Resubmissions

09-10-2023 22:49

231009-2rygzsba25 10

05-11-2020 14:30

201105-hj6s8pwrks 10

Analysis

  • max time kernel
    261s
  • max time network
    263s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    05-11-2020 14:30

General

  • Target

    Compito matematica.pdf.exe

  • Size

    606KB

  • MD5

    4e890ba5a4f6fd63727c0005daa654dd

  • SHA1

    e9ade30c93942c3f5928522552dd01eb25a9e9db

  • SHA256

    e1c7d34fc0138d018f9e947af3dac7ec4d0fe9751dd1bc4424b185a92ca4bc51

  • SHA512

    177badec70b21ed1b94a8a235535249c94b72e21fc62bae1e8c32e44b9495006687a2ef7545256ddaa2c167d870515de45e9aea524e3081135fa901532af6477

Malware Config

Signatures

  • Jigsaw Ransomware

    Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops file in Program Files directory 4932 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Compito matematica.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Compito matematica.pdf.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1904
    • C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
      "C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\Compito?matematica.pdf.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      PID:1732

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1732-5-0x000007FEF5630000-0x000007FEF5FCD000-memory.dmp

    Filesize

    9.6MB

  • memory/1732-6-0x000007FEF5630000-0x000007FEF5FCD000-memory.dmp

    Filesize

    9.6MB

  • memory/1732-7-0x000000001C0E0000-0x000000001C100000-memory.dmp

    Filesize

    128KB

  • memory/1732-13-0x000000001C101000-0x000000001C1F9000-memory.dmp

    Filesize

    992KB

  • memory/1904-0-0x000007FEF5630000-0x000007FEF5FCD000-memory.dmp

    Filesize

    9.6MB

  • memory/1904-1-0x000007FEF5630000-0x000007FEF5FCD000-memory.dmp

    Filesize

    9.6MB