Using gRPC and HTTP/2 for Cryptominer Deployment: An Unconventional Approach

In this blog entry, we discuss how malicious actors are exploiting Docker remote API servers via gRPC/h2c to deploy the cryptominer SRBMiner to facilitate their mining of XRP on Docker hosts...

A week in security (October 14 – October 20)

Last week on Malwarebytes Labs: Unauthorized data access vulnerability in macOS is detailed by Microsoft 23andMe will retain your genetic information, even if you delete the account "Nudify" deepfake bots remove clothes from victims in minutes, and millions are using them Tor Browser and Firefox...

U.S. and Allies Warn of Iranian Cyberattacks on Critical Infrastructure in Year-Long Campaign

Cybersecurity and intelligence agencies from Australia, Canada, and the U.S. have warned about a year-long campaign undertaken by Iranian cyber actors to infiltrate critical infrastructure organizations via brute-force attacks. "Since October 2023, Iranian actors have used brute force and passwor...

Hackers Abuse EDRSilencer Tool to Bypass Security and Hide Malicious Activity

Threat actors are attempting to abuse the open-source EDRSilencer tool as part of efforts to tamper endpoint detection and response EDR solutions and hide malicious activity. Trend Micro said it detected "threat actors attempting to integrate EDRSilencer in their attacks, repurposing it as a mean...

CISA, FBI, NSA, and International Partners Release Advisory on Iranian Cyber Actors Targeting Critical Infrastructure Organizations Using Brute Force

Today, CISA—with the Federal Bureau of Investigation FBI, the National Security Agency NSA, and international partners—released joint Cybersecurity Advisory Iranian Cyber Actors Brute Force and Credential Access Activity Compromises Critical Infrastructure. This advisory provides known indicators...

Iranian Cyber Actors’ Brute Force and Credential Access Activity Compromises Critical Infrastructure Organizations

Summary The Federal Bureau of Investigation FBI, the Cybersecurity and Infrastructure Security Agency CISA, the National Security Agency NSA, the Communications Security Establishment Canada CSE, the Australian Federal Police AFP, and Australian Signals Directorate's Australian Cyber Security...

5 Techniques for Collecting Cyber Threat Intelligence

To defend your organization against cyber threats, you need a clear picture of the current threat landscape. This means constantly expanding your knowledge about new and ongoing threats. There are many techniques analysts can use to collect crucial cyber threat intelligence. Let's consider five...

New Malware Campaign Uses PureCrypter Loader to Deliver DarkVision RAT

Cybersecurity researchers have disclosed a new malware campaign that leverages a malware loader named PureCrypter to deliver a commodity remote access trojan RAT called DarkVision RAT. The activity, observed by Zscaler ThreatLabz in July 2024, involves a multi-stage process to deliver the RAT...

Imperva Defends Against Targeted Exploits Used By APT29 Hackers

Recently, U.S. and U.K. cyber agencies have warned of a renewed wave of attacks led by Russian APT29 hackers. These sophisticated threat actors have been actively exploiting vulnerabilities in Zimbra Collaboration Suite and JetBrains TeamCity, specifically CVE-2022-27924 and CVE-2023-42793, to...

Supply Chain Attacks Can Exploit Entry Points in Python, npm, and Open-Source Ecosystems

Cybersecurity researchers have found that entry points could be abused across multiple programming ecosystems like PyPI, npm, Ruby Gems, NuGet, Dart Pub, and Rust Crates to stage software supply chain attacks. "Attackers can leverage these entry points to execute malicious code when specific...

FBI Creates Fake Cryptocurrency to Expose Widespread Crypto Market Manipulation

The U.S. Department of Justice DoJ has announced arrests and charges against several individuals and entities in connection with allegedly manipulating digital asset markets as part of a widespread fraud operation. The law enforcement action – codenamed Operation Token Mirrors – is the result of...

GitHub, Telegram Bots, and ASCII QR Codes Abused in New Wave of Phishing Attacks

A new tax-themed malware campaign targeting insurance and finance sectors has been observed leveraging GitHub links in phishing email messages as a way to bypass security measures and deliver Remcos RAT, indicating that the method is gaining traction among threat actors. "In this campaign,...

CISA Warns of Threat Actors Exploiting F5 BIG-IP Cookies for Network Reconnaissance

The U.S. Cybersecurity and Infrastructure Security Agency CISA is warning that it has observed threat actors leveraging unencrypted persistent cookies managed by the F5 BIG-IP Local Traffic Manager LTM module to conduct reconnaissance of target networks. It said the module is being used to...

Experts Warn of Critical Unpatched Vulnerability in Linear eMerge E3 Systems

Cybersecurity researchers are warning about an unpatched vulnerability in Nice Linear eMerge E3 access controller systems that could allow for the execution of arbitrary operating system OS commands. The flaw, assigned the CVE identifier CVE-2024-9441, carries a CVSS score of 9.8 out of a maximum...

Best Practices to Configure BIG-IP LTM Systems to Encrypt HTTP Persistence Cookies

CISA has observed cyber threat actors leveraging unencrypted persistent cookies managed by the F5 BIG-IP Local Traffic Manager LTM module to enumerate other non-internet facing devices on the network. F5 BIG-IP is a suite of hardware and software solutions designed to manage and secure network...

Cybercriminals Use Unicode to Hide Mongolian Skimmer in E-Commerce Platforms

Cybersecurity researchers have shed light on a new digital skimmer campaign that leverages Unicode obfuscation techniques to conceal a skimmer dubbed Mongolian Skimmer. "At first glance, the thing that stood out was the script's obfuscation, which seemed a bit bizarre because of all the accented...

Google Search user interface: A/B testing shows security concerns remain

For the past few days, Google has been A/B testing some subtle visual changes to its user interface for the search results page. You may only get the new UI for certain types of searches or based on your current geolocation. This test is not to be confused with but could part of a previously...

N. Korean Hackers Use Fake Interviews to Infect Developers with Cross-Platform Malware

Threat actors with ties to North Korea have been observed targeting job seekers in the tech industry to deliver updated versions of known malware families tracked as BeaverTail and InvisibleFerret. The activity cluster, tracked as CL-STA-0240, is part of a campaign dubbed Contagious Interview tha...

Microsoft Detects Growing Use of File Hosting Services in Business Email Compromise Attacks

Microsoft is warning of cyber attack campaigns that abuse legitimate file hosting services such as SharePoint, OneDrive, and Dropbox that are widely used in enterprise environments as a defense evasion tactic. The end goal of the campaigns are broad and varied, allowing threat actors to compromis...

Large scale Google Ads campaign targets utility software

After what seemed like a long hiatus, we've observed threat actors returning to malvertising to drop malware disguised as software downloads. The campaign we identified is high-impact, going after utility software such as Slack, Notion, Calendly, Odoo, Basecamp, and others. For this blog, we...