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Analysis

  • max time kernel
    142s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/02/2024, 15:39

General

  • Target

    2024-02-04_ef8dcedf8c1c3c8a8bcbf006bf9d49d6_cryptolocker.exe

  • Size

    56KB

  • MD5

    ef8dcedf8c1c3c8a8bcbf006bf9d49d6

  • SHA1

    1aaaca642343a965c4d8625455ec1885c0c15818

  • SHA256

    5aa0e1a665bd7fc0313363fe0879de6be733b88b41432a95673cbd0f9f79e550

  • SHA512

    66202676cfac7d1e4f8ad57077d7bb0563921f25b63accfb1870dcca4ca1add0656a1c973f94868affb033aaf77a865a3872c3c1266adb0f66e9ed2834996a28

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7Goi20Pb3:xj+VGMOtEvwDpjubEgV20D3

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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-04_ef8dcedf8c1c3c8a8bcbf006bf9d49d6_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-04_ef8dcedf8c1c3c8a8bcbf006bf9d49d6_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4196
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      PID:2024

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    56KB

    MD5

    9331fd5a7be042fe4e7b8e2954909d74

    SHA1

    ebd9a37b8dd410979c715828f486dd83bc40b687

    SHA256

    710b606d9c6629e07998fedf2218c59dd6dcf72a94bb04f6201d56189ba16d18

    SHA512

    a484cd06f82dad5cd544e90a419af5daec11760838631388f3da33b49e6e781d598a155301076ac96e16dd0915813a37392a235d51c8e0d3cb5e77577480f4d9

  • memory/2024-19-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/2024-25-0x00000000007B0000-0x00000000007B6000-memory.dmp

    Filesize

    24KB

  • memory/2024-54-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4196-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4196-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

    Filesize

    24KB

  • memory/4196-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

    Filesize

    24KB

  • memory/4196-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4196-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB