www.kernelmode.info Best forum on kernel programming, rootkits and other malwares

www.offensivecomputing.net Well known source for malware samples and articles

mnin.blogspot.com MHL's blog - Author of Malware analyst's cookbook

blogs.msdn.com/b/debuggingtoolbox/ Windbg scripts, debugging, tools and techniques

ddanchev.blogspot.com Dancho's blog - Malware research and hot news from the underground

xylibox.blogspot.com Well known malware researcher Xylitol

krebsonsecurity.com Brian Krebs serves us with fresh news from the malware underground

www.osronline.com Home of Ntinsider magazine and very good source to kernel coding

dfsforensics.blogspot.com Andrew case - Volatility core developer and forensics freak

blog.cr4.sh Cr4sh's blog - Skilled russian rootkit researcher

redplait.blogspot.com Redplait's blog - Skilled russian rootkit researcher

analyze-v.com Kernel and Windbg guru Scott Noone

artemonsecurity.blogspot.com Rkhunter's blog - Skilled russian rootkit researcher

contagiodump.blogspot.com Good resource for mobile malware samples

mcdermottcybersecurity.com/articles Some interesting x64 windows articles