The SolarWinds supply chain attackers manipulated OAuth app certificates to maintain persistence and access privileged resources, including email, according to researchers at Proofpoint.
Swiss cybersecurity firm Prodaft says it has accessed several servers used by an advanced persistent threat group tied to the SolarWinds supply chain attack. These attackers continue to target large corporations and public institutions worldwide, with a focus on the U.S. and the European Union, the researchers say.
Email security vendor Mimecast, which was targeted by the SolarWinds supply chain hack in January, reports in a Tuesday update that the hackers used the "Sunburst" backdoor as an initial attack vector to steal some source code. But Mimecast says it "found no evidence of any modifications" to that code.
Serious vulnerabilities in Microsoft Exchange have been exploited by at least 10 APT groups that have been collectively been hitting thousands of companies over the last three months, including prior to when Microsoft was first alerted to the flaws and issued a patch, security researchers warn.
Russian hackers apparently weren't the only ones targeting SolarWinds customers. An attack last year by the Spiral hacking group, believed to be based in China, against one organization used malware that targeted a vulnerability in SolarWinds' Orion software, according to the Secureworks Counter Threat Unit.
Using a nearly 20-year-old file transfer product - what could go wrong? Among the many lessons to be learned from the Accellion File Transfer Appliance mess is this: Attackers will devote substantial resources to reverse-engineer hardware, software or a service if there's a financial upside.
Prolific Ryuk ransomware has a new trick up its sleeve. "A Ryuk sample with worm-like capabilities - allowing it to spread automatically within networks it infects" was recently discovered during an incident response effort, warns CERT-FR, the French government's computer emergency response team.
Microsoft is making available the CodeQL queries it used to detect malicious implants in the massive supply chain attack that affected SolarWinds, tech firms and government agencies.
The Senate Intelligence Committee's hearing about the supply chain attack that affected SolarWinds and dozens of other companies and federal agencies answered some questions about what went wrong but also raised four key issues.
In an update on the investigation into the SolarWinds supply chain attack, Deputy National Security Adviser Anne Neuberger said the Biden administration is preparing "executive action" to address security shortcomings that have come to light.
More than 1,000 developers likely worked on rewriting code for the massive SolarWinds supply chain attack that affected many companies and U.S. government agencies, Microsoft President Brad Smith said in a Sunday interview, pointing out the attack is most likely continuing.
The Biden administration has appointed Anne Neuberger, the deputy national security adviser for cyber and emerging technology, to coordinate the investigation into the cyberattack that targeted SolarWinds and other organizations, following criticism from two senators that the probe has lacked coordination.
A multinational law enforcement operation has disrupted the Emotet botnet, gaining control of hundreds of servers and arresting multiple alleged administrators in Ukraine, Europol says. While the botnet could rebound, cybersecurity experts say the criminal operation has been dealt "a huge blow."
Email security vendor Mimecast confirmed Tuesday that the hackers responsible for the SolarWinds supply chain hack also breached the security firm's network to compromise a digital certificate that encrypts data that moves between some of the firm's products and Microsoft's servers.
Microsoft researchers are offering fresh details on the SolarWinds hackers' extensive efforts to remain hidden, which gave them more time to fully penetrate systems, move laterally through networks and exfiltrate data in follow-on attacks.
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