Malicious Package

Overview Sys.Forms.26 is a malicious package. This package adopts typosquatting techniques and attempts to trick users into downloading it. It contains a PowerShell script that will execute upon installation and trigger a download of a 2nd stage payload, which can be remotely executed. Indicators...

Malicious Package

Overview Avalon-Net-Core is a malicious package. This package adopts typosquatting techniques and attempts to trick users into downloading it. It contains a PowerShell script that will execute upon installation and trigger a download of a 2nd stage payload, which can be remotely executed...

Malicious Package

Overview Asip.Net.Core is a malicious package. This package adopts typosquatting techniques and attempts to trick users into downloading it. It contains a PowerShell script that will execute upon installation and trigger a download of a 2nd stage payload, which can be remotely executed. Indicator...

Malicious Package

Overview Azeta.API is a malicious package. This package adopts typosquatting techniques and attempts to trick users into downloading it. It contains a PowerShell script that will execute upon installation and trigger a download of a 2nd stage payload, which can be remotely executed. Indicators of...

Rogue NuGet Packages Infect .NET Developers with Crypto-Stealing Malware

The NuGet repository is the target of a new "sophisticated and highly-malicious attack" aiming to infect .NET developer systems with cryptocurrency stealer malware. The 13 rogue packages, which were downloaded more than 160,000 times over the past month, have since been taken down. "The packages...

BitRAT Now Sharing Sensitive Bank Data as a Lure

Introduction In June of 2022 Qualys Threat Research Unit TRU wrote an in-depth report on Redline, a commercial off the shelf infostealer that spreads via fake cracked software hosted on Discord’s content delivery network. Since then, we have continued to track similar threats to identify their...

Too Log; Didn't Read — Unknown Actor Using CLFS Log Files for Stealth

The Mandiant Advanced Practices team recently discovered a new malware family we have named PRIVATELOG and its installer, STASHLOG. In this post, we will share a novel and especially interesting technique the samples use to hide data, along with detailed analysis of both files that was performed...

Buer Malware Tool Rewritten in E-Z Rust Language

A variant of the Buer malware, which is being distributed in emails disguised as DHL support shipping notices, comes with a fresh code rewrite in the popular Rust language and looks like it may be in the process of prepping for rental to other cybercrooks. Join Threatpost for “Fortifying Your...

Lazarus APT Hackers are now using BMP images to hide RAT malware

A spear-phishing attack operated by a North Korean threat actor targeting its southern counterpart has been found to conceal its malicious code within a bitmap .BMP image file to drop a remote access trojan RAT capable of stealing sensitive information. Attributing the attack to the Lazarus Group...

CB TAU Threat Intelligence Notification: Emotet Utilizing WMI to Launch PowerShell Encoded Code

Carbon Black recently learned that a customer had received a malicious email, which was written in German and was attached with a password-protected zip file that contained a malicious document file. This phishing email belongs to the recent Emotet campaign. However, what makes this malware uniqu...

Threat Analysis: Recent Attack Technique Leveraging cmd.exe and PowerShell Demonstrates How Attackers Are Using Trusted Microsoft Applications for Malicious Behavior

An attack leveraging cmd.exe and PowerShell was recently investigated by Cb ThreatSight analysts. Our initial investigation discovered that a batch file was executed on the targeted system. This batch file then invoked PowerShell with a base64 encoded command. Decoding the command revealed a seri...

Threat Analysis: Carbon Black Threat Research Dissects PNG Dropper

UPDATE 8/14/17: After posting the original analysis, the Carbon Black Threat Research team received numerous requests for the tools to extract the second stage payload from the initial PNGdropper file. As a result, the source code and compiled binaries are being made public and are posted to the...