Telephone Denial-of-Service Attack
Tying Up Your Phone to Target Your Bank Account
Imagine getting hundreds or thousands of calls on your home, business, or cell phone, tying up the lines. And when you answer, you hear anything from dead air to recorded messages, advertisements, or even phone sex menus.
It's annoying, no doubt. But it could be more than that: it could be a sign that you're being victimized by a "telephone denial-of-service attack" scam as a precursor to a crime targeting your bank accounts.
Denial-of-service (DOS) attacks, by themselves, are nothing new. Computer hackers use them to take down websites by flooding them with large amounts of traffic.
In a more recent twist, criminals have transferred this activity to telephones, using automated dialing programs and multiple accounts to overwhelm the phone lines of unsuspecting citizens.
Why are they doing it?
Turns out the calls are simply a diversionary tactic: while the lines are tied up, the criminals — masquerading as the victims themselves — are raiding the victims' bank accounts and online trading or other money management accounts.
Here, in a nutshell, is how the whole thing works:
Law enforcement and industry response.
The FBI first learned about this emerging scheme through one of its private industry partners, which told us how a Florida dentist lost $400,000 from his retirement account after a denial-of-service attack on his phones.
Since then, there has been a noticeable surge in telephone denial-of-service attacks, with numerous incidents having been reported in several Eastern states.
To help fight these schemes, the FBI has teamed up with the Communication Fraud Control Association — comprised of security professionals from communication providers — to analyze the patterns and trends of telephone denial-of-service attacks, educate the public, and identify the perpetrators and bring them to justice.
Ultimately, though, it's individual consumers and small- and medium-sized businesses on the front line of this battle. So take precautions: never give out personal information to an unsolicited phone caller or via e-mail; change online banking and automated telephone system passwords frequently; check your account balances often; and protect your computers with the latest virus protection and security software.
And if you think you may have been targeted by a telephone denial-of-service attack, contact your financial institution and your telephone provider, and file a complaint with the FBI's Internet Crime Complaint Center.
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