Analysis

  • max time kernel
    150s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-06-2024 01:34

General

  • Target

    2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe

  • Size

    34KB

  • MD5

    6991f83afc6547f2597e8c3cea0d0e4e

  • SHA1

    b09c986f25996a429eae00fbd2e2301bb5a24fe0

  • SHA256

    c0ab0c81c984f3d055a49450dfb69795cf355d9c506b057684762edce6cedff5

  • SHA512

    4ed40cb353ed1865dc092c0f46213dda86298fa140c089bfa23f653877ec677af38b033ac1d1f17dc9a5c7d268470cadc927bd5f37cdb32e5605ecb4c9ed0744

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcs82uMuCzb:b/yC4GyNM01GuQMNXw2PSjSKkc9/MV

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 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\2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1632
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:3508

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    35KB

    MD5

    ad386d25d5d3ef8ac1c2ae8b1229147d

    SHA1

    1491e833db77f74e4f042242926a6b94bb36f0e4

    SHA256

    5f580e70c799d7dd57953bd5f2948b300a6eacc0b708ccc30209229fe6657fba

    SHA512

    ceb2665d60a7a4dfce9cf982bd57f9bba272f121313a581aa9b1489455c0da2455a13bb9dbb7f67c747951c4156f6e8fec8424abcb104f14f6629883884b7235

  • memory/1632-0-0x0000000002160000-0x0000000002166000-memory.dmp

    Filesize

    24KB

  • memory/1632-1-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/1632-8-0x0000000002160000-0x0000000002166000-memory.dmp

    Filesize

    24KB

  • memory/3508-25-0x0000000002120000-0x0000000002126000-memory.dmp

    Filesize

    24KB