Analysis

  • max time kernel
    150s
  • max time network
    157s
  • platform
    windows11-21h2_x64
  • resource
    win11-20251015-en
  • resource tags

    arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    23/11/2025, 10:16

General

  • Target
    svchost.exe
  • Size 204KB
  • Sample251123-maxf2ayqan
  • SHA256 b35935b1f0fc9cc104bd32a4e8410a6fe04e1b5b4ca714c918df55353435ef1a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • simda

Attributes
  • dga

    gatyfus.com

    lyvyxor.com

    vojyqem.com

    qetyfuv.com

    puvyxil.com

    gahyqah.com

    lyryfyd.com

    vocyzit.com

    qegyqaq.com

    purydyv.com

    gacyzuz.com

    lygymoj.com

    vowydef.com

    qexylup.com

    pufymoq.com

    gaqydeb.com

    lyxylux.com

    vofymik.com

    qeqysag.com

    puzylyp.com

    gadyniw.com

    lymysan.com

    volykyc.com

    qedynul.com

    pumypog.com

    galykes.com

    lysynur.com

    vonypom.com

    qekykev.com

    pupybul.com

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Simda family
  • simda

    Simda is an infostealer written in C++.

  • Executes dropped EXE 1 IoCs
  • Modifies WinLogon 2 TTPs 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 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: RenamesItself 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
    1⤵
    • Modifies WinLogon
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: RenamesItself
    • Suspicious use of WriteProcessMemory
    PID:2900
    • C:\Windows\apppatch\svchost.exe
      "C:\Windows\apppatch\svchost.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Executes dropped EXE
      • Modifies WinLogon
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:4304

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        8D6F.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\8D6F.tmp
        • Size 3KB
        • SHA256 154288b6432ebc64aa5cd49399604efddbd550bde5256f1777d4835e446095c8
        • MD5 SHA1 SHA512

        svchost.exe

        • Path C:\Windows\apppatch\svchost.exe
        • Size 204KB
        • SHA256 52aec4c712864fa8b4beae0d1ed1c0f8581ed3d5851beab01f85021dc59af8a3
        • MD5 SHA1 SHA512 SSDEEP

        memory/2900-0-0x0000000000400000-0x000000000057D000-memory.dmp

        memory/2900-1-0x00000000026E0000-0x0000000002731000-memory.dmp

        memory/2900-13-0x00000000026E0000-0x0000000002731000-memory.dmp

        memory/2900-11-0x0000000000400000-0x000000000057D000-memory.dmp

        memory/4304-12-0x0000000000400000-0x000000000057D000-memory.dmp

        memory/4304-14-0x00000000025A0000-0x00000000025F1000-memory.dmp

        memory/4304-15-0x0000000002B70000-0x0000000002C18000-memory.dmp

        memory/4304-20-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-18-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-16-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-44-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-42-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-41-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-36-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-21-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-69-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-77-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-76-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-75-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-74-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-73-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-72-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-71-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-70-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-68-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-67-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-66-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-65-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-64-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-63-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-62-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-60-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-59-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-58-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-57-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-55-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-54-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-53-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-52-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-51-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-50-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-49-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-61-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-56-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-24-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-48-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-47-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-46-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-45-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-43-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-40-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-39-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-38-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-37-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-35-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-34-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-33-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-32-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-31-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-30-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-29-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-28-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-27-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-26-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-25-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-23-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-22-0x0000000002D60000-0x0000000002E16000-memory.dmp

        memory/4304-162-0x0000000002D60000-0x0000000002E16000-memory.dmp