Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-02-2024 17:49

General

  • Target

    2024-02-12_c26ac7ed16a16a37da5b95ae01413d43_cryptolocker.exe

  • Size

    30KB

  • MD5

    c26ac7ed16a16a37da5b95ae01413d43

  • SHA1

    c752559f896eccfeba95f09a1cdac14cdb70360f

  • SHA256

    f476d333754a58c4a70a0b521d8c0e64a3a61f444aae5598a871a38c51f44ffb

  • SHA512

    8e135f9cc72b7a81ba71671dc77a5df3b1706aead09d1662534fda17ae3dbb4636d8f38047d91c11fbca9fac0dc265ad619412bb34ebeb73257564ae43db2e22

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn8YS:b/yC4GyNM01GuQMNXw2PSjW

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\2024-02-12_c26ac7ed16a16a37da5b95ae01413d43_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-12_c26ac7ed16a16a37da5b95ae01413d43_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:232
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:3456

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    31KB

    MD5

    db2a5e08bad3c44745644ce23758c4a2

    SHA1

    ca8b08607595f09ac2d7c9aa693cecda09c2d5f2

    SHA256

    a976a97b2e9af1ee322697e1fe71f8f926d17dc2be073493bb43e799a6926518

    SHA512

    e8dce39a76a71bfc1cc2474995ac3712e3d9935edf61c64a1f8ba9c4662a8c9dae1519033f229a3245f3cbfa59a379f150dbdc6f62c98a4465467927ad83b66b

  • memory/232-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

    Filesize

    24KB

  • memory/232-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

    Filesize

    24KB

  • memory/232-2-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/3456-21-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

    Filesize

    24KB