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429
this
particular
threat
seem
emerge
open-
source,
have
commonly
referred
this
threat
family
MSUpdater
Trojan.
first
time
this
pattern
logged
traffic
traversing
Zscaler
Cloud
infrastructure
12/25/2010
(Christmas
day).
likely
that
Christmas
infection
resulted
from
targeted
phishing
email
related
attacks
this
report
identify
this
infection
vector.
suspicious
transactions
were
observed
from
infected
host
prior
beaconing.
Seculert
FogSense
Cloud-
based
service
observed
instances
this
same
infected
beaconing
pattern
their
customers
early
March
2010.
Zscaler
Seculert
each
identified
these
infections
separately
conducting
traffic
analysis
identify
previously
unknown
threats
then
protect
their
customers.
Open-
source
intelligence
(OSINT)
beaconing
patterns
observed
provided
additional
information
this