Resubmissions

13-07-2024 09:54

240713-lxcvgawdmn 10

13-07-2024 09:52

240713-lv46yawdkj 10

13-07-2024 09:46

240713-lrz3tayajc 10

Analysis

  • max time kernel
    1758s
  • max time network
    1151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-07-2024 09:54

General

  • Target

    3998d0e987accc2837c6bf87fdb2796d0170ae2a79383b78fd778531410e337f.exe

  • Size

    153KB

  • MD5

    4c19104c6df0817095be0846b1607de6

  • SHA1

    ae3bf7a043cb10e8b206261af6af1558fc3d518b

  • SHA256

    3998d0e987accc2837c6bf87fdb2796d0170ae2a79383b78fd778531410e337f

  • SHA512

    d1ac86c12068192fe1dafd16a6c73e1dbabf0be5ca8c59ba3eeb6290c6061a207c0f91b77f42b190d4f8ebdee4a33a7dc596c7883c451cb039c3c2a0f37e8e4c

  • SSDEEP

    3072:o3kkKmAr9iVE3E04sMsXVpBWwLJwvkywY2ZDja9eIBdvhGkJJ9QuxIMb68J5K:y8r9it04XYVBIkNYcaeUvkkD9QRMb6

Malware Config

Extracted

Path

C:\Users\Admin\Desktop\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 2 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
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Interacts with shadow copies 3 TTPs 1 IoCs

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

  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 47 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of WriteProcessMemory 20 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\3998d0e987accc2837c6bf87fdb2796d0170ae2a79383b78fd778531410e337f.exe
    "C:\Users\Admin\AppData\Local\Temp\3998d0e987accc2837c6bf87fdb2796d0170ae2a79383b78fd778531410e337f.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1984
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Sets desktop wallpaper using registry
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4836
      • 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:1404
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:428
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4748
      • 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:4780
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3456
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3660
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:820
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1348
      • 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:1680
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3604
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3712
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2536
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3256

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      153KB

      MD5

      4c19104c6df0817095be0846b1607de6

      SHA1

      ae3bf7a043cb10e8b206261af6af1558fc3d518b

      SHA256

      3998d0e987accc2837c6bf87fdb2796d0170ae2a79383b78fd778531410e337f

      SHA512

      d1ac86c12068192fe1dafd16a6c73e1dbabf0be5ca8c59ba3eeb6290c6061a207c0f91b77f42b190d4f8ebdee4a33a7dc596c7883c451cb039c3c2a0f37e8e4c

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

      Filesize

      962B

      MD5

      1a31305937bebce0ccfb0e6142831452

      SHA1

      74d6e8aed55286c66b2dd15cf16c5ee53056b1c9

      SHA256

      62d5d9737197180da1404755041db64f82667b9bb4ae6ff6619b252ab5cb1695

      SHA512

      67d2155954a133e395084a5fe38adbe923a99603ffffcf1981c942f4f87d1b914808a210c33c10e59eef06873d73de62e2ccaabccd88a8e1055e90a6985be3c5

    • memory/1984-0-0x00000000002E0000-0x000000000030C000-memory.dmp

      Filesize

      176KB

    • memory/1984-1-0x00007FF96C7C3000-0x00007FF96C7C5000-memory.dmp

      Filesize

      8KB

    • memory/4836-14-0x00007FF96C7C0000-0x00007FF96D281000-memory.dmp

      Filesize

      10.8MB

    • memory/4836-69-0x00007FF96C7C0000-0x00007FF96D281000-memory.dmp

      Filesize

      10.8MB