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Analysis

  • max time kernel
    135s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/01/2024, 20:31

General

  • Target

    2024-01-28_7b618fe40e5a5a4970d47d96e97e06c1_cryptolocker.exe

  • Size

    104KB

  • MD5

    7b618fe40e5a5a4970d47d96e97e06c1

  • SHA1

    ab2fd5a4868c6fab70a90eb91ae50317de2a57fb

  • SHA256

    c69b5379d3b9aa80fe171060f03d36bbc7feeb03358e1a3cd4474061fb3c3d86

  • SHA512

    11c2b1687c3515428cd04b130277f3dbbe8489d7c29fdf378131d2454747b9d4547005169977ab366c9d62f6ce66b664794f99cef9997d8e7c9584656c357f9e

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWjy9g:xj+VGMOtEvwDpjubwQEIikug

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 4 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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-28_7b618fe40e5a5a4970d47d96e97e06c1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-28_7b618fe40e5a5a4970d47d96e97e06c1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2696
    • 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:4208

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    104KB

    MD5

    3a4fa04b74ab8966fe859071fa3b78dc

    SHA1

    bb8300f9eed6d9143166cedf8b9818f6b5cab89c

    SHA256

    7cd8b67abfe2543f32ba78bd691e6edc54cbf4b40a5d1f5782b5f8e7e5715bc6

    SHA512

    3b24a0d98839f577422cf07b79cc2b28ee142d7e2b51ad466b0bf76b31469b3c48a45f6a18d529d7fde630d43313a8a0cc31c87d096fd50df6b1191c3aaaae3a

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2696-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2696-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2696-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2696-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2696-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4208-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4208-47-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB