darkcomet | 889d0c285c75bd93dd27109f019888e188996edcb4760ab9703627a1d341de5a

Analysis

max time kernel
93s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-12-2024 12:29

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General

Target

bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe
Size

699KB
MD5

bd67d22cadfe66ca3f914e4702a437b5
SHA1

42e36f5b1e9a116c1a9ae6c740186fb7606c63da
SHA256

889d0c285c75bd93dd27109f019888e188996edcb4760ab9703627a1d341de5a
SHA512

1bb588877eb9161efe5e409d7dc1347ecf69e15812d1c9309d29d196acfd11fd08b0348af61b05efc1728b535f0bca5a03fd97b37b9733ce7ef571ba6090826f
SSDEEP

12288:S26g9e3ai37SzggkWClfOV8ef2h/8C+QISVBy4iKFRUX6YfllbSpbIwyg7X1UKCh:S26g4qi37SzgpWClfOhf298C+QISVByd

Score

10^/10

darkcomet guest16 discovery evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

72.39.160.230:1256

Mutex

DC_MUTEX-P9BUQZZ

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
Z8FqYnljpmJi
install
true
offline_keylogger
true
persistence
true
reg_key
MicroUpdate

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\\MSDCSC\\msdcsc.exe"	winlogon.exe

Sets file to hidden 1 TTPs 1 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
2768	attrib.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	winlogon.exe

Executes dropped EXE 3 IoCs

pid	Process
2536	winz.exe
4664	winlogon.exe
4780	msdcsc.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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Live = "C:\\Users\\Admin\\AppData\\Local\\Temp\\winz.exe"	winz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	winlogon.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2536 set thread context of 4664	2536	winz.exe	85

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 7 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	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dw20.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winlogon.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe

Checks processor information in registry 2 TTPs 3 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	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2536	winz.exe
2536	winz.exe

Suspicious use of AdjustPrivilegeToken 31 IoCs

description	pid	Process
Token: SeDebugPrivilege	4632	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe
Token: SeRestorePrivilege	4132	dw20.exe
Token: SeBackupPrivilege	4132	dw20.exe
Token: SeDebugPrivilege	2536	winz.exe
Token: SeBackupPrivilege	4132	dw20.exe
Token: SeBackupPrivilege	4132	dw20.exe
Token: SeIncreaseQuotaPrivilege	4664	winlogon.exe
Token: SeSecurityPrivilege	4664	winlogon.exe
Token: SeTakeOwnershipPrivilege	4664	winlogon.exe
Token: SeLoadDriverPrivilege	4664	winlogon.exe
Token: SeSystemProfilePrivilege	4664	winlogon.exe
Token: SeSystemtimePrivilege	4664	winlogon.exe
Token: SeProfSingleProcessPrivilege	4664	winlogon.exe
Token: SeIncBasePriorityPrivilege	4664	winlogon.exe
Token: SeCreatePagefilePrivilege	4664	winlogon.exe
Token: SeBackupPrivilege	4664	winlogon.exe
Token: SeRestorePrivilege	4664	winlogon.exe
Token: SeShutdownPrivilege	4664	winlogon.exe
Token: SeDebugPrivilege	4664	winlogon.exe
Token: SeSystemEnvironmentPrivilege	4664	winlogon.exe
Token: SeChangeNotifyPrivilege	4664	winlogon.exe
Token: SeRemoteShutdownPrivilege	4664	winlogon.exe
Token: SeUndockPrivilege	4664	winlogon.exe
Token: SeManageVolumePrivilege	4664	winlogon.exe
Token: SeImpersonatePrivilege	4664	winlogon.exe
Token: SeCreateGlobalPrivilege	4664	winlogon.exe
Token: 33	4664	winlogon.exe
Token: 34	4664	winlogon.exe
Token: 35	4664	winlogon.exe
Token: 36	4664	winlogon.exe
Token: SeDebugPrivilege	2536	winz.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 4632 wrote to memory of 2536	4632	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	83
PID 4632 wrote to memory of 2536	4632	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	83
PID 4632 wrote to memory of 2536	4632	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	83
PID 4632 wrote to memory of 4132	4632	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	84
PID 4632 wrote to memory of 4132	4632	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	84
PID 4632 wrote to memory of 4132	4632	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	84
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 2536 wrote to memory of 4664	2536	winz.exe	85
PID 4664 wrote to memory of 4308	4664	winlogon.exe	87
PID 4664 wrote to memory of 4308	4664	winlogon.exe	87
PID 4664 wrote to memory of 4308	4664	winlogon.exe	87
PID 4664 wrote to memory of 4780	4664	winlogon.exe	89
PID 4664 wrote to memory of 4780	4664	winlogon.exe	89
PID 4664 wrote to memory of 4780	4664	winlogon.exe	89
PID 4308 wrote to memory of 2768	4308	cmd.exe	91
PID 4308 wrote to memory of 2768	4308	cmd.exe	91
PID 4308 wrote to memory of 2768	4308	cmd.exe	91

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2768	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4632
- C:\Users\Admin\AppData\Local\Temp\winz.exe
  "C:\Users\Admin\AppData\Local\Temp\winz.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2536
- - C:\Users\Admin\AppData\Local\Temp\winlogon.exe
    C:\Users\Admin\AppData\Local\Temp\\winlogon.exe
    3⤵
    - Modifies WinLogon for persistence
    - Checks computer location settings
    - Executes dropped EXE
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4664
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\winlogon.exe" +s +h
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4308
    - - C:\Windows\SysWOW64\attrib.exe
        
        attrib "C:\Users\Admin\AppData\Local\Temp\winlogon.exe" +s +h
        5⤵
        Sets file to hidden
        System Location Discovery: System Language Discovery
        Views/modifies file attributes
        
        PID:2768
  - - C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
      "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:4780
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
  dw20.exe -x -s 1568
  2⤵
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:4132

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

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\winlogon.exe

Filesize
34KB

MD5
e118330b4629b12368d91b9df6488be0

SHA1
ce90218c7e3b90df2a3409ec253048bb6472c2fd

SHA256
3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

SHA512
ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

Download Submit
C:\Users\Admin\AppData\Local\Temp\winz.exe

Filesize
461KB

MD5
c6c68ae3743666b5339bd25510954093

SHA1
e61308ee91092f3dc5875fe008f0a583aa69d96b

SHA256
f3382b5188af2292dc114299107947284ebb6583096f93ab2f966787f8cb6101

SHA512
2110269bfa3b7a6c52c466216c5e7534c0ec532bcd13aaff972e12c17f0a287ffaa29f1cf3f2b85ff2b5b02c3d6daeca435fc1b46bec9dccf494950c2be9e474

Download Submit
memory/2536-16-0x00000000746C0000-0x0000000074C71000-memory.dmp

Filesize
5.7MB

Download
memory/2536-14-0x00000000746C0000-0x0000000074C71000-memory.dmp

Filesize
5.7MB

Download
memory/2536-15-0x00000000746C0000-0x0000000074C71000-memory.dmp

Filesize
5.7MB

Download
memory/2536-47-0x00000000746C0000-0x0000000074C71000-memory.dmp

Filesize
5.7MB

Download
memory/4632-2-0x00000000746C0000-0x0000000074C71000-memory.dmp

Filesize
5.7MB

Download
memory/4632-0-0x00000000746C2000-0x00000000746C3000-memory.dmp

Filesize
4KB

Download
memory/4632-1-0x00000000746C0000-0x0000000074C71000-memory.dmp

Filesize
5.7MB

Download
memory/4632-44-0x00000000746C0000-0x0000000074C71000-memory.dmp

Filesize
5.7MB

Download
memory/4664-19-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4664-22-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4664-25-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4664-27-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4664-48-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download