Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-05-2024 17:49

General

  • Target

    2024-05-25_37e35257dab081e3df7f2c440a96ecc0_cryptolocker.exe

  • Size

    86KB

  • MD5

    37e35257dab081e3df7f2c440a96ecc0

  • SHA1

    3d4d30dd4c1111e84bda2ff3bb3ce9d29a0f8058

  • SHA256

    fcbc9e1bdb4707599ebb0fdadd360e6bf6f71cc63db333cc0fbfc55b75105e4f

  • SHA512

    39a3258078a9e7fc1ce98b924ca93a331956af1bce65916dd83626603f9ac75713a825de464524a0914bb1432f14ae949b47afca9a6b6df26a2c54283f882be3

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfWafHNBlR:vCjsIOtEvwDpj5H9YvQd2j

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 IoCs
  • Checks computer location settings 2 TTPs 2 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).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-25_37e35257dab081e3df7f2c440a96ecc0_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-25_37e35257dab081e3df7f2c440a96ecc0_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2716
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:4032

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    86KB

    MD5

    466b3612717882654db2dfbe03405bbb

    SHA1

    2c742ec1498cf92e8e2787db17a4af3097e4aee4

    SHA256

    debcd73d35e59b03d3cae20710a4178d7cce3d48dbcd36ccb16b4efe45812027

    SHA512

    1ea1f98899c119fb1d3cfb85216f3afb7895dbf34160d19880dd8163276b3b87760e28908aa23fa3a7a31b669a477e857b06137c016f48eecb135d287da21367

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2716-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2716-1-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2716-8-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4032-23-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4032-17-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB