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Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    02/04/2024, 03:41

General

  • Target

    230815-qwaqyaba29.exe

  • Size

    27KB

  • MD5

    f680f45e190c032931f189ab71caecbc

  • SHA1

    02b52470aabee1a8f2700d902e249bf19ec0d945

  • SHA256

    05efe778c9253dc647b2667b4c821426a427607d3676e1d03a7e02c5b1e7279c

  • SHA512

    5647471f0fb9c01f7dd1767fafac4e40409fefac241caa4f64d86e42b7705f623a1cc7be49388dda76144261a3a7d3c42dd04ef134983ef15de0c10ddaef3294

  • SSDEEP

    384:3tWZPzzxAm1vaohWAdZ71+kezxBSKrvylvOy5o91z1rxYlf82vi:O7zxAmphxdZgke26Aho9dre826

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Detects command variations typically used by ransomware 3 IoCs
  • Detects executables containing many references to VEEAM. Observed in ransomware 3 IoCs
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (179) files with added filename extension

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

  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Disables Task Manager via registry modification
  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

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

  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 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\230815-qwaqyaba29.exe
    "C:\Users\Admin\AppData\Local\Temp\230815-qwaqyaba29.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2696
    • C:\Users\Admin\AppData\Roaming\allahuakbar.exe
      "C:\Users\Admin\AppData\Roaming\allahuakbar.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops desktop.ini file(s)
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2692
      • 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:2744
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2556
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2832
      • 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:1488
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1404
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2468
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2480
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:820
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\how_to_decrypt.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:2452
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2664
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1856
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1600
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:360

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\ProgramData\Adobe\Updater6\how_to_decrypt.txt

        Filesize

        548B

        MD5

        86dd265b63202e1a43e0a13cacb15510

        SHA1

        c6f6dbd6423baf73333942ae3b8d5fec4da79be9

        SHA256

        65eb9a936236abc249335795b35e357fb807ae96977809acbdac45a6a79694b5

        SHA512

        d33885a468e279f98b2355f3748a5d5203af70e6276fd8bed0ebba5fb8ab1f6dfc19343d800d9d2bc63596984775f2bbe7b4d1c10fa05464b9568f1dc81cab20

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

        Filesize

        27KB

        MD5

        f680f45e190c032931f189ab71caecbc

        SHA1

        02b52470aabee1a8f2700d902e249bf19ec0d945

        SHA256

        05efe778c9253dc647b2667b4c821426a427607d3676e1d03a7e02c5b1e7279c

        SHA512

        5647471f0fb9c01f7dd1767fafac4e40409fefac241caa4f64d86e42b7705f623a1cc7be49388dda76144261a3a7d3c42dd04ef134983ef15de0c10ddaef3294

      • C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Notepad.lnk

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2692-8-0x0000000000B10000-0x0000000000B1E000-memory.dmp

        Filesize

        56KB

      • memory/2692-10-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2692-11-0x000000001AB80000-0x000000001AC00000-memory.dmp

        Filesize

        512KB

      • memory/2692-910-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2696-0-0x00000000011A0000-0x00000000011AE000-memory.dmp

        Filesize

        56KB

      • memory/2696-1-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2696-2-0x000000001AE60000-0x000000001AEE0000-memory.dmp

        Filesize

        512KB

      • memory/2696-9-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

        Filesize

        9.9MB