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Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    20/05/2024, 06:35

General

  • Target

    2024-05-20_4f2f7c79ad5317e16f18d2bde3ee64bf_cryptolocker.exe

  • Size

    52KB

  • MD5

    4f2f7c79ad5317e16f18d2bde3ee64bf

  • SHA1

    53178e6f019b4d0d38b92cc2ce33ee7394dbc5a0

  • SHA256

    fa1cb6e51aef9557496cd1cdfd43dc0f414dd356f68cb45788e49d4de0ed5245

  • SHA512

    59e2dce81dbc81d3f115298f4dc3cb05163d6b5e5d4bc62d45d41beef676688dee408174c161fddc348bd32f087af791caeb3970383ddca7b712beaad44a84be

  • SSDEEP

    768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOO:bODOw9acifAoc+vB

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 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 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-20_4f2f7c79ad5317e16f18d2bde3ee64bf_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-20_4f2f7c79ad5317e16f18d2bde3ee64bf_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2196
    • C:\Users\Admin\AppData\Local\Temp\lossy.exe
      "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
      2⤵
      • Executes dropped EXE
      PID:2532

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\lossy.exe

    Filesize

    52KB

    MD5

    0caa521bd794e19e0f935571661c62db

    SHA1

    4d9b34fd0e0df5a01d0067c3185bb31db4c709e7

    SHA256

    0181b70b1538e988ea1969ae7c6f3b4fb8c4002fa3ff60ba6a9dad412b56a96c

    SHA512

    d8c2cc2e7d325ba3d9acd4f3d495490ee31b44e06d37ada6cf1df2aac72db28d2d7c1d1681e0f591d480a64f3771e8e6f591ec5e86a882e855d2a43a62e68358

  • memory/2196-0-0x0000000008000000-0x000000000800F000-memory.dmp

    Filesize

    60KB

  • memory/2196-1-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/2196-2-0x0000000000280000-0x0000000000286000-memory.dmp

    Filesize

    24KB

  • memory/2196-9-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/2196-15-0x0000000008000000-0x000000000800F000-memory.dmp

    Filesize

    60KB

  • memory/2532-16-0x0000000008000000-0x000000000800F000-memory.dmp

    Filesize

    60KB

  • memory/2532-18-0x0000000000460000-0x0000000000466000-memory.dmp

    Filesize

    24KB

  • memory/2532-25-0x0000000000320000-0x0000000000326000-memory.dmp

    Filesize

    24KB

  • memory/2532-26-0x0000000008000000-0x000000000800F000-memory.dmp

    Filesize

    60KB