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Analysis

  • max time kernel
    147s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/05/2024, 10:22

General

  • Target

    2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe

  • Size

    37KB

  • MD5

    03fbce37e4e6808ca57e054bd6daa17e

  • SHA1

    7e9553c629f707f4f2478fd2694adbde3f206c93

  • SHA256

    3e0c47116373cfab04558f602b53701da88dfc42567007687146950d04d60997

  • SHA512

    c5216a2c7ea274f1f64fbea017842c5bf7529f6869ef5440ed511b604684a23068792a0551502b72b9c9fdce3c194145a7d0e95db10ff1ed1c3111798203ed27

  • SSDEEP

    768:b7o/2n1TCraU6GD1a4Xt9bRU6zA6o36mJ:bc/y2lLRU6zA6qJ

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\2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3640
    • C:\Users\Admin\AppData\Local\Temp\rewok.exe
      "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
      2⤵
      • Executes dropped EXE
      PID:2268
  • 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=1040 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2824

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      37KB

      MD5

      384bebec2a2041742f0365daa2168e8d

      SHA1

      88d7de0ad70084db3b77a89785b1e0f8091c644f

      SHA256

      141a41dd50216c666a007af8403ec2d63a946e8ca0043cfeed0f383f7daa99c9

      SHA512

      6ea9ed03bb335dc657045c5a07d2eb041bd47372d5d7f5b868a19afe675993ee9a888af0c73b9b8583f187d251098bea98f87108f81891813cdbb8dd9b25aff0

    • memory/2268-26-0x0000000002110000-0x0000000002116000-memory.dmp

      Filesize

      24KB

    • memory/3640-0-0x0000000002140000-0x0000000002146000-memory.dmp

      Filesize

      24KB

    • memory/3640-1-0x0000000002140000-0x0000000002146000-memory.dmp

      Filesize

      24KB

    • memory/3640-2-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB