Overview

overview

10

Static

static

drpbx.exe

windows7_x64

10

drpbx.exe

windows10_x64

10

Resubmissions

09/10/2023, 22:49

231009-2ry4hsba2610

06/03/2021, 22:23

210306-pfhc83235s10

05/06/2020, 02:52

200605-jqylqtyzss10

Analysis

  • max time kernel
    150s
  • max time network
    112s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    06/03/2021, 22:23

Sharing

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General

  • Target
    drpbx.exe
  • Size 125KB
  • Sample210306-pfhc83235s
  • SHA256 6f94e5747ba1aaa2bb666704ee65b37aac8aff47dbc321be2b607d47dd695e8f
  • MD5 SHA1 SHA512
Score
10/10
jigsawpersistenceransomwarespyware

Malware Config

Signatures

  • Jigsaw Ransomware

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

    ransomwarejigsaw
  • Suspicious use of NtCreateProcessExOtherParentProcess 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 1 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Reads user/profile data of web browsers 2 TTPs

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

    spyware
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Drops desktop.ini file(s) 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 3 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 6 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\drpbx.exe
    "C:\Users\Admin\AppData\Local\Temp\drpbx.exe"
    1⤵
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:3008
    • C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
      "C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\drpbx.exe
      2⤵
      • Executes dropped EXE
      • Modifies extensions of user files
      • Drops file in Program Files directory
      PID:2112
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Suspicious use of NtCreateProcessExOtherParentProcess
    • 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:3560
  • C:\Windows\system32\werfault.exe
    werfault.exe /h /shared Global\79ecef5938984a3c9c83e4f773e06057 /t 2188 /p 2112
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2488
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2052
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=86.0.4240.111 --initial-client-data=0xc8,0xcc,0xd0,0xa4,0xd4,0x7ff8247b6e00,0x7ff8247b6e10,0x7ff8247b6e20
      2⤵
        PID:2752

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/2112-10-0x00000000009A4000-0x00000000009A5000-memory.dmp
          Download

          memory/2112-8-0x00007FF81EAB0000-0x00007FF81F450000-memory.dmp
          Download

          memory/2112-9-0x00000000009A0000-0x00000000009A2000-memory.dmp
          Download

          memory/2112-12-0x00000000009A8000-0x00000000009AA000-memory.dmp
          Download

          memory/2112-13-0x00000000009AA000-0x00000000009AF000-memory.dmp
          Download

          memory/2488-15-0x000001F7D0D50000-0x000001F7D0D51000-memory.dmp
          Download

          memory/2488-14-0x000001F7D0D50000-0x000001F7D0D51000-memory.dmp
          Download

          memory/3008-2-0x00007FF81EAB0000-0x00007FF81F450000-memory.dmp
          Download

          memory/3008-3-0x0000000000B40000-0x0000000000B42000-memory.dmp
          Download