Criminals increasingly are cannibalizing parts from handheld audio players and cheap spy cams to make extremely stealthy and effective ATM skimmers, devices designed to be attached to cash machines and siphon card + PIN data, a new report warns.
The European ATM Security Team (EAST) found that 11 of the 16 European nations covered in the report experienced increases in skimming attacks last year. EAST noted that in at least one country, anti-skimming devices have been stolen and converted into skimmers, complete with micro cameras used to steal PINs.
EAST said it also discovered that a new type of analog skimming device — using audio technology — has been reported by five countries, two of them “major ATM deployers” (defined as having more than 40,000 ATMs).
In the somewhat low-res pictures supplied by EAST here, the audio skimming device is mounted on a piece of plastic that fits over the ATM’s card reader throat. A separate micro camera embedded in the plastic steals the victim’s PIN.
The use of audio technology to record data stored on the magnetic stripe on the backs of all credit and debit cards has been well understood for many years. The basic method for conducting these attacks was mentioned in a 1992 edition of the hacker e-zine Phrack (the edition that explains audio-based skimmers is Phrack 37). Since then, other electronics enthusiasts have blogged about their experiments with sound skimmers; for example, this guy discusses how he made a card reader device out of an old cassette recorder.
Recently, I had a chance to chat via instant message with a hacker in Eastern Europe who sells both audio-based ATM skimmers and the technology needed to decode audio skims or “dumps.” Below are some of the pictures of his wares that he sent me:
Have you seen:
ATM Skimmer Powered by MP3 Player…I’ve noticed quite a few more ads for these MP3-powered skimmers in the criminal underground, perhaps because audio skimmers allow fraudsters to sell lucrative service contracts along with their theft devices. The vendor of this skimmer kit advertises “full support after purchase,” and “easy installation (10-15 seconds).” But the catch with this skimmer is that the price tag is misleading. That’s because the audio files recorded by the device are encrypted. The Mp3 files are useless unless you also purchase the skimmer maker’s decryption service, which decodes the audio files into a digital format that can be encoded onto counterfeit ATM cards.