darkcomet | e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca

Analysis

max time kernel
142s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14/04/2024, 02:45

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General

Target
e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe
Size 1.1MB
Sample240414-c85j7ade62
SHA256 e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca
MD5 e88bab5d7caf5f30f87e56fce21b8eb4
SHA1 32bf71fcec9a64e9d8adf36201b15803a9d5812d
SHA512 7cff1f10c83247257d30508ac9d8aa6a12bd1f536bcc3aee95b61144584d839e350d38f3fc1cf11b4b1da6530e5191291af1bfdbf8c906e124b7abcf14e5f3e1
SSDEEP 24576:mJwXnr79xF09allHpm/rhUZqACJy5aGU:mu3rl7PmThVAOycGU
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet crypter evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

crypter

184.144.223.8:51800
overcrash.no-ip.biz:51800

Mutex

DC_MUTEX-E5P79CY

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
7LSrP3sXvcog
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

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

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
4828	attrib.exe
2168	attrib.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	vbc.exe

Executes dropped EXE 2 IoCs

pid	Process
4856	vbc.exe
1776	msdcsc.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

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\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 3968 set thread context of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90

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

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	4856	vbc.exe
Token: SeSecurityPrivilege	4856	vbc.exe
Token: SeTakeOwnershipPrivilege	4856	vbc.exe
Token: SeLoadDriverPrivilege	4856	vbc.exe
Token: SeSystemProfilePrivilege	4856	vbc.exe
Token: SeSystemtimePrivilege	4856	vbc.exe
Token: SeProfSingleProcessPrivilege	4856	vbc.exe
Token: SeIncBasePriorityPrivilege	4856	vbc.exe
Token: SeCreatePagefilePrivilege	4856	vbc.exe
Token: SeBackupPrivilege	4856	vbc.exe
Token: SeRestorePrivilege	4856	vbc.exe
Token: SeShutdownPrivilege	4856	vbc.exe
Token: SeDebugPrivilege	4856	vbc.exe
Token: SeSystemEnvironmentPrivilege	4856	vbc.exe
Token: SeChangeNotifyPrivilege	4856	vbc.exe
Token: SeRemoteShutdownPrivilege	4856	vbc.exe
Token: SeUndockPrivilege	4856	vbc.exe
Token: SeManageVolumePrivilege	4856	vbc.exe
Token: SeImpersonatePrivilege	4856	vbc.exe
Token: SeCreateGlobalPrivilege	4856	vbc.exe
Token: 33	4856	vbc.exe
Token: 34	4856	vbc.exe
Token: 35	4856	vbc.exe
Token: 36	4856	vbc.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 3968 wrote to memory of 4856	3968	e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe	90
PID 4856 wrote to memory of 3232	4856	vbc.exe	91
PID 4856 wrote to memory of 3232	4856	vbc.exe	91
PID 4856 wrote to memory of 3232	4856	vbc.exe	91
PID 4856 wrote to memory of 2912	4856	vbc.exe	93
PID 4856 wrote to memory of 2912	4856	vbc.exe	93
PID 4856 wrote to memory of 2912	4856	vbc.exe	93
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 4856 wrote to memory of 220	4856	vbc.exe	95
PID 2912 wrote to memory of 4828	2912	cmd.exe	96
PID 2912 wrote to memory of 4828	2912	cmd.exe	96
PID 2912 wrote to memory of 4828	2912	cmd.exe	96
PID 3232 wrote to memory of 2168	3232	cmd.exe	97
PID 3232 wrote to memory of 2168	3232	cmd.exe	97
PID 3232 wrote to memory of 2168	3232	cmd.exe	97
PID 4856 wrote to memory of 1776	4856	vbc.exe	98
PID 4856 wrote to memory of 1776	4856	vbc.exe	98
PID 4856 wrote to memory of 1776	4856	vbc.exe	98

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2168	attrib.exe
4828	attrib.exe

C:\Users\Admin\AppData\Local\Temp\e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe
"C:\Users\Admin\AppData\Local\Temp\e78da21d88d678da382cf9f10be55d75ce6f5d438fc2bb6471f82a51575ae1ca.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  C:\Users\Admin\AppData\Local\Temp\vbc.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4856
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\vbc.exe" +s +h
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3232
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Users\Admin\AppData\Local\Temp\vbc.exe" +s +h
      4⤵
      Sets file to hidden
      Views/modifies file attributes
      PID:2168
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2912
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      4⤵
      Sets file to hidden
      Views/modifies file attributes
      PID:4828
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    PID:220
- - C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
    "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    PID:1776

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1420 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
1⤵
PID:1156

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

T1064

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

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

vbc.exe

Path C:\Users\Admin\AppData\Local\Temp\vbc.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/220-18-0x00000000001E0000-0x00000000001E1000-memory.dmp

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memory/3968-0-0x0000000075120000-0x00000000756D1000-memory.dmp

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memory/3968-1-0x0000000075120000-0x00000000756D1000-memory.dmp

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memory/3968-2-0x0000000000D50000-0x0000000000D60000-memory.dmp

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memory/3968-11-0x0000000075120000-0x00000000756D1000-memory.dmp

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memory/4856-5-0x0000000000400000-0x00000000004BA000-memory.dmp

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memory/4856-9-0x0000000000400000-0x00000000004BA000-memory.dmp

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memory/4856-10-0x0000000000400000-0x00000000004BA000-memory.dmp

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memory/4856-13-0x0000000000400000-0x00000000004BA000-memory.dmp

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memory/4856-14-0x0000000000A40000-0x0000000000A41000-memory.dmp

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memory/4856-77-0x0000000000400000-0x00000000004BA000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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