darkcomet | bffa061c4938a523859fe0e21a1dd79f85a98c751ca46153dc1199f7dde90e3a

General

Target

bffa061c4938a523859fe0e21a1dd79f85a98c751ca46153dc1199f7dde90e3a.exe
Size

1.7MB
MD5

5e653e5824314a011650dcc406b802cd
SHA1

011075687bac2bbb8c3a02f3a0f87c3bbabc09b4
SHA256

bffa061c4938a523859fe0e21a1dd79f85a98c751ca46153dc1199f7dde90e3a
SHA512

e044c714964fb8ac6aab53a3c6a305ec5e7406d351ef71b693ff70b156b1fb32d4eb83c9cfc9d8aeef4d56c0ec3594bc491abb71b8f69c7dae69ed547986f5cb
SSDEEP

24576:3fFT95vS0ErwXs8vmEHwfKss6U3RuFxDS:3tT9IbGYU3RuFx

Score

10^/10

darkcomet guest16 persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

qaz3.no-ip.info:81

Mutex

DC_MUTEX-H49DYYJ

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
NWSuYEBfbuDN
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

T1004

Modify Registry

T1112

Processes:

762.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"	762.exe

Executes dropped EXE 2 IoCs

Processes:

762.exemsdcsc.exe

pid process

4412 762.exe
920 msdcsc.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:

762.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation 762.exe

pid	process
4412	762.exe
920	msdcsc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	762.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

762.exemsdcsc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	762.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	msdcsc.exe

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

System Information Discovery
T1082
Modifies registry class 1 IoCs

Processes:

762.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ 762.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1392 PING.EXE

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	762.exe

pid	process
1392	PING.EXE

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

762.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	4412	762.exe
Token: SeSecurityPrivilege	4412	762.exe
Token: SeTakeOwnershipPrivilege	4412	762.exe
Token: SeLoadDriverPrivilege	4412	762.exe
Token: SeSystemProfilePrivilege	4412	762.exe
Token: SeSystemtimePrivilege	4412	762.exe
Token: SeProfSingleProcessPrivilege	4412	762.exe
Token: SeIncBasePriorityPrivilege	4412	762.exe
Token: SeCreatePagefilePrivilege	4412	762.exe
Token: SeBackupPrivilege	4412	762.exe
Token: SeRestorePrivilege	4412	762.exe
Token: SeShutdownPrivilege	4412	762.exe
Token: SeDebugPrivilege	4412	762.exe
Token: SeSystemEnvironmentPrivilege	4412	762.exe
Token: SeChangeNotifyPrivilege	4412	762.exe
Token: SeRemoteShutdownPrivilege	4412	762.exe
Token: SeUndockPrivilege	4412	762.exe
Token: SeManageVolumePrivilege	4412	762.exe
Token: SeImpersonatePrivilege	4412	762.exe
Token: SeCreateGlobalPrivilege	4412	762.exe
Token: 33	4412	762.exe
Token: 34	4412	762.exe
Token: 35	4412	762.exe
Token: 36	4412	762.exe
Token: SeIncreaseQuotaPrivilege	920	msdcsc.exe
Token: SeSecurityPrivilege	920	msdcsc.exe
Token: SeTakeOwnershipPrivilege	920	msdcsc.exe
Token: SeLoadDriverPrivilege	920	msdcsc.exe
Token: SeSystemProfilePrivilege	920	msdcsc.exe
Token: SeSystemtimePrivilege	920	msdcsc.exe
Token: SeProfSingleProcessPrivilege	920	msdcsc.exe
Token: SeIncBasePriorityPrivilege	920	msdcsc.exe
Token: SeCreatePagefilePrivilege	920	msdcsc.exe
Token: SeBackupPrivilege	920	msdcsc.exe
Token: SeRestorePrivilege	920	msdcsc.exe
Token: SeShutdownPrivilege	920	msdcsc.exe
Token: SeDebugPrivilege	920	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	920	msdcsc.exe
Token: SeChangeNotifyPrivilege	920	msdcsc.exe
Token: SeRemoteShutdownPrivilege	920	msdcsc.exe
Token: SeUndockPrivilege	920	msdcsc.exe
Token: SeManageVolumePrivilege	920	msdcsc.exe
Token: SeImpersonatePrivilege	920	msdcsc.exe
Token: SeCreateGlobalPrivilege	920	msdcsc.exe
Token: 33	920	msdcsc.exe
Token: 34	920	msdcsc.exe
Token: 35	920	msdcsc.exe
Token: 36	920	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

920 msdcsc.exe

pid	process
920	msdcsc.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

bffa061c4938a523859fe0e21a1dd79f85a98c751ca46153dc1199f7dde90e3a.exe762.execmd.exemsdcsc.exe

description	pid	process	target process
PID 4764 wrote to memory of 4412	4764	bffa061c4938a523859fe0e21a1dd79f85a98c751ca46153dc1199f7dde90e3a.exe	762.exe
PID 4764 wrote to memory of 4412	4764	bffa061c4938a523859fe0e21a1dd79f85a98c751ca46153dc1199f7dde90e3a.exe	762.exe
PID 4764 wrote to memory of 4412	4764	bffa061c4938a523859fe0e21a1dd79f85a98c751ca46153dc1199f7dde90e3a.exe	762.exe
PID 4412 wrote to memory of 4436	4412	762.exe	cmd.exe
PID 4412 wrote to memory of 4436	4412	762.exe	cmd.exe
PID 4412 wrote to memory of 4436	4412	762.exe	cmd.exe
PID 4436 wrote to memory of 1392	4436	cmd.exe	PING.EXE
PID 4436 wrote to memory of 1392	4436	cmd.exe	PING.EXE
PID 4436 wrote to memory of 1392	4436	cmd.exe	PING.EXE
PID 4412 wrote to memory of 920	4412	762.exe	msdcsc.exe
PID 4412 wrote to memory of 920	4412	762.exe	msdcsc.exe
PID 4412 wrote to memory of 920	4412	762.exe	msdcsc.exe
PID 920 wrote to memory of 2580	920	msdcsc.exe	iexplore.exe
PID 920 wrote to memory of 2580	920	msdcsc.exe	iexplore.exe
PID 920 wrote to memory of 2580	920	msdcsc.exe	iexplore.exe
PID 920 wrote to memory of 1724	920	msdcsc.exe	explorer.exe
PID 920 wrote to memory of 1724	920	msdcsc.exe	explorer.exe

C:\Users\Admin\AppData\Local\Temp\bffa061c4938a523859fe0e21a1dd79f85a98c751ca46153dc1199f7dde90e3a.exe
"C:\Users\Admin\AppData\Local\Temp\bffa061c4938a523859fe0e21a1dd79f85a98c751ca46153dc1199f7dde90e3a.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4764

C:\Users\Admin\AppData\Local\Temp\762.exe
C:\Users\Admin\AppData\Local\Temp\762.exe
2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4412

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 4 && del "C:\Users\Admin\AppData\Local\Temp\762.exe"
3⤵
- Suspicious use of WriteProcessMemory
PID:4436

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 4
4⤵
- Runs ping.exe
PID:1392

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:920

C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
4⤵
PID:2580

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
4⤵
PID:1724

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Remote System Discovery

1

T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\762.exe
Filesize
650KB

MD5
7a39ed01aadcbda714d825de690f75ca

SHA1
554b6d90d432648697e75bacc4b255c9c3be8230

SHA256
7ee19363c5446b3054fecbd7248c9fe6c91699fad49b3aff6b67fd386ccfb029

SHA512
e1c30de642de8abf9d43eb6cd94f1e179478d774c85976c1eedd23ebcc4ff28c415cfd7d71394c7068beb099cf44f70d2289ec7aa0df82118936b1de66d10183

Download Submit
C:\Users\Admin\AppData\Local\Temp\762.exe
Filesize
650KB

MD5
7a39ed01aadcbda714d825de690f75ca

SHA1
554b6d90d432648697e75bacc4b255c9c3be8230

SHA256
7ee19363c5446b3054fecbd7248c9fe6c91699fad49b3aff6b67fd386ccfb029

SHA512
e1c30de642de8abf9d43eb6cd94f1e179478d774c85976c1eedd23ebcc4ff28c415cfd7d71394c7068beb099cf44f70d2289ec7aa0df82118936b1de66d10183

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
650KB

MD5
7a39ed01aadcbda714d825de690f75ca

SHA1
554b6d90d432648697e75bacc4b255c9c3be8230

SHA256
7ee19363c5446b3054fecbd7248c9fe6c91699fad49b3aff6b67fd386ccfb029

SHA512
e1c30de642de8abf9d43eb6cd94f1e179478d774c85976c1eedd23ebcc4ff28c415cfd7d71394c7068beb099cf44f70d2289ec7aa0df82118936b1de66d10183

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
650KB

MD5
7a39ed01aadcbda714d825de690f75ca

SHA1
554b6d90d432648697e75bacc4b255c9c3be8230

SHA256
7ee19363c5446b3054fecbd7248c9fe6c91699fad49b3aff6b67fd386ccfb029

SHA512
e1c30de642de8abf9d43eb6cd94f1e179478d774c85976c1eedd23ebcc4ff28c415cfd7d71394c7068beb099cf44f70d2289ec7aa0df82118936b1de66d10183

Download Submit
memory/920-137-0x0000000000000000-mapping.dmp

Download
memory/1392-136-0x0000000000000000-mapping.dmp

Download
memory/1724-140-0x0000000000000000-mapping.dmp

Download
memory/4412-132-0x0000000000000000-mapping.dmp

Download
memory/4436-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads