Analysis

  • max time kernel
    10s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    23/02/2024, 12:50

General

  • Target

    2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe

  • Size

    28KB

  • MD5

    92aa3dfa8691f919541fd84daea2717a

  • SHA1

    6fc306fbb727b0dca9690704586dd4e332fa2f94

  • SHA256

    4fc821f8e0fab3f4f3c9698a75cd2e92a098c1a8552e52297d7e4a5d32d6a8a4

  • SHA512

    2de4cc3f8f448fec138f84e5d9b23fded8a44c28bfed0d01b76155ca5cff4eae2f6f0482f82c57fb4ae9777bc82744b050f7143ba3c55650cd436bc2c2fb1658

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+UUA3:b/yC4GyNM01GuQMNXum+3A3

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of UnmapMainImage 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:2120
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of UnmapMainImage
      PID:2124

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          28KB

          MD5

          485c41fa1d2f63d1421170405104642b

          SHA1

          c521545aa3b4aaffe42d499dbffc3b21760e966c

          SHA256

          d982d00f1d89802c5bfe978550ccae63afff54faea5d4222ccd53d9171f6e8e9

          SHA512

          a2caede05142b57b86cdf9ee54e6f660401b592729efaccba76085b090905035be8d9dd8bd33bdc795b7033d014f4199c0534844931ca185f63e0976d5cc25ba

        • memory/2120-3-0x0000000000270000-0x0000000000276000-memory.dmp

          Filesize

          24KB

        • memory/2120-1-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/2120-0-0x0000000000270000-0x0000000000276000-memory.dmp

          Filesize

          24KB

        • memory/2124-16-0x0000000000260000-0x0000000000266000-memory.dmp

          Filesize

          24KB