Category: News
The Truth About Ransomware: You’re On Your Own
What should enterprises do when faced with ransomware? The answer is, it depends.
S4 Incident Responder and Researcher Conference: Agenda
As a follow up to our previous post, the agenda for the S4 Incident Responder and Researcher Conference, being held at OpenDNS HQ on September 18th, 2014, is now finalized.
Training Sessions
| Time | Title | Presenter |
| 8:00 | Breakfast and coffee (first talk 9AM SHARP!) | n/a |
| 9:00 – 11:00 | Malware Analysis for Incident Responders | Lenny Zeltser, The SANS Institute |
| 11:00 – 13:00 | Using Bro* | Anthony Kasza, OpenDNS |
| 13:00 – 15:00 | Using Moloch | Scott Floyd, Salesforce |
| 15:00 – 17:00 | IR 2.0 : Elastic Search, Logstash, Kibana (ELK) | The folks at Elastic Search |
Note: Lunch will be provided and available during the Bro session.
Evening Talks
| Time | Title | Presenter |
| 17:00 – 17:20 | Measuring the IQ of your Threat Intelligence Feeds | Alex Pinto, MLSec Project |
| 17:30 – 17:50 | FastResponder: New Open Source weapon to detect and understand a large scale compromise | Sébastien Larinier, Guillaume Arcas, and Olivier Zheng, Sekoia |
| 18:00 – 18:20 | Threat intelligence for Incident Responders | Sam Liles, Cyberforensics Laboratory at Purdue |
| 18:30 – 18:50 | Building Your Own DFIR Sidekick | Scott J Roberts, GitHub |
| 19:00 – 19:20 | GRR and Rekall: State of the Union | Elizabeth Schweinsberg and Kristinn Gudjonsson, Google |
| 19:30 – 22:00 | Networking, drinks, and conversation | n/a |
S4 Incident Responder and Researcher Conference Details
Who: Incident Responders, Security Researchers, Security Analysts
What: S4 (San Francisco Security Series): Incident Responder and Researcher Conference
When: September 18, 2014 (registration starts at 8:30 AM. First training at 9:00AM)
Where: OpenDNS HQ, 135 Bluxome St., San Francisco, CA 94107
Price: Free
Food and Drinks: Provided
Free and reliable WiFi: Provided
Event Hashtag: #s4con
OpenDNS Twitter Account: twitter.com/OpenDNS
Please reserve soon as space is limited. Again, the registration link can be found here: https://irespond.eventbrite.com.
We look forward to seeing you!
The post S4 Incident Responder and Researcher Conference: Agenda appeared first on OpenDNS Security Labs.
Gameover ZeuS Switches From P2P to DGA
Though Operation Tovar succeeded in temporarily cutting communication between Gameover ZeuS (GoZeus) and its command and control infrastructure, it appears now that GoZeus has migrated from using peer-to-peer communications to domain generation algorithms (DGAs).
According to research by our friends over at Malcovery, a “new trojan based heavily on the GameOver Zeus binary…was distributed as the attachment to three spam email templates.” In the report, several domains were identified as being the destination of the infected malware’s communications. The most active of the DGAs was one that we at OpenDNS identified on the day it was registered – cfs50p1je5ljdfs3p7n17odtuw[dot]biz.
As you can see, the traffic to the domain starts off with a small number of queries (10) on Thursday, July 10 at around 15:00 UTC. A larger jump to 884 queries doesn’t happen until Friday, July 11 at around 6:00 UTC. At peak (on Friday, July 11th at 10:00 UTC) we see a spike of 10,042 queries for cfs50p1je5ljdfs3p7n17odtuw[dot]biz.
The domain in question is associated with a number of IP addresses (as seen below) and have a very low TTL.
Three of the IP addresses have also been identified by OpenDNS Labs over the past week as being malicious. All of the IP addresses associated with the domain are located within the Ukraine.
The name server (NS) associated with the domain is also highly suspicious. The IP range is associated with AS 3462 and is hosted in Taiwan (TW) – quite the distance from the hosting location in the Ukraine. The IP address is also associated with suspicious name servers for a number of Russian (.ru) servers. A quick scan of some of the other domains hosted by the IP shows a handful of DGAs and Russian (.ru, .su), Kazakhstan (.kz), and Indian (.in) ccTLDs.
One last nugget of intel is some of the scoring that OpenDNS assigns to the domain, its associated IPs, and related ASNs.
Hopefully this information has helped you better understand the methodologies employed by GoZeus users. Using OpenDNS Investigate, we were able to derive additional intelligence from our global DNS data and shed some additional light on the communication channels.
All OpenDNS users are already protected against the identified domains in the Malcovery report. Should you have any additional questions, please do not hesitate to reach out to us.
Additional Refernces:
- http://blog.malcovery.com/blog/breaking-gameover-zeus-returns
- krebsonsecurity.com/2014/07/crooks-seek-rivival-of-gameover-zeus-botnet/
- investigate.opendns.com
- http://garwarner.blogspot.com/2014/07/new-gameover-zeus-variant-uses-fastflux.html
The post Gameover ZeuS Switches From P2P to DGA appeared first on OpenDNS Security Labs.