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Analysis

  • max time kernel
    142s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/03/2024, 05:38

General

  • Target

    2024-03-08_33b81f5b19dc97db87af3be7fbc7eb16_cryptolocker.exe

  • Size

    57KB

  • MD5

    33b81f5b19dc97db87af3be7fbc7eb16

  • SHA1

    eacd0bd287994f60549a806eeaad835c6d76bbed

  • SHA256

    ac9beb13ac13282a57adc29bfbe36620ecfb98295fff31b0d497540059e74359

  • SHA512

    5df3ab00de99b851c56f68f00433fab736d979120713d5deb7b3f3fe0b9597162f3a5c8bf7812e03c6816b649367129d8a3609e2ff5c18146209747522026b5d

  • SSDEEP

    768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5ax8ikfk:z6QFElP6n+gKmddpMOtEvwDpj9aYai8

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\2024-03-08_33b81f5b19dc97db87af3be7fbc7eb16_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-08_33b81f5b19dc97db87af3be7fbc7eb16_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3244
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:1612
  • 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 --mojo-platform-channel-handle=4048 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2452

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      57KB

      MD5

      c41664ca06e7fa15637543385e6931c0

      SHA1

      60829e2e50c8485bcfe58f2c8db5ea7f6eb5d1d2

      SHA256

      dcc615c2e1cc60df1a780a46871ef7968441757d761706820ae29b50127370d5

      SHA512

      c6a7097bb382e2f7db57115b2f671e32290f274c100702f4cb2dab8df162d1602e3eceb63cda35acce1d90e7de1758f50bb4787caa4b77d56deee2fbdf6a77b4

    • memory/1612-18-0x0000000002140000-0x0000000002146000-memory.dmp

      Filesize

      24KB

    • memory/1612-19-0x0000000002040000-0x0000000002046000-memory.dmp

      Filesize

      24KB

    • memory/1612-26-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3244-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3244-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/3244-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/3244-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

      Filesize

      24KB

    • memory/3244-25-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB