Jump to content


 


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.


Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.

Photo

My files were encrypted/corrupted


  • Please log in to reply
3 replies to this topic

#1 yiannisghikas

yiannisghikas

  • Members
  • 2 posts
  • OFFLINE
  •  
  • Local time:03:49 AM

Posted 30 April 2017 - 05:45 AM

The majority of my data files, docs, xls, jpeg were possibly enrypted by a virus. I didn't get a note i wasn't asked to pay. Png , stl , rhino3d backup files still work, the rest not. I can not identify the virus.

Any ideas? Thank you



BC AdBot (Login to Remove)

 


#2 quietman7

quietman7

    Bleepin' Janitor


  • Global Moderator
  • 52,076 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Virginia, USA
  • Local time:07:49 PM

Posted 30 April 2017 - 06:22 AM

Are there any obvious file extensions appended to or with your encrypted data files (i.e. several random hexadecimal characters, words or email addresses)? If so, is the extension the same for each encrypted file or is it different?

The best way to identify the different ransomwares is the ransom note (including it's name), samples of the encrypted files, the malware file itself, any obvious extensions appended to the encrypted files, samples of the encrypted files and information related to any email addresses used by the cyber-criminals to request payment.

You can submit samples of encrypted files and ransom notes to ID Ransomware for assistance with identification and confirmation. This is a service that helps identify what ransomware may have encrypted your files and then attempts to direct you to an appropriate support topic where you can seek further assistance. Uploading both encrypted files and ransom notes together provides a more positive match and helps to avoid false detections.

Samples of any encrypted files, ransom notes or suspicious executable's (installer, malicious files, attachments) that you suspect were involved in causing the infection can be submitted here (https://www.bleepingcomputer.com/submit-malware.php?channel=168) with a link to this topic. There is a "Link to topic where this file was requested" box under the Browse... button. Doing that will be helpful with analyzing and investigating by our crypto malware experts.
.
.
Windows Insider MVP 2017-2018
Microsoft MVP Reconnect 2016
Microsoft MVP Consumer Security 2007-2015 kO7xOZh.gif
Member of UNITE, Unified Network of Instructors and Trusted Eliminators

If I have been helpful & you'd like to consider a donation, click 38WxTfO.gif

#3 yiannisghikas

yiannisghikas
  • Topic Starter

  • Members
  • 2 posts
  • OFFLINE
  •  
  • Local time:03:49 AM

Posted 30 April 2017 - 08:08 AM

Are there any obvious file extensions appended to or with your encrypted data files (i.e. several random hexadecimal characters, words or email addresses)? If so, is the extension the same for each encrypted file or is it different?

The best way to identify the different ransomwares is the ransom note (including it's name), samples of the encrypted files, the malware file itself, any obvious extensions appended to the encrypted files, samples of the encrypted files and information related to any email addresses used by the cyber-criminals to request payment.

You can submit samples of encrypted files and ransom notes to ID Ransomware for assistance with identification and confirmation. This is a service that helps identify what ransomware may have encrypted your files and then attempts to direct you to an appropriate support topic where you can seek further assistance. Uploading both encrypted files and ransom notes together provides a more positive match and helps to avoid false detections.

Samples of any encrypted files, ransom notes or suspicious executable's (installer, malicious files, attachments) that you suspect were involved in causing the infection can be submitted here (https://www.bleepingcomputer.com/submit-malware.php?channel=168) with a link to this topic. There is a "Link to topic where this file was requested" box under the Browse... button. Doing that will be helpful with analyzing and investigating by our crypto malware experts.

No file extentions change, the file name is exactly the same as before.



#4 quietman7

quietman7

    Bleepin' Janitor


  • Global Moderator
  • 52,076 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Virginia, USA
  • Local time:07:49 PM

Posted 30 April 2017 - 08:27 AM

There are several ransomware infections that do not append an obvious extension to the end of encrypted filenames or add a known file pattern which helps to identify it. CryptoWall, CrypMic, DMA Locker, Microsoft Decryptor (CryptXXX), PClock, Spora, Cryptofag, TeslaCrypt v4.0, CryptoHost, MotoxLocker, KawaiiLocker, Hermes, LoveServer and Power Worm do not append or change file extensions.

Some ransomware variants (i.e. DMA Locker, TeslaCrypt, CrypMic) will add a unique hex pattern identifier in the header of every encrypted file so the ransomware can identify the file as one it encrypted. Spora-encrypted files utilize a 4 byte long Crc32 file marker. CryptoWall is identified by how the files are renamed. CryptoWall 3.0 and 4.0 encrypted files typically will have the same 16 byte header which is different for each victim. PClock and Cryptofag do not use a filemarker.

Based on current infection rates and statistics, the most common ransomware variant that does not change the extension or use a filemarker is PClock.

Unfortunately, newer PClock variants are not decryptable...there is no longer any way to provide decryption without paying the ransom. There is ongoing discussion in this topic where victims can post comments, ask questions and seek further assistance. Other victims have been directed there to share information, experiences and suggestions.
.
.
Windows Insider MVP 2017-2018
Microsoft MVP Reconnect 2016
Microsoft MVP Consumer Security 2007-2015 kO7xOZh.gif
Member of UNITE, Unified Network of Instructors and Trusted Eliminators

If I have been helpful & you'd like to consider a donation, click 38WxTfO.gif




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users