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Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/06/2024, 22:23

General

  • Target

    2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe

  • Size

    54KB

  • MD5

    7b3150834ae0eb4b44dbafc9ffaa026d

  • SHA1

    d084a4cda5efde844bb2734a6a7a4a75077c0256

  • SHA256

    606250304f55e21f0f3a4ed0d3d0807f2fca7fb84b296417787b216ff66e6742

  • SHA512

    5f3dc382449a257715034d8dfe1b3675ed84b3e490915bf916ea854a9e0e2b1aa759b2e1a97c2906da86df9ba27a1e7e90dab2a19b41ca0906c22bd1b1ec5223

  • SSDEEP

    768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFP5:b7/y28wZEjbnouy8G76iH/NLpz

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 2 IoCs
  • UPX dump on OEP (original entry point) 2 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 2 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\2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3100
    • C:\Users\Admin\AppData\Local\Temp\rewok.exe
      "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
      2⤵
      • Executes dropped EXE
      PID:3620

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    55KB

    MD5

    ae687314e7e12f5651088071ebfe1780

    SHA1

    c8ddda4ef712ab235c7b4763b1f9e4efa2c168ba

    SHA256

    edb2aa00c3ed2eb30b06b686b71b8b6ab22b9000b630542e47bfe386798fbfed

    SHA512

    f13226b17a8d7d206900722ae50e404d19ea96fa5ef79e91a1a43ddbdf376da5b08910647287349aa38a12e42b9243f5255546a620fe393a259068c7ad7f8c72

  • memory/3100-0-0x0000000000400000-0x000000000040E000-memory.dmp

    Filesize

    56KB

  • memory/3100-1-0x0000000002120000-0x0000000002126000-memory.dmp

    Filesize

    24KB

  • memory/3100-2-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/3100-9-0x0000000002120000-0x0000000002126000-memory.dmp

    Filesize

    24KB

  • memory/3620-26-0x0000000002D60000-0x0000000002D66000-memory.dmp

    Filesize

    24KB