darkcomet | 596742e436c3a63ade42e1f91bb00364a21a3ed3f742122dbe0368280e8f02e9

General

Target

d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe
Size

1.0MB
MD5

d3aa661e379ab45d42e977fe6440320d
SHA1

d3033071d5e7e099eb1292ac1c29a1ccf9ddc29d
SHA256

596742e436c3a63ade42e1f91bb00364a21a3ed3f742122dbe0368280e8f02e9
SHA512

2bb2a2678dfd01b47c9617f9d72e9eba589fbebdc074019e0e8776f6575441ca2971252df447648f2c423a0630c49a19a4852e430288e20e763f12cf97ae83a1
SSDEEP

24576:n+t551zGlKYkNmyASIHZmHmHMcbG3tbxp1aL9g:n+t55dGimyASIoHmsfbxpE

Score

10^/10

darkcomet guest16 discovery persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

68.194.136.134:1604

Mutex

DC_MUTEX-G293ZDW

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
qG1EhGAmh8HK
install
true
offline_keylogger
true
persistence
false
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\\Documents\\MSDCSC\\msdcsc.exe"	WinSec.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	WinSec.exe

Executes dropped EXE 2 IoCs

pid	Process
4568	WinSec.exe
976	msdcsc.exe

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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	WinSec.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3896 set thread context of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83

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 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WinSec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe

Modifies registry class 1 IoCs

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

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4568	WinSec.exe
Token: SeSecurityPrivilege	4568	WinSec.exe
Token: SeTakeOwnershipPrivilege	4568	WinSec.exe
Token: SeLoadDriverPrivilege	4568	WinSec.exe
Token: SeSystemProfilePrivilege	4568	WinSec.exe
Token: SeSystemtimePrivilege	4568	WinSec.exe
Token: SeProfSingleProcessPrivilege	4568	WinSec.exe
Token: SeIncBasePriorityPrivilege	4568	WinSec.exe
Token: SeCreatePagefilePrivilege	4568	WinSec.exe
Token: SeBackupPrivilege	4568	WinSec.exe
Token: SeRestorePrivilege	4568	WinSec.exe
Token: SeShutdownPrivilege	4568	WinSec.exe
Token: SeDebugPrivilege	4568	WinSec.exe
Token: SeSystemEnvironmentPrivilege	4568	WinSec.exe
Token: SeChangeNotifyPrivilege	4568	WinSec.exe
Token: SeRemoteShutdownPrivilege	4568	WinSec.exe
Token: SeUndockPrivilege	4568	WinSec.exe
Token: SeManageVolumePrivilege	4568	WinSec.exe
Token: SeImpersonatePrivilege	4568	WinSec.exe
Token: SeCreateGlobalPrivilege	4568	WinSec.exe
Token: 33	4568	WinSec.exe
Token: 34	4568	WinSec.exe
Token: 35	4568	WinSec.exe
Token: 36	4568	WinSec.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 3896 wrote to memory of 4568	3896	d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe	83
PID 4568 wrote to memory of 976	4568	WinSec.exe	84
PID 4568 wrote to memory of 976	4568	WinSec.exe	84
PID 4568 wrote to memory of 976	4568	WinSec.exe	84

C:\Users\Admin\AppData\Local\Temp\d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d3aa661e379ab45d42e977fe6440320d_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3896
- C:\Users\Admin\AppData\Roaming\WinSec.exe
  C:\Users\Admin\AppData\Roaming\WinSec.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4568
- - C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
    "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:976

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Query Registry

1

T1012

System Information Discovery

2

T1082

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:\Users\Admin\AppData\Roaming\WinSec.exe

Filesize
34KB

MD5
e118330b4629b12368d91b9df6488be0

SHA1
ce90218c7e3b90df2a3409ec253048bb6472c2fd

SHA256
3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

SHA512
ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

Download Submit
memory/3896-0-0x0000000074722000-0x0000000074723000-memory.dmp

Filesize
4KB

Download
memory/3896-1-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/3896-2-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/3896-10-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/4568-5-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4568-8-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4568-11-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4568-13-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4568-14-0x00000000022E0000-0x00000000022E1000-memory.dmp

Filesize
4KB

Download
memory/4568-75-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads