As of Monday evening they said he had not posted bail and remained in custody.
He is accused of creating and distributing malicious software called Kronos designed to steal banking passwords. She said Hutchins never expected to be in his current situation and that she did not know the identity of his co-defendant.
Hutchins was "doing well, considering what's gone on", Lobo, told reporters.
According to a Justice Department statement, a federal grand jury returned a six-count indictment against Hutchins last month after a two-year investigation.
"He was completely shocked, this isn't something he anticipated".
He achieved overnight fame in May when he was credited with detecting a "kill switch" that effectively disabled the WannaCry worm, which infected hundreds of thousands of computers in May and caused disruptions at vehicle factories, hospitals, shops and schools in more than 150 countries.
He was hailed as an "accidental hero" after he registered a domain name to track the virus, a move that eventually stopped it.
The 23-year-old from Ilfracombe in Devon, who is also known by his online handle of "MalwareTech", was arrested on 4 August 2017 as he prepared to return to the United Kingdom from a security conference in Las Vegas.
Now Hutchins has been arrested at Las Vegas airport, allegedly for creating, or helping to create, the Kronos banking Trojan.
Supporters have leapt to the defense of the 23-year-old Brit, who goes by the handle "MalwareTech", with district judge, Nancy Koppe, presented with letters of support in a bid to sway her bail decision.
Friends and family were not able to raise the bond money, however, so he will not be released until Monday at the earliest. He's also been restricted from accessing the internet.
The US Department of Justice told the Gazette this evening (Monday) bail had been approved on condition he surrender his passport, have no electronic access for any goal, be Global Positioning System monitored and his travel is restricted to Clark County, Nevada.
"He admitted he was the author of the code of Kronos malware and indicated he sold it", Mr Cowhig said.
Hutchins has broad support in the information-security community.
Heaton-Jones wrote to Foreign Office minister Sir Alan Duncan seeking assurance that Hutchins is getting adequate consular assistance.
"These funds are to be spent exclusively on Marcus' legal fees, costs, and expenses, or in the event it's not all used up, donated to the Electronic Frontier Foundation", she added.