Most crypto malware ransomware is typically programmed to automatically remove itself
...the malicious files responsible for the infection...after the encrypting is done since they are no longer needed. The encrypted files do not contain malicious code so they are safe. Unfortunately, most victims do not realize they have been infected until the ransomware displays the ransom note and the files have already been encrypted. In some cases there may be no ransom note and discovery only occurs at a later time when attempting to open an encrypted file. As such, they don't know how long the malware was on the system before being alerted or if other malware was installed along with the ransomware. If other malware was involved it could still be present so be sure to perform full scans with your anti-virus.
If your antivirus did not detect and remove anything, additional scans should be performed with other security programs like Malwarebytes Anti-Malware
and Emsisoft Anti-Malware
. You can also supplement your anti-virus or get a second opinion by performing an Online Virus Scan
is one of the more effective online scanners.
A repository of all current knowledge regarding CTB-Locker
(Critroni, Onion) is provided by Grinler
(aka Lawrence Abrams), in this topic: CTB-Locker and Critroni Ransomware Information Guide and FAQ
Unfortunately, there is no known way to decrypt files encrypted by CTB-Locker without paying the ransom.
There is an ongoing discussion in this topic where you can ask questions and seek further assistance. Other victims have been directed there to share information, experiences and suggestions.
When or if a solution is found, that information will be provided in the above support topic and you will receive notification if subscribed to it. In addition, a news article most likely will be posted on the BleepingComputer front page
Rather than have everyone with individual topics, it would be best (and more manageable for staff) if you posted any more questions, comments or requests for assistance in the above support topic discussion...it includes experiences by experts, a variety of IT consultants, end users and company reps who have been affected by ransomware infections. To avoid unnecessary confusion, this topic is closed.
The BC Staff