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iktguub file name extension / cyclized.zip - a variant of Win32/Kryptik.CVRX

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#1 shajuthomas


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Posted 25 January 2015 - 05:56 AM



An email is received with the attachment cyclized.zip; after opening this file all the files (word, excel, jpg, pdf) extensions were renamed to .iktguub at the end of original file name extension (eg. test.doc.iktguub).

Even after renaming the file to its original name; the file is not opening and a message says the file type is not supported or corrupted.

The entire system is affected except the .pst outlook files.

Antimalware, spybot, eset, Win32/Dorkbot, Microsoft Safety Scanner, Malicious Software Removal Tool ---all tools used but still the files are unable to open.


Word files are opening with a non-readable format. (extension renamed files are uploaded as the .iktguub extensions are not supported while uploading to this site)


Pls help

Edited by Queen-Evie, 25 January 2015 - 10:50 AM.
moved from Introductions to the appropriated forum

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#2 quietman7


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Posted 25 January 2015 - 02:08 PM

The newest variants of CTB Locker (Critroni) ransomware typically encrypt all data files and rename them as a file with a 6-7 length extension with random characters. A repository of all current knowledge regarding this infection is provided by Grinler (aka Lawrence Abrams), in this tutorial: CTB Locker and Critroni Ransomware Information Guide and FAQ

More information in these articles:Compounding matters, the newer CTB-Locker infection has been seen in combination with KEYHolder or Torrent Locker ransomware. Unfortunately, there is still no known method of decrypting your files without paying the ransom and with dual infections, that means paying both ransoms.

There is also an ongoing discussion in this topic: CTB Locker or DecryptAllFiles.txt Encrypting Ransomware Support & Discussion. Rather than have everyone start individual topics, it would be best (and more manageable for staff) if you posted any questions, comments or requests for assistance in that topic discussion.

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