Analysis

  • max time kernel
    121s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    12/08/2024, 21:38

General

  • Target

    SolaraBootstrapper.exe

  • Size

    3.2MB

  • MD5

    a9f17939e061e0511410aaf77087b02d

  • SHA1

    554dc5ce2b0af194364833ea517a4089794fe97e

  • SHA256

    19b98f9d5364599c870fa967e544634a635c358b3ed7208d5fc563c95a26e7e2

  • SHA512

    4320694375b559ddcb6722d445e9509076f384271aa4445116f5b72a824a33df0aad1d29354b046964050a9676ce6e04e806046870064fe9b70512d99896adc4

  • SSDEEP

    24576:7u+wImf9OPXCQYpd0naDrvqjo44E9gzfyYVGSyF+ZjyFJX/oekGTP/JCF1eQ8uW:TO9OPXCYPD4mgRVIJ/vNQ8

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\read_it.txt

Family

chaos

Ransom Note
----> Chaos is multi language ransomware. Translate your note to any language <---- All of your files have been encrypted Your computer was infected with a ransomware virus. Your files have been encrypted and you won't be able to decrypt them without our help.What can I do to get my files back?You can buy our special decryption software, this software will allow you to recover all of your data and remove the ransomware from your computer.The price for the software is $1,500. Payment can be made in Bitcoin only. How do I pay, where do I get Bitcoin? Purchasing Bitcoin varies from country to country, you are best advised to do a quick google search yourself to find out how to buy Bitcoin. Many of our customers have reported these sites to be fast and reliable: Coinmama - hxxps://www.coinmama.com Bitpanda - hxxps://www.bitpanda.com Payment informationAmount: 0.1473766 BTC Bitcoin Address: message azrael_rd on discord for decrypt files

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (214) 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 3 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.

  • Drops desktop.ini file(s) 64 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 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 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 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\SolaraBootstrapper.exe
    "C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1688
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • 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:2472
      • 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:2784
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:1632
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2708
      • 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:2320
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2172
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1880
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1992
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1172
      • 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:1628
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2796
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1336
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:444
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2584

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\read_it.txt

              Filesize

              968B

              MD5

              a002759ee3761361f80907c02df36b32

              SHA1

              2c2e99235299b144ef465fa92c0026a37bc0c33c

              SHA256

              05d10453f26758546e434cd5269994f5d72e52560736eee3b3ef73d27fb941b7

              SHA512

              35f8770b3e0475be1b451443e56597d68b145020cdb32a85eac2d94b66327eeccbf95482bddf7bedcb280b1211aed3265cd75bbf3b7a7fb11ebba97168fc860e

            • C:\Users\Admin\AppData\Roaming\EnableDisconnect.xml

              Filesize

              1B

              MD5

              d1457b72c3fb323a2671125aef3eab5d

              SHA1

              5bab61eb53176449e25c2c82f172b82cb13ffb9d

              SHA256

              8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

              SHA512

              ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

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

              Filesize

              3.2MB

              MD5

              a9f17939e061e0511410aaf77087b02d

              SHA1

              554dc5ce2b0af194364833ea517a4089794fe97e

              SHA256

              19b98f9d5364599c870fa967e544634a635c358b3ed7208d5fc563c95a26e7e2

              SHA512

              4320694375b559ddcb6722d445e9509076f384271aa4445116f5b72a824a33df0aad1d29354b046964050a9676ce6e04e806046870064fe9b70512d99896adc4

            • memory/1688-0-0x000007FEF5413000-0x000007FEF5414000-memory.dmp

              Filesize

              4KB

            • memory/1688-1-0x00000000010F0000-0x0000000001426000-memory.dmp

              Filesize

              3.2MB

            • memory/2472-7-0x0000000000B20000-0x0000000000E56000-memory.dmp

              Filesize

              3.2MB

            • memory/2472-9-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

              Filesize

              9.9MB

            • memory/2472-81-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

              Filesize

              9.9MB

            • memory/2472-1057-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

              Filesize

              9.9MB