Analysis

  • max time kernel
    61s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/10/2022, 01:40

General

  • Target

    942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe

  • Size

    23KB

  • MD5

    ad64cd38dc59c90ca8cffc512cf4450b

  • SHA1

    b45af5d72ac60c552d1f3eed07508c4a6fbade5c

  • SHA256

    942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd

  • SHA512

    55eca87344e24848e004c5a5255e7275314f3f5ca2d588e9900779977dbac3231eaa7e61ae303cde2be24084ec7447aa84276d5b00abe15cd10f5438b0813be3

  • SSDEEP

    384:n3Mg/bqo2bKKzM76pYDKF+98cJ3+r91CjEZb56e9t:xqo2nzRpYDKN03+r9uEZbgen

Malware Config

Extracted

Path

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

    Uses wbadmin.exe to inhibit system recovery.

  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 4 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • 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.

  • Drops desktop.ini file(s) 33 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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.

  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 53 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe
    "C:\Users\Admin\AppData\Local\Temp\942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1940
    • C:\Users\Admin\AppData\Roaming\coincrypter.exe
      "C:\Users\Admin\AppData\Roaming\coincrypter.exe"
      2⤵
      • Executes dropped EXE
      • Modifies extensions of user files
      • Checks computer location settings
      • Drops startup file
      • Drops desktop.ini file(s)
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4956
      • 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:2324
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:5008
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:116
      • 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:4988
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3796
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3492
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3660
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:4092
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\bitdecrypter.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:1596
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3060
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3980
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:4336
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:1036

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

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

      Filesize

      964B

      MD5

      4217b8b83ce3c3f70029a056546f8fd0

      SHA1

      487cdb5733d073a0427418888e8f7070fe782a03

      SHA256

      7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121

      SHA512

      2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

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

      Filesize

      23KB

      MD5

      ad64cd38dc59c90ca8cffc512cf4450b

      SHA1

      b45af5d72ac60c552d1f3eed07508c4a6fbade5c

      SHA256

      942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd

      SHA512

      55eca87344e24848e004c5a5255e7275314f3f5ca2d588e9900779977dbac3231eaa7e61ae303cde2be24084ec7447aa84276d5b00abe15cd10f5438b0813be3

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

      Filesize

      23KB

      MD5

      ad64cd38dc59c90ca8cffc512cf4450b

      SHA1

      b45af5d72ac60c552d1f3eed07508c4a6fbade5c

      SHA256

      942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd

      SHA512

      55eca87344e24848e004c5a5255e7275314f3f5ca2d588e9900779977dbac3231eaa7e61ae303cde2be24084ec7447aa84276d5b00abe15cd10f5438b0813be3

    • memory/1940-133-0x00007FFAD9D50000-0x00007FFADA811000-memory.dmp

      Filesize

      10.8MB

    • memory/1940-137-0x00007FFAD9D50000-0x00007FFADA811000-memory.dmp

      Filesize

      10.8MB

    • memory/1940-132-0x0000000000A60000-0x0000000000A6C000-memory.dmp

      Filesize

      48KB

    • memory/4956-138-0x00007FFAD9D50000-0x00007FFADA811000-memory.dmp

      Filesize

      10.8MB

    • memory/4956-149-0x00007FFAD9D50000-0x00007FFADA811000-memory.dmp

      Filesize

      10.8MB