Analysis

  • max time kernel
    150s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/02/2024, 10:38

General

  • Target

    2024-02-23_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe

  • Size

    27KB

  • MD5

    408d13b8d7884403cba28a20db0d0992

  • SHA1

    783bb564696be5048ae73ace63ef2c7a503f8748

  • SHA256

    4cdbb19aaf03032eab2123e81d2e1b33c2992996bb8179dbb87fee0026418edf

  • SHA512

    d60b6a7c5be2754b69e61a74129061eb045b18cdffa3d850e9999f6b33a5394091a53ed39cca5438858c0a135f6748597cb1e15a0fbe7879e685d669c07cc048

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+Un:b/yC4GyNM01GuQMNXum+6

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\2024-02-23_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-23_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1336
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:3872

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          28KB

          MD5

          f5026939b3fb62b116119324eadd796e

          SHA1

          d3c94e774db015f07228e3aec519f663460562c8

          SHA256

          f25b96d60b733d39cb181f68654786477d8bd1248a739d3045694e794260b778

          SHA512

          829a165939e3ec62eb83963728c71fd66aec27dfa2846d679a54201aad99dc2ed7d335efc100546a7baea704e6b0d3b0f4deb3f7c35ee9c076dccd0a2ba41a27

        • memory/1336-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

          Filesize

          24KB

        • memory/1336-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

          Filesize

          24KB

        • memory/1336-2-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/3872-25-0x00000000020E0000-0x00000000020E6000-memory.dmp

          Filesize

          24KB