Analysis

  • max time kernel
    37s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    26-08-2024 01:14

General

  • Target

    Jigsaw.exe

  • Size

    283KB

  • MD5

    2773e3dc59472296cb0024ba7715a64e

  • SHA1

    27d99fbca067f478bb91cdbcb92f13a828b00859

  • SHA256

    3ae96f73d805e1d3995253db4d910300d8442ea603737a1428b613061e7f61e7

  • SHA512

    6ef530b209f8ec459cca66dbf2c31ec96c5f7d609f17fa3b877d276968032fbc6132ea4a45ed1450fb6c5d730a7c9349bf4481e28befaea6b119ec0ded842262

  • SSDEEP

    6144:7fukPLPvucHiQQQ4uuy9ApZbZWxcZt+kTfMLJTOAZiYSXjjeqXus:7fu5cCT7yYlWi8kTfMLJTOAZiYSXjyqX

Malware Config

Signatures

  • Jigsaw Ransomware

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

  • Renames multiple (224) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Jigsaw.exe
    "C:\Users\Admin\AppData\Local\Temp\Jigsaw.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1488
    • C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
      "C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\Jigsaw.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      PID:1880

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe

    Filesize

    283KB

    MD5

    2773e3dc59472296cb0024ba7715a64e

    SHA1

    27d99fbca067f478bb91cdbcb92f13a828b00859

    SHA256

    3ae96f73d805e1d3995253db4d910300d8442ea603737a1428b613061e7f61e7

    SHA512

    6ef530b209f8ec459cca66dbf2c31ec96c5f7d609f17fa3b877d276968032fbc6132ea4a45ed1450fb6c5d730a7c9349bf4481e28befaea6b119ec0ded842262

  • memory/1488-0-0x00007FFD13025000-0x00007FFD13026000-memory.dmp

    Filesize

    4KB

  • memory/1488-1-0x00007FFD12D70000-0x00007FFD13711000-memory.dmp

    Filesize

    9.6MB

  • memory/1488-2-0x00007FFD12D70000-0x00007FFD13711000-memory.dmp

    Filesize

    9.6MB

  • memory/1488-3-0x0000000001740000-0x0000000001778000-memory.dmp

    Filesize

    224KB

  • memory/1488-4-0x000000001C390000-0x000000001C85E000-memory.dmp

    Filesize

    4.8MB

  • memory/1488-5-0x000000001C900000-0x000000001C99C000-memory.dmp

    Filesize

    624KB

  • memory/1488-20-0x00007FFD12D70000-0x00007FFD13711000-memory.dmp

    Filesize

    9.6MB

  • memory/1880-19-0x00007FFD12D70000-0x00007FFD13711000-memory.dmp

    Filesize

    9.6MB

  • memory/1880-21-0x00007FFD12D70000-0x00007FFD13711000-memory.dmp

    Filesize

    9.6MB

  • memory/1880-22-0x00007FFD12D70000-0x00007FFD13711000-memory.dmp

    Filesize

    9.6MB

  • memory/1880-23-0x000000001BAC0000-0x000000001BAC8000-memory.dmp

    Filesize

    32KB