darkcomet | a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49

General

Target

a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Size

635KB
MD5

cdaa24aa755ae64fe56c6d3bef8bff6d
SHA1

477421a230de751f5e4b4a16671c603683b7d117
SHA256

a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49
SHA512

01043a4097194ebefb90438121da22d2af1bf46934aeffaac7c51ac56404ccfd2dcd4d5ed8236171406b7586aa4d80a57c44b1a7f58e4bf891c141a07c580e96
SSDEEP

12288:XpwABK90BOe/x9lPAYvxPQVjdsAY2XjWlnlpTMMXG91uhKIXn/D:5wAcu99lPzvxP+Bsz2XjWTRMQckkIXn7

Score

10^/10

darkcomet persistence rat trojan

Malware Config

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:

a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe"	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe

Executes dropped EXE 1 IoCs

Processes:

winupdate.exe

pid process

1520 winupdate.exe

pid	process
1520	winupdate.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exewinupdate.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe

Loads dropped DLL 4 IoCs

Processes:

a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exewinupdate.exe

pid process

836 a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
1520 winupdate.exe
1520 winupdate.exe
1520 winupdate.exe

pid	process
836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
1520	winupdate.exe
1520	winupdate.exe
1520	winupdate.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 8 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exewinupdate.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	winupdate.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exewinupdate.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

Processes:

a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exewinupdate.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeSecurityPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeTakeOwnershipPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeLoadDriverPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeSystemProfilePrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeSystemtimePrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeProfSingleProcessPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeIncBasePriorityPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeCreatePagefilePrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeBackupPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeRestorePrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeShutdownPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeDebugPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeSystemEnvironmentPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeChangeNotifyPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeRemoteShutdownPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeUndockPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeManageVolumePrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeImpersonatePrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeCreateGlobalPrivilege	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: 33	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: 34	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: 35	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
Token: SeIncreaseQuotaPrivilege	1520	winupdate.exe
Token: SeSecurityPrivilege	1520	winupdate.exe
Token: SeTakeOwnershipPrivilege	1520	winupdate.exe
Token: SeLoadDriverPrivilege	1520	winupdate.exe
Token: SeSystemProfilePrivilege	1520	winupdate.exe
Token: SeSystemtimePrivilege	1520	winupdate.exe
Token: SeProfSingleProcessPrivilege	1520	winupdate.exe
Token: SeIncBasePriorityPrivilege	1520	winupdate.exe
Token: SeCreatePagefilePrivilege	1520	winupdate.exe
Token: SeBackupPrivilege	1520	winupdate.exe
Token: SeRestorePrivilege	1520	winupdate.exe
Token: SeShutdownPrivilege	1520	winupdate.exe
Token: SeDebugPrivilege	1520	winupdate.exe
Token: SeSystemEnvironmentPrivilege	1520	winupdate.exe
Token: SeChangeNotifyPrivilege	1520	winupdate.exe
Token: SeRemoteShutdownPrivilege	1520	winupdate.exe
Token: SeUndockPrivilege	1520	winupdate.exe
Token: SeManageVolumePrivilege	1520	winupdate.exe
Token: SeImpersonatePrivilege	1520	winupdate.exe
Token: SeCreateGlobalPrivilege	1520	winupdate.exe
Token: 33	1520	winupdate.exe
Token: 34	1520	winupdate.exe
Token: 35	1520	winupdate.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe

description	pid	process	target process
PID 836 wrote to memory of 1016	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe	explorer.exe
PID 836 wrote to memory of 1016	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe	explorer.exe
PID 836 wrote to memory of 1016	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe	explorer.exe
PID 836 wrote to memory of 1016	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe	explorer.exe
PID 836 wrote to memory of 1520	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe	winupdate.exe
PID 836 wrote to memory of 1520	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe	winupdate.exe
PID 836 wrote to memory of 1520	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe	winupdate.exe
PID 836 wrote to memory of 1520	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe	winupdate.exe
PID 836 wrote to memory of 1520	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe	winupdate.exe
PID 836 wrote to memory of 1520	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe	winupdate.exe
PID 836 wrote to memory of 1520	836	a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe	winupdate.exe

C:\Users\Admin\AppData\Local\Temp\a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe
"C:\Users\Admin\AppData\Local\Temp\a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49.exe"
1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Loads dropped DLL
- Adds Run key to start application
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:836

C:\Windows\SysWOW64\explorer.exe
"C:\Windows\SysWOW64\explorer.exe"
2⤵
PID:1016

C:\Windupdt\winupdate.exe
"C:\Windupdt\winupdate.exe"
2⤵
- Executes dropped EXE
- Checks BIOS information in registry
- Loads dropped DLL
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:1520

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

3

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Windupdt\winupdate.exe
Filesize
635KB

MD5
cdaa24aa755ae64fe56c6d3bef8bff6d

SHA1
477421a230de751f5e4b4a16671c603683b7d117

SHA256
a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49

SHA512
01043a4097194ebefb90438121da22d2af1bf46934aeffaac7c51ac56404ccfd2dcd4d5ed8236171406b7586aa4d80a57c44b1a7f58e4bf891c141a07c580e96

Download Submit
C:\Windupdt\winupdate.exe
Filesize
635KB

MD5
cdaa24aa755ae64fe56c6d3bef8bff6d

SHA1
477421a230de751f5e4b4a16671c603683b7d117

SHA256
a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49

SHA512
01043a4097194ebefb90438121da22d2af1bf46934aeffaac7c51ac56404ccfd2dcd4d5ed8236171406b7586aa4d80a57c44b1a7f58e4bf891c141a07c580e96

Download Submit
\Windupdt\winupdate.exe
Filesize
635KB

MD5
cdaa24aa755ae64fe56c6d3bef8bff6d

SHA1
477421a230de751f5e4b4a16671c603683b7d117

SHA256
a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49

SHA512
01043a4097194ebefb90438121da22d2af1bf46934aeffaac7c51ac56404ccfd2dcd4d5ed8236171406b7586aa4d80a57c44b1a7f58e4bf891c141a07c580e96

Download Submit
\Windupdt\winupdate.exe
Filesize
635KB

MD5
cdaa24aa755ae64fe56c6d3bef8bff6d

SHA1
477421a230de751f5e4b4a16671c603683b7d117

SHA256
a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49

SHA512
01043a4097194ebefb90438121da22d2af1bf46934aeffaac7c51ac56404ccfd2dcd4d5ed8236171406b7586aa4d80a57c44b1a7f58e4bf891c141a07c580e96

Download Submit
\Windupdt\winupdate.exe
Filesize
635KB

MD5
cdaa24aa755ae64fe56c6d3bef8bff6d

SHA1
477421a230de751f5e4b4a16671c603683b7d117

SHA256
a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49

SHA512
01043a4097194ebefb90438121da22d2af1bf46934aeffaac7c51ac56404ccfd2dcd4d5ed8236171406b7586aa4d80a57c44b1a7f58e4bf891c141a07c580e96

Download Submit
\Windupdt\winupdate.exe
Filesize
635KB

MD5
cdaa24aa755ae64fe56c6d3bef8bff6d

SHA1
477421a230de751f5e4b4a16671c603683b7d117

SHA256
a01f1a0789beee9f0ab471734ac420445d1eaae94b259f6d430bef9c8f26fe49

SHA512
01043a4097194ebefb90438121da22d2af1bf46934aeffaac7c51ac56404ccfd2dcd4d5ed8236171406b7586aa4d80a57c44b1a7f58e4bf891c141a07c580e96

Download Submit
memory/836-54-0x0000000075C81000-0x0000000075C83000-memory.dmp

Filesize
8KB

Download
memory/1520-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads