VPNFilter III: More Tools for the Swiss Army Knife of Malware

Summary VPNFilter — a multi-stage, modular framework that has infected hundreds of thousands of network devices across the globe — is now known to possess even greater capabilities. Cisco Talos recently discovered seven additional third-stage VPNFilter modules that add significant functionality t...

Meltdown and Spectre

Cisco Talos is aware of three new vulnerabilities impacting Intel, AMD, Qualcomm and ARM processors used by almost all computers. We are investigating these issues and although we have not observed exploitation of these vulnerabilities in the wild, that does not mean that it has not occurred. We...

Vulnerability Spotlight: Talos-2018-0694 - MKVToolNix mkvinfo read_one_element Code Execution Vulnerability

Piotr Bania, Cory Duplantis and Martin Zeiser of Cisco Talos discovered this vulnerability. Overview Today, Cisco Talos is disclosing a vulnerability that we identified in the MKVToolNix mkvinfo utility that parses the Matroska file format video files .mkv files. MKVToolNix is a set of tools to...

Microsoft Patch Tuesday - January 2018

Today Microsoft has released its monthly set of security advisories for vulnerabilities that have been identified and addressed in various products. This month's advisory release addresses 56 new vulnerabilities with 16 of them rated critical, 39 of them rated important and 1 of them rated...

Tutorial: Mutiny Fuzzing Framework and Decept Proxy

Here's a basic demo video for our new opensource tools, Decept and Mutiny. Happy New Year ^^ Lilith Recently, Talos released new tools to assist in the monumental task of finding vulnerabilities in network applications. Mutiny and Decept work together to help researchers fuzz quickly and...

Microsoft Patch Tuesday - June 2017

Today, Microsoft has release their monthly set of security updates designed to address vulnerabilities. This month's release addresses 92 vulnerabilities with 17 of them rated critical and 75 rated important. Impacted products include Edge, Internet Explorer, Office, Sharepoint, Skype for Busines...

Microsoft Patch Tuesday - April 2018

Microsoft Patch Tuesday - April 2018 Today, Microsoft has released its monthly set of security advisories for vulnerabilities that have been identified and addressed in various products. This month's advisory release addresses 65 new vulnerabilities and one advisory, with 25 of them rated critica...

Threat Roundup for January 3 to January 10

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Jan. 3 and Jan. 10. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics,...

Threat Round Up for December 29 - January 5

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between December 29 and January 05. As with previous round-ups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavior...

Vulnerability Walkthrough: 7zip CVE-2016-2334 HFS+ Code Execution Vulnerability

This blog post was authored by Marcin Noga of Cisco Talos.IntroductionIn 2016 Talos released an advisory for CVE-2016-2334, which was a remote code execution vulnerability affecting certain versions of 7zip, a popular compression utility. In this blog post we will walk through the process of...

Microsoft Patch Tuesday - July 2017

Today, Microsoft has release their monthly set of security updates designed to address vulnerabilities. This month's release addresses 54 vulnerabilities with 19 of them rated critical, 32 rated important, and 3 rated moderate. Impacted products include Edge, .NET Framework, Internet Explorer,...

New Snort rule addresses critical vulnerability in F5 BIG-IP

By Jon Munshaw. Cisco Talos just released Snort coverage for a prominent vulnerability in F5’s BIG-IP. BIG-IP is one of the most popular networking products on the modern market. This product is used to shape web traffic, access gateways, limit rates and much more. F5 disclosed a remote code...

Microsoft Patch Tuesday - May 2018

Today, Microsoft has released its monthly set of security advisories for vulnerabilities that have been identified and addressed in various products. This month's advisory release addresses 67 new vulnerabilities, with 21 of them rated critical, 42 of them rated important, and four rated as low...

Microsoft Patch Tuesday — June 2019: Vulnerability disclosures and Snort coverage

Microsoft released its monthly security update today, disclosing a variety of vulnerabilities in several of its products. The latest Patch Tuesday covers 88 vulnerabilities, 18 of which are rated “critical," 69 that are considered "important" and one "moderate." This release also includes a...

Vulnerability Spotlight: Tinysvcmdns Multi-label DNS DoS Vulnerability

Overview Talos is disclosing a single NULL pointer dereference vulnerability in the tinysvcmdns library. Tinysvcmdns is a tiny MDNS responder implementation for publishing services. This is essentially a mini and embedded version of Avahi or Bonjour. Details Discovered by Claudio Bozzato, Yves...

GlitchPOS: New PoS malware for sale

Warren Mercer and Paul Rascagneres authored this post with contributions from Ben Baker. Executive summary Point-of-sale malware is popular among attackers, as it usually leads to them obtaining credit card numbers and immediately use that information for financial gain. This type of malware is...

JasperLoader Emerges, Targets Italy with Gootkit Banking Trojan

Nick Biasini and Edmund Brumaghin authored this blog post with contributions from Andrew Williams. Introduction to JasperLoader Malware loaders are playing an increasingly important role in malware distribution. They give adversaries the ability to gain an initial foothold on a system and are...

Vulnerability Spotlight: Multiple vulnerabilities in the Roav A1 Dashcam

Lilith Wyatt of Cisco Talos discovered these vulnerabilities. Executive Summary Cisco Talos is disclosing multiple vulnerabilities in the Anker Roav A1 Dashcam and the Novatek NT9665X chipset. The Roav A1 Dashcam by Anker is a dashboard camera that allows users to connect using the Roav app for...

Threat Roundup for November 29 to December 6

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Nov. 29 and Dec. 6. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics,...

Threat Roundup for May 31 to June 7

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between May 31 and June 07. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics,...

Microsoft Patches Out-of-Band Internet Explorer Scripting Engine Vulnerability After Exploitation Detected in the Wild

Overview Microsoft released an out-of-band OOB patch on Wednesday related to a vulnerability in the scripting engine of Internet Explorer. This particular vulnerability is believed to be actively exploited in the wild and should be patched immediately. This remote code execution bug lies in the w...

Microsoft Patch Tuesday — March 2020: Vulnerability disclosures and Snort coverage

By Jon Munshaw and Vitor Ventura. Update March 12, 2020: Microsoft released an out-of-band patch for CVE-2020-0796, a code execution vulnerability SMB client and server for Windows. An unauthenticated attacker could exploit this vulnerability to execute remote code. Snort rules 53425 - 53428...

Vulnerability Spotlight: Adobe Acrobat Reader DC Document ID Remote Code Execution Vulnerability

Discovered by Aleksandar Nikolic of Cisco Talos Overview Today, Talos is releasing details of a new vulnerability within Adobe Acrobat Reader DC. Adobe Acrobat Reader is the most popular and most feature-rich PDF reader. It has a big user base, is usually a default PDF reader on systems and...

Microsoft Patch Tuesday - December 2017

Today, Microsoft has released its monthly set of security advisories for vulnerabilities that have been identified and addressed in various products. This month's advisory release addresses 34 new vulnerabilities with 21 of them rated critical and 13 of them rated important. These vulnerabilities...

Microsoft Patch Tuesday — Jan. 2020: Vulnerability disclosures and Snort coverage

By Jon Munshaw. Updated January 15th: Added an Advanced Custom Detection ACD signature for AMP that can be used to detect exploitation of CVE-2020-0601 by spoofing certificates masquerading as a Microsoft ECC Code Signing Certificate Authority. Microsoft released its monthly security update today...

Threat Roundup for December 13 to December 20

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Dec. 13 and Dec. 20. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics...

Vulnerability Spotlight: Multiple Vulnerabilities in CUJO Smart Firewall, Das U-Boot, OCTEON SDK, Webroot BrightCloud

Claudio Bozzato of Cisco Talos discovered these vulnerabilities. Executive summary CUJO AI produces the CUJO Smart Firewall, a device that provides protection to home networks against a myriad of threats such as malware, phishing websites and hacking attempts. Cisco Talos recently discovered 11...

Threat Roundup for February 7 to February 14

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Feb. 7 and Feb. 14. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics,...

Threat Source newsletter (Jan. 16, 2019)

Newsletter compiled by Jon Munshaw. Welcome to this week’s Threat Source newsletter — the perfect place to get caught up on all things Talos from the past week. This wasn’t your average Patch Tuesday. Microsoft’s monthly security update was notable for a few reasons. For starters, it’s really tim...

Talos DEFCON badge build instructions and use

By Patrick Mullen. We want to thank everyone who stopped by the Cisco Talos booth at DEFCON's Blue Team Village earlier this month. We handed out these badges at our area where we had Snort rules challenges, reverse-Capture the Flag and recruiters ready to answer attendees' career advice question...

Threat Advisory: Microsoft warns of actively exploited vulnerabilities in Exchange Server

Cisco Talos has released new coverage to detect and prevent the exploitation of two recently disclosed vulnerabilities collectively referred to as "ProxyNotShell," affecting Microsoft Exchange Servers 2013, 2016 and 2019. One of these vulnerabilities could allow an attacker to execute remote code...

Threat Roundup for May 24 to May 31

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between May 24 and May 31. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics,...

Vulnerability Spotlight: Multiple Vulnerabilities in Samsung SmartThings Hub

These vulnerabilities were discovered by Claudio Bozzato of Cisco Talos. Executive Summary Cisco Talos recently discovered several vulnerabilities present within the firmware of the Samsung SmartThings Hub. In accordance with our coordinated disclosure policy, Cisco Talos has worked with Samsung ...

Vulnerability Spotlight: Natus NeuroWorks Multiple Vulnerabilities

Vulnerabilities discovered by Cory Duplantis from Talos Overview Talos has discovered multiple vulnerabilities in Natus NeuroWorks software. This software is used in the Natus Xltek EEG medical products from Natus Medical Inc. The vulnerable devices contain an ethernet connection for data...

New Re2PCAP tool speeds up PCAP process for Snort rules

By Amit Raut We often joke that for SNORT® rule development, you have to live by the saying “PCAP or it didn’t happen.” PCAP files are very important for Snort rule development, and a new tool from Cisco Talos called “Re2Pcap” allows users to generate a PCAP file in seconds just from a raw HTTP...

Microsoft Patch Tuesday - June 2018

Executive Summary Microsoft has released its monthly set of security advisories for vulnerabilities that have been identified and addressed in various products. This month's advisory release addresses 50 flaws, with 11 of them rated "critical," and 39 rated "important." These vulnerabilities impa...

Threat Roundup for March 29 to April 5

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between March 29 and April 05. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral...

Vulnerability Spotlight: Two bugs in KCodes NetUSB affect some NETGEAR routers

Dave McDaniel of Cisco Talos discovered these vulnerabilities. Executive summary KCodes’ NetUSB kernel module contains two vulnerabilities that could allow an attacker to inappropriately access information on some NETGEAR wireless routers. Specific models of these routers utilize the kernel modul...

Threat Roundup for April 5 to April 12

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between April 05 and April 12. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral...

Microsoft Patch Tuesday — Feb. 2020: Vulnerability disclosures and Snort coverage

By Jon Munshaw. Microsoft released its monthly security update today, disclosing vulnerabilities across many of its products and releasing corresponding updates. This month's Patch Tuesday covers 98 vulnerabilities, 12 of which are considered critical and 84 that are considered important. There a...

Threat Source newsletter (June 20, 2019)

Newsletter compiled by Jonathan Munshaw. Welcome to this week’s Threat Source newsletter — the perfect place to get caught up on all things Talos from the past week. This week, we disclosed two vulnerabilities in KCodes’ NetUSB kernel module contains that could allow an attacker to inappropriatel...

Vulnerability Spotlight: TALOS-2018-0545 - Microsoft wimgapi LoadIntegrityInfo Code Execution Vulnerability

Vulnerabilities discovered by Marcin Noga from Talos Overview Talos is disclosing a remote code execution vulnerability in the Microsoft wimgapi library. The wimgapi DLL is used in the Microsoft Windows operating system to perform operations on Windows Imaging Format WIM files. WIM is a file-base...

Microsoft Patch Tuesday — Oct. 2019: Vulnerability disclosures and Snort coverage

By Jon Munshaw. Microsoft released its monthly security update today, disclosing a variety of vulnerabilities in several of its products. The latest Patch Tuesday discloses 60 vulnerabilities, nine of which are considered "critical," with the rest being deemed "important." This month’s security...

Best practices for staying safe online during the holiday shopping season

By Jon Munshaw. This holiday shopping season, the basics of avoiding a malware infection boils down to: If it sounds too good to be true, it probably is. While sometimes retailers do give out small-dollar gift cards, that $500 discount on a new iPhone is probably not real. If it is a scam, it wil...

Microsoft Patch Tuesday - March 2018

Microsoft Patch Tuesday - March 2018 Today, Microsoft has released its monthly set of security advisories for vulnerabilities that have been identified and addressed in various products. This month's advisory release addresses 74 new vulnerabilities, with 14 of them rated critical and 59 of them...

Custom dropper hide and seek

Executive summary Most users assume they are safe when surfing the web on a daily basis. But information-stealing malware can operate in the background of infected systems, looking to steal users' passwords, track their habits online and hijack personal information. Cisco Talos has monitored...

Threat Roundup for April 26 to May 3

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between April 26 and May 03. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics...

Vulnerability Spotlight: Multiple vulnerabilities in YouPHPTube

Yuri Kramarz of Security Advisory EMEAR discovered these vulnerabilities. Post by Jon Munshaw. YouPHPTube contains multiple vulnerabilities that could allow an attacker to carry out a variety of malicious activities. Specially crafted, attacker-created web requests can allow an attacker to inject...

Only one critical issue disclosed as part of Microsoft Patch Tuesday

Microsoft released its monthly security update Tuesday, disclosing 49 vulnerabilities across its suite of products and software. Of those there is only one critical vulnerability. Every other security issues disclosed this month is considered "important." The lone critical security issue is...

Vulnerability Spotlight: Dovecot out-of-bounds Read Vulnerability

Overview Today, Cisco Talos is disclosing a single out-of-bounds read vulnerability in the Dovecot IMAP server. Dovecot is a popular internet message access protocol, or IMAP, server with performance and security-oriented design. It is a popular choice for robust email servers. In accordance with...