Analysis

  • max time kernel
    4s
  • max time network
    82s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    22/02/2024, 20:47

General

  • Target

    2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe

  • Size

    31KB

  • MD5

    f335673f25f838240b76ee713f786f02

  • SHA1

    44f8e47f4393265c0ba78b6d36a2cedc1e03d77d

  • SHA256

    0edb5a71269986b02bfea9b1a16a0f7c4bdb73fe99083dacb2f30b524214d871

  • SHA512

    1b1c63b3e82c64840ab6df409b598b8fc1e0e66f913da4d8054159f67daa82ef628df1b7ecf8675983e6e3945f5aae4607aff246439fff3e0381c19b82bccff1

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn8YtI:b/yC4GyNM01GuQMNXw2PSj6

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\2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:1712
    • 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:2120

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          31KB

          MD5

          7bd6a9cb61b48e862024957f6cefdaff

          SHA1

          7a8a365c2d57966b8643b30e3ff43d491489737c

          SHA256

          eb88d4d90d75c9fc6b963e07c46f12d94c766514863af95efb6bc7c26980fe35

          SHA512

          348dc6d94e06e296e9211a8537c1429fbbb9d5c21593fd2596f6442bf1d9931ec160e379b06c24cc9e5838cc64415252831b47b6a4ff6fb5a686c56a9bc15a33

        • memory/1712-0-0x0000000000340000-0x0000000000346000-memory.dmp

          Filesize

          24KB

        • memory/1712-1-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/1712-2-0x0000000000340000-0x0000000000346000-memory.dmp

          Filesize

          24KB

        • memory/2120-23-0x0000000000390000-0x0000000000396000-memory.dmp

          Filesize

          24KB