darkcomet | 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29

General

Target

87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Size

635KB
MD5

0d75761eaf8a4e85a54b6a46402c5ba8
SHA1

fc3f455daeb7337c95490a55ef170f14d7aac6af
SHA256

87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29
SHA512

8227d60b86ca48b2b0dcea23e8e371eb64152168637c1640f79f6e4bb818300b8c742c1586d094f135fc7eaf6a56e08f7000c278d5c445e13147857a58c17c79
SSDEEP

12288:jwABK90BOe/x9lPAYvxPQVjdsAY2XjWlnlpTMMXG91uhKIXn/D:jwAcu99lPzvxP+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:

87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.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"	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe

Executes dropped EXE 1 IoCs

Processes:

winupdate.exe

pid process

676 winupdate.exe

pid	process
676	winupdate.exe

Checks BIOS information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exeexplorer.exewinupdate.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe

Loads dropped DLL 4 IoCs

Processes:

87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exewinupdate.exe

pid process

1956 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
676 winupdate.exe
676 winupdate.exe
676 winupdate.exe

pid	process
1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
676	winupdate.exe
676	winupdate.exe
676	winupdate.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe

description	pid	process	target process
PID 1956 set thread context of 1112	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	explorer.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 12 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exeexplorer.exewinupdate.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	explorer.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	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\ProcessorNameString	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	winupdate.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

explorer.exewinupdate.exe87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exeexplorer.exewinupdate.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeSecurityPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeTakeOwnershipPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeLoadDriverPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeSystemProfilePrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeSystemtimePrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeProfSingleProcessPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeIncBasePriorityPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeCreatePagefilePrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeBackupPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeRestorePrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeShutdownPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeDebugPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeSystemEnvironmentPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeChangeNotifyPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeRemoteShutdownPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeUndockPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeManageVolumePrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeImpersonatePrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeCreateGlobalPrivilege	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: 33	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: 34	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: 35	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Token: SeIncreaseQuotaPrivilege	1112	explorer.exe
Token: SeSecurityPrivilege	1112	explorer.exe
Token: SeTakeOwnershipPrivilege	1112	explorer.exe
Token: SeLoadDriverPrivilege	1112	explorer.exe
Token: SeSystemProfilePrivilege	1112	explorer.exe
Token: SeSystemtimePrivilege	1112	explorer.exe
Token: SeProfSingleProcessPrivilege	1112	explorer.exe
Token: SeIncBasePriorityPrivilege	1112	explorer.exe
Token: SeCreatePagefilePrivilege	1112	explorer.exe
Token: SeBackupPrivilege	1112	explorer.exe
Token: SeRestorePrivilege	1112	explorer.exe
Token: SeShutdownPrivilege	1112	explorer.exe
Token: SeDebugPrivilege	1112	explorer.exe
Token: SeSystemEnvironmentPrivilege	1112	explorer.exe
Token: SeChangeNotifyPrivilege	1112	explorer.exe
Token: SeRemoteShutdownPrivilege	1112	explorer.exe
Token: SeUndockPrivilege	1112	explorer.exe
Token: SeManageVolumePrivilege	1112	explorer.exe
Token: SeImpersonatePrivilege	1112	explorer.exe
Token: SeCreateGlobalPrivilege	1112	explorer.exe
Token: 33	1112	explorer.exe
Token: 34	1112	explorer.exe
Token: 35	1112	explorer.exe
Token: SeIncreaseQuotaPrivilege	676	winupdate.exe
Token: SeSecurityPrivilege	676	winupdate.exe
Token: SeTakeOwnershipPrivilege	676	winupdate.exe
Token: SeLoadDriverPrivilege	676	winupdate.exe
Token: SeSystemProfilePrivilege	676	winupdate.exe
Token: SeSystemtimePrivilege	676	winupdate.exe
Token: SeProfSingleProcessPrivilege	676	winupdate.exe
Token: SeIncBasePriorityPrivilege	676	winupdate.exe
Token: SeCreatePagefilePrivilege	676	winupdate.exe
Token: SeBackupPrivilege	676	winupdate.exe
Token: SeRestorePrivilege	676	winupdate.exe
Token: SeShutdownPrivilege	676	winupdate.exe
Token: SeDebugPrivilege	676	winupdate.exe
Token: SeSystemEnvironmentPrivilege	676	winupdate.exe
Token: SeChangeNotifyPrivilege	676	winupdate.exe
Token: SeRemoteShutdownPrivilege	676	winupdate.exe
Token: SeUndockPrivilege	676	winupdate.exe
Token: SeManageVolumePrivilege	676	winupdate.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe

description	pid	process	target process
PID 1956 wrote to memory of 1112	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	explorer.exe
PID 1956 wrote to memory of 1112	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	explorer.exe
PID 1956 wrote to memory of 1112	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	explorer.exe
PID 1956 wrote to memory of 1112	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	explorer.exe
PID 1956 wrote to memory of 1112	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	explorer.exe
PID 1956 wrote to memory of 1112	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	explorer.exe
PID 1956 wrote to memory of 676	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	winupdate.exe
PID 1956 wrote to memory of 676	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	winupdate.exe
PID 1956 wrote to memory of 676	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	winupdate.exe
PID 1956 wrote to memory of 676	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	winupdate.exe
PID 1956 wrote to memory of 676	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	winupdate.exe
PID 1956 wrote to memory of 676	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	winupdate.exe
PID 1956 wrote to memory of 676	1956	87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe	winupdate.exe

C:\Users\Admin\AppData\Local\Temp\87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
"C:\Users\Admin\AppData\Local\Temp\87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe"
1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1956

C:\Windows\SysWOW64\explorer.exe
"C:\Windows\SysWOW64\explorer.exe"
2⤵
- Checks BIOS information in registry
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:1112

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:676

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

3

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windupdt\winupdate.exe
Filesize
635KB

MD5
0d75761eaf8a4e85a54b6a46402c5ba8

SHA1
fc3f455daeb7337c95490a55ef170f14d7aac6af

SHA256
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29

SHA512
8227d60b86ca48b2b0dcea23e8e371eb64152168637c1640f79f6e4bb818300b8c742c1586d094f135fc7eaf6a56e08f7000c278d5c445e13147857a58c17c79

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

MD5
0d75761eaf8a4e85a54b6a46402c5ba8

SHA1
fc3f455daeb7337c95490a55ef170f14d7aac6af

SHA256
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29

SHA512
8227d60b86ca48b2b0dcea23e8e371eb64152168637c1640f79f6e4bb818300b8c742c1586d094f135fc7eaf6a56e08f7000c278d5c445e13147857a58c17c79

Download Submit
\Windupdt\winupdate.exe
Filesize
635KB

MD5
0d75761eaf8a4e85a54b6a46402c5ba8

SHA1
fc3f455daeb7337c95490a55ef170f14d7aac6af

SHA256
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29

SHA512
8227d60b86ca48b2b0dcea23e8e371eb64152168637c1640f79f6e4bb818300b8c742c1586d094f135fc7eaf6a56e08f7000c278d5c445e13147857a58c17c79

Download Submit
\Windupdt\winupdate.exe
Filesize
635KB

MD5
0d75761eaf8a4e85a54b6a46402c5ba8

SHA1
fc3f455daeb7337c95490a55ef170f14d7aac6af

SHA256
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29

SHA512
8227d60b86ca48b2b0dcea23e8e371eb64152168637c1640f79f6e4bb818300b8c742c1586d094f135fc7eaf6a56e08f7000c278d5c445e13147857a58c17c79

Download Submit
\Windupdt\winupdate.exe
Filesize
635KB

MD5
0d75761eaf8a4e85a54b6a46402c5ba8

SHA1
fc3f455daeb7337c95490a55ef170f14d7aac6af

SHA256
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29

SHA512
8227d60b86ca48b2b0dcea23e8e371eb64152168637c1640f79f6e4bb818300b8c742c1586d094f135fc7eaf6a56e08f7000c278d5c445e13147857a58c17c79

Download Submit
\Windupdt\winupdate.exe
Filesize
635KB

MD5
0d75761eaf8a4e85a54b6a46402c5ba8

SHA1
fc3f455daeb7337c95490a55ef170f14d7aac6af

SHA256
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29

SHA512
8227d60b86ca48b2b0dcea23e8e371eb64152168637c1640f79f6e4bb818300b8c742c1586d094f135fc7eaf6a56e08f7000c278d5c445e13147857a58c17c79

Download Submit
memory/676-64-0x0000000000000000-mapping.dmp

Download
memory/1112-58-0x000000000048E85C-mapping.dmp

Download
memory/1112-59-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1112-61-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1112-63-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1112-57-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1112-55-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1112-71-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1956-54-0x00000000752B1000-0x00000000752B3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads