Twice, after software elements were detected as malicious by anti-virus programs
, the campaign paused and then began distributing newer versions that escaped scrutiny, Check Point researcher Shahar Tal said.
such as McAfee and Norton protect against specific viruses that have been discovered; these programs are a cure.
According to BBC, the novel versions of the viruses are unknown to anti-virus programs
which let the malicious programs persist and take over the machine so it can be mined for saleable data or used to send spam or to attack other machines.
Graham Cluley of Sophos said that becauseWindows users are more likely to be running up-to-date anti-virus programs
, many Mac users are missing a "valuable safety net".
Unfortunately, it is very difficult for anti-virus programs
to remain up-to-date with the latest information on all potential virus attacks.
Its analysis of 240m web pages over 13 months showed that fake anti-virus programs
accounted for 15 percent of all malicious software.
The new technology also opens more potential in further development of the program mentioned in a number of feedbacks from the users who noted that it was sometimes detected as an ambiguous tool to some certain anti-virus programs
In any case, most anti-virus programs
detect the viruses
Additionally, the SIR report pointed to the spread of rogue anti-virus programs
as a significant threat.
According to Mary Landesman of ScanSafe, the recent Federal Trade Commission (FTC) injunctions against two companies accused of distributing fake anti-virus programs
is a step in the right direction but against a backdrop of widespread abuse.
The Post-Intelligencer report recommends that any users who accessed their Web site Sunday morning run anti-virus programs
on their computer to remove any potential problems.
Symantec said nearly two thirds of the programs have been created in the last year, with cyber criminals sending out malware intended to fool anti-virus programs
looking for characteristics that they have seen already.