'"Tigger removes a long list of other malicious software titles, including the malware most commonly associated with Antivirus 2009...
"It disables Windows Defender, Windows Firewall, Outpost, Avira, Kaspersky, AVG, and CA products in unique ways such as posting malformed messages to windows owned by the daemon processes, sending special byte codes over named pipes, and using the products' own API. It installs a rootkit that runs in safe mode [and] disables kernel debuggers...'
much more:
'Tigger' Trojan Keeps Security Researchers Hopping
Unusual characteristics may make new malware tough to stop, experts say
http://www.darkreading.com/security/attacks/showArticle.jhtml?articleI...1580058