Threat increased, but still ‘well contained’. Antivirus vendor Symantec has upgraded the threat warning on the Korgo.F worm affecting Microsoft applications, following an increase in submissions over the last 12 hours. The security response team at Symantec said it had increased the threat level warning on Korgo.F worm from a level two to a level three. However, according to Symantec the threat is still categorised as “well-contained”. Symantec announced the presence of the Korgo.F worm in April of this year, which they say attempts to circulate itself using a Microsoft Windows vulnerability. According to the firm, computers using unpatched Windows 2000 and Windows XP operating systems are susceptible to the worm’s attack, which opens a back door to the Microsoft system through TCP ports 113 and 3067. Full Story