The technical characteristics of the aLTEr attack are comparable to IMSI catchers, as in both cases the attacker simulates
a malicious network towards the victim. Nevertheless, we find two general differences. First, the aLTEr relay
actively sends data to the mobile network and acts as a Man-in-the-Middle attacker that modifies packet contents. Second, classical IMSI-catching
attacks try to identify and localize the victim. In the aLTEr attack, we redirect DNS packets to perform
DNS spoofing and then hijack network connections.

Sumber: Hacker News