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Analysis

  • max time kernel
    148s
  • 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
    31/05/2024, 20:27

General

  • Target

    2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe

  • Size

    90KB

  • MD5

    53a2668143f5e807d3d60adab893e8d3

  • SHA1

    5060b5ffee8d8d20b803eafc3f9c33f27cf0eb5a

  • SHA256

    1621dbc1ba1fb655350be8b062311d823ddf51d9880f0a6d93b58184b46d600e

  • SHA512

    efd5e21570a51c1689a149de058e058130ca4e828d9b2cc2b0dbcf3d0a688e13ab946ee7272321ed1ad2466b76787e29455052f4b9a54143112b13acd8d52221

  • SSDEEP

    1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAyE:n6a+1SEOtEvwDpjYYvQd2PN

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\2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3796
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2784
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4048,i,15140928051103392835,1612840580898364401,262144 --variations-seed-version --mojo-platform-channel-handle=4836 /prefetch:8
    1⤵
      PID:1904

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      91KB

      MD5

      0d3b122650833e4e59e188ea7c642d53

      SHA1

      b7fc5a0bd3d5496810288083b84aad3f540fba17

      SHA256

      f9c704a5956a4d701acf043e9289d738892871ee3aefe0fe4898022a1491cd5c

      SHA512

      9a3db6485db9c8928a5b3bc654652ba4460ab1a6dbedc9cb4efcdc02a943160aba18d064e6e22edbe24267ffd4e058588ae237254f4f35a13140d8010780de1c

    • memory/2784-17-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/2784-20-0x00000000006E0000-0x00000000006E6000-memory.dmp

      Filesize

      24KB

    • memory/2784-26-0x00000000006C0000-0x00000000006C6000-memory.dmp

      Filesize

      24KB

    • memory/2784-27-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3796-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3796-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/3796-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/3796-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/3796-18-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB