Analysis

  • max time kernel
    135s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/05/2024, 20:14

General

  • Target

    2024-05-03_ef8a3c9afa9f789a83a66ee7b16a118a_cryptolocker.exe

  • Size

    36KB

  • MD5

    ef8a3c9afa9f789a83a66ee7b16a118a

  • SHA1

    47aadbe8c4c528e59d877d6c017d9d6d64931f74

  • SHA256

    1af9730e9c807169fc0e4e7ed802b33c2d1a2bb3de4482bf1479b1ed4817ec72

  • SHA512

    d5f6c4dd44a69e0cca8c4771fd64dd005b3fe3c3475d5e746e1e483ee88027fbb6a2f4e4bfb858a35d83c203bd2729cd1936c65c65490205236e3dacf1af893d

  • SSDEEP

    768:fTz7y3lhsT+hs1SQtOOtEvwDpjfAu9+46:fT+hsMQMOtEvwDpjoIH6

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\2024-05-03_ef8a3c9afa9f789a83a66ee7b16a118a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-03_ef8a3c9afa9f789a83a66ee7b16a118a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4608
    • 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:5112

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    37KB

    MD5

    5249225ffc514295dcdfe5c22e9354ef

    SHA1

    e60261ebb595ba08b3165775af43618639d2c02a

    SHA256

    5a2487ef79bbb2092269db498b06a3c7f6b25eb6d49d536f4966b87cbb09ca30

    SHA512

    a53051c6c009b069da3e2f3f2945b484dd7b0eea94e78951db9a01ac7e8787e67b1d7f07761c0b90f8cfefe75942f315c98d1b5665a25275ed0061729e4e74a3

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4608-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4608-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/4608-7-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/5112-17-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/5112-23-0x00000000021C0000-0x00000000021C6000-memory.dmp

    Filesize

    24KB