Analysis

  • max time kernel
    24s
  • max time network
    34s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    05/07/2026, 22:09

General

  • Target
    $PLUGINSDIR/NsisPlugin.dll
  • Size 280KB
  • Sample260705-121vesf12v
  • SHA256 23abc9395b36419700f31b507f13a189ec2eeb70c7e1a1fe9406c2b9e0728298
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\NsisPlugin.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2588
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\NsisPlugin.dll,#1
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1716
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1716 -s 524
        3⤵
        • Program crash
        PID:3404
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1716 -ip 1716
    1⤵
      PID:4828
    • C:\Windows\system32\sihost.exe
      sihost.exe
      1⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:4672
      • C:\Windows\explorer.exe
        explorer.exe /LOADSAVEDWINDOWS
        2⤵
        • Boot or Logon Autostart Execution: Active Setup
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        PID:2864
    • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
      "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
      1⤵
        PID:3328
      • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
        "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
        1⤵
          PID:5060

        Network

              MITRE ATT&CK Enterprise v16

              Replay Monitor

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              Downloads

              prep_Activatable Class_Hermes_perf.cache

              • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
              • Size 599B
              • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
              • MD5 SHA1 SHA512 TLSH

              memory/3328-18-0x000001ACF8ED0000-0x000001ACF8FD0000-memory.dmp

              memory/3328-65-0x000001AC93FC0000-0x000001AC93FE0000-memory.dmp

              memory/3328-47-0x000001AC83B60000-0x000001AC83B80000-memory.dmp

              memory/3328-33-0x000001AC93BC0000-0x000001AC93CC0000-memory.dmp

              memory/3328-32-0x000001AC839E0000-0x000001AC83A00000-memory.dmp