darkcomet | 628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0

General

Target

628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Size

350KB
MD5

419bea8711945b4185825587a2e5b73d
SHA1

f8f02d52acf2b828148a11c8e34526b08c5433a7
SHA256

628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0
SHA512

5c5be665eab48de558005861a15eade944c8eca3738381d3e054a074224dfd50f0b1da5805f0da8691dae1c5578aefb6c9cb8a4af115759205aa41062412c5ff
SSDEEP

6144:YD7cY2fgssM7Wirg9KXylmRiL+QMeC/i6isqX7UovnONztByipwxZFY05LLTMdW+:Yl8E4w5huat7UovONzbXwS0dMd0QZh9u

Score

10^/10

darkcomet windows persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Windows

C2

darkcomet30.zapto.org:1604

192.168.1.4:1604

Mutex

DC_MUTEX-VYWT48W

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
Qmcc37KssvVE
install
true
offline_keylogger
true
persistence
false
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

T1004

Modify Registry

T1112

Processes:

628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.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"	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

2420 msdcsc.exe

pid	process
2420	msdcsc.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/4040-132-0x0000000000400000-0x00000000004EB000-memory.dmp	upx
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe	upx
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe	upx
behavioral2/memory/4040-136-0x0000000000400000-0x00000000004EB000-memory.dmp	upx
behavioral2/memory/2420-137-0x0000000000400000-0x00000000004EB000-memory.dmp	upx
behavioral2/memory/2420-138-0x0000000000400000-0x00000000004EB000-memory.dmp	upx

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:

628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeSecurityPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeTakeOwnershipPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeLoadDriverPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeSystemProfilePrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeSystemtimePrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeProfSingleProcessPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeIncBasePriorityPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeCreatePagefilePrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeBackupPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeRestorePrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeShutdownPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeDebugPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeSystemEnvironmentPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeChangeNotifyPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeRemoteShutdownPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeUndockPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeManageVolumePrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeImpersonatePrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeCreateGlobalPrivilege	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: 33	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: 34	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: 35	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: 36	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
Token: SeIncreaseQuotaPrivilege	2420	msdcsc.exe
Token: SeSecurityPrivilege	2420	msdcsc.exe
Token: SeTakeOwnershipPrivilege	2420	msdcsc.exe
Token: SeLoadDriverPrivilege	2420	msdcsc.exe
Token: SeSystemProfilePrivilege	2420	msdcsc.exe
Token: SeSystemtimePrivilege	2420	msdcsc.exe
Token: SeProfSingleProcessPrivilege	2420	msdcsc.exe
Token: SeIncBasePriorityPrivilege	2420	msdcsc.exe
Token: SeCreatePagefilePrivilege	2420	msdcsc.exe
Token: SeBackupPrivilege	2420	msdcsc.exe
Token: SeRestorePrivilege	2420	msdcsc.exe
Token: SeShutdownPrivilege	2420	msdcsc.exe
Token: SeDebugPrivilege	2420	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	2420	msdcsc.exe
Token: SeChangeNotifyPrivilege	2420	msdcsc.exe
Token: SeRemoteShutdownPrivilege	2420	msdcsc.exe
Token: SeUndockPrivilege	2420	msdcsc.exe
Token: SeManageVolumePrivilege	2420	msdcsc.exe
Token: SeImpersonatePrivilege	2420	msdcsc.exe
Token: SeCreateGlobalPrivilege	2420	msdcsc.exe
Token: 33	2420	msdcsc.exe
Token: 34	2420	msdcsc.exe
Token: 35	2420	msdcsc.exe
Token: 36	2420	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

2420 msdcsc.exe

pid	process
2420	msdcsc.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe

description	pid	process	target process
PID 4040 wrote to memory of 2420	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe	msdcsc.exe
PID 4040 wrote to memory of 2420	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe	msdcsc.exe
PID 4040 wrote to memory of 2420	4040	628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe	msdcsc.exe

C:\Users\Admin\AppData\Local\Temp\628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe
"C:\Users\Admin\AppData\Local\Temp\628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4040

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2420

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
350KB

MD5
419bea8711945b4185825587a2e5b73d

SHA1
f8f02d52acf2b828148a11c8e34526b08c5433a7

SHA256
628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0

SHA512
5c5be665eab48de558005861a15eade944c8eca3738381d3e054a074224dfd50f0b1da5805f0da8691dae1c5578aefb6c9cb8a4af115759205aa41062412c5ff

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

Filesize
350KB

MD5
419bea8711945b4185825587a2e5b73d

SHA1
f8f02d52acf2b828148a11c8e34526b08c5433a7

SHA256
628c23d063f84d1985f9b51a8841ccf9988bc2a31f1b8c6993f255b887ad6ff0

SHA512
5c5be665eab48de558005861a15eade944c8eca3738381d3e054a074224dfd50f0b1da5805f0da8691dae1c5578aefb6c9cb8a4af115759205aa41062412c5ff

Download Submit
memory/2420-133-0x0000000000000000-mapping.dmp

Download
memory/2420-137-0x0000000000400000-0x00000000004EB000-memory.dmp

Filesize
940KB

Download
memory/2420-138-0x0000000000400000-0x00000000004EB000-memory.dmp

Filesize
940KB

Download
memory/4040-132-0x0000000000400000-0x00000000004EB000-memory.dmp

Filesize
940KB

Download
memory/4040-136-0x0000000000400000-0x00000000004EB000-memory.dmp

Filesize
940KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads