Cyren Security Blog

Port 25 blocking spurred ISP email relay zombies

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“This represents a new step in the evolution of spambots. Previously, these bots all tried to transmit directly from port 25, but with the advent of port 25 blocking by ISPs, this has become an obstacle. It was only a … Continue reading →

An anti-spam standard?

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From Security_Watchdog blog: “The Internet Engineering Task Force has granted preliminary approval to DomainKeys Identified Mail (DKIM). The platform promises to kill spam by preventing spoofing. DomainKeys attaches an encrypted digital signature unique to the sender to each email when … Continue reading →

Microsoft sues stock spamming John Doe

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Hoping to tackle the growing problem of pump-and-dump stock scams Microsoft has quietly filed lawsuits against at least three alleged perpetrators who it says used its MSN Hotmail networks to promote stocks. Pump-and-dump spam has not only taken up resources … Continue reading →

Americans are less bothered by spam

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The Pew Internet and American Life Project recently published the results of a survey about how American’s relate to spam. The overall conclusion is that “The volume of spam is growing in Americans’ personal and workplace email accounts, but email … Continue reading →

Marketing Malware

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We always knew that security can’t be left up to users, and now there is hard proof. Reuters just published the results of an (admittedly ridiculous) test in which a computer specialist named Didier Stevens offered free viruses on Google … Continue reading →

Symantec false positives cripple thousands of Chinese PCs

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Virus signature update mistakes critical Windows files for malware. “It’s a terrible day for lots of Chinese users (especially Enterprise Users) who use Norton products today,” CISRT said. “This issue has made a huge effection to Chinese people.” Other reports … Continue reading →