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Overview

overview

10

Static

static

Chaos Rans...v4.exe

windows7_x64

10

Chaos Rans...v4.exe

windows10_x64

1

Resubmissions

10/10/2021, 08:37

211010-kh77dsffh5 10

10/10/2021, 08:28

211010-kdbbvsfgck 10

Analysis

  • max time kernel
    126s
  • max time network
    94s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    10/10/2021, 08:37

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General

  • Target

    Chaos Ransomware Builder v4.exe

  • Size

    550KB

  • MD5

    8b855e56e41a6e10d28522a20c1e0341

  • SHA1

    17ea75272cfe3749c6727388fd444d2c970f9d01

  • SHA256

    f2665f89ba53abd3deb81988c0d5194992214053e77fc89b98b64a31a7504d77

  • SHA512

    eefab442b9c1be379e00c6a7de9d6d7d327ad8fd52d62a5744e104f6caa44f7147a8e74f340870f9c017980a3d8a5a86a05f76434539c01270c442a66b2af908

Score
10/10
evasionransomwarespywarestealer

Malware Config

Extracted

Path

C:\Users\Admin\Desktop\read_it.txt

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
Wallets

bc1qlnzcep4l4ac0ttdrq7awxev9ehu465f2vpt9x0

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
    ransomwareevasion
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

    ransomware
  • Executes dropped EXE 2 IoCs
  • Modifies extensions of user files 5 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Drops startup file 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Drops desktop.ini file(s) 33 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

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

    ransomware
  • Modifies registry class 45 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 51 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Chaos Ransomware Builder v4.exe
    "C:\Users\Admin\AppData\Local\Temp\Chaos Ransomware Builder v4.exe"
    1⤵
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1680
    • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\bd0mxubm\bd0mxubm.cmdline"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1748
      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
        C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESF779.tmp" "c:\Users\Admin\Desktop\CSC23C098CE257C49CE8058BC3BF995A716.TMP"
        3⤵
          PID:1920
    • C:\Users\Admin\AppData\Local\Temp\Chaos Ransomware Builder v4.exe
      "C:\Users\Admin\AppData\Local\Temp\Chaos Ransomware Builder v4.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1524
    • C:\Users\Admin\AppData\Local\Temp\Chaos Ransomware Builder v4.exe
      "C:\Users\Admin\AppData\Local\Temp\Chaos Ransomware Builder v4.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1072
    • C:\Users\Admin\Desktop\xxxxxx.exe
      "C:\Users\Admin\Desktop\xxxxxx.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1596
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        2⤵
        • Executes dropped EXE
        • Modifies extensions of user files
        • Drops startup file
        • Drops desktop.ini file(s)
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:820
        • 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:1436
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            4⤵
            • Interacts with shadow copies
            PID:1304
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic shadowcopy delete
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1620
        • 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:928
          • C:\Windows\system32\bcdedit.exe
            bcdedit /set {default} bootstatuspolicy ignoreallfailures
            4⤵
            • Modifies boot configuration data using bcdedit
            PID:1780
          • C:\Windows\system32\bcdedit.exe
            bcdedit /set {default} recoveryenabled no
            4⤵
            • Modifies boot configuration data using bcdedit
            PID:1072
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1456
          • C:\Windows\system32\wbadmin.exe
            wbadmin delete catalog -quiet
            4⤵
            • Deletes backup catalog
            PID:564
        • 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:1736
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:932
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1748
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:108
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
          PID:204

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/564-99-0x000007FEFB631000-0x000007FEFB633000-memory.dmp

          Filesize

          8KB

          Download

        • memory/820-88-0x00000000008D0000-0x00000000008D1000-memory.dmp

          Filesize

          4KB

          Download

        • memory/820-90-0x000000001AC20000-0x000000001AC22000-memory.dmp

          Filesize

          8KB

          Download

        • memory/1072-68-0x000000001B2E0000-0x000000001B2E2000-memory.dmp

          Filesize

          8KB

          Download

        • memory/1072-70-0x000000001B2E6000-0x000000001B305000-memory.dmp

          Filesize

          124KB

          Download

        • memory/1524-65-0x0000000000BA0000-0x0000000000BA2000-memory.dmp

          Filesize

          8KB

          Download

        • memory/1524-69-0x0000000000BA6000-0x0000000000BC5000-memory.dmp

          Filesize

          124KB

          Download

        • memory/1596-83-0x0000000000D10000-0x0000000000D11000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1680-74-0x000000001EF40000-0x000000001EF41000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1680-73-0x000000001B1E6000-0x000000001B1E7000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1680-72-0x000000001B1E5000-0x000000001B1E6000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1680-71-0x000000001B1C6000-0x000000001B1E5000-memory.dmp

          Filesize

          124KB

          Download

        • memory/1680-60-0x0000000000FA0000-0x0000000000FA1000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1680-62-0x000000001B1C0000-0x000000001B1C2000-memory.dmp

          Filesize

          8KB

          Download