Resubmissions

04-12-2024 22:48

241204-2q8lka1mam 10

04-12-2024 22:47

241204-2qx5ts1lhk 10

04-12-2024 22:43

241204-2nbtta1kfr 10

04-12-2024 19:35

241204-yayvmstjbk 10

04-12-2024 19:22

241204-x3b1xaxjf1 10

Analysis

  • max time kernel
    20s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04-12-2024 19:35

General

  • Target

    wertg.exe

  • Size

    652KB

  • MD5

    59db985c17a4ab06d3a0fbbb39ac045e

  • SHA1

    2622da604c4be6f2b8ad06cb2fa55d412ba53ece

  • SHA256

    9a065bd64cf7f9f4d1385bfd9df86325e03f8dd64d0a3af56cfd05a7b28c3247

  • SHA512

    8a0a2bb31c37ea27aeaa5f9b1e5f5ce3a42cecca8bdddb00b622bb722c4d7a2e36442b7c628d17629974676278aa0703e1088984599cf216eb2ff6e6a2f995a4

  • SSDEEP

    12288:n4/yrAlyQGlqrLFB8vT+RNinZ12sVNRgznu+Jbb0LrYsFPV0ZSYWaBfF+Nd5zKF:nMM4qskaNxm

Malware Config

Extracted

Path

C:\ProgramData\Adobe\Updater6\read_it.txt

Ransom Note
Don't worry, you can return all your files! All your files like documents, photos, databases and other important are encrypted What guarantees do we give to you? You can send an encrypted file and we decrypt it for free. You must follow these steps To decrypt your files : 1) Write on our e-mail :[email protected] ( In case of no answer in 24 hours check your spam folder or write us to this e-mail: [email protected]) 2) Obtain 500 USD worth of Bitcoin (You have to pay for decryption in Bitcoins. After payment we will send you the tool that will decrypt all your files.)

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Chaos family
  • Deletes shadow copies 3 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
  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 3 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).

  • Interacts with shadow copies 3 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 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 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\wertg.exe
    "C:\Users\Admin\AppData\Local\Temp\wertg.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2616
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • 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:2028
      • 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:2760
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2656
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2700
      • 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:1480
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:896
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2600
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1668
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1680
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:1340
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2912
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1660
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1712
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1400

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        601B

        MD5

        901bd8edab06d026fa09bdd47b02f5ad

        SHA1

        ecd6ebf92941094bafd479d3b88afc8733a53aab

        SHA256

        c21b50fb70d2afdb75ea0f194e8ccc35c62e9e229b2fc3a53f672b33a4c1f629

        SHA512

        4d8d49182efead6eb4b5800a41abbf0ad85680330899fc987f79ece1b1422ca90b7834fd3fdb308165ba14537fe9faf3e5f1e23bdfcd0cb492f1f0859cb86ae7

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

        Filesize

        652KB

        MD5

        59db985c17a4ab06d3a0fbbb39ac045e

        SHA1

        2622da604c4be6f2b8ad06cb2fa55d412ba53ece

        SHA256

        9a065bd64cf7f9f4d1385bfd9df86325e03f8dd64d0a3af56cfd05a7b28c3247

        SHA512

        8a0a2bb31c37ea27aeaa5f9b1e5f5ce3a42cecca8bdddb00b622bb722c4d7a2e36442b7c628d17629974676278aa0703e1088984599cf216eb2ff6e6a2f995a4

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2028-9-0x0000000000070000-0x000000000011A000-memory.dmp

        Filesize

        680KB

      • memory/2028-11-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

        Filesize

        9.9MB

      • memory/2028-12-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

        Filesize

        9.9MB

      • memory/2028-1066-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

        Filesize

        9.9MB

      • memory/2616-0-0x000007FEF56A3000-0x000007FEF56A4000-memory.dmp

        Filesize

        4KB

      • memory/2616-1-0x0000000000D00000-0x0000000000DAA000-memory.dmp

        Filesize

        680KB

      • memory/2616-2-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

        Filesize

        9.9MB

      • memory/2616-3-0x000007FEF56A3000-0x000007FEF56A4000-memory.dmp

        Filesize

        4KB

      • memory/2616-10-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

        Filesize

        9.9MB