Microsoft says ransomware activity against compromised on-premises Exchange servers remains limited, but it warns that organizations are far from out of the woods.
The SolarWinds supply chain attack demonstrates that Russian intelligence services have learned from previous operations and adjusted their tactics, says Dmitri Alperovitch, the former CTO of security firm CrowdStrike, which investigated Russian interference in the 2016 election.
Criminals operating online continue to tap ransomware in their pursuit of an illicit payday. That was the cybercrime reality throughout 2020, and unfortunately it still appears to be holding true in the first months of this year, the Cisco Talos Incident Response team reports.
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.
An ongoing spear-phishing campaign by the threat group TA800 is distributing a new malware loader based on the Nim programming language that's designed to help avoid detection, according to the cybersecurity company Proofpoint.
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.
A Microsoft Exchange Server at the European Banking Authority, a regulatory agency of the European Union, was hacked. But the agency says there are no indications of data exfiltration.
Ransomware dominated the online-enabled crime landscape in 2020, some security experts say, thanks to the massive profits it's been generating and the relative ease of use for attackers - including support from a burgeoning cybercrime-as-a-service market.
Qualys has confirmed that its Accellion File Transfer Appliance software was breached by zero-day-wielding attackers after stolen customer data appeared on the Clop ransomware gang's data leaks site. The security firm's public breach notification comes more than two months after the firm first learned it had been...
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.
A new malware loader dubbed "Gootloader" is using search engine optimization techniques to spread ransomware, Trojans and other malware, the security firm Sophos reports.
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