Ransomware Research

CryptoFortress

CryptoFortress was first discovered in March 2016 in enterprise cloud environments.

Name

CryptoFortress

 

First Seen

March 2016

Targeting

Behavior of CryptoFortress

CryptoFortress is known to target specific file types. Below are all known file types that CryptoFortress is known to infect.

In some cases, ransomware will update the modified date, when it encrypts files. CryptoFortress updates the last modified date of the file it targets.

Details

Characteristics of CryptoFortress

Suffixes

Some ransomware will change or append a suffix to the end of the file after they are encrypted, including changing the extension of a file. Here are some of the possible suffixes that CryptoFortress ransomware is known to change.

Suffixes

.frtrss

Ransomware Notes

Not all ransomware leaves a note. However, some ransomware leaves the infected party instructions on what the user should do to get rid of the ransomware, or satisfy the ransom. This often involves transferring money, often bitcoin or another cryptocurrency to a designated wallet.

Below are the type(s) of notes, content, and typical locations where Elastio has found ransom notes from CryptoFortress.

Type

File Name

Location

file

READ IF YOU WANT YOUR FILES BACK.html

EveryFolder

Executables

These are the names of the executables that contain the undetonated ransomware payload for CryptoFortress.

External Pages

Ransomware often links to external pages such as payment pages, telegram contacts, etc. Below are some of the URLs Elastio has found to be associated with CryptoFortress.

External Pages

  • http://h63rbx7gkd3gygag.onion.cab
  • http://h63rbx7gkd3gygag.onion.city
  • http://h63rbx7gkd3gygag.tor2web.org/buy.php
  • http://h63rbx7gkd3gygag.connect2tor.org/buy.php
  • http://h63rbx7gkd3gygag.door2tor.org/buy.php
  • http://h63rbx7gkd3gygag.onion.cab/buy.php
  • http://h63rbx7gkd3gygag.onion.city/buy.php

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