darkcomet | 921b14eb6a6c544f168408805632bb83da452fe65282f4ec3ca5a6a460fc7735

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04/01/2025, 23:43

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

SteamGameAdder V9.1.0.exe
Size

756KB
MD5

0f472613d60ab2e381d7ce1efec9f0a0
SHA1

ee965531a2352e0c32385069cfd5135a0401044c
SHA256

55b4d7060a2a189fbf0311c52772c5fff93ebe80ddf02ed9f29e24ae89259585
SHA512

621f0226378aca81706ed2168124a557b4a081066f39bfa8d8d151aa3e03421c9a8943d7f7b48d20aa7736f67ea552cbf53d307dc496c1a5d180c0f4f4d39152
SSDEEP

12288:z9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/htsvv6:9Z1xuVVjfFoynPaVBUR8f+kN10EBUvv6

Score

10^/10

darkcomet guest16 discovery evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

captaindrain007.no-ip.biz:1604

Mutex

DC_MUTEX-59V53UU

Attributes

InstallPath
Sys32.exe
gencode
kectiaqbSr6n
install
true
offline_keylogger
true
persistence
false
reg_key
System32.exe

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:\\Windows\\system32\\Sys32.exe"	SteamGameAdder V9.1.0.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
4448	attrib.exe
3360	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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	SteamGameAdder V9.1.0.exe

Executes dropped EXE 1 IoCs

pid	Process
1468	Sys32.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-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System32.exe = "C:\\Windows\\system32\\Sys32.exe"	SteamGameAdder V9.1.0.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Sys32.exe	SteamGameAdder V9.1.0.exe
File opened for modification	C:\Windows\SysWOW64\Sys32.exe	SteamGameAdder V9.1.0.exe
File opened for modification	C:\Windows\SysWOW64\	SteamGameAdder V9.1.0.exe

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	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SteamGameAdder V9.1.0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Sys32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1468	Sys32.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeSecurityPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeTakeOwnershipPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeLoadDriverPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeSystemProfilePrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeSystemtimePrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeProfSingleProcessPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeIncBasePriorityPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeCreatePagefilePrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeBackupPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeRestorePrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeShutdownPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeDebugPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeSystemEnvironmentPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeChangeNotifyPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeRemoteShutdownPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeUndockPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeManageVolumePrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeImpersonatePrivilege	4816	SteamGameAdder V9.1.0.exe
Token: SeCreateGlobalPrivilege	4816	SteamGameAdder V9.1.0.exe
Token: 33	4816	SteamGameAdder V9.1.0.exe
Token: 34	4816	SteamGameAdder V9.1.0.exe
Token: 35	4816	SteamGameAdder V9.1.0.exe
Token: 36	4816	SteamGameAdder V9.1.0.exe
Token: SeIncreaseQuotaPrivilege	1468	Sys32.exe
Token: SeSecurityPrivilege	1468	Sys32.exe
Token: SeTakeOwnershipPrivilege	1468	Sys32.exe
Token: SeLoadDriverPrivilege	1468	Sys32.exe
Token: SeSystemProfilePrivilege	1468	Sys32.exe
Token: SeSystemtimePrivilege	1468	Sys32.exe
Token: SeProfSingleProcessPrivilege	1468	Sys32.exe
Token: SeIncBasePriorityPrivilege	1468	Sys32.exe
Token: SeCreatePagefilePrivilege	1468	Sys32.exe
Token: SeBackupPrivilege	1468	Sys32.exe
Token: SeRestorePrivilege	1468	Sys32.exe
Token: SeShutdownPrivilege	1468	Sys32.exe
Token: SeDebugPrivilege	1468	Sys32.exe
Token: SeSystemEnvironmentPrivilege	1468	Sys32.exe
Token: SeChangeNotifyPrivilege	1468	Sys32.exe
Token: SeRemoteShutdownPrivilege	1468	Sys32.exe
Token: SeUndockPrivilege	1468	Sys32.exe
Token: SeManageVolumePrivilege	1468	Sys32.exe
Token: SeImpersonatePrivilege	1468	Sys32.exe
Token: SeCreateGlobalPrivilege	1468	Sys32.exe
Token: 33	1468	Sys32.exe
Token: 34	1468	Sys32.exe
Token: 35	1468	Sys32.exe
Token: 36	1468	Sys32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1468	Sys32.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 4816 wrote to memory of 1064	4816	SteamGameAdder V9.1.0.exe	82
PID 4816 wrote to memory of 1064	4816	SteamGameAdder V9.1.0.exe	82
PID 4816 wrote to memory of 1064	4816	SteamGameAdder V9.1.0.exe	82
PID 4816 wrote to memory of 4872	4816	SteamGameAdder V9.1.0.exe	83
PID 4816 wrote to memory of 4872	4816	SteamGameAdder V9.1.0.exe	83
PID 4816 wrote to memory of 4872	4816	SteamGameAdder V9.1.0.exe	83
PID 4816 wrote to memory of 1468	4816	SteamGameAdder V9.1.0.exe	86
PID 4816 wrote to memory of 1468	4816	SteamGameAdder V9.1.0.exe	86
PID 4816 wrote to memory of 1468	4816	SteamGameAdder V9.1.0.exe	86
PID 4872 wrote to memory of 4448	4872	cmd.exe	87
PID 4872 wrote to memory of 4448	4872	cmd.exe	87
PID 4872 wrote to memory of 4448	4872	cmd.exe	87
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1468 wrote to memory of 2204	1468	Sys32.exe	88
PID 1064 wrote to memory of 3360	1064	cmd.exe	89
PID 1064 wrote to memory of 3360	1064	cmd.exe	89
PID 1064 wrote to memory of 3360	1064	cmd.exe	89

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4448	attrib.exe
3360	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SteamGameAdder V9.1.0.exe
"C:\Users\Admin\AppData\Local\Temp\SteamGameAdder V9.1.0.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4816
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\SteamGameAdder V9.1.0.exe" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1064
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\SteamGameAdder V9.1.0.exe" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:3360
- 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:4872
- - 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:4448
- C:\Windows\SysWOW64\Sys32.exe
  "C:\Windows\system32\Sys32.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1468
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2204

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\SysWOW64\Sys32.exe

Filesize
756KB

MD5
0f472613d60ab2e381d7ce1efec9f0a0

SHA1
ee965531a2352e0c32385069cfd5135a0401044c

SHA256
55b4d7060a2a189fbf0311c52772c5fff93ebe80ddf02ed9f29e24ae89259585

SHA512
621f0226378aca81706ed2168124a557b4a081066f39bfa8d8d151aa3e03421c9a8943d7f7b48d20aa7736f67ea552cbf53d307dc496c1a5d180c0f4f4d39152

Download Submit
memory/1468-23-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-22-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-29-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-28-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-16-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-17-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-18-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-19-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-13-0x0000000002260000-0x0000000002261000-memory.dmp

Filesize
4KB

Download
memory/1468-20-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-21-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-27-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-24-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-25-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1468-26-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/2204-14-0x0000000000680000-0x0000000000681000-memory.dmp

Filesize
4KB

Download
memory/4816-0-0x0000000000610000-0x0000000000611000-memory.dmp

Filesize
4KB

Download
memory/4816-15-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads