Nation-State Actors Go All-In on Mobile Malware

APTs, including a range of nation-state groups operating in China, North Korea, Pakistan and Russia, are shifting their malware development focus to target mobile users for intelligence gathering, financial gain and disruption of national rivals. That’s according to CrowdStrike’s Mobile Threat...

Malware Loader ‘Brushaloader’ Grows More Menacing

The tenacious loader malware called Brushaloader is growing more menacing, showing no signs of abatement despite best efforts by security professionals. First identified in June 2018, the Brushaloader malware is now more pervasive, stealthy and growing in popularity faster than ever before. New...

ViceLeaker Operation: mobile espionage targeting Middle East

In May 2018, we discovered a campaign targeting dozens of mobile Android devices belonging to Israeli citizens. Kaspersky spyware sensors caught the signal of an attack from the device of one of the victims; and a hash of the APK involved Android application was tagged in our sample feed for...

Sliver - Implant Framework

Sliver is a general purpose cross-platform implant framework that supports C2 over Mutual-TLS, HTTPS, and DNS. Implants are dynamically compiled with unique X.509 certificates signed by a per-instance certificate authority generated when you first run the binary. The server, client, and implant a...

Introducing Slackor, a Remote Access Tool Using Slack as a C2 Channel

As a penetration tester at Coalfire Labs, I frequently use exploitation frameworks such as Metasploit or PowerShell Empire to perform post-exploitation actions on compromised endpoints. While anti-virus AV bypass and detection avoidance is often trivial in all but the most mature environments,...

Forget BlueKeep: Beware the GoldBrute

While everyone’s talking about the BlueKeep Mega-Worm, this is not the main monster to fear, according to recent web attack activity. Rather, a researcher is warning that the GoldBrute botnet poses the greatest threat to Windows systems right now. In the past few days, GoldBrute named after the...

Sorpresa! JasperLoader targets Italy with a new bag of tricks

Nick Biasini and Edmund Brumaghin authored this blog post. Executive summary Over the past few months, a new malware loader called JasperLoader has emerged that targets Italy and other European countries with banking trojans such as Gootkit. We recently released a comprehensive analysis of the...

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...

CARBANAK Week Part Four: The CARBANAK Desktop Video Player

Part One, Part Two and Part Three of CARBANAK Week are behind us. In this final blog post, we dive into one of the more interesting tools that is part of the CARBANAK toolset. The CARBANAK authors wrote their own video player and we happened to come across an interesting video capture from CARBAN...

Carbanak Source Code Unveils a Startlingly Complex Malware

A look under the hood of FIN7’s notorious Carbanak backdoor – the result of nearly 500 total hours of analysis across 100,000 lines of code and dozens of binaries – shows that the malware is highly sophisticated – more sophisticated than expected. It’s a Cadillac in a sea of golf carts, if you...

CARBANAK Week Part Two: Continuing the CARBANAK Source Code Analysis

Update April 30: Following the release of our four-part CARBANAK Week blog series, many readers have found places to make the data shared in these posts actionable. We have updated this post to include some of this information. In the previous installment, we wrote about how string hashing was us...

Cobalt Strike. Walkthrough for Red Teamers

What is Cobalt Strike? Raphael Mudge is the creator of Cobalt Strike CS, around 2010 he released a tool titled Armitage, which is described by wikipedia as a graphical cyber-attack management for the Metasploit Project, to put this more bluntly, Armitage is a gui that allows you to easily navigat...

Gustuff banking botnet targets Australia

Vitor Ventura authored this post. Executive summary Cisco Talos has uncovered a new Android-based campaign targeting Australian financial institutions. As the investigation progressed, Talos came to understand that this campaign was associated with the "ChristinaMorrow" text message spam scam...

Meet ‘TajMahal,’ A New and Highly Advanced APT Framework

SINGAPORE – Researchers at Kaspersky Lab have discovered a new, highly sophisticated advanced persistent threat APT framework targeting a single Central Asian diplomatic agency. Malware samples associated with the APT reveal a complex never-before-seen code base, making it extremely hard to detec...

Steganography in the Modern Attack Landscape

Steganography the hiding of data in other content types such as images, videos, network traffic etc. continues to play a role in modern attacks in several forms. Most uses of steganography in malware can be divided into two broad categories: concealing the actual malware contents and concealing t...

CVE-2019-11001

CVE-2019-11001 affects Reolink RLC-410W, C1 Pro, C2 Pro, RLC-422W, and RLC-511W through version 1.0.227. An authenticated admin can use the TestEmail functionality to inject and execute OS commands as root (shell metacharacters in addr1). This is documented in multiple feeds (NVD and Red Hat) and...

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...

CB TAU Threat Intelligence Notification – Recent Emotet Campaign Leverages Phishing, PDFs & Droppers Impersonating Legitimate Applications

This past week, CB ThreatSight analysts were investigating suspicious events in an environment. This customer had installed the CB Defense sensor on a subset of systems in monitor only mode for evaluation. While investigating suspicious events, a CB ThreatSight analyst uncovered a new Emotet...

Threat Roundup for March 22 to March 29

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between March 22 and March 29. 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...

CB Threat Intelligence Notification: Vidar InfoStealer Trojan Aims to Steal Data Before Erasing Itself

Vidar is an info stealer trojan, which was sold under the name Vidar Pro stealer and can be distributed through different campaigns. This malware will perform multiple types of malicious behavior including stealing web browser cookies and history, digital wallets, two-factor authentication data,...