darkcomet | 09f78205549095fa583201ea63d81cd5c8f2a7c65ff620c8dd251849d7093565

Analysis

max time kernel
151s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
19/10/2022, 23:37

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General

Target

09f78205549095fa583201ea63d81cd5c8f2a7c65ff620c8dd251849d7093565.exe
Size

708KB
MD5

a136f80eebdb57bdebe406825c86d750
SHA1

83540c8b382854b67530efdca9bf46d649a8dc36
SHA256

09f78205549095fa583201ea63d81cd5c8f2a7c65ff620c8dd251849d7093565
SHA512

0cb287b3b5b7a7e086510d8d134fb8d497174f2f542a59e91cd63d77c6220b5be189774f8e1cbb5b7e7dc3a3635911182a435da263ee6910f1933a3791715589
SSDEEP

12288:wSS2Zdio6T+hWjxyNRh4gGJzEW0YQmvelqx2RgZM1/vXkHiBl3M:w72ZdoTKWj8NR+gGaW0YRv9x2R3v0CB

Score

10^/10

darkcomet guest16 persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

mafiausax.no-ip.org:1333

Mutex

DC_MUTEX-0W6K1RW

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
KaiNiaKuj5AE
install
true
offline_keylogger
true
password
0123456789
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

T1004

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

Executes dropped EXE 2 IoCs

pid	Process
4988	explorer.exe
3916	msdcsc.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	09f78205549095fa583201ea63d81cd5c8f2a7c65ff620c8dd251849d7093565.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\18.exe = "C:\\Users\\Admin\\AppData\\RoamingMicrosoft\\System\\Services\\18.exe"	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\18.exe = "C:\\Users\\Admin\\AppData\\RoamingMicrosoft\\System\\Services\\18.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4988 set thread context of 4932	4988	explorer.exe	82

Drops file in Windows directory 3 IoCs

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

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

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	4932	vbc.exe
Token: SeSecurityPrivilege	4932	vbc.exe
Token: SeTakeOwnershipPrivilege	4932	vbc.exe
Token: SeLoadDriverPrivilege	4932	vbc.exe
Token: SeSystemProfilePrivilege	4932	vbc.exe
Token: SeSystemtimePrivilege	4932	vbc.exe
Token: SeProfSingleProcessPrivilege	4932	vbc.exe
Token: SeIncBasePriorityPrivilege	4932	vbc.exe
Token: SeCreatePagefilePrivilege	4932	vbc.exe
Token: SeBackupPrivilege	4932	vbc.exe
Token: SeRestorePrivilege	4932	vbc.exe
Token: SeShutdownPrivilege	4932	vbc.exe
Token: SeDebugPrivilege	4932	vbc.exe
Token: SeSystemEnvironmentPrivilege	4932	vbc.exe
Token: SeChangeNotifyPrivilege	4932	vbc.exe
Token: SeRemoteShutdownPrivilege	4932	vbc.exe
Token: SeUndockPrivilege	4932	vbc.exe
Token: SeManageVolumePrivilege	4932	vbc.exe
Token: SeImpersonatePrivilege	4932	vbc.exe
Token: SeCreateGlobalPrivilege	4932	vbc.exe
Token: 33	4932	vbc.exe
Token: 34	4932	vbc.exe
Token: 35	4932	vbc.exe
Token: 36	4932	vbc.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 4236 wrote to memory of 4988	4236	09f78205549095fa583201ea63d81cd5c8f2a7c65ff620c8dd251849d7093565.exe	81
PID 4236 wrote to memory of 4988	4236	09f78205549095fa583201ea63d81cd5c8f2a7c65ff620c8dd251849d7093565.exe	81
PID 4236 wrote to memory of 4988	4236	09f78205549095fa583201ea63d81cd5c8f2a7c65ff620c8dd251849d7093565.exe	81
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4988 wrote to memory of 4932	4988	explorer.exe	82
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 2076	4932	vbc.exe	84
PID 4932 wrote to memory of 3916	4932	vbc.exe	85
PID 4932 wrote to memory of 3916	4932	vbc.exe	85
PID 4932 wrote to memory of 3916	4932	vbc.exe	85

C:\Users\Admin\AppData\Local\Temp\09f78205549095fa583201ea63d81cd5c8f2a7c65ff620c8dd251849d7093565.exe
"C:\Users\Admin\AppData\Local\Temp\09f78205549095fa583201ea63d81cd5c8f2a7c65ff620c8dd251849d7093565.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Users\Admin\AppData\Roaming\explorer.exe
  "C:\Users\Admin\AppData\Roaming\explorer.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:4988
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    3⤵
    - Modifies WinLogon for persistence
    - Adds Run key to start application
    - Drops file in Windows directory
    - Modifies registry class
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4932
  - - C:\Windows\SysWOW64\notepad.exe
      notepad
      4⤵
      PID:2076
  - - C:\Windows\MSDCSC\msdcsc.exe
      "C:\Windows\MSDCSC\msdcsc.exe"
      4⤵
      Executes dropped EXE
      PID:3916

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

T1064

Persistence

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Scripting

T1064

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\explorer.exe

Filesize
708KB

MD5
a136f80eebdb57bdebe406825c86d750

SHA1
83540c8b382854b67530efdca9bf46d649a8dc36

SHA256
09f78205549095fa583201ea63d81cd5c8f2a7c65ff620c8dd251849d7093565

SHA512
0cb287b3b5b7a7e086510d8d134fb8d497174f2f542a59e91cd63d77c6220b5be189774f8e1cbb5b7e7dc3a3635911182a435da263ee6910f1933a3791715589

Download Submit
C:\Users\Admin\AppData\Roaming\explorer.exe

Filesize
708KB

MD5
a136f80eebdb57bdebe406825c86d750

SHA1
83540c8b382854b67530efdca9bf46d649a8dc36

SHA256
09f78205549095fa583201ea63d81cd5c8f2a7c65ff620c8dd251849d7093565

SHA512
0cb287b3b5b7a7e086510d8d134fb8d497174f2f542a59e91cd63d77c6220b5be189774f8e1cbb5b7e7dc3a3635911182a435da263ee6910f1933a3791715589

Download Submit
C:\Windows\MSDCSC\msdcsc.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Windows\MSDCSC\msdcsc.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/4236-132-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/4236-136-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/4932-140-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4932-141-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4932-143-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4932-144-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4932-139-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4932-148-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4988-142-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/4988-137-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads