EUVD-2025-33277

Web Developer for Chrome v0.4.9 contained malicious code that generated a domain via a DGA and fetched a remote script. The fetched script conditionally loaded follow-on modules that performed extensive ad substitution and malvertising, displayed fake “repair” alerts that redirected users to...

CVE-2017-20202 Web Developer for Chrome v0.4.9 Malicious Backdoor Supply Chain Compromise

Web Developer for Chrome v0.4.9 contained malicious code that generated a domain via a DGA and fetched a remote script. The fetched script conditionally loaded follow-on modules that performed extensive ad substitution and malvertising, displayed fake “repair” alerts that redirected users to...

CVE-2017-20202 Web Developer for Chrome v0.4.9 Malicious Backdoor Supply Chain Compromise

Web Developer for Chrome v0.4.9 contained malicious code that generated a domain via a DGA and fetched a remote script. The fetched script conditionally loaded follow-on modules that performed extensive ad substitution and malvertising, displayed fake “repair” alerts that redirected users to...

CVE-2017-20202

Web Developer for Chrome extension v0.4.9 contained malicious code that generated a domain via a domain-generation algorithm (DGA) and fetched a remote script. The script loaded follow-on modules to perform extensive ad substitution and malvertising, displayed fake “repair” alerts redirecting use...

MintsLoader Drops GhostWeaver via Phishing, ClickFix — Uses DGA, TLS for Stealth Attacks

The malware loader known as MintsLoader has been used to deliver a PowerShell-based remote access trojan called GhostWeaver. "MintsLoader operates through a multi-stage infection chain involving obfuscated JavaScript and PowerShell scripts," Recorded Future's Insikt Group said in a report shared...

CoffeeLoader Uses GPU-Based Armoury Packer to Evade EDR and Antivirus Detection

Cybersecurity researchers are calling attention to a new sophisticated malware called CoffeeLoader that's designed to download and execute secondary payloads. The malware, according to Zscaler ThreatLabz, shares behavioral similarities with another known malware loader known as SmokeLoader. "The...

ZLoader Malware Returns With DNS Tunneling to Stealthily Mask C2 Comms

Cybersecurity researchers have discovered a new version of the ZLoader malware that employs a Domain Name System DNS tunnel for command-and-control C2 communications, indicating that the threat actors are continuing to refine the tool after resurfacing a year ago. "Zloader 2.9.4.0 adds notable...

ZLoader Malware Evolves with Anti-Analysis Trick from Zeus Banking Trojan

The authors behind the resurfaced ZLoader malware have added a feature that was originally present in the Zeus banking trojan that it's based on, indicating that it's being actively developed. "The latest version, 2.4.1.0, introduces a feature to prevent execution on machines that differ from the...

Cybercriminals Using Novel DNS Hijacking Technique for Investment Scams

A new DNS threat actor dubbed Savvy Seahorse is leveraging sophisticated techniques to entice targets into fake investment platforms and steal funds. "Savvy Seahorse is a DNS threat actor who convinces victims to create accounts on fake investment platforms, make deposits to a personal account, a...

Brazilian Feds Dismantle Grandoreiro Banking Trojan, Arresting Top Operatives

A Brazilian law enforcement operation has led to the arrest of several Brazilian operators in charge of the Grandoreiro malware. The Federal Police of Brazil said it served five temporary arrest warrants and 13 search and seizure warrants in the states of São Paulo, Santa Catarina, Pará, Goiás, a...

New ZLoader Malware Variant Surfaces with 64-bit Windows Compatibility

Threat hunters have identified a new campaign that delivers the ZLoader malware, resurfacing nearly two years after the botnet's infrastructure was dismantled in April 2022. A new variant of the malware is said to have been in development since September 2023, Zscaler ThreatLabz said in an analys...

Decoy Dog: New Breed of Malware Posing Serious Threats to Enterprise Networks

A deeper analysis of a recently discovered malware called Decoy Dog has revealed that it's a significant upgrade over the Pupy RAT, an open-source remote access trojan it's modeled on. "Decoy Dog has a full suite of powerful, previously unknown capabilities – including the ability to move victims...

New Version of Prometei Botnet Infects Over 10,000 Systems Worldwide

An updated version of a botnet malware called Prometei has infected more than 10,000 systems worldwide since November 2022. The infections are both geographically indiscriminate and opportunistic, with a majority of the victims reported in Brazil, Indonesia, and Turkey. Prometei, first observed i...

Microsoft Disrupts ZLoader Cybercrime Botnet in Global Operation

Microsoft and a consortium of cybersecurity companies took legal and technical steps to disrupt the ZLoader botnet, seizing control of 65 domains that were used to control and communicate with the infected hosts. "ZLoader is made up of computing devices in businesses, hospitals, schools, and home...

Google Play Bitten by Sharkbot Info-stealer ‘AV Solution’

Researchers have found the info-stealing Android malware Sharkbot lurking unsuspected in the depths of the Google Play store under the cover of anti-virus AV solutions. While analyzing suspicious applications on the store, the Check Point Research CPR team found what purported to be genuine AV...

‘DarkWatchman’ RAT Shows Evolution in Fileless Malware

A novel remote access trojan RAT being distributed via a Russian-language spear-phishing campaign is using unique manipulation of Windows Registry to evade most security detections, demonstrating a significant evolution in fileless malware techniques. Dubbed DarkWatchman, the RAT – discovered by...

New Fileless Malware Uses Windows Registry as Storage to Evade Detection

A new JavaScript-based remote access Trojan RAT propagated via a social engineering campaign has been observed employing sneaky "fileless" techniques as part of its detection-evasion methods to elude discovery and analysis. Dubbed DarkWatchman by researchers from Prevailion's Adversarial...

Phorpiex morphs: How a longstanding botnet persists and thrives in the current threat environment

Phorpiex, an enduring botnet known for extortion campaigns and for using old-fashioned worms that spread via removable USB drives and instant messaging apps, began diversifying its infrastructure in recent years to become more resilient and to deliver more dangerous payloads. Today, the Phorphiex...

Phorpiex morphs: How a longstanding botnet persists and thrives in the current threat environment

Phorpiex, an enduring botnet known for extortion campaigns and for using old-fashioned worms that spread via removable USB drives and instant messaging apps, began diversifying its infrastructure in recent years to become more resilient and to deliver more dangerous payloads. Today, the Phorphiex...

What tracking an attacker email infrastructure tells us about persistent cybercriminal operations

From March to December 2020, we tracked segments of a dynamically generated email infrastructure that attackers used to send more than a million emails per month, distributing at least seven distinct malware families in dozens of campaigns using a variety of phishing lures and tactics. These...