Analysis
- max time kernel
149s - max time network
158s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-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
- 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⤵
- 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.exe"C:\Users\Admin\AppData\Roaming\SteamUpdateCheker.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\SteamUpdateCheker.exe"C:\Users\Admin\AppData\Roaming\SteamUpdateCheker.exe"1⤵
- 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
memory/420-16-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp
memory/420-15-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp
memory/420-14-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp
memory/4804-3-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp
memory/4804-5-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp
memory/4804-6-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp
memory/4804-11-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp
memory/4804-4-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp
memory/4804-0-0x00007FFE500DF000-0x00007FFE500E0000-memory.dmp
memory/4804-2-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp
memory/4804-1-0x0000000000DD0000-0x0000000000E2A000-memory.dmp
memory/4804-17-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp
memory/4804-18-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp
memory/4804-19-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp