Analysis
- user interaction
yes - max time kernel
80s - max time network
82s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
02/11/2026, 21:28
General
- Target RuntimeHost.exe
- Size 24KB
- Sample261102-1bdl7sdt5v
- SHA256 f6e64f56886d4d464e7611242bdc846376e8a0d399913e00cf22ef7cba20262f
Malware Config
Signatures
- Creates a file in the Startup directory 1 TTPs 1 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 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 1 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 2 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 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 3 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\RuntimeHost.exe"C:\Users\Admin\AppData\Local\Temp\RuntimeHost.exe"1⤵
- Adds Run key to start application
- Reads the TCP/IP host and domain name from the registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks.exe" /create /tn "RuntimeHost8c37" /tr "\"C:\Users\Admin\AppData\Roaming\.8c376f78\RuntimeHost.exe\"" /sc onlogon /rl highest /f2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\SYSTEM32\cmd.exe"cmd.exe" /c echo Set oWS = WScript.CreateObject("WScript.Shell") > "%temp%\lnk.vbs" & echo Set oLink = oWS.CreateShortcut("C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RuntimeHost.lnk") >> "%temp%\lnk.vbs" & echo oLink.TargetPath = "C:\Users\Admin\AppData\Roaming\.8c376f78\RuntimeHost.exe" >> "%temp%\lnk.vbs" & echo oLink.Save >> "%temp%\lnk.vbs" & cscript //nologo "%temp%\lnk.vbs" & del "%temp%\lnk.vbs"2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cscript.execscript //nologo "C:\Users\Admin\AppData\Local\Temp\lnk.vbs"3⤵
- Creates a file in the Startup directory
- Executes a VBScript file via the Windows Script Host.
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C:\Users\Admin\AppData\Roaming\.8c376f78\RuntimeHost.exe"C:\Users\Admin\AppData\Roaming\.8c376f78\RuntimeHost.exe"1⤵
- Executes dropped EXE
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
2Visual Basic
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
lnk.vbs
RuntimeHost.exe
memory/4988-0-0x0000000000AF0000-0x0000000000AFA000-memory.dmp
memory/4988-1-0x00007FFD7C05F000-0x00007FFD7C060000-memory.dmp
memory/4988-2-0x00007FFD7BED0000-0x00007FFD7C874000-memory.dmp
memory/4988-3-0x00007FFD7BED0000-0x00007FFD7C874000-memory.dmp
memory/4988-10-0x000000001C7C0000-0x000000001C982000-memory.dmp
memory/4988-12-0x000000001CEC0000-0x000000001D3E8000-memory.dmp
memory/4988-13-0x00007FFD7BED0000-0x00007FFD7C874000-memory.dmp