darkcomet | 433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb

General

Target

433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Size

635KB
MD5

f9bb77131d91d3f78bbe5a3451774c5d
SHA1

8fc14ed6bdcee4ccc1371cd4a47a74caea3419f5
SHA256

433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb
SHA512

05d157ed6295e96b42eaff1d74cd2c59d04f8f7b5b4a6aed272e8572212f45325ae42d0b0445ce7cdb0f43f68c34437952e32b463b04a21831a90cda0e0e21aa
SSDEEP

12288:bpwABK90BOe/x9lPAYvxPQVjdsAY2XjWlnlpTMMXG91uhKIXn/bB:twAcu99lPzvxP+Bsz2XjWTRMQckkIXnl

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 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exesys.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\Drivers\\sys.exe"	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\Drivers\\sys.exe,C:\\Windows\\system32\\Drivers\\sys.exe"	sys.exe

Drops file in Drivers directory 6 IoCs

Processes:

433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exesys.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Drivers\sys.exe	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
File opened for modification	C:\Windows\SysWOW64\Drivers\	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
File created	C:\Windows\SysWOW64\Drivers\sys.exe	sys.exe
File opened for modification	C:\Windows\SysWOW64\Drivers\sys.exe	sys.exe
File opened for modification	C:\Windows\SysWOW64\Drivers\	sys.exe
File created	C:\Windows\SysWOW64\Drivers\sys.exe	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe

Executes dropped EXE 1 IoCs

Processes:

sys.exe

pid process

3552 sys.exe

pid	process
3552	sys.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:

433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exesys.exeexplorer.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	sys.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	explorer.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:

433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exesys.exeexplorer.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sys = "C:\\Windows\\system32\\Drivers\\sys.exe"	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run	sys.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sys = "C:\\Windows\\system32\\Drivers\\sys.exe"	sys.exe
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run	explorer.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

sys.exe

description pid process target process

PID 3552 set thread context of 3304 3552 sys.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

description	pid	process	target process
PID 3552 set thread context of 3304	3552	sys.exe	explorer.exe

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:

sys.exeexplorer.exe433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	sys.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	sys.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	sys.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	sys.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	explorer.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.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\Identifier	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exesys.exeexplorer.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	sys.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	explorer.exe

Modifies registry class 1 IoCs

Processes:

433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

explorer.exe

pid process

3304 explorer.exe

pid	process
3304	explorer.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exesys.exeexplorer.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeSecurityPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeTakeOwnershipPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeLoadDriverPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeSystemProfilePrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeSystemtimePrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeProfSingleProcessPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeIncBasePriorityPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeCreatePagefilePrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeBackupPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeRestorePrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeShutdownPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeDebugPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeSystemEnvironmentPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeChangeNotifyPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeRemoteShutdownPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeUndockPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeManageVolumePrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeImpersonatePrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeCreateGlobalPrivilege	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: 33	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: 34	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: 35	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: 36	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
Token: SeIncreaseQuotaPrivilege	3552	sys.exe
Token: SeSecurityPrivilege	3552	sys.exe
Token: SeTakeOwnershipPrivilege	3552	sys.exe
Token: SeLoadDriverPrivilege	3552	sys.exe
Token: SeSystemProfilePrivilege	3552	sys.exe
Token: SeSystemtimePrivilege	3552	sys.exe
Token: SeProfSingleProcessPrivilege	3552	sys.exe
Token: SeIncBasePriorityPrivilege	3552	sys.exe
Token: SeCreatePagefilePrivilege	3552	sys.exe
Token: SeBackupPrivilege	3552	sys.exe
Token: SeRestorePrivilege	3552	sys.exe
Token: SeShutdownPrivilege	3552	sys.exe
Token: SeDebugPrivilege	3552	sys.exe
Token: SeSystemEnvironmentPrivilege	3552	sys.exe
Token: SeChangeNotifyPrivilege	3552	sys.exe
Token: SeRemoteShutdownPrivilege	3552	sys.exe
Token: SeUndockPrivilege	3552	sys.exe
Token: SeManageVolumePrivilege	3552	sys.exe
Token: SeImpersonatePrivilege	3552	sys.exe
Token: SeCreateGlobalPrivilege	3552	sys.exe
Token: 33	3552	sys.exe
Token: 34	3552	sys.exe
Token: 35	3552	sys.exe
Token: 36	3552	sys.exe
Token: SeIncreaseQuotaPrivilege	3304	explorer.exe
Token: SeSecurityPrivilege	3304	explorer.exe
Token: SeTakeOwnershipPrivilege	3304	explorer.exe
Token: SeLoadDriverPrivilege	3304	explorer.exe
Token: SeSystemProfilePrivilege	3304	explorer.exe
Token: SeSystemtimePrivilege	3304	explorer.exe
Token: SeProfSingleProcessPrivilege	3304	explorer.exe
Token: SeIncBasePriorityPrivilege	3304	explorer.exe
Token: SeCreatePagefilePrivilege	3304	explorer.exe
Token: SeBackupPrivilege	3304	explorer.exe
Token: SeRestorePrivilege	3304	explorer.exe
Token: SeShutdownPrivilege	3304	explorer.exe
Token: SeDebugPrivilege	3304	explorer.exe
Token: SeSystemEnvironmentPrivilege	3304	explorer.exe
Token: SeChangeNotifyPrivilege	3304	explorer.exe
Token: SeRemoteShutdownPrivilege	3304	explorer.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exesys.exe

description	pid	process	target process
PID 4396 wrote to memory of 4720	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe	explorer.exe
PID 4396 wrote to memory of 4720	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe	explorer.exe
PID 4396 wrote to memory of 4720	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe	explorer.exe
PID 4396 wrote to memory of 3552	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe	sys.exe
PID 4396 wrote to memory of 3552	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe	sys.exe
PID 4396 wrote to memory of 3552	4396	433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe	sys.exe
PID 3552 wrote to memory of 3304	3552	sys.exe	explorer.exe
PID 3552 wrote to memory of 3304	3552	sys.exe	explorer.exe
PID 3552 wrote to memory of 3304	3552	sys.exe	explorer.exe
PID 3552 wrote to memory of 3304	3552	sys.exe	explorer.exe
PID 3552 wrote to memory of 3304	3552	sys.exe	explorer.exe

C:\Users\Admin\AppData\Local\Temp\433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe
"C:\Users\Admin\AppData\Local\Temp\433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in Drivers directory
- Checks BIOS information in registry
- Checks computer location settings
- Adds Run key to start application
- Checks processor information in registry
- Enumerates system info in registry
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4396

C:\Windows\SysWOW64\explorer.exe
"C:\Windows\SysWOW64\explorer.exe"
2⤵
PID:4720

C:\Windows\SysWOW64\Drivers\sys.exe
"C:\Windows\system32\Drivers\sys.exe"
2⤵
- Modifies WinLogon for persistence
- Drops file in Drivers directory
- Executes dropped EXE
- Checks BIOS information in registry
- 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:3552

C:\Windows\SysWOW64\explorer.exe
"C:\Windows\SysWOW64\explorer.exe"
3⤵
- Checks BIOS information in registry
- Adds Run key to start application
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:3304

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

4

T1012

System Information Discovery

5

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Windows\SysWOW64\Drivers\sys.exe
Filesize
635KB

MD5
f9bb77131d91d3f78bbe5a3451774c5d

SHA1
8fc14ed6bdcee4ccc1371cd4a47a74caea3419f5

SHA256
433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb

SHA512
05d157ed6295e96b42eaff1d74cd2c59d04f8f7b5b4a6aed272e8572212f45325ae42d0b0445ce7cdb0f43f68c34437952e32b463b04a21831a90cda0e0e21aa

Download Submit
C:\Windows\SysWOW64\drivers\sys.exe
Filesize
635KB

MD5
f9bb77131d91d3f78bbe5a3451774c5d

SHA1
8fc14ed6bdcee4ccc1371cd4a47a74caea3419f5

SHA256
433eff0c911631a3435f3eda62ae2ca1af9dba19ec2c82491718d32e75e012bb

SHA512
05d157ed6295e96b42eaff1d74cd2c59d04f8f7b5b4a6aed272e8572212f45325ae42d0b0445ce7cdb0f43f68c34437952e32b463b04a21831a90cda0e0e21aa

Download Submit
memory/3304-136-0x0000000000000000-mapping.dmp

Download
memory/3304-137-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/3304-138-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/3304-139-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/3304-140-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/3304-141-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/3552-133-0x0000000000000000-mapping.dmp

Download
memory/4720-132-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads