Two new worms are exploiting a
flaw
that Microsoft patched last
week and it appears
separate hacking groups are competing to infect machines.
The first worm, Zobot C, is similar to the worms that appeared
yesterday, but has
been augmented so that it can spread via email by pretending to be a
photographic attachment as well as by network sharing. It turns infected
machines into part of a remote controlled botnet and is spreading slowly but
steadily.
The second, Tilebot-F, is spreading much more quickly and downloads spyware
as well as a Trojan allowing remote control of the PC.
"I suspect Tilebot has been written by a different group," said Graham
Cluley, senior technology consultant for
Sophos.
"It now looks as though separate gangs of virus writers are getting in on the
act. It's like a gold rush and everyone is racing to catch the unpatched
computers."
Major antivirus vendors have identified signature files and they are
available for download and Microsoft is
urging
all users to patch systems immediately.
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