Monday, October 24, 2005

Not MS05-047 .. Just MS05-039: IRC.Mocbot

After further analysis, this threat does not exploit MS05-047, but rather MS05-039. Initial analysis suggested the MS05-047 was being exploited due to similarities between those exploits (including overlapping code between publicly available source code), field infection reports where administrators incorrectly stated that machines were patched from MS05-039, and similarities between an earlier MS05-039 exploiting bot, where the only significant change was the exploit code being used.