Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    26/04/2026, 16:41

General

  • Target
    2026-04-26_f18bd3d0a75b7a094a9335b6f81265d0_cryptolocker_elex.exe
  • Size 46KB
  • Sample260426-t7kbasbw91
  • SHA256 b28c2a48b4549862857381a0b75cbf43f79e5173d7694ce3832200afa76cdcd4
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10

Malware Config

Signatures

  • Custom signature
    Detection of CryptoLocker Variants 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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 use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-04-26_f18bd3d0a75b7a094a9335b6f81265d0_cryptolocker_elex.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-04-26_f18bd3d0a75b7a094a9335b6f81265d0_cryptolocker_elex.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4124
    • C:\Users\Admin\AppData\Local\Temp\hasfj.exe
      "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:4944

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        hasfj.exe

        • Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
        • Size 46KB
        • SHA256 9ae681d25dcffca8273c9c72b6d62d49c2a87ea7ebf82654d26a5c0120dece8b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/4124-0-0x0000000008004000-0x0000000008005000-memory.dmp

        memory/4124-1-0x0000000002720000-0x0000000002726000-memory.dmp

        memory/4124-2-0x0000000008000000-0x000000000800A000-memory.dmp

        memory/4124-3-0x0000000002F50000-0x0000000002F56000-memory.dmp

        memory/4124-17-0x0000000002160000-0x000000000223A000-memory.dmp

        memory/4944-18-0x0000000008000000-0x000000000800A000-memory.dmp

        memory/4944-26-0x0000000008000000-0x000000000800A000-memory.dmp

        memory/4944-27-0x0000000002120000-0x00000000021FA000-memory.dmp