Analysis
- max time kernel
178s - max time network
180s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
06/08/2026, 15:03
General
- Target 3809c5b99a5da43070b1fa70b77756c72cc3b5cc1996edd080f078a9010d9784.vbs
- Size 1.6MB
- Sample260806-se6hdstfkg
- SHA256 3809c5b99a5da43070b1fa70b77756c72cc3b5cc1996edd080f078a9010d9784
Malware Config
Extracted
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vjw0rm
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http://nuevos.kozow.com:1234
Signatures
- Family: Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
- Badlisted process makes network request 2 IoCs
Network request originating from process or tool commonly abused by malware.
- Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Run Powershell and hide display window.
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 1 TTPs 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Executes a VBScript file via the Windows Script Host. 1 TTPs 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Kills process with taskkill 1 IoCs
- 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 5 IoCs
- Suspicious use of AdjustPrivilegeToken 64 IoCs
- Suspicious use of WriteProcessMemory 9 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:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\3809c5b99a5da43070b1fa70b77756c72cc3b5cc1996edd080f078a9010d9784.vbs"1⤵
- Adds Run key to start application
- Executes a VBScript file via the Windows Script Host.
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\taskkill.exe"C:\Windows\System32\taskkill.exe" /IM cmstp.exe /F2⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\wscript.exe"C:\Windows\System32\wscript.exe" "C:\Users\Admin\AppData\Local\Temp\tfg10662.vbs"2⤵
- Executes a VBScript file via the Windows Script Host.
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -File "C:\Users\Admin\AppData\Local\Temp\ex16156.ps1"3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\kcmvadyh\kcmvadyh.cmdline"4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES8AA2.tmp" "c:\Users\Admin\AppData\Local\Temp\kcmvadyh\CSC948063978E6A414EB6E2B553FBA3CEB.TMP"5⤵
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -WindowStyle Hidden -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\Temp\agent_1784154235.ps1"4⤵
- Badlisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\yawl2rka\yawl2rka.cmdline"5⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES91B7.tmp" "c:\Users\Admin\AppData\Local\Temp\yawl2rka\CSC591845F23FD24E11BA327EFB8E37FA.TMP"6⤵
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /sc onlogon /tn "WindowsUpdate" /tr "wscript.exe //B C:\Users\Admin\AppData\Roaming\Windows\Cache\DllHost.vbs" /f /rl HIGHEST2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\wscript.exewscript.exe1⤵
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
2PowerShell
1Visual Basic
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
RES8AA2.tmp
RES91B7.tmp
__PSScriptPolicyTest_s2gkos4a.y4d.ps1
agent_1784154235.ps1
ex16156.ps1
kcmvadyh.dll
tfg10662.vbs
yawl2rka.dll
CSC948063978E6A414EB6E2B553FBA3CEB.TMP
kcmvadyh.0.cs
kcmvadyh.cmdline
CSC591845F23FD24E11BA327EFB8E37FA.TMP
yawl2rka.0.cs
yawl2rka.cmdline
memory/2464-36-0x0000018656670000-0x0000018656678000-memory.dmp
memory/2464-39-0x0000018656730000-0x000001865674E000-memory.dmp
memory/2464-40-0x0000018656750000-0x0000018656802000-memory.dmp
memory/2464-41-0x0000018656720000-0x000001865672A000-memory.dmp
memory/2464-43-0x0000018656840000-0x000001865686A000-memory.dmp
memory/2464-44-0x0000018656840000-0x0000018656864000-memory.dmp
memory/6032-19-0x0000022126190000-0x0000022126198000-memory.dmp
memory/6032-3-0x0000022126120000-0x0000022126142000-memory.dmp