Mitigation for Exchange Zero-Days Bypassed! Microsoft Issues New Workarounds

Microsoft has revised its mitigation measures for the newly disclosed and actively exploited zero-day flaws in Exchange Server after it was found that they could be trivially bypassed. The two vulnerabilities, tracked as CVE-2022-41040 and CVE-2022-41082, have been codenamed ProxyNotShell due to...

WARNING: New Unpatched Microsoft Exchange Zero-Day Under Active Exploitation

Security researchers are warning of previously undisclosed flaws in fully patched Microsoft Exchange servers being exploited by malicious actors in real-world attacks to achieve remote code execution on affected systems. The advisory comes from Vietnamese cybersecurity company GTSC, which...

Researchers Warn of Ongoing Mass Exploitation of Zimbra RCE Vulnerability

The U.S. Cybersecurity and Infrastructure Security Agency CISA on Thursday added two flaws to its Known Exploited Vulnerabilities Catalog, citing evidence of active exploitation. The two high-severity issues relate to weaknesses in Zimbra Collaboration, both of which could be chained to achieve...

Malicious IIS extensions quietly open persistent backdoors into servers

Attackers are increasingly leveraging Internet Information Services IIS extensions as covert backdoors into servers, which hide deep in target environments and provide a durable persistence mechanism for attackers. While prior research has been published on specific incidents and variants, little...

Hackers Targeting VoIP Servers By Exploiting Digium Phone Software

VoIP phones using Digium's software have been targeted to drop a web shell on their servers as part of an attack campaign designed to exfiltrate data by downloading and executing additional payloads. "The malware installs multilayer obfuscated PHP backdoors to the web server's file system,...

Microsoft Warns of Cryptomining Malware Campaign Targeting Linux Servers

A cloud threat actor group tracked as 8220 has updated its malware toolset to breach Linux servers with the goal of installing crypto miners as part of a long-running campaign. "The updates include the deployment of new versions of a crypto miner and an IRC bot," Microsoft Security Intelligence...

ToddyCat exploits unknown vulnerability in Microsoft Exchange servers to targets entities in Europe and Asia

Threat Level Actor Report For a detailed advisory, download the pdf file here Summary ToddyCat, an APT group is deploying web shells by exploiting an unknown vulnerability in the Microsoft Exchange Servers. They are initiating a multi-stage infection that aims at governmental bodies in Europe and...

Top Five Attacking IPs This Month: Their Locations May Not Be Where You Think

At Wordfence, we see large amounts of threat actor data, and often that data tells unexpected stories. Taking a look at just the top five attacking IP addresses over a 30 day period, you might be surprised to find out where these attacks are originating, and what they are doing. When most people...

“Multiple adversaries” exploiting Confluence vulnerability, warns Microsoft

Microsoft has warned that "multiple adversaries and nation-state actors" are making use of the recent Atlassian Confluence RCE vulnerability. A fix is now available for CVE-2022-26134. It is essential users of Confluence address the patching issue immediately. Confluence vulnerability: Background...

YODA Tool Found ~47,000 Malicious WordPress Plugins Installed in Over 24,000 Sites

As many as 47,337 malicious plugins have been uncovered on 24,931 unique websites, out of which 3,685 plugins were sold on legitimate marketplaces, netting the attackers $41,500 in illegal revenues. The findings come from a new tool called YODA that aims to detect rogue WordPress plugins and trac...

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...

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...

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...

Hackers Backdoored Systems at China's National Games Just Before Competition

Systems hosting content pertaining to the National Games of China were successfully breached last year by an unnamed Chinese-language-speaking hacking group. Cybersecurity firm Avast, which dissected the intrusion, said that the attackers gained access to a web server 12 days prior to the start o...

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...

CISA Warns of Actively Exploited Critical Zoho ManageEngine ServiceDesk Vulnerability

The U.S. Federal Bureau of Investigation FBI and the Cybersecurity and Infrastructure Security Agency CISA are warning of active exploitation of a newly patched flaw in Zoho's ManageEngine ServiceDesk Plus product to deploy web shells and carry out an array of malicious activities. Tracked as...

New Microsoft Exchange 'ProxyToken' Flaw Lets Attackers Reconfigure Mailboxes

Details have emerged about a now-patched security vulnerability impacting Microsoft Exchange Server that could be weaponized by an unauthenticated attacker to modify server configurations, thus leading to the disclosure of Personally Identifiable Information PII. The issue, tracked as...

Top 15 Vulnerabilities Attackers Exploited Millions of Times to Hack Linux Systems

Close to 14 million Linux-based systems are directly exposed to the Internet, making them a lucrative target for an array of real-world attacks that could result in the deployment of malicious web shells, coin miners, ransomware, and other trojans. That's according to an in-depth look at the Linu...

WARNING: Microsoft Exchange Under Attack With ProxyShell Flaws

The U.S. Cybersecurity and Infrastructure Security Agency is warning of active exploitation attempts that leverage the latest line of "ProxyShell" Microsoft Exchange vulnerabilities that were patched earlier this May, including deploying LockFile ransomware on compromised systems. Tracked as...

When coin miners evolve, Part 2: Hunting down LemonDuck and LemonCat attacks

Note: In this two-part blog series, we expose a modern malware infrastructure and provide guidance for protecting against the wide range of threats it enables. Part 1 covered the evolution of the threat, how it spreads, and how it impacts organizations. Part 2 provides a deep dive on the attacker...