darkcomet | a0765d2800c0ad0ee6dff1f252f63e26ccf759739c48d2c008c67b1be106a8b3

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
13/03/2025, 18:56

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General

Target

JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Size

504KB
MD5

71c5c3921891aa17a545b12b9081b3ff
SHA1

1a059895434dc4a8e40d19d8411b1432dbdb2060
SHA256

a0765d2800c0ad0ee6dff1f252f63e26ccf759739c48d2c008c67b1be106a8b3
SHA512

cb53f8644fbfa8d6dc5b587c87a21c2b4de9fcfe798e7bc95c862247da39087a1c8cdc60795dbada03762963ed922790a4140128ae949c1b168bb9180d12f12a
SSDEEP

12288:G0Qr0Mk7z+4KMVzDfrTRYQ3+WltCiHE4vTB3cw7m:GBkxFDf/RkWjJvTOB

Score

10^/10

darkcomet guest16 discovery persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

77.120.29.157:1604

Mutex

DC_MUTEX-87KSHV4

Attributes

InstallPath
Windupdt\winupdate.exe
gencode
Esk4h+sMz6Qm
install
true
offline_keylogger
false
persistence
false
reg_key
winupdater

rc4.plain

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:\\Users\\Admin\\AppData\\Local\\Temp\\Windupdt\\winupdate.exe"	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.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	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-250031470-1197856012-2659781506-1000\Control Panel\International\Geo\Nation	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe

Executes dropped EXE 2 IoCs

pid	Process
552	winupdate.exe
3740	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-1-5-21-250031470-1197856012-2659781506-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Windupdt\\winupdate.exe"	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 996 set thread context of 2292	996	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	84
PID 552 set thread context of 3740	552	winupdate.exe	98

UPX packed file 20 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2292-3-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/2292-5-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/2292-7-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/2292-8-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/2292-9-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/2292-10-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/2292-11-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/2292-72-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-81-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-83-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-84-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-85-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-86-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-87-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-89-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-91-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-93-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-95-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-97-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral2/memory/3740-99-0x0000000000400000-0x00000000004F7000-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 4 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	winupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe

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 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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	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	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeSecurityPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeTakeOwnershipPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeLoadDriverPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeSystemProfilePrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeSystemtimePrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeProfSingleProcessPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeIncBasePriorityPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeCreatePagefilePrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeBackupPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeRestorePrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeShutdownPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeDebugPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeSystemEnvironmentPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeChangeNotifyPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeRemoteShutdownPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeUndockPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeManageVolumePrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeImpersonatePrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeCreateGlobalPrivilege	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: 33	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: 34	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: 35	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: 36	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
Token: SeIncreaseQuotaPrivilege	3740	winupdate.exe
Token: SeSecurityPrivilege	3740	winupdate.exe
Token: SeTakeOwnershipPrivilege	3740	winupdate.exe
Token: SeLoadDriverPrivilege	3740	winupdate.exe
Token: SeSystemProfilePrivilege	3740	winupdate.exe
Token: SeSystemtimePrivilege	3740	winupdate.exe
Token: SeProfSingleProcessPrivilege	3740	winupdate.exe
Token: SeIncBasePriorityPrivilege	3740	winupdate.exe
Token: SeCreatePagefilePrivilege	3740	winupdate.exe
Token: SeBackupPrivilege	3740	winupdate.exe
Token: SeRestorePrivilege	3740	winupdate.exe
Token: SeShutdownPrivilege	3740	winupdate.exe
Token: SeDebugPrivilege	3740	winupdate.exe
Token: SeSystemEnvironmentPrivilege	3740	winupdate.exe
Token: SeChangeNotifyPrivilege	3740	winupdate.exe
Token: SeRemoteShutdownPrivilege	3740	winupdate.exe
Token: SeUndockPrivilege	3740	winupdate.exe
Token: SeManageVolumePrivilege	3740	winupdate.exe
Token: SeImpersonatePrivilege	3740	winupdate.exe
Token: SeCreateGlobalPrivilege	3740	winupdate.exe
Token: 33	3740	winupdate.exe
Token: 34	3740	winupdate.exe
Token: 35	3740	winupdate.exe
Token: 36	3740	winupdate.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
996	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
996	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
552	winupdate.exe
552	winupdate.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 996 wrote to memory of 2292	996	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	84
PID 996 wrote to memory of 2292	996	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	84
PID 996 wrote to memory of 2292	996	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	84
PID 996 wrote to memory of 2292	996	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	84
PID 996 wrote to memory of 2292	996	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	84
PID 996 wrote to memory of 2292	996	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	84
PID 996 wrote to memory of 2292	996	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	84
PID 996 wrote to memory of 2292	996	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	84
PID 2292 wrote to memory of 552	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	97
PID 2292 wrote to memory of 552	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	97
PID 2292 wrote to memory of 552	2292	JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe	97
PID 552 wrote to memory of 3740	552	winupdate.exe	98
PID 552 wrote to memory of 3740	552	winupdate.exe	98
PID 552 wrote to memory of 3740	552	winupdate.exe	98
PID 552 wrote to memory of 3740	552	winupdate.exe	98
PID 552 wrote to memory of 3740	552	winupdate.exe	98
PID 552 wrote to memory of 3740	552	winupdate.exe	98
PID 552 wrote to memory of 3740	552	winupdate.exe	98
PID 552 wrote to memory of 3740	552	winupdate.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:996
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_71c5c3921891aa17a545b12b9081b3ff.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2292
- - C:\Users\Admin\AppData\Local\Temp\Windupdt\winupdate.exe
    "C:\Users\Admin\AppData\Local\Temp\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:552
  - - C:\Users\Admin\AppData\Local\Temp\Windupdt\winupdate.exe
      "C:\Users\Admin\AppData\Local\Temp\Windupdt\winupdate.exe"
      4⤵
      Checks BIOS information in registry
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious use of AdjustPrivilegeToken
      PID:3740

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:\Users\Admin\AppData\Local\Temp\Windupdt\winupdate.exe

Filesize
504KB

MD5
71c5c3921891aa17a545b12b9081b3ff

SHA1
1a059895434dc4a8e40d19d8411b1432dbdb2060

SHA256
a0765d2800c0ad0ee6dff1f252f63e26ccf759739c48d2c008c67b1be106a8b3

SHA512
cb53f8644fbfa8d6dc5b587c87a21c2b4de9fcfe798e7bc95c862247da39087a1c8cdc60795dbada03762963ed922790a4140128ae949c1b168bb9180d12f12a

Download Submit
memory/552-82-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/996-0-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/996-6-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2292-3-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/2292-5-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/2292-7-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/2292-8-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/2292-9-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/2292-10-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/2292-11-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/2292-72-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-81-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-83-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-84-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-85-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-86-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-87-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-89-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-91-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-93-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-95-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-97-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download
memory/3740-99-0x0000000000400000-0x00000000004F7000-memory.dmp

Filesize
988KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads