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Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/05/2024, 15:33

General

  • Target

    2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe

  • Size

    33KB

  • MD5

    3c88f406b1be6fb307748c01057ad6a1

  • SHA1

    63c5207a2186771ed516e6789712cf75e915814d

  • SHA256

    160a48216060c0c84241ef6376f8b735b9742dc1a54020749533a0f6f2247506

  • SHA512

    daabe2e1ee2ef6bdbb72b78365311140777dc3609fcce30613e24e3af2c42b805462360c70b1d739f2d585655c8b060c765168dca656c29c5ee754eae9c48f24

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcs828:b/yC4GyNM01GuQMNXw2PSjSKkc9X

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\2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2948
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:3972

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    34KB

    MD5

    fdc8cd75175c26adb5ffbb8ae478761e

    SHA1

    9d800feed23d052ab7529689395e876ddc7d393f

    SHA256

    17208e1155e3d82328f1077b72b7622b072f2dc11338c969b7598ff0ea132765

    SHA512

    9430c2175cb80bff25e60e9eaa53a3a9623c5b6dd2cdd1eb66d3fa4ad8df73683d15eeafd5e1d56076251c96ec8b834f61fcce6cf1ccecefa5f84aac29dfbb2f

  • memory/2948-0-0x0000000002200000-0x0000000002206000-memory.dmp

    Filesize

    24KB

  • memory/2948-1-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/2948-8-0x0000000002200000-0x0000000002206000-memory.dmp

    Filesize

    24KB

  • memory/3972-25-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB