Analysis

  • max time kernel
    158s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    12/07/2022, 07:52

General

  • Target

    4c1047afcf72657f290338efac15c4bb109735512edee5556f76307f975c4f68.exe

  • Size

    371KB

  • MD5

    3d1d21040e9d68cbf02e146ad0ad67eb

  • SHA1

    1ba5dc500339977ef248125ccc8f6f66f3cb0f6f

  • SHA256

    4c1047afcf72657f290338efac15c4bb109735512edee5556f76307f975c4f68

  • SHA512

    bb14db6c812f3acd1777c10ad6fea24b4a3b10975d7f8811355d42bc493bddc3c07aa9129b065b061fe021473c64dc7da940885ba9bd42d59d9b1feefbe86865

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-1081944012-3634099177-1681222835-1000\_RECoVERY_+joort.txt

Family

teslacrypt

Ransom Note
NOT YOUR LANGUAGE? USE https://translate.google.com What happened to your files ? All of your files were protected by a strong encryption with AES More information about the encryption keys using AES can be found here: http://en.wikipedia.org/wiki/AES How did this happen ? !!! Specially for your PC was generated personal AES KEY, both public and private. !!! ALL YOUR FILES were encrypted with the public key, which has been transferred to your computer via the Internet. !!! Decrypting of your files is only possible with the help of the private key and decrypt program , which is on our Secret Server What do I do ? So, there are two ways you can choose: wait for a miracle and get your price doubled, or start obtaining BITCOIN NOW! , and restore your data easy way. If You have really valuable data, you better not waste your time, because there is no other way to get your files, except make a payment. For more specific instructions, please visit your personal home page, there are a few different addresses pointing to your page below: 1. http://yyre45dbvn2nhbefbmh.begumvelic.at/BF3830E53875E99 2. http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/BF3830E53875E99 3. http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/BF3830E53875E99 If for some reasons the addresses are not available, follow these steps: 1. Download and install tor-browser: http://www.torproject.org/projects/torbrowser.html.en 2. After a successful installation, run the browser 3. Type in the address bar: xlowfznrg4wf7dli.onion/BF3830E53875E99 4. Follow the instructions on the site. ---------------- IMPORTANT INFORMATION------------------------ *-*-* Your personal pages: http://yyre45dbvn2nhbefbmh.begumvelic.at/BF3830E53875E99 http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/BF3830E53875E99 http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/BF3830E53875E99 *-*-* Your personal page Tor-Browser: xlowfznrg4wf7dli.ONION/BF3830E53875E99
URLs

http://yyre45dbvn2nhbefbmh.begumvelic.at/BF3830E53875E99

http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/BF3830E53875E99

http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/BF3830E53875E99

http://xlowfznrg4wf7dli.ONION/BF3830E53875E99

Signatures

  • TeslaCrypt, AlphaCrypt

    Ransomware based on CryptoLocker. Shut down by the developers in 2016.

  • suricata: ET MALWARE Alphacrypt/TeslaCrypt Ransomware CnC Beacon

    suricata: ET MALWARE Alphacrypt/TeslaCrypt Ransomware CnC Beacon

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 64 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.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 47 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4c1047afcf72657f290338efac15c4bb109735512edee5556f76307f975c4f68.exe
    "C:\Users\Admin\AppData\Local\Temp\4c1047afcf72657f290338efac15c4bb109735512edee5556f76307f975c4f68.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4712
    • C:\Users\Admin\AppData\Local\Temp\4c1047afcf72657f290338efac15c4bb109735512edee5556f76307f975c4f68.exe
      "C:\Users\Admin\AppData\Local\Temp\4c1047afcf72657f290338efac15c4bb109735512edee5556f76307f975c4f68.exe"
      2⤵
      • Checks computer location settings
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4280
      • C:\Windows\syttidwakgvs.exe
        C:\Windows\syttidwakgvs.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4792
        • C:\Windows\syttidwakgvs.exe
          C:\Windows\syttidwakgvs.exe
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Adds Run key to start application
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          • System policy modification
          PID:404
          • C:\Windows\System32\wbem\WMIC.exe
            "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete /nointeractive
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1940
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c DEL C:\Users\Admin\AppData\Local\Temp\4C1047~1.EXE
        3⤵
          PID:1172
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4304

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Windows\syttidwakgvs.exe

      Filesize

      371KB

      MD5

      3d1d21040e9d68cbf02e146ad0ad67eb

      SHA1

      1ba5dc500339977ef248125ccc8f6f66f3cb0f6f

      SHA256

      4c1047afcf72657f290338efac15c4bb109735512edee5556f76307f975c4f68

      SHA512

      bb14db6c812f3acd1777c10ad6fea24b4a3b10975d7f8811355d42bc493bddc3c07aa9129b065b061fe021473c64dc7da940885ba9bd42d59d9b1feefbe86865

    • C:\Windows\syttidwakgvs.exe

      Filesize

      371KB

      MD5

      3d1d21040e9d68cbf02e146ad0ad67eb

      SHA1

      1ba5dc500339977ef248125ccc8f6f66f3cb0f6f

      SHA256

      4c1047afcf72657f290338efac15c4bb109735512edee5556f76307f975c4f68

      SHA512

      bb14db6c812f3acd1777c10ad6fea24b4a3b10975d7f8811355d42bc493bddc3c07aa9129b065b061fe021473c64dc7da940885ba9bd42d59d9b1feefbe86865

    • C:\Windows\syttidwakgvs.exe

      Filesize

      371KB

      MD5

      3d1d21040e9d68cbf02e146ad0ad67eb

      SHA1

      1ba5dc500339977ef248125ccc8f6f66f3cb0f6f

      SHA256

      4c1047afcf72657f290338efac15c4bb109735512edee5556f76307f975c4f68

      SHA512

      bb14db6c812f3acd1777c10ad6fea24b4a3b10975d7f8811355d42bc493bddc3c07aa9129b065b061fe021473c64dc7da940885ba9bd42d59d9b1feefbe86865

    • memory/404-149-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/404-147-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/404-146-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/404-145-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/4280-141-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/4280-132-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/4280-133-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/4280-136-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/4280-135-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/4712-130-0x0000000000720000-0x0000000000723000-memory.dmp

      Filesize

      12KB

    • memory/4712-134-0x0000000000720000-0x0000000000723000-memory.dmp

      Filesize

      12KB