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Hackers Using Malicious IIS Server Module to Steal Microsoft Exchange Credentials

Hackers Using Malicious IIS Server Module to Steal Microsoft Exchange Credentials

Dec 15, 2021
Malicious actors are deploying a previously undiscovered binary, an Internet Information Services ( IIS ) webserver module dubbed " Owowa ," on Microsoft Exchange Outlook Web Access servers with the goal of stealing credentials and enabling remote command execution. "Owowa is a C#-developed .NET v4.0 assembly that is intended to be loaded as a module within an IIS web server that also exposes Exchange's Outlook Web Access (OWA)," Kaspersky researchers Paul Rascagneres and Pierre Delcher  said . "When loaded this way, Owowa will steal credentials that are entered by any user in the OWA login page, and will allow a remote operator to run commands on the underlying server." The idea that a rogue IIS module can be fashioned as a backdoor is not new. In August 2021, an exhaustive study of the IIS threat landscape by Slovak cybersecurity company ESET revealed  as many as 14 malware families that were developed as native IIS modules in an attempt to interc
Several Malware Families Targeting IIS Web Servers With Malicious Modules

Several Malware Families Targeting IIS Web Servers With Malicious Modules

Aug 04, 2021
A systematic analysis of attacks against Microsoft's Internet Information Services (IIS) servers has revealed as many as 14 malware families, 10 of them newly documented, indicating that the Windows-based web server software continues to be a hotbed for  natively developed malware  for close to eight years. The findings were presented today by ESET malware researcher Zuzana Hromcova at the  Black Hat USA security conference . "The various kinds of native IIS malware identified are server-side malware and the two things it can do best is, first, see and intercept all communications to the server, and second, affect how the requests are processed," Hromcova told in an interview with The Hacker News. "Their motivations range from cybercrime to espionage, and a technique called SEO fraud." Government institutions in three Southeast Asian countries, a major telecommunications company in Cambodia, and a research institution in Vietnam, as well as dozens of private
How to Find and Fix Risky Sharing in Google Drive

How to Find and Fix Risky Sharing in Google Drive

Mar 06, 2024Data Security / Cloud Security
Every Google Workspace administrator knows how quickly Google Drive becomes a messy sprawl of loosely shared confidential information. This isn't anyone's fault; it's inevitable as your productivity suite is purposefully designed to enable real-time collaboration – both internally and externally.  For Security & Risk Management teams, the untenable risk of any Google Drive footprint lies in the toxic combinations of sensitive data, excessive permissions, and improper sharing. However, it can be challenging to differentiate between typical business practices and potential risks without fully understanding the context and intent.  Material Security, a company renowned for its innovative method of protecting sensitive data within employee mailboxes, has recently launched  Data Protection for Google Drive  to safeguard the sprawl of confidential information scattered throughout Google Drive with a powerful discovery and remediation toolkit. How Material Security helps organ
Hackers Exploiting Microsoft Servers to Mine Monero - Makes $63,000 In 3 Months

Hackers Exploiting Microsoft Servers to Mine Monero - Makes $63,000 In 3 Months

Sep 28, 2017
Mining cryptocurrencies can be a costly investment as it takes a monstrous amount of computing power, and thus hackers have started using malware that steals computing resources of computers it hijacks to make lots of dollars in digital currency. Security researchers at security firm ESET have spotted one such malware that infected hundreds of Windows web servers with a malicious cryptocurrency miner and helped cybercriminals made more than $63,000 worth of Monero (XMR) in just three months. According to a report published by ESET today, cybercriminals only made modifications to legitimate open source Monero mining software and exploited a known vulnerability in Microsoft IIS 6.0 to secretly install the miner on unpatched Windows servers. Although ESET's investigation does not identify the attackers, it reports that the attackers have been infecting unpatched Windows web servers with the cryptocurrency miner since at least May 2017 to mine 'Monero,' a Bitcoin-like
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