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Analysis

  • max time kernel
    140s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/03/2024, 17:48

General

  • Target

    2024-03-05_f23664ba2ac4877acfe2864827d7dd51_cryptolocker.exe

  • Size

    47KB

  • MD5

    f23664ba2ac4877acfe2864827d7dd51

  • SHA1

    f8f3bf5e10141e4a73f8314871435c4079ab8b12

  • SHA256

    8417545a231a67fcb45d72a9a954542d771141600858596f7993cbe2005c618a

  • SHA512

    a8b1ef6fef5646f1259d15e53b94746216af83d642cb64ff01db71c91b89cd246c546b8298e571250bbb35c48fd44a07060ec5986e4af9977581aa57a5c05e81

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjIm8z2iaSIO/WZrEu/d+qmsUHQ1wsU:ZzFbxmLPWQMOtEvwDpj386Sj/WprqQ1m

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\2024-03-05_f23664ba2ac4877acfe2864827d7dd51_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-05_f23664ba2ac4877acfe2864827d7dd51_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3860
    • 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:4400

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    47KB

    MD5

    ad0a3f293a8e8e8314586398cc9f3b4c

    SHA1

    528d5dfe0be8658bcb99687be7c7b63e38212aa5

    SHA256

    64881d178b3b15a5f19e7fb8799b0129403c1a36eebfdecb1a5906908a8df715

    SHA512

    921c242bb0a0ebc0ab3b96909df416f6ed05f3aba211ff2d2284331fd5687a515988a865373a37bd1a1ed2a138d76460b243b59b4b9d99a807e9c262c81f4734

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3860-0-0x0000000000450000-0x0000000000453000-memory.dmp

    Filesize

    12KB

  • memory/3860-1-0x0000000002300000-0x0000000002306000-memory.dmp

    Filesize

    24KB

  • memory/3860-2-0x0000000002300000-0x0000000002306000-memory.dmp

    Filesize

    24KB

  • memory/3860-3-0x00000000021A0000-0x00000000021A6000-memory.dmp

    Filesize

    24KB

  • memory/3860-17-0x0000000000450000-0x0000000000453000-memory.dmp

    Filesize

    12KB

  • memory/4400-19-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/4400-20-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB