Your browser is obsolete!

The page may not load correctly.

Free trial
Dr.Web for Android

Defend what you create

Other Resources

Close

Library
My library

+ Add to library

Contact us
24/7 Tech support

Send a message

Call us

+7 (495) 789-45-86

Forum
Profile

Back to news

Encryption ransomware threatens Linux users

November 6, 2015

Doctor Web warns users about new encryption ransomware targeting Linux operating systems. Judging from the directories in which the Trojan encrypts files, one can draw a conclusion that the main target of cybercriminals is website administrators whose machines have web servers deployed on. There have been some cases when virus makers exploited a vulnerability in the Magento platform to launch attacks on web servers. Doctor Web security researchers presume that at least tens of users have already fallen victim to this Trojan.

Once launched with administrator privileges, the Trojan dubbed Linux.Encoder.1 downloads files containing cybercriminals' demands and a file with the path to a public RSA key. After that, the malicious program starts as a daemon and deletes the original files. Subsequently, the RSA key is used to store AES keys which will be employed by the Trojan to encrypt files on the infected computer.

First, Linux.Encoder.1 encrypts all files in home directories and directories related to website administration. Then the Trojan recursively traverses the whole file system starting with the directory from which it is launched; next time, starting with a root directory (“/”). At that, the Trojan encrypts only files with specified extensions and only if a directory name starts with one of the strings indicated by cybercriminals.

Compromised files are appended by the malware with the .encrypted extension. Into every directory that contains encrypted files, the Trojan plants a file with a ransom demand—to have their files decrypted, the victim must pay a ransom in the Bitcoin electronic currency.

screen Linux.Encoder.1 #drweb

Doctor Web recommends users whose files have been encrypted to contact technical support providing detailed information on the incident and sending several samples of encrypted files. To decrypt files, it is very important that the user does not modify or delete them—otherwise, encrypted data may be permanently lost.

More about this Trojan

Tell us what you think

You will be awarded one Dr.Webling per comment. To ask Doctor Web’s site administration about a news item, enter @admin at the beginning of your comment. If your question is for the author of one of the comments, put @ before their names.


Other comments

The Russian developer of Dr.Web anti-viruses

Doctor Web has been developing anti-virus software since 1992

Dr.Web is trusted by users around the world in 200+ countries

The company has delivered an anti-virus as a service since 2007

24/7 tech support

© Doctor Web
2003 — 2017

Doctor Web is the Russian developer of Dr.Web anti-virus software. Dr.Web anti-virus software has been developed since 1992.

2-12А, 3rd street Yamskogo polya, Moscow, Russia, 125040