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Decoder is a ransomware that is relate to the GlobelImposter ransomware.

Payload

Transmission

Decoder is distributed through spam email messages, which include corrupted file attachments with macro scripts that download and install the Decoder Ransomware onto the victim's computer.

Infection

Once Decoder is installed, it will carry out an encryption ransomware attack that is typical of these threats. Threats like Decoder encrypt the victim's files to make them inaccessible, to justify the demand of a ransom from the victims so that they will acquire the decryption key that makes it possible to restore the affected files. Decoder targets the user-generated files, which include media files, images, and commonly used document formats. Examples of the file extensions that threats like Decoder target in their attacks include:

.3gp, .7z, .apk, .avi, .bmp, .cdr, .cer, .chm, .conf, .css, .csv, .dat, .db, .dbf, 
.djvu, .dbx, .docm, ,doc, .epub, .docx .fb2, .flv, .gif, .gz, .iso .ibooks,.jpeg, 
.jpg, .key, .mdb .md2, .mdf, .mht, .mobi .mhtm, .mkv, .mov, .mp3, .mp4, .mpg .mpeg, 
.pict, .pdf, .pps, .pkg, .png, .ppt .pptx, .ppsx, .psd, .rar, .rtf, .scr, .swf, 
.sav, .tiff, .tif, .tbl, .torrent, .txt, .vsd, .wmv, .xls, .xlsx, .xps, .xml, .ckp, 
.zip, .java, .py, .asm, .c, .cpp, .cs, .js, .php, .dacpac, .rbw, .rb, .mrg, .dcx, 
.db3, .sql, .sqlite3, .sqlite, .sqlitedb, .psd, .psp, .pdb, .dxf, .dwg, .drw, 
.casb, .ccp, .cal, .cmx, .cr2

The files encrypted by Decoder attack are marked with the file extension '.decoder,' which Decoder will add to the end of each affected file's name as part of its infection process. Decoder uses strong encryption algorithms that make it impossible to restore files encrypted by Decoder attack without the decryption key.

Decoder will encrypt its victim's files and deliver its ransom note in the form of a text file named 'Instructions.txt,' which is dropped on the infected computer's desktop. The text of Decoder ransom note reads:

Your personal ID
[RANDOM CHARACTERS]

All your files have been encrypted due to a security problem with your PC.
If you want to restore them, write us to the e-mail:decoder@keemail.me
Additional Mailing Address e-mail:decoder@expressmail.dk

How to obtain Bitcoins
** The easiest way to buy bitcoins is LocalBitcoins site. You have to register, click 'Buy bitcoins', and select 
the seller by payment method and price.
** hxxps://localbitcoins.com/buy_bitcoins
** Also you can find other places to buy Bitcoins and beginners guide here:
** hxxp://www.coindesk.com/information/how-can-i-buy-bitcoins/

Free decryption as guarantee
** Before paying you can send to us up to 1 files for free decryption. Please note that files must NOT contain 
valuable information and their total size must be less than 1Mb

Attention!
** Do not rename encrypted files.
** Do not try to decrypt your data using third party software, it may cause permanent data loss.
** Decryption of your files with the help of third parties may cause increased price (they add their fee to our) 
or you can become a victim of a scam.
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