Analysis

  • max time kernel
    30s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    07/03/2023, 01:00

General

  • Target

    a80908bcd96a8df6070eb9a9c83739c8d95c34d7d81b890bacda91bb05c53267.exe

  • Size

    2.7MB

  • MD5

    028d8a0f2eefdc87bcfde1457470789c

  • SHA1

    a9f41548d827728e44cb0296b05ae23295698c46

  • SHA256

    a80908bcd96a8df6070eb9a9c83739c8d95c34d7d81b890bacda91bb05c53267

  • SHA512

    931b9ddeba173931968f80d144a3fd851236744c12212a6e723c88ffd7c720b7ec2538b655fe680a80c66d65a3ca541bcbbf3abfd1e353eef0dfb2fa3d9594f5

  • SSDEEP

    24576:bvS4lQMNWi3VesNY8106qPN4K3P0QcejoMZLyiTtiFfkOfE:bvSy6PX3PpM+P5Id

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\How to Recovery.bat

Ransom Note
echo off color 0a cls :MENU ECHO. ECHO -----------------Attention----------------- ECHO. ECHO. Your All Files Have been Encrypted! ECHO. ECHO Your Personal files (Documents, Databases, All Drive, PDF, ETC.) We re encrypted. ECHO. But don't worry about your files,You can take back all of them, To decrypt your all files need ECHO. to buy Our Software With your unique private key. Only our software well allow decrypt your files. ECHO. Remember if you try to recovery your files through any third-party software, ECHO. it's can cause premature damage to your files, and we can't help you either. ECHO. ECHO. -----------------Note!----------------- ECHO. ECHO. You have only 72 hours from the moment when an encryption was done to buy our software at $200 for the payment ECHO. ECHO. BTC Address:- 33j4JbAEzZwWGgA2MxBARD7zprJuNDP2hP ECHO. ECHO. And if you Payment complete then Send me proof. ECHO. ECHO. Use the following ID as the title of your email:- QA2Z67DXLBFF05FHN ECHO. ECHO. Use these emails to contact us and receive instructions:- ECHO. ECHO. Main email:- [email protected] ECHO. ECHO. Secondary email ( in case of no response in 48h):- [email protected] ECHO. ECHO. Also, you can send up to 3 test files to see if we can decrypt your files. ECHO. ECHO. After paying, the decryptor software and your private key will be given to you. ECHO. SET /P M=
Wallets

33j4JbAEzZwWGgA2MxBARD7zprJuNDP2hP

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 4 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Disables Task Manager via registry modification
  • Modifies extensions of user files 8 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Drops startup file 2 IoCs
  • 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 desktop.ini file(s) 64 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\a80908bcd96a8df6070eb9a9c83739c8d95c34d7d81b890bacda91bb05c53267.exe
    "C:\Users\Admin\AppData\Local\Temp\a80908bcd96a8df6070eb9a9c83739c8d95c34d7d81b890bacda91bb05c53267.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:816
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Modifies extensions of user files
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops desktop.ini file(s)
      • Sets desktop wallpaper using registry
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1128
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1424
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:524
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1956
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1000
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:840
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:952
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1300
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1224
      • C:\Windows\system32\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Roaming\How to Recovery.bat" "
        3⤵
          PID:2736
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:948
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1232
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:896
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
          PID:1576

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\How to Recovery.bat

          Filesize

          1KB

          MD5

          f3c81a8f85b58d848f304a3823d2478a

          SHA1

          5f2a1454234bdf49ce149c2a7d3d27d45adc0237

          SHA256

          930458232b00ce183a7803bac9097afe4b94ea29beea5552546926bfe4249c58

          SHA512

          f5833ef930963dd07125e2ec81b86c0c8f6dfa18a28c2a4356df2097d7c6a960cd0182b39834c01341685d3245bc5bd70f5815f473af84c50d5d9ee5cfa93aca

        • C:\Users\Admin\AppData\Roaming\How to Recovery.bat

          Filesize

          1KB

          MD5

          f3c81a8f85b58d848f304a3823d2478a

          SHA1

          5f2a1454234bdf49ce149c2a7d3d27d45adc0237

          SHA256

          930458232b00ce183a7803bac9097afe4b94ea29beea5552546926bfe4249c58

          SHA512

          f5833ef930963dd07125e2ec81b86c0c8f6dfa18a28c2a4356df2097d7c6a960cd0182b39834c01341685d3245bc5bd70f5815f473af84c50d5d9ee5cfa93aca

        • C:\Users\Admin\AppData\Roaming\svchost.exe

          Filesize

          2.7MB

          MD5

          028d8a0f2eefdc87bcfde1457470789c

          SHA1

          a9f41548d827728e44cb0296b05ae23295698c46

          SHA256

          a80908bcd96a8df6070eb9a9c83739c8d95c34d7d81b890bacda91bb05c53267

          SHA512

          931b9ddeba173931968f80d144a3fd851236744c12212a6e723c88ffd7c720b7ec2538b655fe680a80c66d65a3ca541bcbbf3abfd1e353eef0dfb2fa3d9594f5

        • C:\Users\Admin\AppData\Roaming\svchost.exe

          Filesize

          2.7MB

          MD5

          028d8a0f2eefdc87bcfde1457470789c

          SHA1

          a9f41548d827728e44cb0296b05ae23295698c46

          SHA256

          a80908bcd96a8df6070eb9a9c83739c8d95c34d7d81b890bacda91bb05c53267

          SHA512

          931b9ddeba173931968f80d144a3fd851236744c12212a6e723c88ffd7c720b7ec2538b655fe680a80c66d65a3ca541bcbbf3abfd1e353eef0dfb2fa3d9594f5

        • C:\Users\Admin\Documents\DisconnectRestore.dotx

          Filesize

          1B

          MD5

          d1457b72c3fb323a2671125aef3eab5d

          SHA1

          5bab61eb53176449e25c2c82f172b82cb13ffb9d

          SHA256

          8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

          SHA512

          ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

        • memory/816-54-0x0000000000E60000-0x000000000111C000-memory.dmp

          Filesize

          2.7MB

        • memory/816-61-0x000000001AD60000-0x000000001ADE0000-memory.dmp

          Filesize

          512KB

        • memory/1128-60-0x0000000000A10000-0x0000000000CCC000-memory.dmp

          Filesize

          2.7MB

        • memory/1128-62-0x000000001B180000-0x000000001B200000-memory.dmp

          Filesize

          512KB

        • memory/1128-1025-0x000000001B180000-0x000000001B200000-memory.dmp

          Filesize

          512KB