Costa Rica May Be Pawn in Conti Ransomware Group’s Bid to Rebrand, Evade Sanctions

By Krebs On Security

Costa Rica’s national health service was hacked sometime earlier this morning by a Russian ransomware group known as Hive. The intrusion comes just weeks after Costa Rican President Rodrigo Chaves declared a state of emergency in response to a data ransom attack from a different Russian ransomware gang — Conti. Ransomware experts say there is good reason to believe the same cybercriminals are behind both attacks, and that Hive has been helping Conti rebrand and evade international sanctions targeting extortion payouts to cybercriminals operating in Russia.

The Costa Rican publication CRprensa.com reports that affected systems at the Costa Rican Social Security Fund (CCSS) were taken offline on the morning of May 31, but that the extent of the breach was still unclear. The CCSS is responsible for Costa Rica’s public health sector, and worker and employer contributions are mandated by law.

A copy of the ransom note left behind by the intruders and subsequently uploaded to Virustotal.com indicates the CCSS intrusion was the work of Hive, which typically demands payment for a digital key needed to unlock files and servers compromised by the group’s ransomware.

On May 8, President Chaves used his first day in office to declare a national state of emergency after the Conti ransomware group threatened to publish gigabytes of sensitive data stolen from Costa Rica’s Ministry of Finance and other government agencies. Conti initially demanded $10 million, and later doubled the amount when Costa Rica refused to pay. On May 20, Conti leaked more than 670 gigabytes of data taken from Costa Rican government servers.

As CyberScoop reported on May 17, Chaves told local media he believed that collaborators within Costa Rica were helping Conti extort the government. Chaves offered no information to support this claim, but the timeline of Conti’s descent on Costa Rica is worth examining.

Most of Conti’s public communications about the Costa Rica attack have very clearly assigned credit for the intrusion to an individual or group calling itself “unc1756.” In March 2022, a new user by the same name registered on the Russian language crime forum Exploit.


Comments

Post a Comment

Popular posts from this blog

Why remote desktop tools are facing an onslaught of cyber threats

Image
By Solomon Klappholz, IT Pro Hackers are increasingly targeting remote desktop tools in their attacks, new research reveals, prompting warnings for enterprises globally In the era of hybrid work, remote desktop tools have become vital business enablers, but due to their pervasiveness on corporate networks they have become a popular entry point for cyber criminals. If successfully exploited, remote access tools can provide hackers with a direct pathway into a system or network, and once access is gained attackers can move laterally within the network, escalating privileges and maintaining persistence. In an investigation into which remote desktop tools are targeted the most, Jonathan Tanner, senior security researcher at Barracuda Networks, explained that remote desktop software poses a particular challenge to IT teams to secure. “Among the security challenges facing IT teams implementing remote desktop software is that there are many different tools available, each using different and ...
Read more

Ransomware gang starts leaking alleged stolen Change Healthcare data

Image
By Lawrence Abrams,  Bleeping Computer The RansomHub extortion gang has begun leaking what they claim is corporate and patient data stolen from United Health subsidiary Change Healthcare in what has been a long and convoluted extortion process for the company. In February, Change Healthcare suffered a cyberattack that caused massive disruption to the US healthcare system , preventing pharmacies and doctors from billing or sending claims to insurance companies. The attack was ultimately linked to the BlackCat / ALPHV ransomware operation, who later said they stole 6 TB of data during the attack . After facing increased pressure from law enforcement, the BlackCat gang shut down their operation . This occurred amid claims they were pulling an exit scam by stealing a $22 million Change Healthcare ransom payment from the affiliate who conducted the attack. While Change Healthcare has declined to comment on whether it has paid a ransom, the affiliate known as "Notchy" said they ...
Read more

FBI, CISA warn US hospitals of targeted BlackCat ransomware attacks

Image
By Sergiu Gatlan,  Bleeping Computer Today, the FBI, CISA, and the Department of Health and Human Services (HHS) warned U.S. healthcare organizations of targeted ALPHV/Blackcat ransomware attacks. "ALPHV Blackcat affiliates have been observed primarily targeting the healthcare sector," the joint advisory cautions. Today's warning follows an April 2022 FBI flash alert and another advisory issued in December 2023 detailing the BlackCat cybercrime gang's activity since it surfaced in November 2021 as a suspected rebrand of the DarkSide and BlackMatter ransomware groups. The FBI linked BlackCat to over 60 breaches during its first four months of activity (between November 2021 and March 2022) and said the gang has raked in at least $300 million in ransoms from over 1,000 victims until September 2023. "Since mid-December 2023, of the nearly 70 leaked victims, the healthcare sector has been the most commonly victimized," the three federal agencies warned in today...
Read more