I'm aware that SIM cards can store malware according to this question but what equipment would be needed to do such an attack? For example, would you need a Computer and a SIM card reader or could it get infected from a normal Android phone?
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a sim-card writer perhaps? And a computer of course.– MauriceJan 4, 2022 at 3:52
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1 Answer
You are incorrect, a sim card contains almost no memory capacity whatsoever and a SIM can only be written once.
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2A (very) quick search will show that SIM cards can store various things, like a simple address book and SMS text messages. It is entirely possible that a malformed text message or address book entry could store persistent malware.– userJun 2, 2022 at 14:10
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SIMs are routinely updated over the air (OTA update) by operators. Look up GSM 03.48 for a common protocol used to do so... Jun 2, 2022 at 16:06