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ATMs generally keep the money in locked boxes that are detachable. This boxes are designed for transport, and offer very little in terms of security.

The blast pops the box out, then the box can be opened with regular worshop tools in a safe house.

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I’ve seen ATMs that warn they will release a red dye when tampering is detected that makes the cash unusable. Don’t know if that actually happens.

The trays do blow the red ink, however there are companies that (illegally) remove the unremoveable marking ink. Being part of a research group regarding ATM security was a really nice experience for me. It's a different world, full of unexpected things.

Most ATM’s are cheap Hyosung, tranax, etc. they most certainly do not have dye packs.

Source: I used to operate some ATM’s as a side biz.

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