Analysis
- user interaction
yes - max time kernel
630s - max time network
625s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
15/10/2026, 17:14
General
- Target obfus.exe
- Size 520KB
- Sample261015-vsac8aaz2q
- SHA256 41099e0093e9ba94e90a5ea9ece569b420b07fab916ef162efc1a5bb282ff006
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.
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 5 IoCs
- Loads dropped DLL 12 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Drops file in Windows directory 18 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 behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of AdjustPrivilegeToken 6 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
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C:\Users\Admin\AppData\Local\Temp\obfus.exe"C:\Users\Admin\AppData\Local\Temp\obfus.exe"1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Drops file in Windows directory
- 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\CMD.exe"CMD" /c SchTaSKs /create /f /sc minute /mo -1 /tn "WatchDog.exe" /tr "C:\Windows\Sub\Client.exe" /RL HIGHEST & exit2⤵
- 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 "WatchDog.exe" /tr "C:\Windows\Sub\Client.exe" /RL HIGHEST3⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\SYSTEM32\CMD.exe"CMD" /c SchTaSKs /create /f /sc minute /mo 5 /tn "WatchDog.exe" /tr "C:\Windows\Sub\WatchDog.exe" /RL HIGHEST & exit2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeSchTaSKs /create /f /sc minute /mo 5 /tn "WatchDog.exe" /tr "C:\Windows\Sub\WatchDog.exe" /RL HIGHEST3⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\Sub\WatchDog.exeC:\Windows\Sub\WatchDog.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Windows directory
- 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\Sub\Client.exe"C:\Windows\Sub\Client.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\wbem\WmiApSrv.exeC:\Windows\system32\wbem\WmiApSrv.exe1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
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C:\Windows\Sub\WatchDog.exeC:\Windows\Sub\WatchDog.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Sub\Client.exe"C:\Windows\Sub\Client.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\Sub\WatchDog.exeC:\Windows\Sub\WatchDog.exe1⤵
- 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
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Event Triggered Execution
1AppInit DLLs
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Event Triggered Execution
1AppInit DLLs
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
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Downloads
WatchDog.exe.log
xdwd.dll
memory/5332-0-0x0000000000FA0000-0x0000000001028000-memory.dmp
memory/5332-33-0x00000000030D0000-0x00000000030E0000-memory.dmp
memory/5332-87-0x00000000030D0000-0x00000000030E0000-memory.dmp
memory/5332-118-0x00000000032B0000-0x00000000032CE000-memory.dmp
memory/5332-117-0x000000001CA80000-0x000000001CBB4000-memory.dmp
memory/5332-116-0x000000001C540000-0x000000001C5B6000-memory.dmp