At 65,000 expired domains a day, registration age has stopped meaning anything

Infoblox Threat Intel has put a number on a practice that quietly breaks one of the cheapest controls in the stack: roughly 65,000 expired domains are re-registered every day through dropcatch services, accounting for nearly one in five new domain registrations ^[3][4]. According to the report, as covered by IT Pro, criminals are spending millions of dollars on those domains specifically because they arrive with the trust, backlinks and residual traffic accumulated by their previous legitimate owners ^[1][2].

The arithmetic is the point. If 65,000 dropcatch registrations are close to a fifth of the daily total, the overall new-domain flow is somewhere around 325,000 a day ^[7], and the dropcatch share alone runs to roughly 23.7 million domains a year ^[9]. That is not a niche technique operated by a handful of specialists. It is a supply chain with pricing, volume and repeat buyers.

The named examples show what the money buys. Infoblox tracked an actor it calls Sable Squirrel, which spent more than $7 million on over 10,000 expired domains used for illegal streaming and malware command and control ^[10]. That is on the order of $700 per domain ^[8], which tells you the buyer is not sweeping up junk at floor prices but paying for specific histories. The same domains reportedly host what look like ordinary streaming sites while simultaneously serving as C2 channels for Quasar RAT and HiddenTear ransomware ^[5]. A second group, Shady Squirrel, has worked with the SocGholish fake-update infrastructure, pushing malware through scareware and call centres ^[6].

For defenders, the uncomfortable part is that this is an attack on the signal, not on the perimeter. Newly registered domain heuristics, reputation scores weighted by age, and allowlists built on established backlink profiles all reward exactly the property a dropcatch buyer has just purchased. Infoblox's own framing is that the combination of volume and inherited trust makes these domains arguably a greater risk than newly registered ones ^[11], which inverts the assumption baked into a lot of filtering policy. A domain registered yesterday at least announces itself. A domain registered in 2014, dropped in 2024 and recaught last week does not, and your feed may still be scoring it on a decade of somebody else's behaviour.

None of this makes age worthless as an input; it makes age worthless on its own. The distinguishing event is not first registration but change of control: a new registrant, new nameservers, new hosting, a gap in resolution, a WHOIS record that resets while the backlink graph stays intact. Those are observable, and they are what reputation systems built on age alone do not capture.

What to watch: whether reputation vendors start publishing re-registration or ownership-change dates as a separate field rather than folding them into a single age score; whether the registrar and dropcatch industry faces any pressure over the buyers spending seven figures at a time ^[1]; and whether the streaming-front pattern Infoblox describes for Sable Squirrel ^[5] shows up in other categories where a plausible public-facing site provides cover for C2.