Analysis

  • max time kernel
    146s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-01-2024 22:58

General

  • Target

    2024-01-18_7e8789854c43d39c34e4e34ef4ac3bf7_cryptolocker.exe

  • Size

    46KB

  • MD5

    7e8789854c43d39c34e4e34ef4ac3bf7

  • SHA1

    cb604a868d5cc4f8101195249591681965462bd0

  • SHA256

    4a9c02d344e2af4c10f51719a40a44ee9300eb2533e117a2d850326ca46f8565

  • SHA512

    666f77e8093168b250b812a01ab9d4b61d546e06a4c60f4ff1aff533e0432ad569753d7eb2d91b3246be124ac86c059ba4d3149079764d4e67903bb80a5d5da0

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLtldfHWPw:xj+VGMOtEvwDpjk/fHYw

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-18_7e8789854c43d39c34e4e34ef4ac3bf7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-18_7e8789854c43d39c34e4e34ef4ac3bf7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3380
    • 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:3980

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    46KB

    MD5

    07e3b2a414c126e56214dcc0bc89082d

    SHA1

    a8f8c3a5a2a5f412db2264a741312cdb11609b71

    SHA256

    eb10da7ff418aedf8083dfc1b0748e971898c4c84902e3709d15137ab32200c3

    SHA512

    0a71beb625f662fb992efac5ed359402f90ceeb8202071cff5058f62e22e481315b41cd99e5a7682d585d69e09c61810f482c9be46c1cf3f193f768e3a2d3e1d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3380-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3380-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

    Filesize

    24KB

  • memory/3380-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

    Filesize

    24KB

  • memory/3380-3-0x0000000000810000-0x0000000000816000-memory.dmp

    Filesize

    24KB

  • memory/3380-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3980-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3980-20-0x0000000001F70000-0x0000000001F76000-memory.dmp

    Filesize

    24KB

  • memory/3980-26-0x0000000001F50000-0x0000000001F56000-memory.dmp

    Filesize

    24KB

  • memory/3980-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB