Analysis

  • max time kernel
    148s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/05/2024, 18:30

General

  • Target

    2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe

  • Size

    38KB

  • MD5

    55a0b40c22a95eac0dbff8795ed8fc74

  • SHA1

    53c27d79eea6cf800809376a4f62b0e0d4b7d218

  • SHA256

    c89ca41e31e7a575c6ffa74026799ee5f1dd64e2a03beae1402f62a7de7f9471

  • SHA512

    2ab91de710533613f27c830b0b05f232bf60afa313ecb1cec595613ee1186304e1c092f72efe5377a7835157eba55f79a4dce823d9aab0ffae7efc4a5c6f6164

  • SSDEEP

    768:b7o/2n1TCraU6GD1a4Xt9bRU6zA6o36mhl:bc/y2lLRU6zA6qz

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\2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3816
    • C:\Users\Admin\AppData\Local\Temp\rewok.exe
      "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
      2⤵
      • Executes dropped EXE
      PID:3272
  • 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=4592,i,6166776566165096562,4582328833313060853,262144 --variations-seed-version --mojo-platform-channel-handle=4200 /prefetch:8
    1⤵
      PID:4152

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            39KB

            MD5

            ef030987595a2209bec02017a2744e52

            SHA1

            43ef072e3ec02bb6781ac2e28cc89db78486983f

            SHA256

            b28a58aca338fbebdf38af4b8968227781e98ebaaadad0f586858e6a1bd1b444

            SHA512

            03a29b5b465470bffc90df171290b3d5f5f4b4e8e204e1eabb4670381b6f8c08153a15a12dbdee850e836ecb55dd0827b4086d3a50b0e839f02bd81e309251df

          • memory/3272-25-0x0000000002D60000-0x0000000002D66000-memory.dmp

            Filesize

            24KB

          • memory/3816-0-0x0000000002120000-0x0000000002126000-memory.dmp

            Filesize

            24KB

          • memory/3816-1-0x0000000000400000-0x0000000000406000-memory.dmp

            Filesize

            24KB

          • memory/3816-8-0x0000000002120000-0x0000000002126000-memory.dmp

            Filesize

            24KB