Microsoft Identifies New Malware Dropping Sefnit Botnet

Plenty has been written about the Sefnit malware family and its favor with using Tor to mask communication, as well as the money it’s made for criminals via click-fraud schemes. Sefnit, however, has had a pair of accomplices that until recently were regarded as harmless programs by most security...

Click-Fraud Sefnit Variant Shuns Tor for SSH

Sefnit was the first malware family to shed light on the problem of botnets and other malicious code using the Tor anonymity network as a communication protocol. While others before and since have done the same, Sefnit made the biggest splash at the end of last summer when the botnet caused a 600...

Microsoft, Kaspersky Shed Light on Sefnit Tor Botnet

Alarm bells went off last August when spikes in Tor client downloads were traced to a large click-fraud and Bitcoin-mining botnet called Sefnit. The malware was using the popular anonymity network to communicate with hackers in order to transmit stolen data and receive additional commands. In...

Microsoft remotely deleted Tor-based 'Sefnit Botnet' from more than 2 Million Systems

In October 2013, Microsoft adopted a silent, offensive method to tackle infection due to a Tor-based botnet malware called 'Sefnit'. In an effort to takedown of the Sefnit botnet to protect windows users, Microsoft remotely removes the older versions of installed Tor Browser software and infectio...

Sefnit Click-Fraud Malware Related to Mevade Tor Botnet

A malware family, likely developed by the same authors who built a massive botnet recently discovered on the Tor network, has been revived with a stealthy new click-fraud scam. Microsoft reports a rash of new click-fraud activity linked to the Sefnit malware, which was thought dead and buried as ...

Tor Anonymizing network overload caused by Mevade Botnet

Recently, Tor Project Director - Roger Dingledine described a sudden increase in Tor users on the Tor Network after the events related to disclosure of the PRISM surveillance program, Since August 19, 2013, there has been an impressive growth in the number of Tor users. At first, No one knew who ...