Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/05/2024, 22:25

General

  • Target

    2024-05-31_1d2087291728af8bc7c882bd394c74f1_cryptolocker.exe

  • Size

    58KB

  • MD5

    1d2087291728af8bc7c882bd394c74f1

  • SHA1

    68addb81d0e07693da841e657e956ea504588ff2

  • SHA256

    3d4b4acfa93194df86e5322601488ffa1559b7c41629c130833260088ede6794

  • SHA512

    35158cfa4ceaa5fae23c6fa043f8b37acf36e2bb3203dd464dee1a2a5eff6d365d79cc419a5c436b487368bb79f7cc9c8e5b4fefbaa929d1155cfbe267b71c58

  • SSDEEP

    1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6Impy/:BbdDmjr+OtEvwDpjMU

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-31_1d2087291728af8bc7c882bd394c74f1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_1d2087291728af8bc7c882bd394c74f1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2680
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2696

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\asih.exe

          Filesize

          58KB

          MD5

          be76d5a325a41ea58caa03102971e7e1

          SHA1

          0f9234a782a5d505e585d5b4bf07830dda683b24

          SHA256

          3126cfbac652dbc87c0d1627baf407dd8a10c5975190f2cf7cc7da5cbee2733b

          SHA512

          4b6f1357f9b64296ccf8bbc7f0dcc912813c59f03991d74f46618e245d6186819e727e384da64de426017ba0d4145a112b5b4b89c1b0c6b1070b1e3287808450

        • memory/2680-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2680-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/2680-2-0x0000000002070000-0x0000000002076000-memory.dmp

          Filesize

          24KB

        • memory/2680-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/2680-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2696-20-0x0000000000590000-0x0000000000596000-memory.dmp

          Filesize

          24KB

        • memory/2696-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

          Filesize

          24KB

        • memory/2696-27-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB