darkcomet | 6679a157968488d2f8af8206da59398882810f62b27ac2cf21b781a36d4b5e40

General

Target

8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe
Size

887KB
MD5

8f4ca87cc028e9a6479df77f44ddfc55
SHA1

3cdcdc3bb8f263f2682559569f7383437f819b6b
SHA256

6679a157968488d2f8af8206da59398882810f62b27ac2cf21b781a36d4b5e40
SHA512

d0b6de3227409c66c7f9c867bde969f61bc5124dea17b508684505378ba75d1ffa5f6efe177d5f246a2f0a6f475cc7428d5efa6b48ec009e5b8fdcff0679e8fd
SSDEEP

24576:pAzTNJKOtfxLmn9JzIp0EJPQE2uC5b6ek11g+Yx6q9Aj:k8M0t3uCHkk+YxM

Score

10^/10

darkcomet discovery persistence rat trojan

Malware Config

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

Processes:

vbc.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\MSDCSC\\msdcsc.exe"	vbc.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid	Process
4392	msdcsc.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exevbc.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ValueName = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\filename.exe\""	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe

description	pid	Process	procid_target
PID 4936 set thread context of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87

System Location Discovery: System Language Discovery 1 TTPs 3 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

Processes:

vbc.exemsdcsc.exe8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe

Modifies registry class 1 IoCs

Processes:

vbc.exe

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

Suspicious use of AdjustPrivilegeToken 25 IoCs

Processes:

8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exevbc.exe

description	pid	Process
Token: SeDebugPrivilege	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	5040	vbc.exe
Token: SeSecurityPrivilege	5040	vbc.exe
Token: SeTakeOwnershipPrivilege	5040	vbc.exe
Token: SeLoadDriverPrivilege	5040	vbc.exe
Token: SeSystemProfilePrivilege	5040	vbc.exe
Token: SeSystemtimePrivilege	5040	vbc.exe
Token: SeProfSingleProcessPrivilege	5040	vbc.exe
Token: SeIncBasePriorityPrivilege	5040	vbc.exe
Token: SeCreatePagefilePrivilege	5040	vbc.exe
Token: SeBackupPrivilege	5040	vbc.exe
Token: SeRestorePrivilege	5040	vbc.exe
Token: SeShutdownPrivilege	5040	vbc.exe
Token: SeDebugPrivilege	5040	vbc.exe
Token: SeSystemEnvironmentPrivilege	5040	vbc.exe
Token: SeChangeNotifyPrivilege	5040	vbc.exe
Token: SeRemoteShutdownPrivilege	5040	vbc.exe
Token: SeUndockPrivilege	5040	vbc.exe
Token: SeManageVolumePrivilege	5040	vbc.exe
Token: SeImpersonatePrivilege	5040	vbc.exe
Token: SeCreateGlobalPrivilege	5040	vbc.exe
Token: 33	5040	vbc.exe
Token: 34	5040	vbc.exe
Token: 35	5040	vbc.exe
Token: 36	5040	vbc.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exevbc.exe

description	pid	Process	procid_target
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 4936 wrote to memory of 5040	4936	8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe	87
PID 5040 wrote to memory of 4392	5040	vbc.exe	93
PID 5040 wrote to memory of 4392	5040	vbc.exe	93
PID 5040 wrote to memory of 4392	5040	vbc.exe	93

C:\Users\Admin\AppData\Local\Temp\8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8f4ca87cc028e9a6479df77f44ddfc55_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4936
- 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
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5040
- - C:\MSDCSC\msdcsc.exe
    "C:\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\MSDCSC\msdcsc.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/4936-0-0x0000000074FA2000-0x0000000074FA3000-memory.dmp

Filesize
4KB

Download
memory/4936-1-0x0000000074FA0000-0x0000000075551000-memory.dmp

Filesize
5.7MB

Download
memory/4936-2-0x0000000074FA0000-0x0000000075551000-memory.dmp

Filesize
5.7MB

Download
memory/4936-10-0x0000000074FA0000-0x0000000075551000-memory.dmp

Filesize
5.7MB

Download
memory/5040-3-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download
memory/5040-4-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download
memory/5040-5-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download
memory/5040-8-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download
memory/5040-9-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download
memory/5040-62-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads