Analysis
- max time kernel
150s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
13/07/2026, 20:52
General
- Target Client.exe
- Size 684KB
- Sample260713-znw4msgv2l
- SHA256 43d353cf8f0997057113b0d1146728b3cd2e0ba7affa6db4acbd90397ad6c93f
Malware Config
Extracted
-
sheetrat
-
2.6.4
-
Sheet_wvnkneyyxn
-
k32tgg-45688.portmap.host:45688
Signatures
- Family: Sheetrat, NonEuclid rat
Sheetrat aka NonEuclid RAT is a trojan written in C#.
- Detects Sheetrat obfuscated V1.8 and higher 1 IoCs
Sheetrat aka NonEuclid RAT is a trojan written in C#.
- 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 2 IoCs
- Loads dropped DLL 7 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Drops file in Windows directory 5 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 64 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 4 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\Client.exe"C:\Users\Admin\AppData\Local\Temp\Client.exe"1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\CMD.exe"CMD" /C SchTaSKs /CrEAte /F /sc OnLoGoN /rl HighEst /tn "RuntimeBroker.exe" /tr "C:\Windows\Sub\RuntimeBroker.exe" & exit2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\schtasks.exeSchTaSKs /CrEAte /F /sc OnLoGoN /rl HighEst /tn "RuntimeBroker.exe" /tr "C:\Windows\Sub\RuntimeBroker.exe"3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Windows\SYSTEM32\CMD.exe"CMD" /c SchTaSKs /create /f /sc minute /mo -1 /tn "RuntimeBroker.exe" /tr "C:\Windows\Sub\RuntimeBroker.exe" /RL HIGHEST & exit2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\schtasks.exeSchTaSKs /create /f /sc minute /mo -1 /tn "RuntimeBroker.exe" /tr "C:\Windows\Sub\RuntimeBroker.exe" /RL HIGHEST3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Windows\Sub\RuntimeBroker.exeC:\Windows\Sub\RuntimeBroker.exe1⤵
- Executes dropped EXE
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\Sub\xdwdRuntimeBroker.exeC:\Users\Admin\AppData\Roaming\Sub\xdwdRuntimeBroker.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\system32\wbem\WmiApSrv.exeC:\Windows\system32\wbem\WmiApSrv.exe1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Enterprise v16
Persistence
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
Loading Replay Monitor...
Downloads
xdwd.dll
memory/1456-211-0x00007FFCB6E60000-0x00007FFCB6E82000-memory.dmp
memory/1456-207-0x00007FFCB6E60000-0x00007FFCB6E82000-memory.dmp
memory/2128-209-0x00007FFCB6E60000-0x00007FFCB6E82000-memory.dmp
memory/2128-212-0x00007FFCB6E60000-0x00007FFCB6E82000-memory.dmp
memory/2128-213-0x00007FFCB6E60000-0x00007FFCB6E82000-memory.dmp
memory/3644-4-0x00007FFCAAC20000-0x00007FFCAB5C4000-memory.dmp
memory/3644-5-0x00007FFCAAC20000-0x00007FFCAB5C4000-memory.dmp
memory/3644-6-0x00007FFCAAC20000-0x00007FFCAB5C4000-memory.dmp
memory/3644-42-0x00007FFCAAC20000-0x00007FFCAB5C4000-memory.dmp
memory/3644-3-0x00007FFCAAC20000-0x00007FFCAB5C4000-memory.dmp
memory/3644-119-0x00007FFCAAC20000-0x00007FFCAB5C4000-memory.dmp
memory/3644-148-0x00007FFCAAC20000-0x00007FFCAB5C4000-memory.dmp
memory/3644-2-0x00007FFCAAC20000-0x00007FFCAB5C4000-memory.dmp
memory/3644-0-0x00007FFCAADAF000-0x00007FFCAADB0000-memory.dmp
memory/3644-1-0x00000000001D0000-0x0000000000282000-memory.dmp