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Analysis

  • max time kernel
    132s
  • max time network
    134s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/05/2024, 16:50

General

  • Target

    2024-05-27_b40273a2eb01d1079ff857a27c1e339b_cryptolocker.exe

  • Size

    53KB

  • MD5

    b40273a2eb01d1079ff857a27c1e339b

  • SHA1

    fcaa16d747f145a69c4d8dd31834efc023505db5

  • SHA256

    0c1733d73b024ffe307f52268cdd5d1aa19c0ade271afb980bf2e50a15d9f834

  • SHA512

    6ce3a339fc93cb933eb6a7736f3365acffd4a485af250ed8f7055f20b9adfc7318a77f0c05c7eb679465c80585242c206f909703bf3188a1eab22453f9af1e47

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPhqlcnvhx5/xFRkHD:6j+1NMOtEvwDpjr8hhXij

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 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
  • 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\2024-05-27_b40273a2eb01d1079ff857a27c1e339b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_b40273a2eb01d1079ff857a27c1e339b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2672
    • 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:4920

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    54KB

    MD5

    adc53dca92c44ccb9a28d17570a77b37

    SHA1

    19f699c502e5f770c08a884b6fd935cf610a307d

    SHA256

    7250d15dec62f00ab550e68fd36a2110cb653424c1de659078a2acafe82f62a8

    SHA512

    05caea014368d446d589133e4db24c097d0762ff910622c7fe40937c5d8f854fca204884b69655f8db4b5d0af5df810134692212f2e0291361b57156e6542faa

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2672-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2672-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/2672-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/2672-3-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

    Filesize

    24KB

  • memory/2672-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4920-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4920-26-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

    Filesize

    24KB

  • memory/4920-49-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB