Resubmissions

17-12-2023 09:25

231217-ld4tvafee8 10

17-12-2023 09:25

231217-ldtc4sfee7 10

17-12-2023 03:55

231217-eg3bvsdgbm 10

Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-12-2023 03:55

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 (227) files with added filename extension

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1212
    • 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:5016

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/1212-3-0x000000001BEA0000-0x000000001BED8000-memory.dmp

    Filesize

    224KB

  • memory/1212-2-0x00007FFE0A660000-0x00007FFE0B001000-memory.dmp

    Filesize

    9.6MB

  • memory/1212-0-0x00007FFE0A660000-0x00007FFE0B001000-memory.dmp

    Filesize

    9.6MB

  • memory/1212-4-0x000000001C3D0000-0x000000001C89E000-memory.dmp

    Filesize

    4.8MB

  • memory/1212-5-0x000000001C940000-0x000000001C9DC000-memory.dmp

    Filesize

    624KB

  • memory/1212-1-0x0000000001830000-0x0000000001840000-memory.dmp

    Filesize

    64KB

  • memory/1212-19-0x00007FFE0A660000-0x00007FFE0B001000-memory.dmp

    Filesize

    9.6MB

  • memory/5016-20-0x00007FFE0A660000-0x00007FFE0B001000-memory.dmp

    Filesize

    9.6MB

  • memory/5016-21-0x00000000015A0000-0x00000000015B0000-memory.dmp

    Filesize

    64KB

  • memory/5016-22-0x00007FFE0A660000-0x00007FFE0B001000-memory.dmp

    Filesize

    9.6MB

  • memory/5016-23-0x000000001C770000-0x000000001C778000-memory.dmp

    Filesize

    32KB

  • memory/5016-44-0x00007FFE0A660000-0x00007FFE0B001000-memory.dmp

    Filesize

    9.6MB

  • memory/5016-45-0x00000000015A0000-0x00000000015B0000-memory.dmp

    Filesize

    64KB