Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240730-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-08-2024 06:29

General

  • Target

    835cbba608ad354eeaf5671108d39450_JaffaCakes118.dll

  • Size

    5.0MB

  • MD5

    835cbba608ad354eeaf5671108d39450

  • SHA1

    d3fa0e70ead6f25317d2ba822a04562422c205b7

  • SHA256

    278cc6e804a8c54e71c0ea8565fbe21ebbf2dad3a0bbe3bfe13c324292abe076

  • SHA512

    30e4e8a17105113e5bec76126b2f47534f94ce8dfc9af652a059809b55401f38af50473b060923c19e3434ad62eef696dabf408652b7254a70c421b68ffbf91c

  • SSDEEP

    98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVtvH:+DqPe1Cxcxk3ZAEUadzR8yctvH

Malware Config

Signatures

  • Wannacry

    WannaCry is a ransomware cryptoworm.

  • Contacts a large (3217) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Executes dropped EXE 3 IoCs
  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Drops file in Windows directory 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\835cbba608ad354eeaf5671108d39450_JaffaCakes118.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3472
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\835cbba608ad354eeaf5671108d39450_JaffaCakes118.dll,#1
      2⤵
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3224
      • C:\WINDOWS\mssecsvc.exe
        C:\WINDOWS\mssecsvc.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:4592
        • C:\WINDOWS\tasksche.exe
          C:\WINDOWS\tasksche.exe /i
          4⤵
          • Executes dropped EXE
          PID:4204
  • C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe -m security
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Modifies data under HKEY_USERS
    PID:3772

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\mssecsvc.exe

    Filesize

    3.6MB

    MD5

    27940c947e92ac57b911d998cfe75155

    SHA1

    81eed2afec3d4862787f70e69bf098f7c010edb2

    SHA256

    a8b805578eeaf6c2df2622543db60e80535491f3733a2da72df99d07aa390e46

    SHA512

    aea3b56a35f62bd5ed7afa25c01b7809add1c80cd1d2744328c36f147791d4d681d8016784d1ba7472f9eeec031b0bcadccc74db6f27079b79e088400321eec6

  • C:\Windows\tasksche.exe

    Filesize

    3.4MB

    MD5

    3454acf3aa69e037b909ed9edf4cc422

    SHA1

    d447a59d679894ac1fcdd996882840cb84d1a4ca

    SHA256

    fcb6fd1d5b75cabe08536334b3c6ad99aa198d0659264910d6744b6b9171b166

    SHA512

    8ca7e7d74151c711e1bf900d69b80a56ce5bcadc91ace85c550bb27ae854ffb5c4945b29b8c22e5479c651ce8a0d1f8a614763ae00ea2079aa78c4cd61e4f418