darkcomet | 0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375

Analysis

max time kernel
157s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
13/10/2022, 23:41

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General

Target
0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe
Size 1.3MB
Sample221013-3pms5sbbb3
SHA256 0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375
MD5 740979e8c116ae68b5056813fdc428b6
SHA1 811dea9b6dcf0d044785c5b668a23bb6fcf54c11
SHA512 eeb3d9b385e79335a7c377f3d59ce5687bdb6469b4bc664590ae1a1fb166999df317a70e4177a44b9df91b6058a84f7f4ead1727fdc2a314e1b6cfefa9705e2f
SSDEEP 24576:HhqmTneB7IvORHDzVMCHNeyUduGRQTa3ZB5CdN0Gs0oyQqZqy16U:HhqIedRNVNlVG+Qp8qG
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet darkcomet evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

DarkComet

darkkomet.no-ip.biz:200

Mutex

DC_MUTEX-MMS8NCR

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
9VvVQjZBhnxE
install
true
offline_keylogger
true
persistence
true
reg_key
rundll32

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:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	vbc.exe

Executes dropped EXE 1 IoCs

pid	Process
3632	msdcsc.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1158

pid	Process
1328	attrib.exe
4568	attrib.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rundll32 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	vbc.exe

Drops autorun.inf file 1 TTPs 4 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File created	C:\autorun.inf	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe
File opened for modification	C:\autorun.inf	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe
File created	D:\autorun.inf	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe
File opened for modification	D:\autorun.inf	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4744 set thread context of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727	attrib.exe
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe	attrib.exe

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	4052	vbc.exe
Token: SeSecurityPrivilege	4052	vbc.exe
Token: SeTakeOwnershipPrivilege	4052	vbc.exe
Token: SeLoadDriverPrivilege	4052	vbc.exe
Token: SeSystemProfilePrivilege	4052	vbc.exe
Token: SeSystemtimePrivilege	4052	vbc.exe
Token: SeProfSingleProcessPrivilege	4052	vbc.exe
Token: SeIncBasePriorityPrivilege	4052	vbc.exe
Token: SeCreatePagefilePrivilege	4052	vbc.exe
Token: SeBackupPrivilege	4052	vbc.exe
Token: SeRestorePrivilege	4052	vbc.exe
Token: SeShutdownPrivilege	4052	vbc.exe
Token: SeDebugPrivilege	4052	vbc.exe
Token: SeSystemEnvironmentPrivilege	4052	vbc.exe
Token: SeChangeNotifyPrivilege	4052	vbc.exe
Token: SeRemoteShutdownPrivilege	4052	vbc.exe
Token: SeUndockPrivilege	4052	vbc.exe
Token: SeManageVolumePrivilege	4052	vbc.exe
Token: SeImpersonatePrivilege	4052	vbc.exe
Token: SeCreateGlobalPrivilege	4052	vbc.exe
Token: 33	4052	vbc.exe
Token: 34	4052	vbc.exe
Token: 35	4052	vbc.exe
Token: 36	4052	vbc.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4744 wrote to memory of 4052	4744	0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe	85
PID 4052 wrote to memory of 2212	4052	vbc.exe	86
PID 4052 wrote to memory of 2212	4052	vbc.exe	86
PID 4052 wrote to memory of 2212	4052	vbc.exe	86
PID 4052 wrote to memory of 2392	4052	vbc.exe	88
PID 4052 wrote to memory of 2392	4052	vbc.exe	88
PID 4052 wrote to memory of 2392	4052	vbc.exe	88
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 4052 wrote to memory of 1440	4052	vbc.exe	90
PID 2392 wrote to memory of 4568	2392	cmd.exe	92
PID 2212 wrote to memory of 1328	2212	cmd.exe	91
PID 2212 wrote to memory of 1328	2212	cmd.exe	91
PID 2392 wrote to memory of 4568	2392	cmd.exe	92
PID 2212 wrote to memory of 1328	2212	cmd.exe	91
PID 2392 wrote to memory of 4568	2392	cmd.exe	92
PID 4052 wrote to memory of 3632	4052	vbc.exe	93
PID 4052 wrote to memory of 3632	4052	vbc.exe	93
PID 4052 wrote to memory of 3632	4052	vbc.exe	93

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1328	attrib.exe
4568	attrib.exe

C:\Users\Admin\AppData\Local\Temp\0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe
"C:\Users\Admin\AppData\Local\Temp\0fd5d17f8471e4b343dcdb56dbaad7f42e63d8498875210e68c93a850da86375.exe"
1⤵
- Drops autorun.inf file
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4744
- 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
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4052
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2212
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
      4⤵
      Sets file to hidden
      Drops file in Windows directory
      Views/modifies file attributes
      PID:1328
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2392
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
      4⤵
      Sets file to hidden
      Drops file in Windows directory
      Views/modifies file attributes
      PID:4568
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    PID:1440
- - C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
    "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    PID:3632

Network

MITRE ATT&CK Enterprise v6

Initial Access

Replication Through Removable Media

T1091

Execution

Scripting

T1064

Persistence

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

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msdcsc.exe

Path C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
Size 1.1MB
SHA256 b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0
MD5 d881de17aa8f2e2c08cbb7b265f928f9
SHA1 08936aebc87decf0af6e8eada191062b5e65ac2a
SHA512 5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34
SSDEEP 24576:jp2silPBMIXGWClfuRcUGIJYK15Qs/QZM:jp2sMO7VzUTJH15QFZM
MD5 SHA1 SHA512 SSDEEP

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msdcsc.exe

Path C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
Size 1.1MB
SHA256 b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0
MD5 d881de17aa8f2e2c08cbb7b265f928f9
SHA1 08936aebc87decf0af6e8eada191062b5e65ac2a
SHA512 5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34
SSDEEP 24576:jp2silPBMIXGWClfuRcUGIJYK15Qs/QZM:jp2sMO7VzUTJH15QFZM
MD5 SHA1 SHA512 SSDEEP

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memory/4052-136-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4052-138-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4052-137-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4052-144-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4052-135-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4052-148-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4744-132-0x0000000074AD0000-0x0000000075081000-memory.dmp

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memory/4744-133-0x0000000074AD0000-0x0000000075081000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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