darkcomet | 9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9

Analysis

max time kernel
149s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
21/02/2025, 04:31

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General

Target
9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Size 349KB
Sample250221-e5r6sstkfm
SHA256 9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9
MD5 ebef4f6c9ac0f0745df09a213224741d
SHA1 25e2d51e8be6e517822833fcb435cb772dfa49a9
SHA512 ecc5a3cd54b3a92f359e1628739f361a1f26c03c19b6c454482c93a1e33c583454725bbda7b5cc98ee9d8b72ae8c1bf9e6b75b1f4ca0b248d4cf1f0cdd8cf3f8
SSDEEP 6144:QcNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37aplvccV:QcW7KEZlPzCy372UcV
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet guest16 defense_evasion discovery persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

5.178.3.137:1604

Mutex

DC_MUTEX-R0H3Q6N

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
7JuUygohJeRF
install
true
offline_keylogger
true
persistence
false
reg_key
MicroUpdate

rc4.plain

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\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
1844	attrib.exe
4284	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-1-5-21-2593460650-190333679-3676257533-1000\Control Panel\International\Geo\Nation	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe

Executes dropped EXE 1 IoCs

pid	Process
1808	msdcsc.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-1-5-21-2593460650-190333679-3676257533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1128-0-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/files/0x000b000000023c41-6.dat	upx
behavioral2/memory/1128-17-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/1808-18-0x0000000000400000-0x00000000004E8000-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 7 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	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeSecurityPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeTakeOwnershipPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeLoadDriverPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeSystemProfilePrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeSystemtimePrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeProfSingleProcessPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeIncBasePriorityPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeCreatePagefilePrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeBackupPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeRestorePrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeShutdownPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeDebugPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeSystemEnvironmentPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeChangeNotifyPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeRemoteShutdownPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeUndockPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeManageVolumePrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeImpersonatePrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeCreateGlobalPrivilege	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: 33	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: 34	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: 35	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: 36	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
Token: SeIncreaseQuotaPrivilege	1808	msdcsc.exe
Token: SeSecurityPrivilege	1808	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1808	msdcsc.exe
Token: SeLoadDriverPrivilege	1808	msdcsc.exe
Token: SeSystemProfilePrivilege	1808	msdcsc.exe
Token: SeSystemtimePrivilege	1808	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1808	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1808	msdcsc.exe
Token: SeCreatePagefilePrivilege	1808	msdcsc.exe
Token: SeBackupPrivilege	1808	msdcsc.exe
Token: SeRestorePrivilege	1808	msdcsc.exe
Token: SeShutdownPrivilege	1808	msdcsc.exe
Token: SeDebugPrivilege	1808	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1808	msdcsc.exe
Token: SeChangeNotifyPrivilege	1808	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1808	msdcsc.exe
Token: SeUndockPrivilege	1808	msdcsc.exe
Token: SeManageVolumePrivilege	1808	msdcsc.exe
Token: SeImpersonatePrivilege	1808	msdcsc.exe
Token: SeCreateGlobalPrivilege	1808	msdcsc.exe
Token: 33	1808	msdcsc.exe
Token: 34	1808	msdcsc.exe
Token: 35	1808	msdcsc.exe
Token: 36	1808	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1808	msdcsc.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 1128 wrote to memory of 1916	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe	87
PID 1128 wrote to memory of 1916	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe	87
PID 1128 wrote to memory of 1916	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe	87
PID 1128 wrote to memory of 5020	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe	89
PID 1128 wrote to memory of 5020	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe	89
PID 1128 wrote to memory of 5020	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe	89
PID 1916 wrote to memory of 1844	1916	cmd.exe	91
PID 1916 wrote to memory of 1844	1916	cmd.exe	91
PID 1916 wrote to memory of 1844	1916	cmd.exe	91
PID 1128 wrote to memory of 1808	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe	92
PID 1128 wrote to memory of 1808	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe	92
PID 1128 wrote to memory of 1808	1128	9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe	92
PID 5020 wrote to memory of 4284	5020	cmd.exe	93
PID 5020 wrote to memory of 4284	5020	cmd.exe	93
PID 5020 wrote to memory of 4284	5020	cmd.exe	93
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94
PID 1808 wrote to memory of 4276	1808	msdcsc.exe	94

Views/modifies file attributes 1 TTPs 2 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
1844	attrib.exe
4284	attrib.exe

C:\Users\Admin\AppData\Local\Temp\9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe
"C:\Users\Admin\AppData\Local\Temp\9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1128
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1916
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9.exe" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:1844
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5020
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:4284
- C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
  "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1808
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4276

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

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

msdcsc.exe

Path C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
Size 349KB
SHA256 9c5d33e58b7ef0eeb97ed7fe1f74f300949e9cab6e2354b0ad1cd3dc756bfcb9
MD5 ebef4f6c9ac0f0745df09a213224741d
SHA1 25e2d51e8be6e517822833fcb435cb772dfa49a9
SHA512 ecc5a3cd54b3a92f359e1628739f361a1f26c03c19b6c454482c93a1e33c583454725bbda7b5cc98ee9d8b72ae8c1bf9e6b75b1f4ca0b248d4cf1f0cdd8cf3f8
SSDEEP 6144:QcNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37aplvccV:QcW7KEZlPzCy372UcV
MD5 SHA1 SHA512 SSDEEP

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memory/1128-0-0x0000000000400000-0x00000000004E8000-memory.dmp

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memory/1128-1-0x0000000000690000-0x0000000000691000-memory.dmp

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memory/1128-17-0x0000000000400000-0x00000000004E8000-memory.dmp

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memory/1808-15-0x0000000000AC0000-0x0000000000AC1000-memory.dmp

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memory/1808-18-0x0000000000400000-0x00000000004E8000-memory.dmp

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memory/4276-16-0x0000000000800000-0x0000000000801000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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