Analysis

  • max time kernel
    18s
  • 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, 10:53

General

  • Target

    2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker.exe

  • Size

    34KB

  • MD5

    8a5ca1f1ea6229115d0a471c96a80dc7

  • SHA1

    9a5616d701c62211d8aec84af080eaba615a0913

  • SHA256

    829baaf34b074e7efe50d68a19a022d3085e2c8b74bff6742785145dfd4b6c2c

  • SHA512

    ef6a7b64be5a4b4e84f7d892474d236e6ea154177b6cb5f3cfd1750cffba52f346c58a1c647537620aae068088f946c25ea7a5d30fabca4383e1201c2e10f1d0

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIJ3M:b/yC4GyNM01GuQMNXw2PSjH+P1c

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_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:1860
    • 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:2280

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          34KB

          MD5

          83ecf5187dcb5a86da7a441b56e3b74a

          SHA1

          d213e561c064ed3f343d9ee42934c355d485124a

          SHA256

          16df08ec826bd1b514ef0f129cdda4eaf78c28ef798f294804981e6d3f78ef4f

          SHA512

          b151732e9ea488c3d43a4f1cddfe01cbdfb0351f2f5d3b9ff09ab1e08268474d936c1c7f5df6e9653404e1d87826db42745c7fa2cf1207067bde956fb38a16b5

        • memory/1860-0-0x0000000000340000-0x0000000000346000-memory.dmp

          Filesize

          24KB

        • memory/1860-1-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/1860-2-0x0000000000340000-0x0000000000346000-memory.dmp

          Filesize

          24KB

        • memory/2280-17-0x00000000003C0000-0x00000000003C6000-memory.dmp

          Filesize

          24KB