Analysis

  • max time kernel
    16s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    22/02/2024, 17:48

General

  • Target

    2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe

  • Size

    31KB

  • MD5

    aa64fef12286342a6b5de2fd9bfa853c

  • SHA1

    ba4466c2fb7148c92849694d428a46dc07c5d3b9

  • SHA256

    a916bf519645d34dc9a55f47fb864b9074406be5311a88dd5193ddef8262a3e0

  • SHA512

    e206e59e7fc494197258ae65c08d459a7fd66d6741ba65b09f1185f972511f3168a867a875daed6850c3be789f4fbe84bc272c1639501ac818bf53aea6604909

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUssoYL:b/yC4GyNM01GuQMNXw2PSjWoYL

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_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:3032
    • 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:2884

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          32KB

          MD5

          533b9b2805c6ed4944bec0d6be0ec4dd

          SHA1

          415737c064168b442a055a405a22c6c154d9b35a

          SHA256

          ede8df99d99dd15dedff2705d65c52485817a644946f58818c46715e69d3d2d2

          SHA512

          887f72d098848aec2eeb231c8c753698c70645a748d904d3ce39a4634fa2dda5591aa70685fcfa7f73f75387f0da84ce44d5941feba611179c3e79585c7232b7

        • memory/2884-17-0x00000000003C0000-0x00000000003C6000-memory.dmp

          Filesize

          24KB

        • memory/3032-0-0x00000000002C0000-0x00000000002C6000-memory.dmp

          Filesize

          24KB

        • memory/3032-1-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/3032-3-0x00000000002C0000-0x00000000002C6000-memory.dmp

          Filesize

          24KB