Analysis

  • max time kernel
    14s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    28/05/2024, 00:55

General

  • Target

    2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe

  • Size

    31KB

  • MD5

    b8741809ef30f0c5fdbc8067af86518f

  • SHA1

    333e066fa0930b0564bf53db5b2b57662b86fab0

  • SHA256

    58bb3931e32bd0e05923489f47755c4f4e8c4ae2ca3f0b64aa4699508292e340

  • SHA512

    0eb1b7e558a9d314d9837346b840b8b484033e3aaa7b8764ad74115dfc6320b291b10096e22d5fde44dd5e7697d786b445d974722e041029170835b2c50b4d09

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+U8Ss87vh4:b/yC4GyNM01GuQMNXum+NSn4

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\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:848
    • 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:1808

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          31KB

          MD5

          18cdfca6b82c63cebf7c44f4367161de

          SHA1

          1ca476fcd4906d095a7ecdf8eeb2a1e2f6f9ef54

          SHA256

          81f92df47c58da83cc3e7a2132d8910a5ee4a07837e992d63481625723f7c813

          SHA512

          ce63abee689bfd6b4c49f5aa8dc31ea97d0be95afdea08e94541225ea35d4c3619f0bd43c82ae8611158e6fd60430f0aa16106951d6edf5132ada9568870a2df

        • memory/848-8-0x00000000003F0000-0x00000000003F6000-memory.dmp

          Filesize

          24KB

        • memory/848-1-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/848-0-0x00000000003F0000-0x00000000003F6000-memory.dmp

          Filesize

          24KB

        • memory/1808-23-0x0000000000380000-0x0000000000386000-memory.dmp

          Filesize

          24KB