Threats have evolved to try and circumvent advances in analysis and detection. Every improvement by security vendors is met with a response from cybercriminals. Stuxnet, for example, paved the way for the other threat families to use the LNK vulnerability. Using Conficker/DOWNAD popularized the use of a domain generation algorithm (DGA). This is now used by other malware…
Read MoreFor a few months now, we have been actively monitoring a spambot named Stealrat, which primarily uses compromised websites and systems in its operations. We have continuously monitored its operations and identified about 195,000 thousand domains and IPs that have been compromised. The common denominator among these compromised sites is that they are running vulnerable…
Read MoreSpoofing – whether in the form of DNS, legitimate email notification, IP, address bar – is a common part of Web threats. We’ve seen its several incarnations in the past, but we recently found a technique known as header spoofing, which puts a different spin on evading detection. Header spoofing is when a URL appears…
Read MoreAdvances in spam detection meant that spam operators had to find ways to circumvent new technologies. For instance, Asprox made significant improvements in their spam and module architecture whereas Pushdo made use of decoy network traffic. Recently, we have discovered a new simple method used by a spam botnet we named StealRat. It consists of…
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