Automated dialing machines work through large ranges of phone numbers, intentionally ringing one time, repeatedly, and frequently at random intervals. These phone scams show up as unrecognized or spoofed missed calls hoping the target calls back. If successful, the threat actor attempts to keep the target on the phone as long as possible, as the call has potentially been routed to a premium rate service to be automatically billed hefty charges. Incoming calls may appear as spoofed domestic and international numbers, unknown caller, or no caller ID. Spoofed international calls have appeared to be calling from countries such as Slovenia, Belarus, and Morocco. If the target blocks unrecognized or suspicious numbers, threat actors stay ahead of the game and change the numbers they use. It is not possible to block calls that appear as unknown caller or no caller ID.
Refrain from answering unexpected calls from unknown international or unusual numbers, and returning calls received from unknown or suspicious numbers. Hang up immediately upon callback if an odd message is heard.
Categories: Science and Technology