Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-05-2024 01:18

General

  • Target

    2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe

  • Size

    38KB

  • MD5

    f4213f0853e31228022156858625c379

  • SHA1

    bdfbdca27526bdec8ab9eea008e8025871d50689

  • SHA256

    3dae8f1360ea93ea89f7f7cbb893efa3294ae849c8a50956fce5bd3cbbd5fbaa

  • SHA512

    a53a2cb9a9a041d44ab552bbfb8f29b9708aad155d0875630d985885277e32194e944a0fedb3a03c2d8ecf0d46bd25ae0a67973fb670eea62ab6dbd878766c92

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYe:qDdFJy3QMOtEvwDpjjWMl7T/

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5096
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4808

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    38KB

    MD5

    e547b845318136528e4979ab157d0381

    SHA1

    719e2d2de5a3e345ed683acde5efbfb8e2c30ec7

    SHA256

    4f0c75062cbfa8b8ba0fab15ed3366fcd09e1e0f857b083f792dbdddbc15c91d

    SHA512

    c8435ce0ecf61ff26fdacc1d7a032137326f80f11c23f05cef888988e9a5698c48f5072f779e79db0997b0debfddf41e91c52599d399100d301f440114a73ae1

  • memory/4808-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4808-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4808-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4808-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5096-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5096-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/5096-3-0x0000000002090000-0x0000000002096000-memory.dmp

    Filesize

    24KB

  • memory/5096-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/5096-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB