The pervert struck on Monday morning when his victim, a woman in her 30s, was walking near the junction of London Road and Southmill Road.
Three residents received text messages which included a link to a webpage requesting personal and banking details.
The victim left his Audi on the outskirts of Sawbridgeworth in the same spot he regularly parks while he walks his dog.
A female thief has brazenly targeted the same Stortford petrol station four times in a fortnight, stealing two bottles of wine each time.
Sgt Chris Fisher said: "I'd appeal to everyone's sense of decency to do the right thing and follow the clear lockdown rules now in place."
A thief rifled through a 57-year-old woman's purse while his accomplice distracted her with the offer of a free newspaper.
Chief Superintendent Matt Nicholls said: "Anyone found to be knowingly breaking the rules can expect to receive a fixed penalty notice."
The victim, in his 50s, was assaulted in Oriole Way in broad daylight the Sunday before Christmas.
A security guard was assaulted in the Jackson Square multi-storey on Boxing Day evening.
Five people arrested and fines and fixed penalty notices totalling over £18,000 issued at mass gatherings in the county.
Herts force urges public to "stay home and save lives" as anyone caught flouting Covid rules by organising or attending a party will be fined.
They are among five of the force's officers to be awarded Queen's Police Medal while a sixth person gets British Empire Medal.
The attendant, alerted by broken glass, followed the intruder and, after calling police, kept an eye on him until officers arrived.
Probe to smash smuggling ring by specialist unit which tackles serious organised crime in Herts and Essex was subject of TV two-part special.
Two women were touched inappropriately while walking along the Flitch Way country walk near Dunmow in the summer.