There has been a spike in web shells being detected as ransomware gangs and other attackers increasingly target vulnerable on-premises Microsoft Exchange servers following publication of proof-of-concept attack code for ProxyLogon, which is one of four zero-day flaws patched by Microsoft in early March.
Four editors at Information Security Media Group - Tom Field, Anna Delaney, Mathew Schwartz and Tony Morbin - review this week’s most important cybersecurity developments, from nation-state threats and supply chain risk, to combating ransomware and adopting a zero trust strategy.
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This edition of the ISMG Security Report features an analysis of the Microsoft Exchange on-premises server hacks – from who might have leaked the vulnerability exploits to how ransomware gangs are taking advantage of the flaws. Also featured: Tackling the cybercrime business model; assessing "zero trust."
The Pysa ransomware strain is increasingly targeting educational institutions in the U.S. and U.K., the FBI warns in a new flash alert. The hackers may threaten to leak exfiltrated data if a ransom is not paid.
To help strengthen the healthcare sector's defenses, the Center for Internet Security is offering all U.S. hospitals and healthcare delivery systems a free protection service designed to help block ransomware and other malware, says Ed Mattison, the center's executive vice president.
Fresh ransomware targeting an unpatched Microsoft Exchange email server flaw appears to have been rushed to market by criminals trying to capitalize on new opportunities before the competition stepped in, resulting in relatively shoddy attack code, security firm Sophos reports.
Hacking incidents - including ransomware attacks, phishing scams and episodes involving vendors - are still the dominant culprits in major health data breaches being reported to federal regulators so far this year. Why?
U.S. public schools faced a record number of cyber incidents in 2020, with over 400 attacks reported. This led to a spike in school cancellations, as IT staff members struggled to get systems back online while dealing with the COVID-19 pandemic, reports the K-12 Cybersecurity Resource Center.
It has been an open question as to how a half-dozen hacking groups began exploiting Exchange servers in an automated fashion in the days leading up to Microsoft's patches. But there are strong signs that the exploit code leaked, and the question now is: Who leaked it?
Attackers wielding DearCry - aka DoejoCrypt - ransomware have begun to exploit the serious proxy-logon flaw in unpatched versions of Microsoft Exchange running on premises. The vulnerability is one of four zero-day flaws patched last week by Microsoft, which APT attackers began exploiting in January.
The latest edition of the ISMG Security Report features cybercrime deterrence lessons learned from the disruption of the Emotet botnet operation. Also featured: An update on attacks tied to Microsoft Exchange flaw exploits; a discussion of the need to update business continuity plans.
Computer security researchers have acquired an enormous list of compromised email servers from the perpetrators of the mass Microsoft Exchange compromises. But a big question looms: How bad is this situation going to get?
Nearly four years after the WannaCry ransomware hit the world, targeting the EternalBlue vulnerability in Microsoft SMB version 1, security firms say the malware continues to be a top threat detected in the wild by endpoint security products. Why won't WannaCry just die?
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.