UnitedHealth’s CEO says the company paid a $22 million ransom to hackers who compromised data, possibly affecting 1 out of 3 Americans. ABC News' Perry Russom reports how the hackers did it.

Cyberattacks on businesses are rising, including small businesses

Police in London say they have infiltrated and disrupted a website that allowed international cyber fraudsters to trick up to 70,000 British victims into revealing personal information such as bank account details and passwords

Emergency services are increasingly likely targets for cyberattacks, warns the Department of Homeland Security.

Brooklyn-based victims were scammed out of $5 million after they were convinced to invest in cryptocurrency.

ABC News’ Erielle Reshef spoke with Dr. Chris Pierson, CEO of BlackCloak on what customers can do if their data was compromised in the AT&T data leak.

The telecom giant says over 70 million current and former AT&T customers from 2019 or earlier had their personal information leaked onto the dark web.

The United States has sanctioned China-based hackers for allegedly targeting U.S. critical infrastructure, the Treasury Department announced Monday.

"Impact x Nightline" takes a look at some of the most sensational stories of people getting played by phony people online.

The UnitedHealth Group said it is making progress in its recovery from one of the worst cyberattacks on a health care system in United States history.

A Russian state-backed group that Microsoft said hacked into its corporate email accounts was able to gain access to its core software systems, the company said.

In a new cyber alert, the FBI and its international partners warn that Russians are exploiting Ubiquiti EdgeRouters and using their default credentials to hack into them.

ABC News’ Lionel Moise spoke with cybersecurity expert and www.sugarshot.io co-founder Scott Spiro about the breach and how it’s affecting patients.

Thousands of pharmacies are struggling to fill prescription drug orders because they use Change Healthcare's network to verify insurance coverage.

The Royal Canadian Mounted Police launched a criminal investigation into what happened and how their systems were able to be breached, the agency told ABC News.

Hackers from China spent up to five years in U.S. networks as part of a cyber operation that targeted U.S. critical infrastructure, law enforcement agencies said.

Lurie Children's Hospital was hit with a cybersecurity incident that's caused network outages to its electronic records and communications systems.

Intelligence leaders are warning that the country's civilian infrastructure, including water and power systems, is vulnerable to hackers now working on behalf of the Chinese government.

The 'Volt Typhoon" operation targeted U.S. infrastructure, the FBI director said

China's hackers are preparing to "wreak havoc" and "cause real world harm" to Americans, FBI Director Christopher Wray warned on Wednesday.

Microsoft said its security team detected the attack earlier in January and identified the hacker as the Russian state-sponsored hacker group “Midnight Blizzard.”

Microsoft revealed that the Russian-backed hacker group Midnight Blizzard infiltrated a "small percentage" of the company's corporate email accounts.

A foreign exchange student who disappeared in an alleged cyber kidnapping was found safe inside a tent on a Utah mountainside following a dayslong search, police said.

Corewell Health, a Michigan health system, reported a data breach among a vendor that may have exposed personal and medical data of more than 1 million patients.

The company said it involves "substantially all of our current and former customers" sensitive personal information.

Office retail company Staples was hit with a cyberattack, the company announced in a post on their website Thursday.

It is unclear what type of cyberattack occurred.

A New Jersey health system says its recent outages are likely the result of a cyberware attack, the latest health care organization to be a victim of such attacks.

A ransomware attack hit Ardent Health Services, which operates 30 hospitals in six states.

The attack targeted part of the system near Pittsburgh that was made by an Israeli company.

Iranian-based hackers claimed they targeted part of the Aliquippa water system because it uses software developed by an Israeli company.

A cyber group backed by Iran has claimed responsibility for taking partial control of a water treatment plant in Pennsylvania. ABC News’ Rhiannon Ally has details.

A new report details alleged funding mechanism of North Korean cyber espionage.

Pro-Russia hackers have claimed responsibility for a cyber attack that crashed the British royal family's website over the weekend.

MGM Resorts have systems down after being targeted by a hacker a week ago. The disruptions have resulted in a cyber investigation by the FBI.

ABC News business reporter Alexis Christoforous breaks down the new warning from Clorox after a cyber-attack.

An August cyberattack on Clorox caused "wide-scale disruptions" in its operations, which could mean product delays and shortages, according to a securities filing Monday.

An August cyberattack on Clorox caused "wide-scale disruptions" in its operations, which could mean product delays and shortages, according to a securities filing Monday.

An August cyberattack on Clorox caused "wide-scale disruptions" in its operations, which could mean product delays and shortages, according to a securities filing.

MGM Resorts International said Thursday that it is still working to resolve issues from a cyberattack as another major resort operation said it was targeted too.

Hackers targeting hotels and casinos in Las Vegas are threatening to do more damage unless their demands are met.

MGM properties says the hack crippled key cards, slot machines and ATMs at nearly a dozen of its resorts and casinos on the Strip.

MGM Resorts International said on Thursday it is still working to resolve issues after Sunday's attack while Caesars Entertainment acknowledged it was also the target of a cyberattack.

A shadow hacker group is claiming responsibility for the attack on MGM hotels boasting how easily they crippled the company.

IT systems at several major hotels along the casino strip were in the dark following a cyberattack on their computers, MGM hotel officials said.

IT systems at several major hotels along the casino strip were in the dark following a cyberattack on their computers, MGM hotel officials said.

The Justice Department earlier this week charged nine Russian nationals who they say used Russian-based malware in cyberattacks to steal money from U.S. companies.

The U.S. ambassador to China and the State Department’s Assistant Secretary for East Asia Daniel Kritenbrink’s email accounts were breached by China-based hackers.

The White House has announced a plan to place labels on internet-connected devices that meet security standards set by the federal government.

U.S. government networks were hit by a cyberattack affecting several federal agencies, Cybersecurity and Infrastructure Security Agency Director Jen Easterly confirmed on Thursday.