CISA Alert: Top 15 Routinely Exploited Vulnerabilities

The U.S. Cybersecurity & Infrastructure Security Agency has published its report on the top exploited vulnerabilities of 2021. This blog summarizes the report’s findings and how you can use Qualys VMDR to automatically detect and remediate these risks in your enterprise environment. The...

Hive Ransomware targets organizations with ProxyShell exploit

THREAT LEVEL: Red. For a detailed advisory, download the pdf file here Hive Ransomware has been active since its discovery in June 2021, and it is constantly deploying different backdoors, including the Cobalt Strike beacon, on Microsoft Exchange servers that are vulnerable to ProxyShell...

New Incident Report Reveals How Hive Ransomware Targets Organizations

A recent Hive ransomware attack carried out by an affiliate involved the exploitation of "ProxyShell" vulnerabilities in the Microsoft Exchange Server that were disclosed last year to encrypt an unnamed customer's network. "The actor managed to achieve its malicious goals and encrypt the...

PT-2022-10032

Hive нацелились на серверы Microsoft Exchange По сообщениям исследователей из Varonis, для получения начального доступа рансомварщики используют ProxyShell — достаточно старый набор из трех багов CVE-2021-34473, CVE-2021-34523 и CVE-2021-31297, дающий RCE без необходимости аутентификации. В...

Exchange Servers Speared in IcedID Phishing Campaign

The ever-evolving banking trojan IcedID is back again with a phishing campaign that uses previously compromised Microsoft Exchange servers to send emails that appear to come from legitimate accounts. Attackers also are using stealthy new payload-delivery tactics to spread the modular malware...

Magic Hound Exploiting Old Microsoft Exchange ProxyShell Vulnerabilities

THREAT LEVEL: Red. For a detailed advisory, download the pdf file here APT35 aka Magic Hound, an Iranian-backed threat group, has begun using Microsoft Exchange ProxyShell vulnerabilities as an initial attack vector and to execute code through multiple web shells. The group has primarily targeted...

UNC2596 exploits Microsoft’s ProxyShell and ProxyLogon vulnerabilities to distribute Cuba Ransomware

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Microsoft Exchange Server Bugs Exploited by ‘Cuba’ Ransomware Gang

The ransomware gang known as “Cuba” is increasingly shifting to exploiting Microsoft Exchange vulnerabilities – including ProxyShell and ProxyLogon – as initial infection vectors, researchers have found. The group has likely been prying open these chinks in victims’ armor as early as last August,...

Iranian Hackers Targeting VMware Horizon Log4j Flaws to Deploy Ransomware

A "potentially destructive actor" aligned with the government of Iran is actively exploiting the well-known Log4j vulnerability to infect unpatched VMware Horizon servers with ransomware. Cybersecurity firm SentinelOne dubbed the group "TunnelVision" owing to their heavy reliance on tunneling...

Moses Staff Hackers Targeting Israeli Organizations for Cyber Espionage

The politically motivated Moses Staff hacker group has been observed using a custom multi-component toolset with the goal of carrying out espionage against its targets as part of a new campaign that exclusively singles out Israeli organizations. First publicly documented in late 2021, Moses Staff...

Earth Lusca Hackers Aimed at High-Value Targets in Government and Private Sectors

An elusive threat actor called Earth Lusca has been observed striking organizations across the world as part of what appears to be simultaneously an espionage campaign and an attempt to reap monetary profits. "The list of its victims includes high-value targets such as government and educational...

Malicious Exchange Server Module Hoovers Up Outlook Credentials

Researchers have uncovered a previously unknown malicious IIS module, dubbed Owowa, that steals credentials when users log into Microsoft Outlook Web Access OWA. Internet Information Services IIS, Microsoft’s web server/web-hosting software suite, can be extended via various add-ons that are know...

BlackByte ransomware exploits Microsoft Servers ProxyShell Vulnerabilities

THREAT LEVEL: Red. For a detailed advisory, download the pdf file here. BlackByte ransomware is targeting organizations with unpatched ProxyShell vulnerabilities. Proxy Shell was addressed by hive pro threat researcher in the previous advisory released on August 24. ProxyShell is a combination of...

This Week in Security News - December 3, 2021

This week, learn about how Squirrelwaffle utilized ProxyLogon and ProxyShell to hack email chains. Also, read on a recent data breach of the Los Angeles Planned Parenthood Network...

Attackers Hijack Email Using Proxy Logon/Proxyshell Flaws

Attackers are gnawing on the ProxyLogon and ProxyShell vulnerabilities in Microsoft Exchange Server to hijack email chains, by malspamming replies to ongoing email threads, researchers say. What’s still under discussion: whether the offensive is delivering SquirrelWaffle, the new email loader tha...

Hackers Exploiting ProxyLogon and ProxyShell Flaws in Spam Campaigns

Threat actors are exploiting ProxyLogon and ProxyShell exploits in unpatched Microsoft Exchange Servers as part of an ongoing spam campaign that leverages stolen email chains to bypass security software and deploy malware on vulnerable systems. The findings come from Trend Micro following an...

Squirrelwaffle Exploits ProxyShell and ProxyLogon to Hijack Email Chains

Squirrelwaffle is known for using the tactic of sending malicious spam as replies to existing email chains. We look into how by investigating its exploit of Microsoft Exchange Server vulnerabilities, ProxyLogon and ProxyShell...

MuddyWater is taking advantage of old vulnerabilities

THREAT LEVEL: Red. For a detailed advisory, download the pdf file here. The Federal Bureau of Investigation FBI, the Cybersecurity and Infrastructure Security Agency CISA, the Australian Cyber Security Centre ACSC, and the United Kingdoms National Cyber Security Centre NCSC have issued a joint...

U.S., U.K. and Australia Warn of Iranian Hackers Exploiting Microsoft, Fortinet Flaws

Cybersecurity agencies from Australia, the U.K., and the U.S. on Wednesday released a joint advisory warning of active exploitation of Fortinet and Microsoft Exchange ProxyShell vulnerabilities by Iranian state-sponsored actors to gain initial access to vulnerable systems for follow-on activities...

Analyzing ProxyShell-related Incidents via Trend Micro Managed XDR

In this blog entry, we will take a look at the ProxyShell vulnerabilities that were being exploited in these events, and dive deeper into the notable post-exploitation routines that were used in four separate incidents involving these web shell attacks...