From Trend (antivirus.com)
WORM_FIZZER.A is a mass-mailing worm that spreads via email
and Kazaa P2P file sharing networks.
This malware is currently rapidly spreading in Japan,
from where TrendLabs has received a significant number
of infection reports. As of 2:50 P.M. Manila Time, Trend
has declared a Yellow Alert to control the spread of this malware.
Please use the Official Pattern Release 532 to detect WORM_FIZZER.A.
For more information on WORM_FIZZER.A please visit our Web site at:
http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=WORM_FIZZER.A