Microsoft Temporarily Disables MSIX App Installers to Prevent Malware Abuse

Microsoft last week announced that it's temporarily disabling the MSIX ms-appinstaller protocol handler in Windows following evidence that a security vulnerability in the installer component was exploited by threat actors to deliver malware such as Emotet, TrickBot, and Bazaloader. MSIX, based on...

TrickBot Crashes Security Researchers’ Browsers in Latest Upgrade

Trojan titan TrickBot has added a striking anti-debugging feature that detects security analysis and crashes researcher browsers before its malicious code can be analyzed. The new anti-debugging feature was discovered by Security Intelligence analysts with IBM, who reported the emergence of a...

TrickBot Malware Using New Techniques to Evade Web Injection Attacks

The cybercrime operators behind the notorious TrickBot malware have once again upped the ante by fine-tuning its techniques by adding multiple layers of defense to slip past antimalware products. "As part of that escalation, malware injections have been fitted with added protection to keep...

Emotet Now Using Unconventional IP Address Formats to Evade Detection

Social engineering campaigns involving the deployment of the Emotet malware botnet have been observed using "unconventional" IP address formats for the first time in a bid to sidestep detection by security solutions. This involves the use of hexadecimal and octal representations of the IP address...

Emotet Spam Abuses Unconventional IP Address Formats to Spread Malware

We found waves of Emotet spam campaigns using unconventional IP addresses to evade detection...

Emotet Re-emerges with Help from TrickBot

Emotet has recently reemerged after being taken down less than a year ago by global law enforcement as coordinated by Europol and Eurojust. The takedown was achieved after law enforcement compromised a command-and-control system, and then pushed a specially crafted update to Emotet agents that...

Conti Ransomware Gang Has Full Log4Shell Attack Chain

The Conti ransomware gang, which last week became the first professional crimeware outfit to adopt and weaponize the Log4Shell vulnerability, has now built up a holistic attack chain. The sophisticated Russia-based Conti group – which Palo Alto Networks has called “one of the most ruthless” of...

Microsoft released patch for actively exploited spoofing vulnerability

THREAT LEVEL: Amber. For a detailed advisory, download the pdf file here. Microsoft AppX has a spoofing vulnerability that has been assigned CVE-2021-43890. Attackers are taking advantage of this critical vulnerability by deploying well-known malwares such as Emotet, Trickbot, and Bazaloader. Thi...

CVE-2021-43890

We have investigated reports of a spoofing vulnerability in AppX installer that affects Microsoft Windows. Microsoft is aware of attacks that attempt to exploit this vulnerability by using specially crafted packages that include the malware family known as Emotet/Trickbot/Bazaloader. An attacker...

CVE-2021-43890

We have investigated reports of a spoofing vulnerability in AppX installer that affects Microsoft Windows. Microsoft is aware of attacks that attempt to exploit this vulnerability by using specially crafted packages that include the malware family known as Emotet/Trickbot/Bazaloader. An attacker...

CVE-2021-43890

We have investigated reports of a spoofing vulnerability in AppX installer that affects Microsoft Windows. Microsoft is aware of attacks that attempt to exploit this vulnerability by using specially crafted packages that include the malware family known as Emotet/Trickbot/Bazaloader. An attacker...

Spoofing

We have investigated reports of a spoofing vulnerability in AppX installer that affects Microsoft Windows. Microsoft is aware of attacks that attempt to exploit this vulnerability by using specially crafted packages that include the malware family known as Emotet/Trickbot/Bazaloader. An attacker...

Microsoft Issues Windows Update to Patch 0-Day Used to Spread Emotet Malware

Microsoft has rolled out Patch Tuesday updates to address multiple security vulnerabilities in Windows and other software, including one actively exploited flaw that's being abused to deliver Emotet, TrickBot, or Bazaloader malware payloads. The latest monthly release for December fixes a total o...

Actively Exploited Microsoft Zero-Day Allows App Spoofing, Malware Delivery

Microsoft has addressed a zero-day vulnerability that was exploited in the wild to deliver Emotet, Trickbot and more in the form of fake applications. The patch came as part of the computing giant’s December Patch Tuesday update, which included a total of 67 fixes for security vulnerabilities. Th...

Windows AppX Installer Spoofing Vulnerability

We have investigated reports of a spoofing vulnerability in AppX installer that affects Microsoft Windows. Microsoft is aware of attacks that attempt to exploit this vulnerability by using specially crafted packages that include the malware family known as Emotet/Trickbot/Bazaloader. An attacker...

Emotet’s Behavior & Spread Are Omens of Ransomware Attacks

The rapid spread of Emotet via TrickBot and its behavior since the malware resurfaced last month could signal that a spate of ransomware attacks are on the way, spurring researchers to warn organizations to buckle up and get ready. In mid-November, a team of researchers from Cryptolaemus, G DATA...

140,000 Reasons Why Emotet is Piggybacking on TrickBot in its Return from the Dead

The operators of TrickBot malware have infected an estimated 140,000 victims across 149 countries a little over a year after attempts were to dismantle its infrastructure, even as the advanced Trojan is fast becoming an entry point for Emotet, another botnet that was taken down at the start of...

Emotet’s back and it isn’t wasting any time

Emotet is one of the best known, and most dangerous, malware threats of the past several years. On several occasions it appeared to take an early retirement, but it has always came back. In January of this year, a global police operation dismantled Emotets botnet. Law enforcement then used their...

Talos Takes Ep. #79: Emotet's back with the worst type of holiday present

By Jon Munshaw. The latest episode of Talos Takes is available now. Download this episode and subscribe to Talos Takes using the buttons below, or visit the Talos Takes page. Emotet is back, and it brought the worst possible holiday present just in time for peak spam season, too!. We... This is...

Emotet being spread via malicious Windows App Installer packages

As reported by Cryptolaemus on Twitter, and demonstrated step by step by BleepingComputer, Emotet is now being distributed through malicious Windows App Installer packages that pretend to be Adobe PDF software. How does the attack work? To understand what Microsoft is supposed to do about this...