Back in a Bit: Attacker Use of the Windows Background Intelligent Transfer Service
In this blog post we will describe:
How attackers use the Background Intelligent Transfer Service (BITS)
Forensic techniques for detecting attacker activity with data format specifications
Public release of the BitsParser tool
A...
New SUNSHUTTLE Second-Stage Backdoor Uncovered Targeting U.S.-Based Entity; Possible Connection to UNC2452
Executive Summary
In August 2020, a U.S.-based entity uploaded a new backdoor that we have named SUNSHUTTLE to a public malware repository.
SUNSHUTTLE is a second-stage backdoor written in GoLang that...
Detection and Response to Exploitation of Microsoft Exchange Zero-Day Vulnerabilities
Beginning in January 2021, Mandiant Managed Defense observed multiple instances of abuse of Microsoft Exchange Server within at least one client environment. The observed activity included creation of web...
Fuzzing Image Parsing in Windows, Part Two: Uninitialized Memory
Continuing our discussion of image parsing vulnerabilities in Windows, we take a look at a comparatively less popular vulnerability class: uninitialized memory. In this post, we will look at...
So Unchill: Melting UNC2198 ICEDID to Ransomware Operations
Mandiant Advanced Practices (AP) closely tracks the shifting tactics, techniques, and procedures (TTPs) of financially motivated groups who severely disrupt organizations with ransomware. In May 2020, FireEye released a...
Cyber Criminals Exploit Accellion FTA for Data Theft and Extortion
Starting in mid-December 2020, malicious actors that Mandiant tracks as UNC2546 exploited multiple zero-day vulnerabilities in Accellion’s legacy File Transfer Appliance (FTA) to install a newly discovered web shell...
Shining a Light on SolarCity: Practical Exploitation of the X2e IoT Device (Part Two)
In this post, we continue our analysis of the SolarCity ConnectPort X2e Zigbee device (referred to throughout as X2e device). In Part One, we discussed the X2e at a...
Shining a Light on SolarCity: Practical Exploitation of the X2e IoT Device (Part One)
In 2019, Mandiant’s Red Team discovered a series of vulnerabilities present within Digi International’s ConnectPort X2e device, which allows for remote code execution as a privileged user. Specifically, Mandiant’s...
Phishing Campaign Leverages WOFF Obfuscation and Telegram Channels for Communication
FireEye Email Security recently encountered various phishing campaigns, mostly in the Americas and Europe, using source code obfuscation with compromised or bad domains. These domains were masquerading as authentic...
Training Transformers for Cyber Security Tasks: A Case Study on Malicious URL Prediction
Highlights
Perform a case study on using Transformer models to solve cyber security problems
Train a Transformer model to detect malicious URLs under multiple training regimes
Compare our model...
