Analysis

  • max time kernel
    141s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/02/2024, 06:12

General

  • Target

    2024-02-13_b4396bcad24d9d5c83eb12bfc2d56620_cryptolocker.exe

  • Size

    44KB

  • MD5

    b4396bcad24d9d5c83eb12bfc2d56620

  • SHA1

    f10b3339af039bef7e5db207afe7aa0c4aaa71a1

  • SHA256

    40bd859fbcdaf91608d996a0643a26d7c5c58fd461e3457eac0f45dd97b3892f

  • SHA512

    f86f883c1ece3a4930b58bd8d2477563c7a67519a233b9323df4d85a170ffaffc50bc29f4de35f7c21661b6eefcc97c83943ed4108f28b21f03d07826cf1778d

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjIm8z2iaSIO/WZrEu/d+qmsUHQ1wsu:ZzFbxmLPWQMOtEvwDpj386Sj/WprqQ1s

Score
9/10

Malware Config

Signatures

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

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-13_b4396bcad24d9d5c83eb12bfc2d56620_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-13_b4396bcad24d9d5c83eb12bfc2d56620_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3080
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:1464

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          45KB

          MD5

          71607031e81a2d087a5f9928c2527820

          SHA1

          d159fc148f3585a83f0540f6617f3f1857048304

          SHA256

          027b33a49804f91233dd5354364ecc45f2083c3ebc193361239a952369702071

          SHA512

          cce7d1fe7135d32c73d55259b73d3b1094af0adf95e45fa26fc2ceb027bf79a1c0c91324c479ba1360aa3158861177f2a7782da1c566a020292da69af40eb7f6

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/1464-17-0x0000000000450000-0x0000000000490000-memory.dmp

          Filesize

          256KB

        • memory/1464-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/1464-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/3080-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

          Filesize

          12KB

        • memory/3080-1-0x0000000000620000-0x0000000000626000-memory.dmp

          Filesize

          24KB

        • memory/3080-2-0x0000000000620000-0x0000000000626000-memory.dmp

          Filesize

          24KB

        • memory/3080-3-0x0000000000750000-0x0000000000756000-memory.dmp

          Filesize

          24KB

        • memory/3080-19-0x00000000004E0000-0x00000000004E3000-memory.dmp

          Filesize

          12KB