Analysis
- user interaction
yes - max time kernel
86s - max time network
84s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
10/08/2026, 15:37
General
- Target start.exe
- Size 525KB
- Sample260810-s2vdmscl41
- SHA256 74cd8a8cd637a5ef53f5e113ad00f618e728cf3bee243667080aabf93892135c
Malware Config
Signatures
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
- Adds policy Run key to start application 2 TTPs 3 IoCs
- Disables RegEdit via registry modification 1 IoCs
- Disables Task Manager via registry modification
- 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.
- Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 6 IoCs
- Loads dropped DLL 17 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 1 TTPs 9 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Start PowerShell.
- Drops autorun.inf file 1 TTPs 2 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.
- Drops file in System32 directory 6 IoCs
- Drops file in Program Files directory 6 IoCs
- Drops file in Windows directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 4 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Modifies registry class 1 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 13 IoCs
- Suspicious use of AdjustPrivilegeToken 7 IoCs
- Suspicious use of FindShellTrayWindow 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- System policy modification 1 TTPs 2 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
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C:\Users\Admin\AppData\Local\Temp\start.exe"C:\Users\Admin\AppData\Local\Temp\start.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\bnd_acf0c131\start.exe"C:\Users\Admin\AppData\Local\Temp\bnd_acf0c131\start.exe"2⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\CMD.exe"CMD" netsh advfirewall firewall add rule name="AJN*x:cuxNYixk" dir=in action=allow program="C:\Windows\System32\wdDefender.exe" enable=yes & exit3⤵
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C:\Windows\SYSTEM32\cmd.exe"cmd" /c schtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\WAppCrashNvTew" /tr "C:\Windows\System32\wdDefender.exe" /RL HIGHEST & exit3⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeschtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\WAppCrashNvTew" /tr "C:\Windows\System32\wdDefender.exe" /RL HIGHEST4⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\SYSTEM32\cmd.exe"cmd" /c schtasks /create /f /sc minute /mo 30 /tn "Microsoft\MachineCore" /tr "C:\Program Files\Web\dwdMalwareDef.exe" /RL HIGHEST & exit3⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeschtasks /create /f /sc minute /mo 30 /tn "Microsoft\MachineCore" /tr "C:\Program Files\Web\dwdMalwareDef.exe" /RL HIGHEST4⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\System32\wdDefender.exe"C:\Windows\System32\wdDefender.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\bnd_acf0c131\start.bat" "2⤵
- Executes a command shell one-liner
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C:\Windows\System32\wdDefender.exeC:\Windows\System32\wdDefender.exe1⤵
- Modifies visibility of file extensions in Explorer
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- Drops autorun.inf file
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c start /b powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\tmp4F3F.tmp.exe"' & exit2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\tmp4F3F.tmp.exe"'3⤵
- Loads dropped DLL
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\tmp4F3F.tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp4F3F.tmp.exe"4⤵
- Adds policy Run key to start application
- Disables RegEdit via registry modification
- Executes dropped EXE
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- System policy modification
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C:\Windows\System32\wdDefender.exeC:\Windows\System32\wdDefender.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\wdDefender.exeC:\Windows\System32\wdDefender.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
2PowerShell
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Event Triggered Execution
1AppInit DLLs
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Event Triggered Execution
1AppInit DLLs
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Hide Artifacts
1Hidden Files and Directories
1Modify Registry
5Replay Monitor
Loading Replay Monitor...
Downloads
start.exe.log
wdDefender.exe.log
__PSScriptPolicyTest_sl132eml.vud.ps1
start.bat
start.exe
tmp4F3F.tmp.exe
xdwd.dll
memory/432-134-0x0000021C9B3B0000-0x0000021C9B6BA000-memory.dmp
memory/432-140-0x0000021C81970000-0x0000021C8197C000-memory.dmp
memory/3240-0-0x0000000000820000-0x00000000008AA000-memory.dmp
memory/3512-18-0x00000207B4570000-0x00000207B4580000-memory.dmp
memory/3512-13-0x00000207995E0000-0x0000020799668000-memory.dmp
memory/11040-144-0x0000015772310000-0x0000015772332000-memory.dmp
memory/11172-156-0x0000000000890000-0x000000000089E000-memory.dmp
memory/11172-157-0x0000000005790000-0x0000000005D34000-memory.dmp
memory/11172-158-0x0000000005280000-0x0000000005312000-memory.dmp
memory/11172-159-0x0000000005340000-0x000000000534A000-memory.dmp