Analysis

  • max time kernel
    133s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/05/2024, 14:44

General

  • Target

    2024-05-12_bfb074670820b4f533c4b84a86d43109_cryptolocker.exe

  • Size

    72KB

  • MD5

    bfb074670820b4f533c4b84a86d43109

  • SHA1

    bc629d3d7e9f30294c35fab6b842b4e071ca2d8e

  • SHA256

    6b9d5ea8c686e447894f643167f1ca65ed61c2c4af10df7f3cf16f218938cdec

  • SHA512

    420c5069ce187d29b58005e929bae0177b6af73dd02d2498d2a0c3f967a3ed19722143b9dd67b9b839e5897095d71e5df395525cca68f9f066b1afe1c62022cf

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9D:C4Q2c94OtEvwDpj4H8z+

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-05-12_bfb074670820b4f533c4b84a86d43109_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-12_bfb074670820b4f533c4b84a86d43109_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2364
    • 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:3016

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    72KB

    MD5

    dc66b117a8896a9a162df5508470ce11

    SHA1

    3409ef68840bb58ff041ad8a246cfe1f8b8a4815

    SHA256

    0a27651ddb5b04493d8bf77122ae4e852aad499ad765f8896991a13d020a28b8

    SHA512

    9575f3ac03aeba8fc0953c3db858c853bd6ab56542422dab5e9a10b1519eaac9d6622fee9bbbe4b98d70d94c430f2092582cb9c1df8f16a0a34d90299f67841b

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2364-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2364-1-0x0000000000840000-0x0000000000846000-memory.dmp

    Filesize

    24KB

  • memory/2364-8-0x0000000000840000-0x0000000000846000-memory.dmp

    Filesize

    24KB

  • memory/2364-2-0x0000000000860000-0x0000000000866000-memory.dmp

    Filesize

    24KB

  • memory/2364-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3016-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3016-21-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/3016-27-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/3016-51-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB