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ATM Security Alert: Deep-Insert Shimmer Attacks


FTSI often discovers deep-insert shimmer devices on ATM units. In this example, even though the new NCR Tamper Resistant Card Reader (TRCR) was installed in the unit, a deep insert shimmer was discovered.



The device was discovered after alerts from customers were reported of their debit cards getting stuck or jammed in the card reader. Upon inspection of the ATM card reader, the deep-insert shimmer was found within the NCR TRCR as the obstruction that was causing the card jam.

The deep-insert shimmer found is a newer type of shimmer that was created to capture the EMV chip off debit cards being inserted into the card reader. The pin camera for this attack was discovered behind the task light upon further investigation.


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NCR Tamper Resistant DIP Card Reader

Without the TRCR, ATM users would have been able to easily insert their cards without obstruction, never knowing the device was compromising their data.




Deep Insert Skimming Attacks: Recommendations and Guidance

Please be aware that these forms of attacks are an industry-wide issue and there are no 100% guarantees for the protection of your ATMs and your customers. Criminals are constantly evolving the skimming/shimming devices to bypass security in place, so it is important to have routine ATM checks to lookout for any signs of tampering.


  • Monitor Your ATM Activity Daily: Branch staff should inspect each ATM multiple times a day to look for signs of suspicious activity. Also regularly review your security footage to inspect for any suspicious activity at your ATMs. Remember: it only takes about 30 seconds to insert a skimmer/shimmer, so multiple ATM checks are recommended to catch ATM tampering before your customers' data is compromised.
  • Review Your ATM's Physical Appearance: Compare your current ATMs against an image of what the ATM originally looked like to see if any surface changes have been made to it. Feel around the surface of the fascia for any signs of raised surfaces that might indicate a tampered piece might be attached to the ATM. If you notice anything suspicious, please contact local authorities immediately to investigate, and follow up with FTSI to assist in a thorough security check on your ATM fleet.

    Review this information with your branch staff to create awareness and to conduct routine ATM security checks. Please contact FTSI at with any additional questions or request for information.