Analysis

  • max time kernel
    135s
  • max time network
    109s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-06-2024 11:26

General

  • Target

    2024-06-04_0fc06a200b5caee925f0daf120725106_wannacry.exe

  • Size

    565KB

  • MD5

    0fc06a200b5caee925f0daf120725106

  • SHA1

    9f186aa6bbbf50c0a430d9bd1b3276164fbbce42

  • SHA256

    1130f367f8ae3ce57756116751f902489ab746751f0a4fd3b6cc737f9c2afa7a

  • SHA512

    695deb0c5e5b27e84dc3a62b57e159b84b79be960c1116f45bb40ac7f13170ea38cddf4837a4fdd2c8eff12633cc895b4c839c749470284939ff48bde845c49b

  • SSDEEP

    12288:xO4cmFlknCorfeHFK+i0aN+Ef7vk757l4PD8wtIRKg2zs+1YZeYZr8axeAC3pM:xnIean/tEoP3S

Malware Config

Extracted

Path

C:\Users\Admin\Documents\# XRET #.txt

Ransom Note
%%% Xret Ransomware %%% >>> What happened? We encrypted and stolen all of your files. We use AES and ECC algorithms. Nobody can recover your files without our decryption service. >>> How to recover? We are not a politically motivated group and we want nothing more than money. If you pay, we will provide you with decryption software and destroy the stolen data. >>> What guarantees? You can send us an unimportant file less than 1 MG, We decrypt it as guarantee. If we do not send you the decryption software or delete stolen data, no one will pay us in future so we will keep our promise. >>> How to contact us? Our email address: [email protected] In case of no answer within 24 hours, contact to this Whatsapp: +56-997165537 Write &*&@! in the subject of the email. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>> XRET <<<<< >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>> Warnings! - Do not go to recovery companies, they are just middlemen who will make money off you and cheat you. They secretly negotiate with us, buy decryption software and will sell it to you many times more expensive or they will simply scam you. - Do not hesitate for a long time. The faster you pay, the lower the price. - Do not delete or modify encrypted files, it will lead to problems with decryption of files.

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.

  • Detects command variations typically used by ransomware 2 IoCs
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (219) 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.

  • 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 2 TTPs 1 IoCs

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

  • Modifies registry class 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\2024-06-04_0fc06a200b5caee925f0daf120725106_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-04_0fc06a200b5caee925f0daf120725106_wannacry.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3436
    • C:\Users\Admin\AppData\Roaming\XT.exe
      "C:\Users\Admin\AppData\Roaming\XT.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:3668
      • 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:4580
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2520
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4372
      • 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:4960
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:4768
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2412
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2628
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2004
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\# XRET #.txt
        3⤵
          PID:3008
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4400
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2536
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:3252
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
        • Checks SCSI registry key(s)
        PID:4976

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        565KB

        MD5

        0fc06a200b5caee925f0daf120725106

        SHA1

        9f186aa6bbbf50c0a430d9bd1b3276164fbbce42

        SHA256

        1130f367f8ae3ce57756116751f902489ab746751f0a4fd3b6cc737f9c2afa7a

        SHA512

        695deb0c5e5b27e84dc3a62b57e159b84b79be960c1116f45bb40ac7f13170ea38cddf4837a4fdd2c8eff12633cc895b4c839c749470284939ff48bde845c49b

      • C:\Users\Admin\Documents\# XRET #.txt

        Filesize

        1KB

        MD5

        1a3d8cf29404870290401a7e5e9be84d

        SHA1

        678c8c8a6bb38fc44870b91f6e787ce59efdc288

        SHA256

        5ea4a9b5158f234a511d8fa155e68a2f5333f91f89f54893334750840952b3a3

        SHA512

        2e34c2e81b7adaeac78edef60566d28a661590a4552cc5e357718c31737dcfeb5a72a4733acf9427bcdbe990ab6f2712283ac5b34d005d83b8305f1b98da7c82

      • memory/3436-0-0x00007FFF7CB13000-0x00007FFF7CB15000-memory.dmp

        Filesize

        8KB

      • memory/3436-1-0x0000000000150000-0x00000000001E4000-memory.dmp

        Filesize

        592KB

      • memory/3668-14-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp

        Filesize

        10.8MB

      • memory/3668-26-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp

        Filesize

        10.8MB

      • memory/3668-507-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp

        Filesize

        10.8MB