Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
09/08/2026, 01:18
General
- Target 30bdf41db9b2d73bc716aba403d1efe673d5577dd9e25d0228a7a416d65fb584.exe
- Size 335KB
- Sample260809-bn16laxgpf
- SHA256 30bdf41db9b2d73bc716aba403d1efe673d5577dd9e25d0228a7a416d65fb584
Malware Config
Extracted
-
xworm
-
XWorm V5.6
-
31.59.20.176:6754
-
Install_directory
%AppData%
-
install_file
SteamUpdateCheker.exe
-
localhost
127.0.0.1
Signatures
- Family: Xworm
Xworm is a remote access trojan written in C#.
- Detect Xworm Payload 2 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Creates a file in the Startup directory 1 TTPs 2 IoCs
A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.
- Executes dropped EXE 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 1 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Users\Admin\AppData\Local\Temp\30bdf41db9b2d73bc716aba403d1efe673d5577dd9e25d0228a7a416d65fb584.exe"C:\Users\Admin\AppData\Local\Temp\30bdf41db9b2d73bc716aba403d1efe673d5577dd9e25d0228a7a416d65fb584.exe"1⤵
- Checks computer location settings
- Creates a file in the Startup directory
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "SteamUpdateCheker" /tr "C:\Users\Admin\AppData\Roaming\SteamUpdateCheker.exe"2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SteamUpdateCheker.exeC:\Users\Admin\AppData\Roaming\SteamUpdateCheker.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\SteamUpdateCheker.exeC:\Users\Admin\AppData\Roaming\SteamUpdateCheker.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\SteamUpdateCheker.exeC:\Users\Admin\AppData\Roaming\SteamUpdateCheker.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
SteamUpdateCheker.exe.log
SteamUpdateCheker.exe
memory/2640-0-0x0000000000F20000-0x0000000000F7A000-memory.dmp
memory/2640-5-0x000000001BB30000-0x000000001BB40000-memory.dmp
memory/2640-9-0x000000001BB30000-0x000000001BB40000-memory.dmp