darkcomet | 0c22f65c096a3ebca29d800e2e30c1291229bd1db3b2cfbe9303ab7def9e9111

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
18-02-2025 16:00

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General

Target

JaffaCakes118_00a4804e5ff628d91bacaccbfa41beeb.exe
Size

855KB
MD5

00a4804e5ff628d91bacaccbfa41beeb
SHA1

e1014862ba1d2d4a2e1da1452fa7adcf3a3b9de3
SHA256

0c22f65c096a3ebca29d800e2e30c1291229bd1db3b2cfbe9303ab7def9e9111
SHA512

8e5c0844feaeb8f9d1d1b6a8b21be8778a16984e0a1dc717dfe193f5aa6c5e9a99d39313a3ec16af71b45ede2bb82546de0cf28a331985c01157c1e676aa6f16
SSDEEP

12288:tca+CQY9l6sJLKCBRJ8EsYZHHxVb3vM3ZTAmApSFghd30TQLzMkxYZ/h:u1CQKljLKyRpHH7v4ZT5gj3l0mc

Score

10^/10

darkcomet guest16 discovery persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

nydarion2.zapto.org:2525

Mutex

DC_MUTEX-HRS8C6U

Attributes

InstallPath
Windupdt\winupdate.exe
gencode
1o-r##XwizVR
install
true
offline_keylogger
false
password
boni
persistence
true
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:\\Windows\\system32\\Windupdt\\winupdate.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	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	CryptedFile.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-1-5-21-1479699283-3000499823-2337359760-1000\Control Panel\International\Geo\Nation	JaffaCakes118_00a4804e5ff628d91bacaccbfa41beeb.exe

Executes dropped EXE 1 IoCs

pid	Process
920	CryptedFile.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-1-5-21-1479699283-3000499823-2337359760-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windows\\system32\\Windupdt\\winupdate.exe"	CryptedFile.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1479699283-3000499823-2337359760-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windows\\system32\\Windupdt\\winupdate.exe"	notepad.exe

Drops file in System32 directory 4 IoCs

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 920 set thread context of 4628	920	CryptedFile.exe	91

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

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 behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4628	explorer.exe

Suspicious use of AdjustPrivilegeToken 49 IoCs

description	pid	Process
Token: SeDebugPrivilege	5000	JaffaCakes118_00a4804e5ff628d91bacaccbfa41beeb.exe
Token: SeIncreaseQuotaPrivilege	920	CryptedFile.exe
Token: SeSecurityPrivilege	920	CryptedFile.exe
Token: SeTakeOwnershipPrivilege	920	CryptedFile.exe
Token: SeLoadDriverPrivilege	920	CryptedFile.exe
Token: SeSystemProfilePrivilege	920	CryptedFile.exe
Token: SeSystemtimePrivilege	920	CryptedFile.exe
Token: SeProfSingleProcessPrivilege	920	CryptedFile.exe
Token: SeIncBasePriorityPrivilege	920	CryptedFile.exe
Token: SeCreatePagefilePrivilege	920	CryptedFile.exe
Token: SeBackupPrivilege	920	CryptedFile.exe
Token: SeRestorePrivilege	920	CryptedFile.exe
Token: SeShutdownPrivilege	920	CryptedFile.exe
Token: SeDebugPrivilege	920	CryptedFile.exe
Token: SeSystemEnvironmentPrivilege	920	CryptedFile.exe
Token: SeChangeNotifyPrivilege	920	CryptedFile.exe
Token: SeRemoteShutdownPrivilege	920	CryptedFile.exe
Token: SeUndockPrivilege	920	CryptedFile.exe
Token: SeManageVolumePrivilege	920	CryptedFile.exe
Token: SeImpersonatePrivilege	920	CryptedFile.exe
Token: SeCreateGlobalPrivilege	920	CryptedFile.exe
Token: 33	920	CryptedFile.exe
Token: 34	920	CryptedFile.exe
Token: 35	920	CryptedFile.exe
Token: 36	920	CryptedFile.exe
Token: SeIncreaseQuotaPrivilege	4628	explorer.exe
Token: SeSecurityPrivilege	4628	explorer.exe
Token: SeTakeOwnershipPrivilege	4628	explorer.exe
Token: SeLoadDriverPrivilege	4628	explorer.exe
Token: SeSystemProfilePrivilege	4628	explorer.exe
Token: SeSystemtimePrivilege	4628	explorer.exe
Token: SeProfSingleProcessPrivilege	4628	explorer.exe
Token: SeIncBasePriorityPrivilege	4628	explorer.exe
Token: SeCreatePagefilePrivilege	4628	explorer.exe
Token: SeBackupPrivilege	4628	explorer.exe
Token: SeRestorePrivilege	4628	explorer.exe
Token: SeShutdownPrivilege	4628	explorer.exe
Token: SeDebugPrivilege	4628	explorer.exe
Token: SeSystemEnvironmentPrivilege	4628	explorer.exe
Token: SeChangeNotifyPrivilege	4628	explorer.exe
Token: SeRemoteShutdownPrivilege	4628	explorer.exe
Token: SeUndockPrivilege	4628	explorer.exe
Token: SeManageVolumePrivilege	4628	explorer.exe
Token: SeImpersonatePrivilege	4628	explorer.exe
Token: SeCreateGlobalPrivilege	4628	explorer.exe
Token: 33	4628	explorer.exe
Token: 34	4628	explorer.exe
Token: 35	4628	explorer.exe
Token: 36	4628	explorer.exe

Suspicious use of WriteProcessMemory 53 IoCs

description	pid	Process	procid_target
PID 5000 wrote to memory of 920	5000	JaffaCakes118_00a4804e5ff628d91bacaccbfa41beeb.exe	89
PID 5000 wrote to memory of 920	5000	JaffaCakes118_00a4804e5ff628d91bacaccbfa41beeb.exe	89
PID 5000 wrote to memory of 920	5000	JaffaCakes118_00a4804e5ff628d91bacaccbfa41beeb.exe	89
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 1856	920	CryptedFile.exe	90
PID 920 wrote to memory of 4628	920	CryptedFile.exe	91
PID 920 wrote to memory of 4628	920	CryptedFile.exe	91
PID 920 wrote to memory of 4628	920	CryptedFile.exe	91
PID 920 wrote to memory of 4628	920	CryptedFile.exe	91
PID 920 wrote to memory of 4628	920	CryptedFile.exe	91
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92
PID 4628 wrote to memory of 368	4628	explorer.exe	92

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_00a4804e5ff628d91bacaccbfa41beeb.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_00a4804e5ff628d91bacaccbfa41beeb.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5000
- 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:920
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    - Adds Run key to start application
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    PID:1856
- - 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 behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4628
  - - C:\Windows\SysWOW64\notepad.exe
      C:\Windows\SysWOW64\notepad.exe
      4⤵
      System Location Discovery: System Language Discovery
      PID:368

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
756KB

MD5
be7428cf2b2a3d766e09bd9a27c240dd

SHA1
1a2710aad6f8998f7009fa07f00c5abdb5ddbe47

SHA256
d1c3687a0bfbc4eccfa4b185141fe1e393561715f70ba4a51aa14979c5451d49

SHA512
d10739427f961b8e3b9811e5d16906c9cda22767be6cf60e8f0147ae7edc1b954be84d7cdeeac5910cacacb6919da0ebe05c93a3a7cae5a83ab29ae3984e6d7b

Download Submit
memory/368-28-0x0000000000EB0000-0x0000000000EB1000-memory.dmp

Filesize
4KB

Download
memory/920-31-0x0000000013140000-0x000000001320F000-memory.dmp

Filesize
828KB

Download
memory/920-19-0x0000000002770000-0x0000000002771000-memory.dmp

Filesize
4KB

Download
memory/1856-21-0x0000000000EB0000-0x0000000000EB1000-memory.dmp

Filesize
4KB

Download
memory/4628-27-0x0000000013140000-0x000000001320F000-memory.dmp

Filesize
828KB

Download
memory/4628-30-0x0000000013140000-0x000000001320F000-memory.dmp

Filesize
828KB

Download
memory/4628-32-0x0000000000C20000-0x0000000001053000-memory.dmp

Filesize
4.2MB

Download
memory/4628-29-0x0000000013140000-0x000000001320F000-memory.dmp

Filesize
828KB

Download
memory/4628-26-0x0000000013140000-0x000000001320F000-memory.dmp

Filesize
828KB

Download
memory/4628-25-0x0000000013140000-0x000000001320F000-memory.dmp

Filesize
828KB

Download
memory/4628-24-0x0000000013140000-0x000000001320F000-memory.dmp

Filesize
828KB

Download
memory/5000-5-0x000000001BF70000-0x000000001C00C000-memory.dmp

Filesize
624KB

Download
memory/5000-18-0x00007FFD9E400000-0x00007FFD9EDA1000-memory.dmp

Filesize
9.6MB

Download
memory/5000-8-0x00007FFD9E400000-0x00007FFD9EDA1000-memory.dmp

Filesize
9.6MB

Download
memory/5000-7-0x000000001C100000-0x000000001C14C000-memory.dmp

Filesize
304KB

Download
memory/5000-6-0x000000001B8F0000-0x000000001B8F8000-memory.dmp

Filesize
32KB

Download
memory/5000-0-0x00007FFD9E6B5000-0x00007FFD9E6B6000-memory.dmp

Filesize
4KB

Download
memory/5000-4-0x000000001C790000-0x000000001CC5E000-memory.dmp

Filesize
4.8MB

Download
memory/5000-3-0x00007FFD9E400000-0x00007FFD9EDA1000-memory.dmp

Filesize
9.6MB

Download
memory/5000-2-0x00007FFD9E400000-0x00007FFD9EDA1000-memory.dmp

Filesize
9.6MB

Download
memory/5000-1-0x000000001B830000-0x000000001B8D6000-memory.dmp

Filesize
664KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads