darkcomet | 889d0c285c75bd93dd27109f019888e188996edcb4760ab9703627a1d341de5a

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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
1940	attrib.exe

Executes dropped EXE 3 IoCs

pid	Process
2384	winz.exe
2484	winlogon.exe
2792	msdcsc.exe

Loads dropped DLL 4 IoCs

pid	Process
2372	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe
2372	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe
2384	winz.exe
2484	winlogon.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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Live = "C:\\Users\\Admin\\AppData\\Local\\Temp\\winz.exe"	winz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\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 2384 set thread context of 2484	2384	winz.exe	32

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2384	winz.exe
2384	winz.exe

Suspicious use of AdjustPrivilegeToken 26 IoCs

description	pid	Process
Token: SeDebugPrivilege	2372	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe
Token: SeDebugPrivilege	2384	winz.exe
Token: SeIncreaseQuotaPrivilege	2484	winlogon.exe
Token: SeSecurityPrivilege	2484	winlogon.exe
Token: SeTakeOwnershipPrivilege	2484	winlogon.exe
Token: SeLoadDriverPrivilege	2484	winlogon.exe
Token: SeSystemProfilePrivilege	2484	winlogon.exe
Token: SeSystemtimePrivilege	2484	winlogon.exe
Token: SeProfSingleProcessPrivilege	2484	winlogon.exe
Token: SeIncBasePriorityPrivilege	2484	winlogon.exe
Token: SeCreatePagefilePrivilege	2484	winlogon.exe
Token: SeBackupPrivilege	2484	winlogon.exe
Token: SeRestorePrivilege	2484	winlogon.exe
Token: SeShutdownPrivilege	2484	winlogon.exe
Token: SeDebugPrivilege	2484	winlogon.exe
Token: SeSystemEnvironmentPrivilege	2484	winlogon.exe
Token: SeChangeNotifyPrivilege	2484	winlogon.exe
Token: SeRemoteShutdownPrivilege	2484	winlogon.exe
Token: SeUndockPrivilege	2484	winlogon.exe
Token: SeManageVolumePrivilege	2484	winlogon.exe
Token: SeImpersonatePrivilege	2484	winlogon.exe
Token: SeCreateGlobalPrivilege	2484	winlogon.exe
Token: 33	2484	winlogon.exe
Token: 34	2484	winlogon.exe
Token: 35	2484	winlogon.exe
Token: SeDebugPrivilege	2384	winz.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 2384	2372	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	30
PID 2372 wrote to memory of 2384	2372	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	30
PID 2372 wrote to memory of 2384	2372	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	30
PID 2372 wrote to memory of 2384	2372	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	30
PID 2372 wrote to memory of 2580	2372	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	31
PID 2372 wrote to memory of 2580	2372	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	31
PID 2372 wrote to memory of 2580	2372	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	31
PID 2372 wrote to memory of 2580	2372	bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe	31
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2384 wrote to memory of 2484	2384	winz.exe	32
PID 2484 wrote to memory of 2648	2484	winlogon.exe	33
PID 2484 wrote to memory of 2648	2484	winlogon.exe	33
PID 2484 wrote to memory of 2648	2484	winlogon.exe	33
PID 2484 wrote to memory of 2648	2484	winlogon.exe	33
PID 2484 wrote to memory of 2792	2484	winlogon.exe	35
PID 2484 wrote to memory of 2792	2484	winlogon.exe	35
PID 2484 wrote to memory of 2792	2484	winlogon.exe	35
PID 2484 wrote to memory of 2792	2484	winlogon.exe	35
PID 2648 wrote to memory of 1940	2648	cmd.exe	37
PID 2648 wrote to memory of 1940	2648	cmd.exe	37
PID 2648 wrote to memory of 1940	2648	cmd.exe	37
PID 2648 wrote to memory of 1940	2648	cmd.exe	37

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1940	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\bd67d22cadfe66ca3f914e4702a437b5_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Users\Admin\AppData\Local\Temp\winz.exe
  "C:\Users\Admin\AppData\Local\Temp\winz.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - 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:2384
- - C:\Users\Admin\AppData\Local\Temp\winlogon.exe
    C:\Users\Admin\AppData\Local\Temp\\winlogon.exe
    3⤵
    - Modifies WinLogon for persistence
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2484
  - - 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:2648
    - - 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:1940
  - - 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:2792
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
  dw20.exe -x -s 940
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2580

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

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

\Users\Admin\AppData\Local\Temp\winlogon.exe

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

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

Filesize
461KB

MD5
c6c68ae3743666b5339bd25510954093

SHA1
e61308ee91092f3dc5875fe008f0a583aa69d96b

SHA256
f3382b5188af2292dc114299107947284ebb6583096f93ab2f966787f8cb6101

SHA512
2110269bfa3b7a6c52c466216c5e7534c0ec532bcd13aaff972e12c17f0a287ffaa29f1cf3f2b85ff2b5b02c3d6daeca435fc1b46bec9dccf494950c2be9e474

Download Submit
memory/2372-0-0x0000000074771000-0x0000000074772000-memory.dmp

Filesize
4KB

Download
memory/2372-1-0x0000000074770000-0x0000000074D1B000-memory.dmp

Filesize
5.7MB

Download
memory/2372-2-0x0000000074770000-0x0000000074D1B000-memory.dmp

Filesize
5.7MB

Download
memory/2372-51-0x0000000074770000-0x0000000074D1B000-memory.dmp

Filesize
5.7MB

Download
memory/2384-13-0x0000000074770000-0x0000000074D1B000-memory.dmp

Filesize
5.7MB

Download
memory/2384-14-0x0000000074770000-0x0000000074D1B000-memory.dmp

Filesize
5.7MB

Download
memory/2384-48-0x0000000074770000-0x0000000074D1B000-memory.dmp

Filesize
5.7MB

Download
memory/2484-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2484-38-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2484-33-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2484-31-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2484-30-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2484-27-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2484-25-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2484-23-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2484-21-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2484-36-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2484-49-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2484-19-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download