Overview

overview

10

Static

static

Jigsaw.exe

windows7_x64

10

Jigsaw.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    452s
  • max time network
    431s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    11/05/2022, 20:30

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General

  • Target
    Jigsaw.exe
  • Size 283KB
  • Sample220511-y96drshfc2
  • SHA256 3ae96f73d805e1d3995253db4d910300d8442ea603737a1428b613061e7f61e7
  • MD5 SHA1 SHA512
Score
10/10
jigsawpersistenceransomware

Malware Config

Signatures

  • Jigsaw Ransomware

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

    ransomwarejigsaw
  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 3 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Checks computer location settings 2 TTPs 1 IoCs

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

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

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • 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:5060
    • 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
      • Modifies extensions of user files
      • Drops file in Program Files directory
      PID:4452
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:2024

Network

        MITRE ATT&CK Enterprise v6

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        Downloads

        drpbx.exe
        • Path C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
        • Size 283KB
        • SHA256 3ae96f73d805e1d3995253db4d910300d8442ea603737a1428b613061e7f61e7
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        drpbx.exe
        • Path C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
        • Size 283KB
        • SHA256 3ae96f73d805e1d3995253db4d910300d8442ea603737a1428b613061e7f61e7
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        firefox.exe
        • Path C:\Users\Admin\AppData\Roaming\Frfx\firefox.exe
        • Size 283KB
        • SHA256 3ae96f73d805e1d3995253db4d910300d8442ea603737a1428b613061e7f61e7
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/4452-134-0x00007FFABB300000-0x00007FFABBD36000-memory.dmp
        Download

        memory/5060-130-0x00007FFABB300000-0x00007FFABBD36000-memory.dmp
        Download