darkcomet | 34810247c2f70e3b67b6f489e302019f4627f7121224699d9d706a381f35a901

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20250313-en
resource tags

arch:x64arch:x86image:win10v2004-20250313-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2025, 21:45

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General

Target

JaffaCakes118_8952a0354c933abffdddc34dd80daf8d.exe
Size

1.1MB
MD5

8952a0354c933abffdddc34dd80daf8d
SHA1

0cf34ff404e300827309a527482f044107c40916
SHA256

34810247c2f70e3b67b6f489e302019f4627f7121224699d9d706a381f35a901
SHA512

e358f80d6f32a59c7731954185ca0c34403c7be2510e090235a73358e3da123c9813163ffb23edea10eb4eb770f10312af66e38ea7b62c9c656c9171667ce49c
SSDEEP

24576:XLidt4+maLUXUvWCRR9418CAK9+LPt57FF583x:B+PLUkTE18BKoLt5mx

Score

10^/10

darkcomet guest16 discovery persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

atteonpro.no-ip.biz:1604

atteonpro.no-ip.biz:100

atteonpro.no-ip.biz:666

Mutex

DC_MUTEX-A6M0LN3

Attributes

InstallPath
MicrosoftXFI\MicrosoftXFI.exe
gencode
wbmfHQTtN7#U
install
true
offline_keylogger
true
persistence
true
reg_key
MicrosoftXFI

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:\\Windows\\system32\\MicrosoftXFI\\MicrosoftXFI.exe"	CryptedFile.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	CryptedFile.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1279544337-3716153908-718418795-1000\Control Panel\International\Geo\Nation	JaffaCakes118_8952a0354c933abffdddc34dd80daf8d.exe

Executes dropped EXE 1 IoCs

pid	Process
4864	CryptedFile.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-1-5-21-1279544337-3716153908-718418795-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicrosoftXFI = "C:\\Windows\\system32\\MicrosoftXFI\\MicrosoftXFI.exe"	CryptedFile.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\MicrosoftXFI\MicrosoftXFI.exe	CryptedFile.exe
File opened for modification	C:\Windows\SysWOW64\MicrosoftXFI\MicrosoftXFI.exe	CryptedFile.exe
File opened for modification	C:\Windows\SysWOW64\MicrosoftXFI\	CryptedFile.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4864 set thread context of 4612	4864	CryptedFile.exe	92

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	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CryptedFile.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	CryptedFile.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	CryptedFile.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	CryptedFile.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	explorer.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	CryptedFile.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	explorer.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	CryptedFile.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	explorer.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4864	CryptedFile.exe
Token: SeSecurityPrivilege	4864	CryptedFile.exe
Token: SeTakeOwnershipPrivilege	4864	CryptedFile.exe
Token: SeLoadDriverPrivilege	4864	CryptedFile.exe
Token: SeSystemProfilePrivilege	4864	CryptedFile.exe
Token: SeSystemtimePrivilege	4864	CryptedFile.exe
Token: SeProfSingleProcessPrivilege	4864	CryptedFile.exe
Token: SeIncBasePriorityPrivilege	4864	CryptedFile.exe
Token: SeCreatePagefilePrivilege	4864	CryptedFile.exe
Token: SeBackupPrivilege	4864	CryptedFile.exe
Token: SeRestorePrivilege	4864	CryptedFile.exe
Token: SeShutdownPrivilege	4864	CryptedFile.exe
Token: SeDebugPrivilege	4864	CryptedFile.exe
Token: SeSystemEnvironmentPrivilege	4864	CryptedFile.exe
Token: SeChangeNotifyPrivilege	4864	CryptedFile.exe
Token: SeRemoteShutdownPrivilege	4864	CryptedFile.exe
Token: SeUndockPrivilege	4864	CryptedFile.exe
Token: SeManageVolumePrivilege	4864	CryptedFile.exe
Token: SeImpersonatePrivilege	4864	CryptedFile.exe
Token: SeCreateGlobalPrivilege	4864	CryptedFile.exe
Token: 33	4864	CryptedFile.exe
Token: 34	4864	CryptedFile.exe
Token: 35	4864	CryptedFile.exe
Token: 36	4864	CryptedFile.exe
Token: SeIncreaseQuotaPrivilege	4612	explorer.exe
Token: SeSecurityPrivilege	4612	explorer.exe
Token: SeTakeOwnershipPrivilege	4612	explorer.exe
Token: SeLoadDriverPrivilege	4612	explorer.exe
Token: SeSystemProfilePrivilege	4612	explorer.exe
Token: SeSystemtimePrivilege	4612	explorer.exe
Token: SeProfSingleProcessPrivilege	4612	explorer.exe
Token: SeIncBasePriorityPrivilege	4612	explorer.exe
Token: SeCreatePagefilePrivilege	4612	explorer.exe
Token: SeBackupPrivilege	4612	explorer.exe
Token: SeRestorePrivilege	4612	explorer.exe
Token: SeShutdownPrivilege	4612	explorer.exe
Token: SeDebugPrivilege	4612	explorer.exe
Token: SeSystemEnvironmentPrivilege	4612	explorer.exe
Token: SeChangeNotifyPrivilege	4612	explorer.exe
Token: SeRemoteShutdownPrivilege	4612	explorer.exe
Token: SeUndockPrivilege	4612	explorer.exe
Token: SeManageVolumePrivilege	4612	explorer.exe
Token: SeImpersonatePrivilege	4612	explorer.exe
Token: SeCreateGlobalPrivilege	4612	explorer.exe
Token: 33	4612	explorer.exe
Token: 34	4612	explorer.exe
Token: 35	4612	explorer.exe
Token: 36	4612	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4612	explorer.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2396 wrote to memory of 4864	2396	JaffaCakes118_8952a0354c933abffdddc34dd80daf8d.exe	88
PID 2396 wrote to memory of 4864	2396	JaffaCakes118_8952a0354c933abffdddc34dd80daf8d.exe	88
PID 2396 wrote to memory of 4864	2396	JaffaCakes118_8952a0354c933abffdddc34dd80daf8d.exe	88
PID 4864 wrote to memory of 4612	4864	CryptedFile.exe	92
PID 4864 wrote to memory of 4612	4864	CryptedFile.exe	92
PID 4864 wrote to memory of 4612	4864	CryptedFile.exe	92
PID 4864 wrote to memory of 4612	4864	CryptedFile.exe	92
PID 4864 wrote to memory of 4612	4864	CryptedFile.exe	92

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8952a0354c933abffdddc34dd80daf8d.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8952a0354c933abffdddc34dd80daf8d.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2396
- C:\Users\Admin\AppData\Local\Temp\CryptedFile.exe
  "C:\Users\Admin\AppData\Local\Temp\CryptedFile.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious use of SetThreadContext
  - 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:4864
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    - Checks BIOS information in registry
    - 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:4612

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Windows\system32\MicrosoftXFI\MicrosoftXFI.exe
1⤵
PID:4040

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\CryptedFile.exe

Filesize
733KB

MD5
323255efd6129e1af0d40dfe56a0dc95

SHA1
39fd58db7e37d2b999990466f0807672fd5b3d26

SHA256
2213590e5fa08bfabe324866dafcbf8569790c61b71a12ee2820690ce5743213

SHA512
e61d6efce33659d29d67a912b290b93d60dc8d1c8cfd4d44584d1cdedbcaac871d038f2ee2ddbfabb25af1329e7a6403ef65c919b8840840ac63d7da9e00fd80

Download Submit
memory/2396-0-0x00007FFC0FAC5000-0x00007FFC0FAC6000-memory.dmp

Filesize
4KB

Download
memory/2396-1-0x000000001B600000-0x000000001B6A6000-memory.dmp

Filesize
664KB

Download
memory/2396-2-0x00007FFC0F810000-0x00007FFC101B1000-memory.dmp

Filesize
9.6MB

Download
memory/2396-3-0x000000001BB80000-0x000000001C04E000-memory.dmp

Filesize
4.8MB

Download
memory/2396-4-0x000000001C120000-0x000000001C1BC000-memory.dmp

Filesize
624KB

Download
memory/2396-5-0x0000000000FD0000-0x0000000000FD8000-memory.dmp

Filesize
32KB

Download
memory/2396-6-0x000000001C280000-0x000000001C2CC000-memory.dmp

Filesize
304KB

Download
memory/2396-7-0x00007FFC0F810000-0x00007FFC101B1000-memory.dmp

Filesize
9.6MB

Download
memory/2396-17-0x00007FFC0F810000-0x00007FFC101B1000-memory.dmp

Filesize
9.6MB

Download
memory/4612-23-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/4612-22-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/4612-24-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/4612-25-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/4612-27-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/4612-29-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/4612-31-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/4612-30-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/4612-28-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/4612-32-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/4864-26-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/4864-18-0x00000000022E0000-0x00000000022E1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads