Analysis
- max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
31/08/2026, 14:27
General
- Target 3b17e2fccf0a4ad2f023a08cd8485b02914733db0528b4d5e1e5b88c16c54aa2.exe
- Size 63KB
- Sample260831-rssm1stejf
- SHA256 3b17e2fccf0a4ad2f023a08cd8485b02914733db0528b4d5e1e5b88c16c54aa2
Malware Config
Signatures
- Modifies WinLogon for persistence 2 TTPs 2 IoCs
- Modifies visibility of hidden/system files in Explorer 2 TTPs 2 IoCs
- Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
- Executes dropped EXE 4 IoCs
- Adds Run key to start application 2 TTPs 4 IoCs
- Drops file in Windows directory 6 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 8 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 2 IoCs
- Suspicious use of SetWindowsHookEx 12 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\3b17e2fccf0a4ad2f023a08cd8485b02914733db0528b4d5e1e5b88c16c54aa2.exe"C:\Users\Admin\AppData\Local\Temp\3b17e2fccf0a4ad2f023a08cd8485b02914733db0528b4d5e1e5b88c16c54aa2.exe"1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\system\explorer.exec:\windows\system\explorer.exe2⤵
- Modifies WinLogon for persistence
- Modifies visibility of hidden/system files in Explorer
- Boot or Logon Autostart Execution: Active Setup
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\system\spoolsv.exec:\windows\system\spoolsv.exe SE3⤵
- Executes dropped EXE
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\system\svchost.exec:\windows\system\svchost.exe4⤵
- Modifies WinLogon for persistence
- Modifies visibility of hidden/system files in Explorer
- Boot or Logon Autostart Execution: Active Setup
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\system\spoolsv.exec:\windows\system\spoolsv.exe PR5⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
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C:\Windows\SysWOW64\at.exeat 15:29 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe5⤵
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\at.exeat 15:30 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe5⤵
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\at.exeat 15:31 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe5⤵
- System Location Discovery: System Language Discovery
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Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
3Active Setup
1Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Privilege Escalation
Boot or Logon Autostart Execution
3Active Setup
1Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Defense Evasion
Hide Artifacts
1Hidden Files and Directories
1Modify Registry
4Replay Monitor
Loading Replay Monitor...
Downloads
mrsys.exe
explorer.exe
spoolsv.exe
svchost.exe
memory/1768-58-0x0000000000401000-0x000000000042E000-memory.dmp
memory/1768-0-0x0000000000400000-0x0000000000431000-memory.dmp
memory/1768-3-0x0000000000400000-0x0000000000431000-memory.dmp
memory/1768-2-0x0000000074D00000-0x0000000074E5D000-memory.dmp
memory/1768-4-0x0000000000401000-0x000000000042E000-memory.dmp
memory/1768-59-0x0000000000400000-0x0000000000431000-memory.dmp
memory/1768-1-0x00000000001C0000-0x00000000001C4000-memory.dmp
memory/1768-45-0x00000000001C0000-0x00000000001C4000-memory.dmp
memory/1852-62-0x0000000000400000-0x0000000000431000-memory.dmp
memory/1852-37-0x0000000000400000-0x0000000000431000-memory.dmp
memory/1852-38-0x0000000074D00000-0x0000000074E5D000-memory.dmp
memory/1852-42-0x0000000000400000-0x0000000000431000-memory.dmp
memory/2652-61-0x0000000000400000-0x0000000000431000-memory.dmp
memory/2652-75-0x0000000000400000-0x0000000000431000-memory.dmp
memory/2652-13-0x0000000074D00000-0x0000000074E5D000-memory.dmp
memory/2652-15-0x0000000000400000-0x0000000000431000-memory.dmp
memory/3960-46-0x0000000074D00000-0x0000000074E5D000-memory.dmp
memory/3960-52-0x0000000000400000-0x0000000000431000-memory.dmp
memory/4880-56-0x0000000000400000-0x0000000000431000-memory.dmp
memory/4880-30-0x0000000000400000-0x0000000000431000-memory.dmp
memory/4880-26-0x0000000074D00000-0x0000000074E5D000-memory.dmp
memory/4880-24-0x0000000000400000-0x0000000000431000-memory.dmp
memory/4880-25-0x0000000000400000-0x0000000000431000-memory.dmp