Even prior victims of online theft can't resist Cyber Monday bargains.

Among more than 1,000 shoppers surveyed by credit score company TransUnion (TRU) , 94% of those who had suffered cyber attacks said they would shop online Monday, as retailers and online thieves gear up for a banner day. Of the victims, 71% said they were hacked during the holidays.

Online crooks have put seasonal twists on old tactics such as bogus emails containing links to malicious sites and now are using social media, mobile messages and other tactics to separate shoppers from their cash.

"During the first few years of Cyber Monday" -- the term was coined in the middle of the last decade -- "there weren't a lot of scams or things like that around the holidays," said Bruce Snell, cybersecurity and privacy director of Intel's (INTC) security arm. "With recent activity that we've seen, we'll definitely see an increase in scams via social media or phishing via email or even though [text messages] that are trying to trick people into clicking on these links."

Cybercrooks know that shoppers will be looking for, and expecting to find, major savings on Monday. They will send deceptive emails or create fake ads that use shoppers' eagerness to find a bargain against them.

"They'll promise things like extreme discounts on hot new items, coupons or 'enter to win' [contests]," Snell said. "These are things that people are looking for already when they are trying to find deals. The cybercriminals are definitely going to take advantage of that."

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