Orz.A Trojan (Jan 14, 2011)

SonicWALL UTM Research team received reports of a new Trojan spreading in the wild. Once on a system it appears to post potential sensitive information to a remote web server. In the background it installs a copy of the "Super Rabbit" system configuration software. The software is installed without user interaction or consent.

The Trojan makes DNS queries to the following hosts:

download.youbak.com
tj.pctutu.net
srtj.pctutu.net

The Trojan makes a request to download a silent installer for the software "Super Rabbit":

http://121.15.221.{removed}/soft/113/sr_v9_mini.exe

The Trojan and silent installer make the following modifications to the system:

screenshot

The Trojan sends potential sensitive information to a remote site using the HTTP POST command:

screenshot

SonicWALL Gateway AntiVirus provides protection against this worm via the following signatures:

GAV: Orz.A (Trojan)

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The SonicWall Capture Labs Threat Research Team gathers, analyzes and vets cross-vector threat information from the SonicWall Capture Threat network, consisting of global devices and resources, including more than 1 million security sensors in nearly 200 countries and territories. The research team identifies, analyzes, and mitigates critical vulnerabilities and malware daily through in-depth research, which drives protection for all SonicWall customers. In addition to safeguarding networks globally, the research team supports the larger threat intelligence community by releasing weekly deep technical analyses of the most critical threats to small businesses, providing critical knowledge that defenders need to protect their networks.