darkcomet | 3bf032577952a04273183885d393909cc88df592592b3931bbb2be09d76f6406

General

Target

Premium.exe
Size

1.1MB
MD5

0041c0d1fca736e86788f404a4a59ab8
SHA1

cc23f6e0c6e3c756cb167ca9e3b060f90e5e5754
SHA256

95d70ba84714f2471a57df471b583ecaade7936aa4f92783477441413813f3bd
SHA512

8cf90fb9423155304909514deddff8afd3cb31d480adebf05633f85237357f5e96ccbff01b3f3b27b490969f7983edeb32717d5ad41c5eb7213c79f9f65e2924
SSDEEP

24576:V6yr5Ms1sZAnfOUibyKbCaUvaTRb+zQy74r:V1sOxRk+R4

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

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"	vbc.exe

Executes dropped EXE 2 IoCs

pid	Process
1560	vbc.exe
1644	msdcsc.exe

Loads dropped DLL 2 IoCs

pid	Process
1728	Premium.exe
1560	vbc.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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\WinUpdtr = "C:\\Users\\Admin\\AppData\\Roaming\\WinUpdtr\\Premium.exe"	Premium.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1728 set thread context of 1560	1728	Premium.exe	31

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	msdcsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Premium.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1560	vbc.exe
Token: SeSecurityPrivilege	1560	vbc.exe
Token: SeTakeOwnershipPrivilege	1560	vbc.exe
Token: SeLoadDriverPrivilege	1560	vbc.exe
Token: SeSystemProfilePrivilege	1560	vbc.exe
Token: SeSystemtimePrivilege	1560	vbc.exe
Token: SeProfSingleProcessPrivilege	1560	vbc.exe
Token: SeIncBasePriorityPrivilege	1560	vbc.exe
Token: SeCreatePagefilePrivilege	1560	vbc.exe
Token: SeBackupPrivilege	1560	vbc.exe
Token: SeRestorePrivilege	1560	vbc.exe
Token: SeShutdownPrivilege	1560	vbc.exe
Token: SeDebugPrivilege	1560	vbc.exe
Token: SeSystemEnvironmentPrivilege	1560	vbc.exe
Token: SeChangeNotifyPrivilege	1560	vbc.exe
Token: SeRemoteShutdownPrivilege	1560	vbc.exe
Token: SeUndockPrivilege	1560	vbc.exe
Token: SeManageVolumePrivilege	1560	vbc.exe
Token: SeImpersonatePrivilege	1560	vbc.exe
Token: SeCreateGlobalPrivilege	1560	vbc.exe
Token: 33	1560	vbc.exe
Token: 34	1560	vbc.exe
Token: 35	1560	vbc.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1728 wrote to memory of 1560	1728	Premium.exe	31
PID 1560 wrote to memory of 1644	1560	vbc.exe	32
PID 1560 wrote to memory of 1644	1560	vbc.exe	32
PID 1560 wrote to memory of 1644	1560	vbc.exe	32
PID 1560 wrote to memory of 1644	1560	vbc.exe	32

C:\Users\Admin\AppData\Local\Temp\Premium.exe
"C:\Users\Admin\AppData\Local\Temp\Premium.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1728
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  C:\Users\Admin\AppData\Local\Temp\vbc.exe
  2⤵
  - 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:1560
- - 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:1644

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 Information Discovery

1

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\Documents\MSDCSC\msdcsc.exe

Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
memory/1560-27-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-13-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-28-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-30-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-21-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-10-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-42-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-29-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-23-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1560-9-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-17-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-19-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-16-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-11-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1560-25-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1728-2-0x0000000074590000-0x0000000074B3B000-memory.dmp

Filesize
5.7MB

Download
memory/1728-34-0x0000000074590000-0x0000000074B3B000-memory.dmp

Filesize
5.7MB

Download
memory/1728-1-0x0000000074590000-0x0000000074B3B000-memory.dmp

Filesize
5.7MB

Download
memory/1728-0-0x0000000074591000-0x0000000074592000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads