darkcomet | bf6010249f73cd7507fe3b782c4dc6e954ae934a1028c71c887c7dbe10010387

Analysis

max time kernel
131s
max time network
99s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
23/07/2024, 23:36

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General

Target
6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe
Size 1.8MB
Sample240723-3lrmxsvfll
SHA256 bf6010249f73cd7507fe3b782c4dc6e954ae934a1028c71c887c7dbe10010387
MD5 6969b660100552c0d19c876991b7bf27
SHA1 8eee8a44cc1d1b6e35017be01770a6fb5b49eb5d
SHA512 ab4d96b6d126dfeafc16cd24f0a0554b3908163e65788e58e35242e31f7a2c65b81355b99ed8fba07692661a6ce408ca88f37472c83891e8b1a73e5113de940f
SSDEEP 12288:AG/b778/+OiZsSOIk+Yrs8V+p7kvV5cvFfGMCwMSXgk9XJIC21YLuGd3GjCnjtdG:z/StqvJXJvxM4pLNk94yTlT6OYc7h7Z
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet guest16 discovery evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

darkcomet2013.no-ip.biz:1500
192.168.1.71:1500

Mutex

DC_MUTEX-HEDDRVL

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
PcNHhxPkunCb
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

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\\MSDCSC\\msdcsc.exe"	vbc.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
2484	attrib.exe
4392	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
1716	msdcsc.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

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-1-5-21-1705699165-553239100-4129523827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	vbc.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2288 set thread context of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Microsoft.Net\Framework\v2.0.50727\vbc.exe	attrib.exe
File opened for modification	C:\Windows\Microsoft.Net\Framework\v2.0.50727	attrib.exe

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	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	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 1 IoCs

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

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	548	vbc.exe
Token: SeSecurityPrivilege	548	vbc.exe
Token: SeTakeOwnershipPrivilege	548	vbc.exe
Token: SeLoadDriverPrivilege	548	vbc.exe
Token: SeSystemProfilePrivilege	548	vbc.exe
Token: SeSystemtimePrivilege	548	vbc.exe
Token: SeProfSingleProcessPrivilege	548	vbc.exe
Token: SeIncBasePriorityPrivilege	548	vbc.exe
Token: SeCreatePagefilePrivilege	548	vbc.exe
Token: SeBackupPrivilege	548	vbc.exe
Token: SeRestorePrivilege	548	vbc.exe
Token: SeShutdownPrivilege	548	vbc.exe
Token: SeDebugPrivilege	548	vbc.exe
Token: SeSystemEnvironmentPrivilege	548	vbc.exe
Token: SeChangeNotifyPrivilege	548	vbc.exe
Token: SeRemoteShutdownPrivilege	548	vbc.exe
Token: SeUndockPrivilege	548	vbc.exe
Token: SeManageVolumePrivilege	548	vbc.exe
Token: SeImpersonatePrivilege	548	vbc.exe
Token: SeCreateGlobalPrivilege	548	vbc.exe
Token: 33	548	vbc.exe
Token: 34	548	vbc.exe
Token: 35	548	vbc.exe
Token: 36	548	vbc.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 2288 wrote to memory of 548	2288	6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe	84
PID 548 wrote to memory of 4516	548	vbc.exe	94
PID 548 wrote to memory of 4516	548	vbc.exe	94
PID 548 wrote to memory of 4516	548	vbc.exe	94
PID 548 wrote to memory of 3608	548	vbc.exe	96
PID 548 wrote to memory of 3608	548	vbc.exe	96
PID 548 wrote to memory of 3608	548	vbc.exe	96
PID 4516 wrote to memory of 2484	4516	cmd.exe	98
PID 4516 wrote to memory of 2484	4516	cmd.exe	98
PID 4516 wrote to memory of 2484	4516	cmd.exe	98
PID 3608 wrote to memory of 4392	3608	cmd.exe	99
PID 3608 wrote to memory of 4392	3608	cmd.exe	99
PID 3608 wrote to memory of 4392	3608	cmd.exe	99
PID 548 wrote to memory of 1716	548	vbc.exe	100
PID 548 wrote to memory of 1716	548	vbc.exe	100
PID 548 wrote to memory of 1716	548	vbc.exe	100

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2484	attrib.exe
4392	attrib.exe

C:\Users\Admin\AppData\Local\Temp\6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\6969b660100552c0d19c876991b7bf27_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2288
- C:\Windows\Microsoft.Net\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.Net\Framework\v2.0.50727\vbc.exe
  2⤵
  - Modifies WinLogon for persistence
  - Adds Run key to start application
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:548
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.Net\Framework\v2.0.50727\vbc.exe" +s +h
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4516
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Windows\Microsoft.Net\Framework\v2.0.50727\vbc.exe" +s +h
      4⤵
      Sets file to hidden
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Views/modifies file attributes
      PID:2484
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.Net\Framework\v2.0.50727" +s +h
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3608
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Windows\Microsoft.Net\Framework\v2.0.50727" +s +h
      4⤵
      Sets file to hidden
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Views/modifies file attributes
      PID:4392
- - C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
    "C:\Windows\system32\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1716

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

T1064

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

Scripting

T1064

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

msdcsc.exe

Path C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
Size 1.1MB
SHA256 b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0
MD5 d881de17aa8f2e2c08cbb7b265f928f9
SHA1 08936aebc87decf0af6e8eada191062b5e65ac2a
SHA512 5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34
SSDEEP 24576:jp2silPBMIXGWClfuRcUGIJYK15Qs/QZM:jp2sMO7VzUTJH15QFZM
MD5 SHA1 SHA512 SSDEEP

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memory/548-4-0x0000000000400000-0x00000000004BD000-memory.dmp

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memory/548-3-0x0000000000400000-0x00000000004BD000-memory.dmp

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memory/548-6-0x0000000000400000-0x00000000004BD000-memory.dmp

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memory/548-8-0x0000000000400000-0x00000000004BD000-memory.dmp

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memory/548-9-0x0000000000400000-0x00000000004BD000-memory.dmp

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memory/548-72-0x0000000000400000-0x00000000004BD000-memory.dmp

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memory/2288-0-0x0000000075342000-0x0000000075343000-memory.dmp

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memory/2288-1-0x0000000075340000-0x00000000758F1000-memory.dmp

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memory/2288-2-0x0000000075340000-0x00000000758F1000-memory.dmp

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memory/2288-7-0x0000000075340000-0x00000000758F1000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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