Analysis

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

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    31/05/2026, 06:38

General

  • Target
    2026-05-31_9266edfbbb4779160e3091f0fe249ac8_cryptolocker_elex.exe
  • Size 40KB
  • Sample260531-hefa4aa17s
  • SHA256 39e22a7165eb38092fb9c598fcd826bac01961fc373328b19609cb931a683240
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10

Malware Config

Signatures

  • Custom signature
    Detection of CryptoLocker Variants 3 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\2026-05-31_9266edfbbb4779160e3091f0fe249ac8_cryptolocker_elex.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-05-31_9266edfbbb4779160e3091f0fe249ac8_cryptolocker_elex.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4444
    • C:\Users\Admin\AppData\Local\Temp\gewos.exe
      "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:3288

Network

        MITRE ATT&CK Enterprise v16

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        Downloads

        gewos.exe

        • Path C:\Users\Admin\AppData\Local\Temp\gewos.exe
        • Size 40KB
        • SHA256 4cf0b9de13ea98caa0a793a969cde2b3012629b26778e8b5a5454160a88bc175
        • MD5 SHA1 SHA512 SSDEEP TLSH

        gewosik.exe

        • Path C:\Users\Admin\AppData\Local\Temp\gewosik.exe
        • Size 184B
        • SHA256 85b2e79b62325a98ad2c2b994c062ae22451f7a42b32e4106e5c873b10cf53a1
        • MD5 SHA1 SHA512 TLSH

        memory/3288-18-0x0000000000400000-0x0000000000408000-memory.dmp

        memory/3288-27-0x0000000000400000-0x0000000000408000-memory.dmp

        memory/4444-0-0x0000000000404000-0x0000000000405000-memory.dmp

        memory/4444-1-0x0000000002220000-0x0000000002226000-memory.dmp

        memory/4444-2-0x0000000000400000-0x0000000000408000-memory.dmp

        memory/4444-3-0x0000000000400000-0x0000000000406000-memory.dmp