Analysis

  • max time kernel
    135s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/01/2024, 11:31

General

  • Target

    2024-01-25_a6a2d62419799b40130616ff394bef27_cryptolocker.exe

  • Size

    38KB

  • MD5

    a6a2d62419799b40130616ff394bef27

  • SHA1

    7a8e5a8ed11574622868d04b026013f50d453699

  • SHA256

    6b6e7a8974ec99f6ef37f1b33715764f473aa332bef160e2fa2cfe30561e031c

  • SHA512

    c66b8372a58cb7a72ded68e57f3c49654e42ebf9302aa5522df00793e9d3cb2c1cbc3f1d3ddc2c51abd4223b1f2987c38fb8a07dc7b7b4ed584d51a9e31ca302

  • SSDEEP

    768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvhx5/xFRj:m5nkFNMOtEvwDpjG8hhXx

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-25_a6a2d62419799b40130616ff394bef27_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-25_a6a2d62419799b40130616ff394bef27_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2012
    • 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:756

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    39KB

    MD5

    dd0fefd3440da970d5ff6aaf75cbfcac

    SHA1

    d95096f169d103da598e049579a81b743ee19577

    SHA256

    06552004bf89ff885c8d2e314897446184e193c915b03938b73849ca27a1cabf

    SHA512

    daeee1d5033485a41f2ab88b7b1c70cd4efa56417961618f1647e69e8e4204d0390b085d37c96106ae1b95daee570b0769f44dc4969ae19b7ce78741994889e5

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/756-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/756-20-0x0000000000820000-0x0000000000826000-memory.dmp

    Filesize

    24KB

  • memory/756-21-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/756-49-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2012-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2012-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2012-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2012-3-0x0000000000590000-0x0000000000596000-memory.dmp

    Filesize

    24KB

  • memory/2012-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB