Analysis
- max time kernel
150s - max time network
141s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
30/10/2026, 16:07
General
- Target Client31231.exe
- Size 644KB
- Sample261030-tkp82aew4l
- SHA256 7ab599ef1f7ae516b5dbbb6f6bf244b460b6e81c17d22b24ffa92f832362b415
Malware Config
Extracted
-
sheetrat
-
2.6.4
-
Sheet_wvnkneyyxn
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#.
- Detects Sheetrat obfuscated version 1 IoCs
- 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 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Drops file in Windows directory 5 IoCs
- 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 6 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 3 IoCs
- Suspicious use of WriteProcessMemory 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
-
C:\Users\Admin\AppData\Local\Temp\Client31231.exe"C:\Users\Admin\AppData\Local\Temp\Client31231.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
-
C:\Windows\SYSTEM32\CMD.exe"CMD" /C SchTaSKs /CrEAte /F /sc OnLoGoN /rl HighEst /tn "RuntimeBroker.exe" /tr "C:\Windows\Sub\RuntimeBroker.exe" & exit2⤵
- Executes a command shell one-liner
- 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
-
-
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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
- Reads the TCP/IP host and domain name from the registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\Sub\RuntimeBroker.exeC:\Windows\Sub\RuntimeBroker.exe1⤵
- Executes dropped EXE
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious behavior: EnumeratesProcesses
- 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
1Replay Monitor
Loading Replay Monitor...
Downloads
xdwd.dll
memory/436-120-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/436-2-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/436-3-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/436-4-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/436-5-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/436-6-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/436-7-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/436-44-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/436-0-0x00007FFB361EF000-0x00007FFB361F0000-memory.dmp
memory/436-1-0x00000000006A0000-0x0000000000748000-memory.dmp
memory/436-147-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/2804-153-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/2804-152-0x00007FFB422B0000-0x00007FFB422D2000-memory.dmp
memory/2804-154-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/2804-160-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/2804-161-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/2804-170-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/2804-171-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp
memory/2804-174-0x00007FFB422B0000-0x00007FFB422D2000-memory.dmp
memory/2804-175-0x00007FFB36060000-0x00007FFB36A04000-memory.dmp