1180	cmd.exe	attrib.exe
PID 1180 wrote to memory of 2572	1180	cmd.exe	attrib.exe
PID 4808 wrote to memory of 3544	4808	cmd.exe	attrib.exe
PID 4808 wrote to memory of 3544	4808	cmd.exe	attrib.exe
PID 4808 wrote to memory of 3544	4808	cmd.exe	attrib.exe
PID 3300 wrote to memory of 3100	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	runddl32.exe
PID 3300 wrote to memory of 3100	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	runddl32.exe
PID 3300 wrote to memory of 3100	3300	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	runddl32.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe
PID 3100 wrote to memory of 116	3100	runddl32.exe	notepad.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exeattrib.exe

pid process

2572 attrib.exe
3544 attrib.exe

pid	process
2572	attrib.exe
3544	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:3300

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:4808

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:3544

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:1180

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:2572

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:3100

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:116

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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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/116-63-0x0000000000B60000-0x0000000000B61000-memory.dmp

Filesize
4KB

Download
memory/3100-70-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-71-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-79-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-65-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-66-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-67-0x0000000002180000-0x0000000002181000-memory.dmp

Filesize
4KB

Download
memory/3100-68-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-69-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-78-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-62-0x0000000002180000-0x0000000002181000-memory.dmp

Filesize
4KB

Download
memory/3100-72-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-73-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-74-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-75-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-76-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3100-77-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3300-0-0x0000000002170000-0x0000000002171000-memory.dmp

Filesize
4KB

Download
memory/3300-64-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download