Perimeter

2/14/2018
10:55 AM
Connect Directly
Twitter
Twitter
RSS
E-Mail

Encrypted Attacks Continue to Dog Perimeter Defenses

Attacks using SSL to obfuscate malicious traffic finding fertile ground for growth.
2 of 8

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)

2 of 8
Comment  | 
Print  | 
Comments
Newest First  |  Oldest First  |  Threaded View
No SOPA
50%
50%
No SOPA,
User Rank: Ninja
7/13/2018 | 9:19:19 AM
Re: Encrypt All - See Nothing
This has been on the minds of InfoSec hackers for a few years now. Using packet lengths and times in behavioral analysis and fingerprinting the application with TLS metadata are two methods that can be successful as long as the software doing the traffic monitoring is sophisticated.

In "Identifying Encrypted Malware traffic with Contextual Flow Data" (Blake Anderson, David McGrew) for instance, the authors wrote a custom libcap-based tool to capture data features from live traffic. Some characteristics they identified as being attached to malware within the encrypted traffic included larger numbers of characters in the domain, much larger numbers of IPs per DNS request, and of course each we not found on Alexa top-N lists.

Not all features were as easily defined between traffic containing malware and not, but this paper and others since are a good sign all is not lost through the shift to HTTPs.
vuacauca
50%
50%
vuacauca,
User Rank: Apprentice
7/13/2018 | 5:55:30 AM
Due to comment spam on our site
This site has commenting guidelines and comments are reviewed by moderators before they are fully published to the web site.
hienly2017
50%
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. 
6 Security Trends for 2018/2019
Curtis Franklin Jr., Senior Editor at Dark Reading,  10/15/2018
6 Reasons Why Employees Violate Security Policies
Ericka Chickowski, Contributing Writer, Dark Reading,  10/16/2018
Getting Up to Speed with "Always-On SSL"
Tim Callan, Senior Fellow, Comodo CA,  10/18/2018
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Latest Comment: Too funny!
Current Issue
Flash Poll
The Risk Management Struggle
The Risk Management Struggle
The majority of organizations are struggling to implement a risk-based approach to security even though risk reduction has become the primary metric for measuring the effectiveness of enterprise security strategies. Read the report and get more details today!
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2018-10839
PUBLISHED: 2018-10-16
Qemu emulator <= 3.0.0 built with the NE2000 NIC emulation support is vulnerable to an integer overflow, which could lead to buffer overflow issue. It could occur when receiving packets over the network. A user inside guest could use this flaw to crash the Qemu process resulting in DoS.
CVE-2018-13399
PUBLISHED: 2018-10-16
The Microsoft Windows Installer for Atlassian Fisheye and Crucible before version 4.6.1 allows local attackers to escalate privileges because of weak permissions on the installation directory.
CVE-2018-18381
PUBLISHED: 2018-10-16
Z-BlogPHP 1.5.2.1935 (Zero) has a stored XSS Vulnerability in zb_system/function/c_system_admin.php via the Content-Type header during the uploading of image attachments.
CVE-2018-18382
PUBLISHED: 2018-10-16
Advanced HRM 1.6 allows Remote Code Execution via PHP code in a .php file to the user/update-user-avatar URI, which can be accessed through an "Update Profile" "Change Picture" (aka user/edit-profile) action.
CVE-2018-18374
PUBLISHED: 2018-10-16
XSS exists in the MetInfo 6.1.2 admin/index.php page via the anyid parameter.