Analysis
- user interaction
yes - max time kernel
120s - max time network
119s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
17/10/2026, 22:02
General
- Target fxtun.exe
- Size 541KB
- Sample261017-1yattszzft
- SHA256 6126ea73d08e4edf6065beb4f47df3ebaefe91b77fd51f4b1a4b3ce508863e1c
Malware Config
Signatures
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
- Executes dropped EXE 5 IoCs
- Loads dropped DLL 7 IoCs
- Looks up external IP address via web service 1 TTPs 6 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Drops file in System32 directory 6 IoCs
- Drops file in Windows directory 8 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 2 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- Reads the TCP/IP host and domain name from the registry 1 TTPs 12 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 7 IoCs
- Suspicious use of WriteProcessMemory 6 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\fxtun.exe"C:\Users\Admin\AppData\Local\Temp\fxtun.exe"1⤵
- Modifies WinLogon for persistence
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\CMD.exe"CMD" netsh advfirewall firewall add rule name=""F`e'C-x'`Qb'o" dir=in action=allow program="C:\Windows\System32\xdwdDefender.exe" enable=yes & exit2⤵
-
-
C:\Windows\SYSTEM32\cmd.exe"cmd" /c schtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\WAppCrashNvTew" /tr "C:\Windows\System32\xdwdDefender.exe" /RL HIGHEST & exit2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\schtasks.exeschtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\WAppCrashNvTew" /tr "C:\Windows\System32\xdwdDefender.exe" /RL HIGHEST3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Windows\SYSTEM32\cmd.exe"cmd" /c schtasks /create /f /sc minute /mo 30 /tn "Microsoft\MachineCore" /tr "C:\Windows\Web\xdwdMalwareDef.exe" /RL HIGHEST & exit2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\schtasks.exeschtasks /create /f /sc minute /mo 30 /tn "Microsoft\MachineCore" /tr "C:\Windows\Web\xdwdMalwareDef.exe" /RL HIGHEST3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Windows\System32\xdwdDefender.exe"C:\Windows\System32\xdwdDefender.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\System32\xdwdDefender.exeC:\Windows\System32\xdwdDefender.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\Web\xdwdMalwareDef.exeC:\Windows\Web\xdwdMalwareDef.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\System32\xdwdDefender.exe"C:\Windows\System32\xdwdDefender.exe"1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\System32\xdwdDefender.exe"C:\Windows\System32\xdwdDefender.exe"1⤵
- Executes dropped EXE
- Loads dropped DLL
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Winlogon Helper DLL
1Event Triggered Execution
1AppInit DLLs
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Winlogon Helper DLL
1Event Triggered Execution
1AppInit DLLs
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
xdwdDefender.exe
xdwd.dll
memory/1876-120-0x000001EE74700000-0x000001EE7470A000-memory.dmp
memory/5956-3-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/5956-4-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/5956-5-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/5956-6-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/5956-7-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/5956-8-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/5956-0-0x00007FFDCD7AF000-0x00007FFDCD7B0000-memory.dmp
memory/5956-2-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/5956-108-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/5956-1-0x000002BE89D30000-0x000002BE89DBE000-memory.dmp