Latest cybersecurity reporting from selected sources.

Experts Warn of DDoS, Ransomware, Proxy And Other Attacks on Health SectorThe escalating conflict emerging from the U.S. and Israel military strikes this weekend on Iran, which killed the country's top leadership and crippled its internet connectivity, could erupt into cyberattacks against the healthcare sector by Iranian sympathizers and proxies, experts warn.

Ransomware Group Lynx Reportedly Stole 4TB of DataThe U.K. Ministry of Defense is investigating an apparent data breach by Russian-speaking ransomware hackers of a building facilities contractor with ties to the military. The Lynx ransomware group posted on its darkweb site samples of what it says is 4 terabytes of data stolen from the Dodd Group.

Also: the Recent Ransomware Surge, Crypto Reserve ControversyIn this week's update, four ISMG editors discussed the recent surge in ransomware attacks, implications of the U.S. military's pause on cyber operations against Russia, and President Trump's bold but controversial plan to create a national cryptocurrency reserve.

If this makes you feel sick, knowing this happened before ransomware actors started targeting medical info may help An alleged security SNAFU that occurred during the Obama administration has finally been settled under the second Trump administration.…

French tech giant Atos, which secures communications for the country's military and secret services, has denied claims made by the Space Bears ransomware gang that they compromised one of its databases. [...]

The U.S. Department of Justice (DoJ) on Thursday unsealed an indictment against a North Korean military intelligence operative for allegedly carrying out ransomware attacks against healthcare facilities in the country and funneling the payments to orchestrate additional intrusions into defense, technology, and government entities across the world

Microsoft, Mandiant, weigh in with info about methods used by Andariel gang alleged to have made many, many, heists The US Department of Justice on Thursday charged a North Korean national over a series of ransomware attacks on stateside hospitals and healthcare providers, US defense companies, NASA, and even a Chinese target.…

Hackers Part of Callisto and Armageddon GroupsThe European Union sanctioned four Russian domestic intelligence agency hackers including two military officers who participated in what researchers have described as "hack and leak" operations. Also coming under sanctions are ransomware hackers part of the Wizard Spider criminal group.

The Paraguay military is warning of Black Hunt ransomware attacks after Tigo Business suffered a cyberattack last week impacting cloud and hosting services in the company's business division. [...]

Also: Amazon Sues Alleged Refund Gang, Ukraine Says It Hacked Russian Tax SystemThis week, French police arrested an alleged Hive "banker," Amazon cracked down on a refund fraud ring, Ukraine military intelligence said it hacked the Russian tax system, the U.K. Ministry of Defense was fined and Kraft Heinz said it is doing fine after an alleged ransomware attack.

New ransomware attacks targeting organizations in Ukraine first detected this Monday have been linked to the notorious Russian military threat group known as Sandworm. [...]

A series of attacks targeting transportation and logistics organizations in Ukraine and Poland with Prestige ransomware since October have been linked to an elite Russian military cyberespionage group. [...]

Threat actor groups like Wizard Spider and Sandworm have been wreaking havoc over the past few years – developing and deploying cybercrime tools like Conti, Trickbot, and Ryuk ransomware. Most recently, Sandworm (suspected to be a Russian cyber-military unit) unleashed cyberattacks against Ukranian infrastructure targets

With the US providing military aid to Ukraine and its sanctions damaging the Russian economy, the US government disclosed this week that there is intelligence that Russia is preparing for potential cyberattacks against US interests. [...]

It’s not just Ukraine: There's a flood of intel on Russian military, nukes and crooks, says dark-web intel expert Vinny Troia, even with the Conti ransomware gang shuttering its leaking Jabber chat server.