Since muridae is the family of rodents that includes rats and mice, I believe he's referring to a RAT, a Remote Access Trojan. Something that functions rather like <a href="https://hunt.io/malware-families/reversessh" rel="nofollow">https://hunt.io/malware-families/reversessh or other similar malware, in other words.
HoldOnAMinute · · focus · HN ↗
grahamannett · · focus · HN ↗
rmunn · · focus · HN ↗