Analysis

  • user interaction
    yes
  • max time kernel
    149s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    05/07/2026, 19:36

General

  • Target
    $PLUGINSDIR/LangDLL.dll
  • Size 8KB
  • Sample260705-ybbfqsaz9m
  • SHA256 2e08e077a0800ec39c0596f4dd91cbbfa917eeef2d75a00767917b8d1f6884ac
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
3/10

Malware Config

Signatures

  • 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
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious use of SetWindowsHookEx 13 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\LangDLL.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5552
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\LangDLL.dll,#1
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5316
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 5316 -s 600
        3⤵
        • Program crash
        PID:5680
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5316 -ip 5316
    1⤵
      PID:2820
    • C:\Windows\system32\OpenWith.exe
      C:\Windows\system32\OpenWith.exe -Embedding
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4816
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\FindInstall.sys
        2⤵
        • Opens file in notepad (likely ransom note)
        PID:2184

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          memory/5316-0-0x0000000074A40000-0x0000000074A4A000-memory.dmp