darkcomet | f0f5e34f413e2e22777ad229f003759e0e56b4a038974b85e930611067cb84e7

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
29-11-2024 03:38

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General

Target

aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
Size

716KB
MD5

aea6da14381b2b35443ede64825c992c
SHA1

3c13c5b0553041bfae7d8c2c790ec63d79cca0e1
SHA256

f0f5e34f413e2e22777ad229f003759e0e56b4a038974b85e930611067cb84e7
SHA512

86557e50b51d4058b3e3a50af6f429ed0520042b0af606739b82aa322e7e7d9c7d80f81c558969f5e12287b08bdd5e06818145c813b6b80a2c8f2c79011b3398
SSDEEP

12288:7VLJOQr8WcV3wOhm4MbM2ev/B2f4f1nON+1Gs9ijVb6ep254:7VLJOPWcV3rhYincaGs9ij4e24

Score

10^/10

darkcomet guest17 discovery persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest17

127.0.0.1:1604

Mutex

DC_MUTEX-74G4G59

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
rNRrNWNwGAgT
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"	cvtres.exe

Executes dropped EXE 1 IoCs

pid	Process
2308	msdcsc.exe

Loads dropped DLL 1 IoCs

pid	Process
2804	cvtres.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-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	cvtres.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2232 set thread context of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30

System Location Discovery: System Language Discovery 1 TTPs 4 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	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cvtres.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeDebugPrivilege	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	2804	cvtres.exe
Token: SeSecurityPrivilege	2804	cvtres.exe
Token: SeTakeOwnershipPrivilege	2804	cvtres.exe
Token: SeLoadDriverPrivilege	2804	cvtres.exe
Token: SeSystemProfilePrivilege	2804	cvtres.exe
Token: SeSystemtimePrivilege	2804	cvtres.exe
Token: SeProfSingleProcessPrivilege	2804	cvtres.exe
Token: SeIncBasePriorityPrivilege	2804	cvtres.exe
Token: SeCreatePagefilePrivilege	2804	cvtres.exe
Token: SeBackupPrivilege	2804	cvtres.exe
Token: SeRestorePrivilege	2804	cvtres.exe
Token: SeShutdownPrivilege	2804	cvtres.exe
Token: SeDebugPrivilege	2804	cvtres.exe
Token: SeSystemEnvironmentPrivilege	2804	cvtres.exe
Token: SeChangeNotifyPrivilege	2804	cvtres.exe
Token: SeRemoteShutdownPrivilege	2804	cvtres.exe
Token: SeUndockPrivilege	2804	cvtres.exe
Token: SeManageVolumePrivilege	2804	cvtres.exe
Token: SeImpersonatePrivilege	2804	cvtres.exe
Token: SeCreateGlobalPrivilege	2804	cvtres.exe
Token: 33	2804	cvtres.exe
Token: 34	2804	cvtres.exe
Token: 35	2804	cvtres.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2232 wrote to memory of 2804	2232	aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe	30
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2900	2804	cvtres.exe	31
PID 2804 wrote to memory of 2308	2804	cvtres.exe	32
PID 2804 wrote to memory of 2308	2804	cvtres.exe	32
PID 2804 wrote to memory of 2308	2804	cvtres.exe	32
PID 2804 wrote to memory of 2308	2804	cvtres.exe	32

C:\Users\Admin\AppData\Local\Temp\aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\aea6da14381b2b35443ede64825c992c_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
  2⤵
  - Modifies WinLogon for persistence
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2804
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2900
- - C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
    "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2308

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

Modify Registry

T1112

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

C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
memory/2232-0-0x0000000074461000-0x0000000074462000-memory.dmp

Filesize
4KB

Download
memory/2232-1-0x0000000074460000-0x0000000074A0B000-memory.dmp

Filesize
5.7MB

Download
memory/2232-2-0x0000000074460000-0x0000000074A0B000-memory.dmp

Filesize
5.7MB

Download
memory/2232-17-0x0000000074460000-0x0000000074A0B000-memory.dmp

Filesize
5.7MB

Download
memory/2804-15-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-18-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2804-12-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-11-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-8-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-9-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-7-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-5-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-16-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-10-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-19-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-20-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-47-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2804-3-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2900-24-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/2900-39-0x0000000000190000-0x0000000000191000-memory.dmp

Filesize
4KB

Download