Resubmissions

03/06/2026, 14:45

260603-r4xfcahx9z

03/06/2026, 12:17

260603-pgalysfy7m8

Analysis

  • max time kernel
    149s
  • max time network
    158s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    03/06/2026, 12:17

General

  • Target
    avcodec-57.dll
  • Size 10.0MB
  • Sample260603-pgalysfy7m
  • SHA256 78f4a5e11238fc4cb5f3db7fd14f696bf7f6f6f8f78b10cb3d52b7a8c9a01c41
  • 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.

  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\avcodec-57.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1276
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\avcodec-57.dll,#1
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2412
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2412 -s 480
        3⤵
        • Program crash
        PID:3264
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2412 -ip 2412
    1⤵
      PID:4376

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          memory/2412-6-0x00000000742D0000-0x0000000074338000-memory.dmp

          memory/2412-5-0x0000000064B40000-0x0000000064B57000-memory.dmp

          memory/2412-4-0x0000000074340000-0x0000000074364000-memory.dmp

          memory/2412-3-0x0000000066200000-0x000000006630A000-memory.dmp

          memory/2412-2-0x000000006EB40000-0x000000006EB65000-memory.dmp

          memory/2412-1-0x0000000063080000-0x000000006309E000-memory.dmp

          memory/2412-0-0x0000000074370000-0x0000000075597000-memory.dmp