quttera - free malicious content detection system

We are an organization founded in 2004 by three brazilian security researchers. Our specialties include network security solutions, vulnerability research, ...

ThinkCore Research - Basic and advanced utilities, technical information, analysis and source code, etc... all related to Microsoft Windows plataform.

MoreNops.com - Reverse Engineering, Vulnerability Research and Exploit Development

An independent computer and network security research site. Topics of concern include network and system vulnerabilities, malware and cryptography.