Analysis

  • max time kernel
    14s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    27/05/2024, 18:37

General

  • Target

    2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe

  • Size

    41KB

  • MD5

    a1911cf727fe388c5a6806262a0a78ef

  • SHA1

    67ed1ddc0eee967d8e3d894df0b1a494b91948de

  • SHA256

    96b4bd5b7368b7edebc5a515978c32be9373046ec3488cb1ae6741eb8519c548

  • SHA512

    fd617374bd764ab99e18193f1cb756f8d9bb3dea299f8b86824f74285b901434db23f49f53b9007d38f0ad1862801f1ae185f2bea2d13f0a78da9de710ca1695

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHR8uyvT:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZ6T

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\2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_a1911cf727fe388c5a6806262a0a78ef_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:2316

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          41KB

          MD5

          830634c406589c2469c155a650eacf8c

          SHA1

          9704f506599b910e43245d77aa637d250ff70e55

          SHA256

          858d80c54c4054f77da3c66de98caa79cff6befdea99090e7c91b4d8a1818e17

          SHA512

          5ed1f6eafc4dc935f323e89a55315590a33609bf154c34f1e48b5f3612f42749dbb0a204c26170ea9a4bd132b48a96143f95c77d32c3f1abc68888f7ff69a3ff

        • memory/1860-8-0x0000000000310000-0x0000000000316000-memory.dmp

          Filesize

          24KB

        • memory/1860-0-0x0000000000310000-0x0000000000316000-memory.dmp

          Filesize

          24KB

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

          Filesize

          24KB

        • memory/2316-23-0x00000000005C0000-0x00000000005C6000-memory.dmp

          Filesize

          24KB