Overview

overview

10

Static

static

10

Chaos Rans...v4.exe

windows7-x64

10

Chaos Rans...v4.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    96s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/05/2024, 06:49

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General

  • Target
    Chaos Ransomware Builderv4.exe
  • Size 548KB
  • Sample240511-hlt3tsbf8v
  • SHA256 3246be7f25f8f4cd9ade8f0a8faf12847df126eecf65d7e8012f35ab45e73a40
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
chaosdefense_evasionevasionexecutionimpactransomwarespywarestealer

Malware Config

Extracted

Path

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

  • 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.

    ransomwarechaos
  • Chaos Ransomware 4 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • 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
  • 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 2 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) 34 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 2 TTPs 1 IoCs

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

    ransomware
  • Modifies registry class 61 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 37 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 24 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.

    persistence
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\Chaos Ransomware Builderv4.exe
    "C:\Users\Admin\AppData\Local\Temp\Chaos Ransomware Builderv4.exe"
    1⤵
    • Modifies registry class
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3008
    • 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\4jtjrmlz\4jtjrmlz.cmdline"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3444
      • 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\RESE2F8.tmp" "c:\Users\Admin\Downloads\CSCDD97E7E7B7DE445B9E8EA3FF2FFDAB.TMP"
        3⤵
          PID:3368
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:3792
      • C:\Users\Admin\Downloads\test.exe
        "C:\Users\Admin\Downloads\test.exe"
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4360
        • 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)
          • Modifies registry class
          • Suspicious behavior: AddClipboardFormatListener
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4560
          • 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:1228
            • C:\Windows\system32\vssadmin.exe
              vssadmin delete shadows /all /quiet
              4⤵
              • Interacts with shadow copies
              PID:4400
            • C:\Windows\System32\Wbem\WMIC.exe
              wmic shadowcopy delete
              4⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:4392
          • 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:2860
            • C:\Windows\system32\bcdedit.exe
              bcdedit /set {default} bootstatuspolicy ignoreallfailures
              4⤵
              • Modifies boot configuration data using bcdedit
              PID:4880
            • C:\Windows\system32\bcdedit.exe
              bcdedit /set {default} recoveryenabled no
              4⤵
              • Modifies boot configuration data using bcdedit
              PID:5048
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:1480
            • C:\Windows\system32\wbadmin.exe
              wbadmin delete catalog -quiet
              4⤵
              • Deletes backup catalog
              PID:1040
          • 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:4336
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:540
      • C:\Windows\system32\wbengine.exe
        "C:\Windows\system32\wbengine.exe"
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3764
      • C:\Windows\System32\vdsldr.exe
        C:\Windows\System32\vdsldr.exe -Embedding
        1⤵
          PID:2096
        • C:\Windows\System32\vds.exe
          C:\Windows\System32\vds.exe
          1⤵
          • Checks SCSI registry key(s)
          PID:1432
        • C:\Windows\system32\OpenWith.exe
          C:\Windows\system32\OpenWith.exe -Embedding
          1⤵
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          PID:4372
        • C:\Windows\system32\OpenWith.exe
          C:\Windows\system32\OpenWith.exe -Embedding
          1⤵
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          PID:4332
        • C:\Windows\system32\OpenWith.exe
          C:\Windows\system32\OpenWith.exe -Embedding
          1⤵
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          PID:4044

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              RESE2F8.tmp
              • Path C:\Users\Admin\AppData\Local\Temp\RESE2F8.tmp
              • Size 1KB
              • SHA256 1285a3f1603b7e4f5a3a428f3093e7c2f35b1e05434bc6a91d56d5098a84558d
              • MD5 SHA1 SHA512
              Submit Download

              read_it.txt
              • Path C:\Users\Admin\Documents\read_it.txt
              • Size 964B
              • SHA256 7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121
              • MD5 SHA1 SHA512
              Submit Download

              test.exe
              • Path C:\Users\Admin\Downloads\test.exe
              • Size 23KB
              • SHA256 8704bcd769164629f1ae99cf16f8573de5ddba77b9df57e2b4a2cd5963707228
              • MD5 SHA1 SHA512 SSDEEP
              Submit Download

              4jtjrmlz.0.cs
              • Path \??\c:\Users\Admin\AppData\Local\Temp\4jtjrmlz\4jtjrmlz.0.cs
              • Size 31KB
              • SHA256 03c4dd3c2e4e34572850c66c7dd1333f8002650d604d0c111dafc9a74a660f6c
              • MD5 SHA1 SHA512 SSDEEP
              Submit Download

              4jtjrmlz.cmdline
              • Path \??\c:\Users\Admin\AppData\Local\Temp\4jtjrmlz\4jtjrmlz.cmdline
              • Size 332B
              • SHA256 dbd6d5decef4c060e40a60264d84e3363ce32cb6ae5989ffabd412d0ccc20ff6
              • MD5 SHA1 SHA512
              Submit Download

              CSCDD97E7E7B7DE445B9E8EA3FF2FFDAB.TMP
              • Path \??\c:\Users\Admin\Downloads\CSCDD97E7E7B7DE445B9E8EA3FF2FFDAB.TMP
              • Size 1KB
              • SHA256 d9edfacf147f183b116c4ba680fe1087d13f04fa7dc92ca7e9bc9f2fdbca24b6
              • MD5 SHA1 SHA512
              Submit Download

              memory/3008-7-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp
              Download

              memory/3008-22-0x000000001BC20000-0x000000001BDC9000-memory.dmp
              Download

              memory/3008-8-0x000000001BC20000-0x000000001BDC9000-memory.dmp
              Download

              memory/3008-10-0x000000001BC20000-0x000000001BDC9000-memory.dmp
              Download

              memory/3008-11-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp
              Download

              memory/3008-12-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp
              Download

              memory/3008-13-0x000000001BC20000-0x000000001BDC9000-memory.dmp
              Download

              memory/3008-14-0x000000001BC20000-0x000000001BDC9000-memory.dmp
              Download

              memory/3008-15-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp
              Download

              memory/3008-16-0x000000001BC20000-0x000000001BDC9000-memory.dmp
              Download

              memory/3008-17-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp
              Download

              memory/3008-0-0x00007FFF7CB13000-0x00007FFF7CB15000-memory.dmp
              Download

              memory/3008-23-0x000000001BC20000-0x000000001BDC9000-memory.dmp
              Download

              memory/3008-6-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp
              Download

              memory/3008-5-0x000000001BC20000-0x000000001BDC9000-memory.dmp
              Download

              memory/3008-4-0x000000001BC20000-0x000000001BDC9000-memory.dmp
              Download

              memory/3008-3-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp
              Download

              memory/3008-2-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp
              Download

              memory/3008-1-0x0000000000D10000-0x0000000000D9E000-memory.dmp
              Download

              memory/3008-39-0x000000001BC20000-0x000000001BDC9000-memory.dmp
              Download

              memory/3008-53-0x000000001BC20000-0x000000001BDC9000-memory.dmp
              Download

              memory/3008-54-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp
              Download

              memory/4360-38-0x0000000000310000-0x000000000031C000-memory.dmp
              Download