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Story of the Cutwail/Pushdo hidden C&C server

25

Jun

2013

This is a loose sequel to the Cutwail botnet analysis blogpost published on the malwaremustdie.blogspot.com. In this blogpost I will primarily focus on the downloaded PE executable itself (SHA256: 5F8FCC9C56BF959041B28E97BFB5DB9659B20A6E6076CFBA8CB2D591184C9164) and the network traffic that it generates. I will also reveal a hidden C&C server.But first let’s quickly go through the things it does at […]

Category General Written by Avast! blog 0 Comments

Latest Pushdo Variants Challenge Antimalware Solution

25

Jun

2013

Command-and-control (C&C) server communication is essential for botnet creators to control zombie computers (or bots). To hide this from security researchers, they often use rootkits and other “tricks”. However, hiding the network traffic – specifically from monitoring outside an infected computer – is not an easy task, but is something that the botnet creators have […]

Category General Written by Security Intelligence 0 Comments

Malware Using Fake Certificate to Evade Detection

14

Jun

2013

Malware authors are always seeking new ways to hone their craft. As cybercriminals are facing a multitude of preventative technologies from Symantec and users are becoming more security conscious, it is becoming increasingly difficult for the bad guys to win.Recently, during research, we came across an oddly named sample, Word13.exe. Upon first glance, it appears to […]

Category General Written by Symantec Security Response Blog 0 Comments

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Story of the Cutwail/Pushdo hidden C&C server

Latest Pushdo Variants Challenge Antimalware Solution

Malware Using Fake Certificate to Evade Detection

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