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Analysis

  • max time kernel
    140s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2024, 15:36

General

  • Target

    2024-01-26_cf6f8555413fdb196933fb6376d7c284_cryptolocker.exe

  • Size

    45KB

  • MD5

    cf6f8555413fdb196933fb6376d7c284

  • SHA1

    aa1e51085c3243f88da6c927fc1675b15ca4b18f

  • SHA256

    30233b3f67cb9cfe494e5b6cac57bc9bc2da978eced334fb728ac211bb921006

  • SHA512

    8fc2a096a3b1a60baa36b1bae34c75194f89e16123535533b72d1d7a1c0bd17673d8389d75a09e77f28f4c55de37a7d3c01325ece75ea9d467c6f323d03b3ad8

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjIm8z2iaSIO/WZrEu/d+qmsUHQ1wsn:ZzFbxmLPWQMOtEvwDpj386Sj/WprqQ1J

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-01-26_cf6f8555413fdb196933fb6376d7c284_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-26_cf6f8555413fdb196933fb6376d7c284_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3876
    • 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:2716

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    45KB

    MD5

    29a5424946982effe4d9f0b55e3b2e0d

    SHA1

    89e0e62419d646e975317396af87002e1c4c8ee1

    SHA256

    66ee2f34c8684758f999ed8759326308c3b8639557b0bfd3e2d900dd0aa2dd3e

    SHA512

    0834a09fc577902035e6a2c4704e34762892984a25aa0d9ce8c036c94a0cd699a276c07a1281775a57f1aefd8c2ffc0568a36eb60631a16362ec4dad7d1c64ff

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2716-17-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/2716-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/2716-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3876-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/3876-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

    Filesize

    24KB

  • memory/3876-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

    Filesize

    24KB

  • memory/3876-3-0x0000000000810000-0x0000000000816000-memory.dmp

    Filesize

    24KB

  • memory/3876-18-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB