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Analysis

  • max time kernel
    126s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/04/2024, 04:31

General

  • Target

    2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe

  • Size

    42KB

  • MD5

    3b05b83bad2ea449253c73fc6f96d0d2

  • SHA1

    260b3ffbc4a527215dd4eeb42284c6097989e01d

  • SHA256

    33743ebaf50fc6aed826fac05a48d8a5f61701c73e40cb6104b45235e56f10b0

  • SHA512

    5e41eca41835e59b2491079fe65a163489146abc4d928744fc9008953d9b155636e0a66715e127c8c112ff19aa81688dc1e34d2e9d78e8f02daa5da4b6114ba0

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHR8uye/:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZL/

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • 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\2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3184
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:1248
  • 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=3020 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1768

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      42KB

      MD5

      c3e9f910712dffc03177ee543f13af6e

      SHA1

      8e8cc8954c6988d4dc24221b136dda1f731ed6c9

      SHA256

      56f5ccd7b3d30af0518fc13a6696bac3bb9d623ab40349a627258e75af918d2a

      SHA512

      b4ea554c7469355895ba5e9a5382230be856d4283f51370a216b3b3b4d2131ad24f8179b9fceff7b5a69553823cc17b27c5125d44b7aa5b78e0b43aed365127a

    • memory/1248-17-0x0000000002D60000-0x0000000002D66000-memory.dmp

      Filesize

      24KB

    • memory/3184-0-0x0000000002090000-0x0000000002096000-memory.dmp

      Filesize

      24KB

    • memory/3184-1-0x0000000002090000-0x0000000002096000-memory.dmp

      Filesize

      24KB

    • memory/3184-2-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB