"Kr.zip" refers to South Korea's 5-digit postal code system (State Basic District Number) introduced in 2015 to improve delivery efficiency. In cybersecurity, similar ZIP files are often used as delivery mechanisms for malware by threat actors. For more details, visit GeoPostcodes . South Korea Zip Code - Download Dataset - GeoPostcodes
South Korea's Postal Code Format. South Korea uses a “우편번호” (postal code) system, which is a five-digit numeric format like 99999, GeoPostcodes Unmasking the DPRK-linked GitHub C2 Espionage Campaign kr.zip