As of May 1, 2004 4:15 AM (PST), TrendLabs has declared a Yellow alert to control the spread of this malware. Infection reports have been received from Europe, Asia and the US. This worm exploits the Windows LSASS vulnerability, which is a buffer overrun that allows remote code execution and enables an attacker to gain full control of the affected system. Apply patch if you did not update from Microsoft lately Microsoft Security Bulletin for April 2004 Windows Update Worm Sasser.A The virus was discovered May 1, 2004 and it already infected over 1,271 computers. Please patch your Windows if you did not yet do so.