Analysis

  • max time kernel
    119s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    07/09/2023, 16:30

General

  • Target

    JC_8901d677b018bce45fea80e396e5d02543f9c1bd0ee35e10269aba3a04ef9704.exe

  • Size

    109KB

  • MD5

    b3fe2335d478192118f666c1afb912e2

  • SHA1

    7589ddded869857c8aefe416f984e68a3c8da99b

  • SHA256

    8901d677b018bce45fea80e396e5d02543f9c1bd0ee35e10269aba3a04ef9704

  • SHA512

    542eba645bc8237470e9eb6bac47462c91737da183321a3a357295c1d05e0bd7a511073280cfc2f562042e7d10b0b907ac4cc852882e415ecf25556488160bb6

  • SSDEEP

    3072:9oPEplr9YpH1NJ3c2bJf+xN9iQhZhtghulJI2saIrnrsK:dr9YpHDbJENIQhZhGuU2saIjY

Malware Config

Extracted

Path

C:\Users\Admin\Documents\read_me.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: bc1qlnzcep4l4ac0ttdrq7awxev9ehu465f2vpt9x0

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 5 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
  • Renames multiple (213) 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.

  • 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) 34 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 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\JC_8901d677b018bce45fea80e396e5d02543f9c1bd0ee35e10269aba3a04ef9704.exe
    "C:\Users\Admin\AppData\Local\Temp\JC_8901d677b018bce45fea80e396e5d02543f9c1bd0ee35e10269aba3a04ef9704.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2968
    • 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:1684
      • 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:1724
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:1584
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2752
      • 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:2840
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2020
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2564
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2848
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:552
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_me.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:2320
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:856
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2884
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2008
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2672

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Roaming\read_me.txt

              Filesize

              964B

              MD5

              4217b8b83ce3c3f70029a056546f8fd0

              SHA1

              487cdb5733d073a0427418888e8f7070fe782a03

              SHA256

              7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121

              SHA512

              2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

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

              Filesize

              109KB

              MD5

              b3fe2335d478192118f666c1afb912e2

              SHA1

              7589ddded869857c8aefe416f984e68a3c8da99b

              SHA256

              8901d677b018bce45fea80e396e5d02543f9c1bd0ee35e10269aba3a04ef9704

              SHA512

              542eba645bc8237470e9eb6bac47462c91737da183321a3a357295c1d05e0bd7a511073280cfc2f562042e7d10b0b907ac4cc852882e415ecf25556488160bb6

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

              Filesize

              109KB

              MD5

              b3fe2335d478192118f666c1afb912e2

              SHA1

              7589ddded869857c8aefe416f984e68a3c8da99b

              SHA256

              8901d677b018bce45fea80e396e5d02543f9c1bd0ee35e10269aba3a04ef9704

              SHA512

              542eba645bc8237470e9eb6bac47462c91737da183321a3a357295c1d05e0bd7a511073280cfc2f562042e7d10b0b907ac4cc852882e415ecf25556488160bb6

            • C:\Users\Admin\Documents\read_me.txt

              Filesize

              964B

              MD5

              4217b8b83ce3c3f70029a056546f8fd0

              SHA1

              487cdb5733d073a0427418888e8f7070fe782a03

              SHA256

              7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121

              SHA512

              2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

            • memory/1684-7-0x0000000000980000-0x00000000009A2000-memory.dmp

              Filesize

              136KB

            • memory/1684-8-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

              Filesize

              9.9MB

            • memory/1684-10-0x0000000000650000-0x00000000006D0000-memory.dmp

              Filesize

              512KB

            • memory/1684-487-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

              Filesize

              9.9MB

            • memory/1684-488-0x0000000000650000-0x00000000006D0000-memory.dmp

              Filesize

              512KB

            • memory/2968-0-0x0000000000F70000-0x0000000000F92000-memory.dmp

              Filesize

              136KB

            • memory/2968-1-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

              Filesize

              9.9MB

            • memory/2968-473-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

              Filesize

              9.9MB