Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

file extension

Posted on 2015-02-24
11
Medium Priority
?
245 Views
Last Modified: 2015-03-14
most of files like .docx , .pdf , .jpeg changed to .docx.lcmkfhc , .pdf.lcmkfhc , .jpeg.lcmkfhc etc .......and file doesnt open ...showing error corrupt or cant open
0
Comment
Question by:techp
  • 3
  • 2
  • 2
  • +3
11 Comments
 
LVL 13

Expert Comment

by:Santosh Gupta
ID: 40628659
did you tried to run antivirus and malware scan ?
also did you tried to remove .lcmkfhc from file extention and open ?
0
 
LVL 17

Expert Comment

by:OriNetworks
ID: 40628669
This appears to be a common question recently and points to virus that encrypts your files. Scan your comouter with up to date anyvirus software and also malwarebytes. You will most likely have to restore your files from a backup. If you dont have one you may be out of luck
0
 

Author Comment

by:techp
ID: 40628673
antivirus is updated , ........removed extension , copied to other pc , still cant open
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 
LVL 13

Expert Comment

by:Santosh Gupta
ID: 40628676
try as suggested by OriNetworks, surely system is infected. Which operating system and antivirus you are using.
0
 
LVL 5

Accepted Solution

by:
Alessandro Scafaria earned 750 total points
ID: 40628689
Probably your files are gone because they were victims of a Ransomware CryptoLocker o similar.

As OriNetworks pointed out, perform immediately a full scan of your system (I personally suggest a combination of Combofix and Malwarebytes) to clean your system.

Then take a look at this site too: https://www.decryptcryptolocker.com/

Probably with no luck, if you upload a crypted file of yours, you'll be able to decrypt it (never happened to me personally).....but a chance is a chance!!

Let me know.....
0
 

Author Comment

by:techp
ID: 40628902
no progress
0
 
LVL 63

Assisted Solution

by:☠ MASQ ☠
☠ MASQ ☠ earned 450 total points
ID: 40628930
Sorry - this is CBT-Locker - a Trojan (Not Cryptolocker and Cryptolocker tools won't recover this)  :(
See http:Q_28623027.html and multiple other threads on the topic
Your data files are being encrypted.
You can disinfect the system by booting to an AV utility such as the Kapersky rescue disk
http://support.kaspersky.com/viruses/rescuedisk
The trojan uses a random private encryption key and will offer you a chance to unencrypt your files at a price - hence the term Ransomware

Unless you have backups - or shadow copy or pay there's little chance of recovery.
It's worth disinfecting the machine to stop any further encryption but usually by the time this is noticed most of the permanent harm has been done.
0
 

Author Comment

by:techp
ID: 40633490
CBT locker , files encrypted , how to decrypt ?
0
 
LVL 63

Expert Comment

by:☠ MASQ ☠
ID: 40634024
You don't, please read the links.
0
 
LVL 65

Assisted Solution

by:btan
btan earned 300 total points
ID: 40636840
ransomware uses random extension after it encrypt your files, as all mentioned very poor chance to get back original file, at best from your backup or shadow copies (assuming you enabled that). it is strange that the ransomware did not prompt you for "ransom" or notify you on machine infected, likewise I believe it is CTB Locker (or known as Critroni in its early stage) too which appends random file extension  
Older versions of CTB-Locker would change the file extension to .CTBL or .CTB2, while newer ones are using a random extension such as .ftelhdd or .ztswgmc.
http://www.bleepingcomputer.com/virus-removal/ctb-locker-ransomware-information#ctbl

another sharing instance - http://deletemalware.blogspot.sg/2015/01/virus-renamed-and-encrypted-my-files.html
0

Featured Post

Automating Your MSP Business

The road to profitability.
Delivering superior services is key to ensuring customer satisfaction and the consequent long-term relationships that enable MSPs to lock in predictable, recurring revenue. What's the best way to deliver superior service? One word: automation.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In the absence of a fully-fledged GPO Management product like AGPM, the script in this article will provide you with a simple way to watch the domain (or a select OU) for GPOs changes and automatically take backups when policies are added, removed o…
Ransomware - Defeated! Client opened the wrong email and was attacked by Ransomware. I was able to use file recovery utilities to find shadow copies of the encrypted files and make a complete recovery.
This video Micro Tutorial explains how to clone a hard drive using a commercial software product for Windows systems called Casper from Future Systems Solutions (FSS). Cloning makes an exact, complete copy of one hard disk drive (HDD) onto another d…
Windows 8 comes with a dramatically different user interface known as Metro. Notably missing from the new interface is a Start button and Start Menu. Many users do not like it, much preferring the interface of earlier versions — Windows 7, Windows X…

916 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question