Indiana University data exposure - 146,000 student SSNs - http://bit.ly/1bMlwkO

Ongoing NTP Amplification Attacks

Published: 2014-02-26
Last Updated: 2014-02-26 19:11:01 UTC
by Russ McRee (Version: 1)
8 comment(s)

Brett, who alerted us earlier this month regarding the mass exploit against Linksys devices has surfaced a current issue he's facing with ongoing NTP amplification attacks. A good US-CERT summary of the attack is here: https://www.us-cert.gov/ncas/alerts/TA14-013A. Brett indicates that:

"We are seeing massive attacks on our NTP servers, attempting to exploit the traffic amplification vulnerability reported last month. Our IPs are being probed by an address in the Netherlands, and a couple of them -- at which unpatched servers were discovered -- are being hit with about 3 million spoofed packets per hour. (We've since patched and firewalled the vulnerable servers, but the packets keep coming.) The spoofed packets are crafted so that they appear to be originating mostly from port 53 and 80, but occasionally have other port numbers such as 3074 (XBox) and 6667 (IRC). This is a very serious attack for us, and I'd appreciate some help in alerting folks to it."

He also sent along a 8 second packet capture that I've visualized as seen below.

NTP Amplification Attack

According to Brett, folks receiving similar traffic will see numerous "monitor" queries from spoofed source addresses and ports. His ISP is receiving roughly 3 million of these packets every hour, aimed at 3 IP addresses that belonged to FreeBSD servers that were vulnerable in their default configurations, servers that have now been patched and firewalled. He reminds us that even when The FreeBSD Project's patch has been applied, a vulnerable server will continue to respond to the queries with an equal number of rejection packets. While the patch eliminates the traffic amplification, the traffic is still echoed and its origin is further obscured.
Brett's ISP is are also seeing probes of their IPs looking for additional vulnerable servers originating from IP address 93.174.95.119 (NL), "which may be a server controlled by the person(s) behind the attack. The probes stand out because they are reported by tcpdump as being NTPv2, while most of the other traffic is NTPv3 or NTPv4. Level3 was apparently having congestion problems yesterday and today, and this may be why."

If readers are seeing similar traffic, please provide details in comments here.


 

 

8 comment(s)
ISC StormCast for Wednesday, February 26th 2014 http://isc.sans.edu/podcastdetail.html?id=3869

Comments

What's this all about ..?
password reveal .
<a hreaf="https://technolytical.com/">the social network</a> is described as follows because they respect your privacy and keep your data secure:

<a hreaf="https://technolytical.com/">the social network</a> is described as follows because they respect your privacy and keep your data secure. The social networks are not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go.

<a hreaf="https://technolytical.com/">the social network</a> is not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go. The social networks only collect the minimum amount of information required for the service that they provide. Your personal information is kept private, and is never shared with other companies without your permission
https://thehomestore.com.pk/
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> public bathroom near me</a>
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> nearest public toilet to me</a>
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> public bathroom near me</a>
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> public bathroom near me</a>
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> nearest public toilet to me</a>
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> public bathroom near me</a>
https://defineprogramming.com/
https://defineprogramming.com/
Enter comment here... a fake TeamViewer page, and that page led to a different type of malware. This week's infection involved a downloaded JavaScript (.js) file that led to Microsoft Installer packages (.msi files) containing other script that used free or open source programs.
distribute malware. Even if the URL listed on the ad shows a legitimate website, subsequent ad traffic can easily lead to a fake page. Different types of malware are distributed in this manner. I've seen IcedID (Bokbot), Gozi/ISFB, and various information stealers distributed through fake software websites that were provided through Google ad traffic. I submitted malicious files from this example to VirusTotal and found a low rate of detection, with some files not showing as malware at all. Additionally, domains associated with this infection frequently change. That might make it hard to detect.
https://clickercounter.org/
Enter corthrthmment here...

Diary Archives