Analysis

  • max time kernel
    151s
  • max time network
    170s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    03-07-2022 04:45

General

  • Target

    3cf3bcb7c5cc493852122e94cd38f60ec6bd639856861f9c6d02097674876c2d.exe

  • Size

    352KB

  • MD5

    761b5210153ca201ad516c19b4790bb5

  • SHA1

    7d332ee352d4ce0c63d072ddc4d428c41a3641da

  • SHA256

    3cf3bcb7c5cc493852122e94cd38f60ec6bd639856861f9c6d02097674876c2d

  • SHA512

    033ad8cac6b36b18aac4bb8d5630475a7b2ca2f595d37729c1fcb30f76bdcc9b722c1b157d315926753d9d02d95c8cc2b11ac8e50d0415e99722c91a3788af88

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-2277218442-1199762539-2004043321-1000\Recovery+xckit.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 RSA-4096. More information about the encryption keys using RSA-4096 can be found here: http://en.wikipedia.org/wiki/RSA_(cryptosystem) How did this happen ? !!! Specially for your PC was generated personal RSA-4096 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://tt54rfdjhb34rfbnknaerg.milerteddy.com/54C2FD5D13D3A2B7 2. http://kkd47eh4hdjshb5t.angortra.at/54C2FD5D13D3A2B7 3. http://ytrest84y5i456hghadefdsd.pontogrot.com/54C2FD5D13D3A2B7 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/54C2FD5D13D3A2B7 4. Follow the instructions on the site. ---------------- IMPORTANT INFORMATION------------------------ *-*-* Your personal pages: http://tt54rfdjhb34rfbnknaerg.milerteddy.com/54C2FD5D13D3A2B7 http://kkd47eh4hdjshb5t.angortra.at/54C2FD5D13D3A2B7 http://ytrest84y5i456hghadefdsd.pontogrot.com/54C2FD5D13D3A2B7 *-*-* Your personal page Tor-Browser: xlowfznrg4wf7dli.ONION/54C2FD5D13D3A2B7
URLs

http://tt54rfdjhb34rfbnknaerg.milerteddy.com/54C2FD5D13D3A2B7

http://kkd47eh4hdjshb5t.angortra.at/54C2FD5D13D3A2B7

http://ytrest84y5i456hghadefdsd.pontogrot.com/54C2FD5D13D3A2B7

http://xlowfznrg4wf7dli.ONION/54C2FD5D13D3A2B7

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 1 IoCs
  • Deletes itself 1 IoCs
  • Adds Run key to start application 2 TTPs 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.

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 22 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3cf3bcb7c5cc493852122e94cd38f60ec6bd639856861f9c6d02097674876c2d.exe
    "C:\Users\Admin\AppData\Local\Temp\3cf3bcb7c5cc493852122e94cd38f60ec6bd639856861f9c6d02097674876c2d.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1816
    • C:\Windows\atxxinnvfeip.exe
      C:\Windows\atxxinnvfeip.exe
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops file in Program Files directory
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:1748
      • C:\Windows\System32\wbem\WMIC.exe
        "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete /noin teractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:804
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c DEL C:\Users\Admin\AppData\Local\Temp\3CF3BC~1.EXE
      2⤵
      • Deletes itself
      PID:1752

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Windows\atxxinnvfeip.exe

    Filesize

    352KB

    MD5

    761b5210153ca201ad516c19b4790bb5

    SHA1

    7d332ee352d4ce0c63d072ddc4d428c41a3641da

    SHA256

    3cf3bcb7c5cc493852122e94cd38f60ec6bd639856861f9c6d02097674876c2d

    SHA512

    033ad8cac6b36b18aac4bb8d5630475a7b2ca2f595d37729c1fcb30f76bdcc9b722c1b157d315926753d9d02d95c8cc2b11ac8e50d0415e99722c91a3788af88

  • C:\Windows\atxxinnvfeip.exe

    Filesize

    352KB

    MD5

    761b5210153ca201ad516c19b4790bb5

    SHA1

    7d332ee352d4ce0c63d072ddc4d428c41a3641da

    SHA256

    3cf3bcb7c5cc493852122e94cd38f60ec6bd639856861f9c6d02097674876c2d

    SHA512

    033ad8cac6b36b18aac4bb8d5630475a7b2ca2f595d37729c1fcb30f76bdcc9b722c1b157d315926753d9d02d95c8cc2b11ac8e50d0415e99722c91a3788af88

  • memory/804-66-0x0000000000000000-mapping.dmp

  • memory/1748-58-0x0000000000000000-mapping.dmp

  • memory/1748-61-0x0000000000400000-0x00000000004AF000-memory.dmp

    Filesize

    700KB

  • memory/1748-65-0x0000000000400000-0x00000000004AF000-memory.dmp

    Filesize

    700KB

  • memory/1752-62-0x0000000000000000-mapping.dmp

  • memory/1816-54-0x0000000075E51000-0x0000000075E53000-memory.dmp

    Filesize

    8KB

  • memory/1816-55-0x00000000005B0000-0x00000000005DE000-memory.dmp

    Filesize

    184KB

  • memory/1816-56-0x0000000000400000-0x00000000004AF000-memory.dmp

    Filesize

    700KB

  • memory/1816-57-0x0000000000400000-0x00000000004AF000-memory.dmp

    Filesize

    700KB

  • memory/1816-63-0x0000000000400000-0x00000000004AF000-memory.dmp

    Filesize

    700KB