Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/02/2024, 01:42

General

  • Target

    2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe

  • Size

    62KB

  • MD5

    99cf265bfcdc606e7eec424693ba3738

  • SHA1

    83a50c9089b4fc1ccf8daa0a0de034e436be1f78

  • SHA256

    c58a25a4d00c0dba3232c97c9813d3dc6f1eb0666cf556aae59c83f876029b0e

  • SHA512

    d72900ef01d5df6358adea8a351967221c09e36b4403a4c37eb6db2837d1697bfd4f09be3f30af914dc369d803cdcb26177695361ac1463317910f52de064a8f

  • SSDEEP

    1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8M:1nK6a+qdOOtEvwDpjk

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 4 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 4 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\2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3692
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3964

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    7340135fc85db5a113a994734ec46460

    SHA1

    6d35ee8176f93315e5d1649d2662edd4e7295d17

    SHA256

    bbbb06dd888cb5826cc77d3213723c1b67701ce6ec85b2ef8159685afbd81ba3

    SHA512

    d8da0a08f23f8f9ba1f00769df278e6d8b6e3e7ca41acf5850cd5e5a9f8f65cc178a347f3b3938e4b2dc407e23c3a0f664c9285dc31a5340ab64db65b9b28499

  • memory/3692-0-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB

  • memory/3692-1-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/3692-2-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/3692-3-0x0000000000770000-0x0000000000776000-memory.dmp

    Filesize

    24KB

  • memory/3692-18-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB

  • memory/3964-19-0x0000000002060000-0x0000000002066000-memory.dmp

    Filesize

    24KB

  • memory/3964-23-0x0000000002150000-0x0000000002156000-memory.dmp

    Filesize

    24KB

  • memory/3964-26-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB