Perimeter

2/14/2018
10:55 AM
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Encrypted Attacks Continue to Dog Perimeter Defenses

Attacks using SSL to obfuscate malicious traffic finding fertile ground for growth.
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SSL-Encrypted Attacks on the Rise
The most recent research that offers a benchmark for the proportion of cybercriminal traffic that's encrypted comes by Ponemon Institute last year. That study found that about 41% of cyberattacks use SSL encryption to evade detection. More recent statistics elsewhere offer evidence that this proportion is likely growing.
This week, a 
study from Zscaler showed that SSL-encrypted attacks increased by 30% in the last six months. The firm says that it now blocks an average of 800,000 SSL-encrypted traffic transactions per day containing advanced threats, compared to 600,000 per day in the first half of 2017.

Image Source: Adobe Stock (DOC RABE Media)

SSL-Encrypted Attacks on the Rise

The most recent research that offers a benchmark for the proportion of cybercriminal traffic that's encrypted comes by Ponemon Institute last year. That study found that about 41% of cyberattacks use SSL encryption to evade detection. More recent statistics elsewhere offer evidence that this proportion is likely growing.

This week, a study from Zscaler showed that SSL-encrypted attacks increased by 30% in the last six months. The firm says that it now blocks an average of 800,000 SSL-encrypted traffic transactions per day containing advanced threats, compared to 600,000 per day in the first half of 2017.

Image Source: Adobe Stock (DOC RABE Media)

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hienly2017
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50%
hienly2017,
User Rank: Apprentice
2/26/2018 | 1:47:39 PM
Dog vs. Dodge
Should "Dodge" be used instead of "Dog" in the title of this article?
Michael Lines
50%
50%
Michael Lines,
User Rank: Author
2/15/2018 | 2:59:22 PM
Encrypt All - See Nothing
Encryption is both a blessing and a curse for security, and the increase use of encrypted channels by malware highlights the downsides. As more and more of the internal and external IP traffic shifts to encrypted 443, the ability of traditional IDS/IPS and other related tools to see the traffic and spot malicious payloads is erased. With the drive by Google and others to drive all websites to HTTPS by marking HTTP websites as unsafe, before long encrypted traffic will be the expected norm. 

With this evolution, the ability to look at where traffic is going, rather than what it contains will increasiningly be used as a means to spot malicous traffic. Whether it is connections to known C&C systems or outbound connections to foreign countries at 2am when the company has no business connections there, security tools that leverage DNS as part of behavioural traffic analysis are the next wave in the fight against those who want to infiltrate and compromize corporate systems. 
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