Analysis

  • max time kernel
    154s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/03/2024, 11:45

General

  • Target

    2024-03-06_f85b4e0852d49ee05cfe0444c2a4b6b4_cryptolocker.exe

  • Size

    32KB

  • MD5

    f85b4e0852d49ee05cfe0444c2a4b6b4

  • SHA1

    398852885cc04c95e7fece27a926805a5bb62e4f

  • SHA256

    b32c801c72cb86959a6e241efb712bb49446acb8cf691c1799e5c80f46b58f55

  • SHA512

    572c70ef2d276b3420dbd3b91886ca4f9f57c24ba318827aa83bf482debe90694fbe006dd899240f8a644d03dcec435629515a4f61b83db774a74c57478bbfdc

  • SSDEEP

    768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+4tHmNg9:q0zizzOSxMOtEvwDpj/arqcQ

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 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
  • 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\2024-03-06_f85b4e0852d49ee05cfe0444c2a4b6b4_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-06_f85b4e0852d49ee05cfe0444c2a4b6b4_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:780
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3112
  • 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=1416 --field-trial-handle=3088,i,14310325015283915034,7660943942870463106,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:452

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

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

            Filesize

            32KB

            MD5

            e232addf26aa70e6d5649518069484f4

            SHA1

            94e03d3cb8da7703e160b4bb4debab3c03e5c312

            SHA256

            8c74ae9b4e6e29dc74985d2cdb18d69f9a4cab1b9d3dea90e2b4b7af6d379936

            SHA512

            0291d7e0972f8c7add419b3e3fa74f6f61ad6573ae755983e324da13b2f0af6831dd22c0abd522c506b9146bbcce5151839f6fcb920e79a9ac3371b87ee99a35

          • memory/780-0-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB

          • memory/780-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

            Filesize

            24KB

          • memory/780-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

            Filesize

            24KB

          • memory/780-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

            Filesize

            24KB

          • memory/780-25-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB

          • memory/3112-18-0x00000000004D0000-0x00000000004D6000-memory.dmp

            Filesize

            24KB

          • memory/3112-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

            Filesize

            24KB

          • memory/3112-26-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB