darkcomet | 6a4b915b14136d4c5ccc1a606c5d8281a7c217c261e0215af759d8d7ea121de3

Analysis

max time kernel
90s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04-11-2024 06:49

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General

Target

8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Size

1.0MB
MD5

8fbd83dc816c94550613d3224ff57280
SHA1

aecf122978d42252be280f2fc7efde085f7defd9
SHA256

6a4b915b14136d4c5ccc1a606c5d8281a7c217c261e0215af759d8d7ea121de3
SHA512

93ed5d86e31c1fd98e847c1f0c222c2cdc3c09d8cd222092010b23713134c60dd813aea0275c46b237bf807839576b2bd43db0cdb654f2eae10e735f8e5c7cd3
SSDEEP

24576:A5ifoSQrNRWA2+h7UcwvrrULxWuiOEn5klx4qNRX:DZQ732+hAJrUWFOs2lpXX

Score

10^/10

darkcomet discovery persistence rat trojan upx

Malware Config

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
Darkcomet family
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"	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe

Checks BIOS information in registry 2 TTPs 4 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\SystemBiosVersion	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe

Executes dropped EXE 1 IoCs

pid	Process
2688	winupdate.exe

Loads dropped DLL 3 IoCs

pid	Process
2688	winupdate.exe
2688	winupdate.exe
2688	winupdate.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windupdt\\winupdate.exe"	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windupdt\\winupdate.exe"	winupdate.exe

UPX packed file 11 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1920-3-0x00000000003E0000-0x00000000003F1000-memory.dmp	upx
behavioral1/memory/1920-2-0x00000000003E0000-0x00000000003F1000-memory.dmp	upx
behavioral1/memory/1920-1-0x00000000003E0000-0x00000000003F1000-memory.dmp	upx
behavioral1/memory/1920-0-0x00000000003E0000-0x00000000003F1000-memory.dmp	upx
behavioral1/memory/1920-4-0x000000003BBA0000-0x000000003BBD8000-memory.dmp	upx
behavioral1/memory/1920-19-0x00000000003E0000-0x00000000003F1000-memory.dmp	upx
behavioral1/memory/2688-26-0x0000000000370000-0x0000000000381000-memory.dmp	upx
behavioral1/memory/2688-28-0x0000000000370000-0x0000000000381000-memory.dmp	upx
behavioral1/memory/2688-27-0x0000000000370000-0x0000000000381000-memory.dmp	upx
behavioral1/memory/2688-25-0x0000000000370000-0x0000000000381000-memory.dmp	upx
behavioral1/memory/2688-29-0x00000000003B0000-0x00000000003E8000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe

Checks processor information in registry 2 TTPs 14 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	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\FeatureSet	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.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
Key queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\FeatureSet	winupdate.exe
Key value enumerated	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	winupdate.exe
Key queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	winupdate.exe
Key value enumerated	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	winupdate.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	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	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeSecurityPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeSystemtimePrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeBackupPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeRestorePrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeShutdownPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeDebugPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeUndockPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeManageVolumePrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeImpersonatePrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: 33	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: 34	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: 35	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	2688	winupdate.exe
Token: SeSecurityPrivilege	2688	winupdate.exe
Token: SeTakeOwnershipPrivilege	2688	winupdate.exe
Token: SeLoadDriverPrivilege	2688	winupdate.exe
Token: SeSystemProfilePrivilege	2688	winupdate.exe
Token: SeSystemtimePrivilege	2688	winupdate.exe
Token: SeProfSingleProcessPrivilege	2688	winupdate.exe
Token: SeIncBasePriorityPrivilege	2688	winupdate.exe
Token: SeCreatePagefilePrivilege	2688	winupdate.exe
Token: SeBackupPrivilege	2688	winupdate.exe
Token: SeRestorePrivilege	2688	winupdate.exe
Token: SeShutdownPrivilege	2688	winupdate.exe
Token: SeDebugPrivilege	2688	winupdate.exe
Token: SeSystemEnvironmentPrivilege	2688	winupdate.exe
Token: SeChangeNotifyPrivilege	2688	winupdate.exe
Token: SeRemoteShutdownPrivilege	2688	winupdate.exe
Token: SeUndockPrivilege	2688	winupdate.exe
Token: SeManageVolumePrivilege	2688	winupdate.exe
Token: SeImpersonatePrivilege	2688	winupdate.exe
Token: SeCreateGlobalPrivilege	2688	winupdate.exe
Token: 33	2688	winupdate.exe
Token: 34	2688	winupdate.exe
Token: 35	2688	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2688	winupdate.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 2688	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2688	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2688	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2688	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2688	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2688	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2688	1920	8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8fbd83dc816c94550613d3224ff57280_JaffaCakes118.exe"
1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1920
- C:\Windupdt\winupdate.exe
  "C:\Windupdt\winupdate.exe"
  2⤵
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2688

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windupdt\winupdate.exe

Filesize
1.0MB

MD5
8fbd83dc816c94550613d3224ff57280

SHA1
aecf122978d42252be280f2fc7efde085f7defd9

SHA256
6a4b915b14136d4c5ccc1a606c5d8281a7c217c261e0215af759d8d7ea121de3

SHA512
93ed5d86e31c1fd98e847c1f0c222c2cdc3c09d8cd222092010b23713134c60dd813aea0275c46b237bf807839576b2bd43db0cdb654f2eae10e735f8e5c7cd3

Download Submit
memory/1920-3-0x00000000003E0000-0x00000000003F1000-memory.dmp

Filesize
68KB

Download
memory/1920-2-0x00000000003E0000-0x00000000003F1000-memory.dmp

Filesize
68KB

Download
memory/1920-1-0x00000000003E0000-0x00000000003F1000-memory.dmp

Filesize
68KB

Download
memory/1920-0-0x00000000003E0000-0x00000000003F1000-memory.dmp

Filesize
68KB

Download
memory/1920-4-0x000000003BBA0000-0x000000003BBD8000-memory.dmp

Filesize
224KB

Download
memory/1920-19-0x00000000003E0000-0x00000000003F1000-memory.dmp

Filesize
68KB

Download
memory/2688-26-0x0000000000370000-0x0000000000381000-memory.dmp

Filesize
68KB

Download
memory/2688-28-0x0000000000370000-0x0000000000381000-memory.dmp

Filesize
68KB

Download
memory/2688-27-0x0000000000370000-0x0000000000381000-memory.dmp

Filesize
68KB

Download
memory/2688-25-0x0000000000370000-0x0000000000381000-memory.dmp

Filesize
68KB

Download
memory/2688-29-0x00000000003B0000-0x00000000003E8000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads