darkcomet | 553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69a

Analysis

max time kernel
117s
max time network
117s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
05/10/2024, 17:26

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General

Target

553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe
Size

1.3MB
MD5

00004abf734a7d34d6665e1daea238c0
SHA1

07efc6830c9128c25c88cf6401af2b01442274f2
SHA256

553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69a
SHA512

d5e8f252fe45d6276cbaee48fbd73e38d9c093f77fbd7d9f392556a619e5865f6e3df9d78c89f7ed49971fd2e9aca88a6f7ab7324300a9c9c0c47043ffe5aeb7
SSDEEP

24576:k4lavt0LkLL9IMixoEgeany0Bex3XgoOvOr8FozBi2eoTq9MmCS:zkwkn9IMHeany063Xgxv+ZzBOqaPCS

Score

10^/10

darkcomet guest16 discovery persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

10.10.0.100:1604

Mutex

DC_MUTEX-F54S21D

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
jXmwh2j5mvF3
install
true
offline_keylogger
true
persistence
false
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\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	1622.exe

Executes dropped EXE 2 IoCs

pid	Process
2780	1622.exe
2636	msdcsc.exe

Loads dropped DLL 7 IoCs

pid	Process
2188	553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe
2188	553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe
2188	553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe
2188	553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe
2188	553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe
2780	1622.exe
2780	1622.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	1622.exe

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x000800000001930d-10.dat	upx
behavioral1/memory/2780-27-0x0000000000400000-0x00000000004EA000-memory.dmp	upx
behavioral1/memory/2780-37-0x0000000003FE0000-0x00000000040CA000-memory.dmp	upx
behavioral1/memory/2780-43-0x0000000000400000-0x00000000004EA000-memory.dmp	upx
behavioral1/memory/2636-44-0x0000000000400000-0x00000000004EA000-memory.dmp	upx
behavioral1/memory/2636-45-0x0000000000400000-0x00000000004EA000-memory.dmp	upx
behavioral1/memory/2636-48-0x0000000000400000-0x00000000004EA000-memory.dmp	upx

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	553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1622.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2780	1622.exe
Token: SeSecurityPrivilege	2780	1622.exe
Token: SeTakeOwnershipPrivilege	2780	1622.exe
Token: SeLoadDriverPrivilege	2780	1622.exe
Token: SeSystemProfilePrivilege	2780	1622.exe
Token: SeSystemtimePrivilege	2780	1622.exe
Token: SeProfSingleProcessPrivilege	2780	1622.exe
Token: SeIncBasePriorityPrivilege	2780	1622.exe
Token: SeCreatePagefilePrivilege	2780	1622.exe
Token: SeBackupPrivilege	2780	1622.exe
Token: SeRestorePrivilege	2780	1622.exe
Token: SeShutdownPrivilege	2780	1622.exe
Token: SeDebugPrivilege	2780	1622.exe
Token: SeSystemEnvironmentPrivilege	2780	1622.exe
Token: SeChangeNotifyPrivilege	2780	1622.exe
Token: SeRemoteShutdownPrivilege	2780	1622.exe
Token: SeUndockPrivilege	2780	1622.exe
Token: SeManageVolumePrivilege	2780	1622.exe
Token: SeImpersonatePrivilege	2780	1622.exe
Token: SeCreateGlobalPrivilege	2780	1622.exe
Token: 33	2780	1622.exe
Token: 34	2780	1622.exe
Token: 35	2780	1622.exe
Token: SeIncreaseQuotaPrivilege	2636	msdcsc.exe
Token: SeSecurityPrivilege	2636	msdcsc.exe
Token: SeTakeOwnershipPrivilege	2636	msdcsc.exe
Token: SeLoadDriverPrivilege	2636	msdcsc.exe
Token: SeSystemProfilePrivilege	2636	msdcsc.exe
Token: SeSystemtimePrivilege	2636	msdcsc.exe
Token: SeProfSingleProcessPrivilege	2636	msdcsc.exe
Token: SeIncBasePriorityPrivilege	2636	msdcsc.exe
Token: SeCreatePagefilePrivilege	2636	msdcsc.exe
Token: SeBackupPrivilege	2636	msdcsc.exe
Token: SeRestorePrivilege	2636	msdcsc.exe
Token: SeShutdownPrivilege	2636	msdcsc.exe
Token: SeDebugPrivilege	2636	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	2636	msdcsc.exe
Token: SeChangeNotifyPrivilege	2636	msdcsc.exe
Token: SeRemoteShutdownPrivilege	2636	msdcsc.exe
Token: SeUndockPrivilege	2636	msdcsc.exe
Token: SeManageVolumePrivilege	2636	msdcsc.exe
Token: SeImpersonatePrivilege	2636	msdcsc.exe
Token: SeCreateGlobalPrivilege	2636	msdcsc.exe
Token: 33	2636	msdcsc.exe
Token: 34	2636	msdcsc.exe
Token: 35	2636	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2636	msdcsc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 2780	2188	553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe	30
PID 2188 wrote to memory of 2780	2188	553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe	30
PID 2188 wrote to memory of 2780	2188	553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe	30
PID 2188 wrote to memory of 2780	2188	553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe	30
PID 2780 wrote to memory of 2636	2780	1622.exe	31
PID 2780 wrote to memory of 2636	2780	1622.exe	31
PID 2780 wrote to memory of 2636	2780	1622.exe	31
PID 2780 wrote to memory of 2636	2780	1622.exe	31

C:\Users\Admin\AppData\Local\Temp\553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe
"C:\Users\Admin\AppData\Local\Temp\553b073e141c065f89e2247511c1e8fbabb624c71e07ff1e38b14197c336c69aN.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2188
- C:\Users\Admin\AppData\Local\Temp\1622\1622.exe
  "C:\Users\Admin\AppData\Local\Temp\1622\1622.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:2780
- - 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
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2636

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 Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\1622\1622.exe

Filesize
350KB

MD5
2131236ee48e6cdbfeca736d00e30d3e

SHA1
3713c5e2ace20d8bd701df432787593805ffdd8b

SHA256
a327f9ba814ea744cc411f09cb13df1caf1b1ec16faad90dfd16b7437d86700b

SHA512
30cbc3ae757774d7de34b291f5a8213e95b6310b8c046dd07ee9ebf49f11dd19ee1866939a94a9b0f6ca9b926b7c2c1f4728907ed7624d6f3e8dc89f999e58f5

Download Submit
memory/2188-17-0x0000000003C80000-0x0000000003D6A000-memory.dmp

Filesize
936KB

Download
memory/2188-16-0x0000000003C80000-0x0000000003D6A000-memory.dmp

Filesize
936KB

Download
memory/2636-44-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download
memory/2636-45-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download
memory/2636-48-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download
memory/2780-27-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download
memory/2780-30-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2780-37-0x0000000003FE0000-0x00000000040CA000-memory.dmp

Filesize
936KB

Download
memory/2780-43-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads