darkcomet | 47b6a8be6bb6c251fdc1f69df2ce96e102fde2b1377b56fa7f5a6f0a4e57bd54

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
01/07/2024, 18:08

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General

Target

1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
Size

2.3MB
MD5

1bfdbf456c611c379a667b3900acdc63
SHA1

6f14e00b5f156d1bfdcbe9c499210d8d0bd053ea
SHA256

47b6a8be6bb6c251fdc1f69df2ce96e102fde2b1377b56fa7f5a6f0a4e57bd54
SHA512

0fd918624872f5c013a86c0651fad086c69f23838464f45efd50c8a885fb680f84d1ba0e31a1f73d296158ab10b1bd0864db002417815ffa6e47e386e4fd537d
SSDEEP

49152:EudbQ1XJ6XOWhNjW2qmaVogliPJmuoqJR0cPB9W5kN7Yjo:xd9XOWK9ygliRPoq1fWmN7Yjo

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

T1547.004

Modify Registry

T1112

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	%tmp%.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation	%tmp%.exe

Executes dropped EXE 2 IoCs

pid	Process
3708	%tmp%.exe
1956	winupdate.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	%tmp%.exe

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

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

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

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	%tmp%.exe

Modifies registry class 1 IoCs

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

Suspicious behavior: EnumeratesProcesses 18 IoCs

pid	Process
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1956	winupdate.exe

Suspicious use of AdjustPrivilegeToken 49 IoCs

description	pid	Process
Token: SeDebugPrivilege	2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	3708	%tmp%.exe
Token: SeSecurityPrivilege	3708	%tmp%.exe
Token: SeTakeOwnershipPrivilege	3708	%tmp%.exe
Token: SeLoadDriverPrivilege	3708	%tmp%.exe
Token: SeSystemProfilePrivilege	3708	%tmp%.exe
Token: SeSystemtimePrivilege	3708	%tmp%.exe
Token: SeProfSingleProcessPrivilege	3708	%tmp%.exe
Token: SeIncBasePriorityPrivilege	3708	%tmp%.exe
Token: SeCreatePagefilePrivilege	3708	%tmp%.exe
Token: SeBackupPrivilege	3708	%tmp%.exe
Token: SeRestorePrivilege	3708	%tmp%.exe
Token: SeShutdownPrivilege	3708	%tmp%.exe
Token: SeDebugPrivilege	3708	%tmp%.exe
Token: SeSystemEnvironmentPrivilege	3708	%tmp%.exe
Token: SeChangeNotifyPrivilege	3708	%tmp%.exe
Token: SeRemoteShutdownPrivilege	3708	%tmp%.exe
Token: SeUndockPrivilege	3708	%tmp%.exe
Token: SeManageVolumePrivilege	3708	%tmp%.exe
Token: SeImpersonatePrivilege	3708	%tmp%.exe
Token: SeCreateGlobalPrivilege	3708	%tmp%.exe
Token: 33	3708	%tmp%.exe
Token: 34	3708	%tmp%.exe
Token: 35	3708	%tmp%.exe
Token: 36	3708	%tmp%.exe
Token: SeIncreaseQuotaPrivilege	1956	winupdate.exe
Token: SeSecurityPrivilege	1956	winupdate.exe
Token: SeTakeOwnershipPrivilege	1956	winupdate.exe
Token: SeLoadDriverPrivilege	1956	winupdate.exe
Token: SeSystemProfilePrivilege	1956	winupdate.exe
Token: SeSystemtimePrivilege	1956	winupdate.exe
Token: SeProfSingleProcessPrivilege	1956	winupdate.exe
Token: SeIncBasePriorityPrivilege	1956	winupdate.exe
Token: SeCreatePagefilePrivilege	1956	winupdate.exe
Token: SeBackupPrivilege	1956	winupdate.exe
Token: SeRestorePrivilege	1956	winupdate.exe
Token: SeShutdownPrivilege	1956	winupdate.exe
Token: SeDebugPrivilege	1956	winupdate.exe
Token: SeSystemEnvironmentPrivilege	1956	winupdate.exe
Token: SeChangeNotifyPrivilege	1956	winupdate.exe
Token: SeRemoteShutdownPrivilege	1956	winupdate.exe
Token: SeUndockPrivilege	1956	winupdate.exe
Token: SeManageVolumePrivilege	1956	winupdate.exe
Token: SeImpersonatePrivilege	1956	winupdate.exe
Token: SeCreateGlobalPrivilege	1956	winupdate.exe
Token: 33	1956	winupdate.exe
Token: 34	1956	winupdate.exe
Token: 35	1956	winupdate.exe
Token: 36	1956	winupdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2708 wrote to memory of 3708	2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe	99
PID 2708 wrote to memory of 3708	2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe	99
PID 2708 wrote to memory of 3708	2708	1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe	99
PID 3708 wrote to memory of 1956	3708	%tmp%.exe	103
PID 3708 wrote to memory of 1956	3708	%tmp%.exe	103
PID 3708 wrote to memory of 1956	3708	%tmp%.exe	103

C:\Users\Admin\AppData\Local\Temp\1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\1bfdbf456c611c379a667b3900acdc63_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2708
- C:\Users\Admin\AppData\Local\Temp\%tmp%.exe
  "C:\Users\Admin\AppData\Local\Temp\%tmp%.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Executes dropped EXE
  - 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:3708
- - C:\Windupdt\winupdate.exe
    "C:\Windupdt\winupdate.exe"
    3⤵
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:1956

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4544,i,8660989700097327804,17931739887231169645,262144 --variations-seed-version --mojo-platform-channel-handle=4256 /prefetch:8
1⤵
PID:2664

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\%tmp%.exe

Filesize
812KB

MD5
712e5d085ff3cea9e52a6f5145839952

SHA1
0926d754dbf29ca31cbd8dd0aaa29b4e989bef2c

SHA256
1450db183a44af494827b61e91c5b3860e711644703ff0c63d9ec0f48c7c93d0

SHA512
57d49c3fcd29b1afd23f11ba23684676572045f1f39315d5362078fc06ada1a95a2b3a03fb3eebaf5c74e2bbb56fa86401d260784308b5a3e6056cae1a5d1554

Download Submit
memory/1956-59-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-58-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-63-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-54-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-62-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-61-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-51-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-52-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-60-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-55-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-53-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-56-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1956-57-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/2708-14-0x0000000074E40000-0x00000000753F1000-memory.dmp

Filesize
5.7MB

Download
memory/2708-0-0x0000000074E42000-0x0000000074E43000-memory.dmp

Filesize
4KB

Download
memory/2708-2-0x0000000074E40000-0x00000000753F1000-memory.dmp

Filesize
5.7MB

Download
memory/2708-1-0x0000000074E40000-0x00000000753F1000-memory.dmp

Filesize
5.7MB

Download
memory/3708-50-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/3708-15-0x00000000022C0000-0x00000000022C1000-memory.dmp

Filesize
4KB

Download