capa: Automatically Identify Malware Capabilities

capa is the FLARE team’s newest open-source tool for analyzing malicious programs. Our tool provides a framework for the community to encode, recognize, and share behaviors that we’ve seen in malware. Regardless of your background, when you use capa, you invoke decades of cumulative reverse...

Malicious Activity Targeting COVID-19 Research, Vaccine Development

In response to malicious activity targeting COVID-19 research and vaccine development in the United States, United Kingdom UK, and Canada, the Cybersecurity and Infrastructure Security Agency CISA, UK’s National Cyber Security Centre NCSC, Canada’s Communications Security Establishment CSE, and t...

X64Dbg - An Open-Source X64/X32 Debugger For Windows

An open-source binary debugger for Windows, aimed at malware analysis and reverse engineering of executables you do not have the source code for. There are many features available and a comprehensive plugin system to add your own. You can find more information on the blog! Screenshots Installatio...

EulerOS Virtualization 3.0.6.0 : gdb (EulerOS-SA-2020-1788)

According to the version of the gdb package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerability : - GNU Debugger GDB 8.0 and earlier fails to detect a negative length field in a DWARF section. A malformed section in an ELF binary or a...

Researcher Spots New Malware Claimed to be 'Tailored for Air‑Gapped Networks'

A cybersecurity researcher at ESET today published an analysis of a new piece of malware, a sample of which they spotted on the Virustotal malware scanning engine and believe the hacker behind it is likely interested in some high-value computers protected behind air‑gapped networks. Dubbed 'Ramsa...

North Korean Malicious Cyber Activity

The Cybersecurity and Infrastructure Security Agency CISA, the Federal Bureau of Investigation FBI, and the Department of Defense DoD have identified three malware variants—COPPERHEDGE, TAINTEDSCRIBE, and PEBBLEDASH—used by the North Korean government. In addition, U.S. Cyber Command has released...

Analyzing Dark Crystal RAT, a C# Backdoor

The FireEye Mandiant Threat Intelligence Team helps protect our customers by tracking cyber attackers and the malware they use. The FLARE Team helps augment our threat intelligence by reverse engineering malware samples. Recently, FLARE worked on a new C variant of Dark Crystal RAT DCRat that the...

What does it take to become a good reverse engineer?

How much money and effort does it take to become a good reverse engineer? Do you even need to be one? There are no universally acceptable answers to these questions. Software reverse engineering RE is not a science but a skillset combined with specific knowledge and backed by a lot of experience...

Inhale - A Malware Analysis And Classification Tool

Inhale is a malware analysis and classification tool that is capable of automating and scaling many static analysis operations. This is the beta release version, for testing purposes, feedback, and community development. Background Inhale started as a series of small scripts that I used when...

Thinking Outside the Bochs: Code Grafting to Unpack Malware in Emulation

This blog post continues the FLARE script series with a discussion of patching IDA Pro database files IDBs to interactively emulate code. While the fastest way to analyze or unpack malware is often to run it, malware won’t always successfully execute in a VM. I use IDA Pro’s Bochs integration in...

FakeNet Genie: Improving Dynamic Malware Analysis with Cheat Codes for FakeNet-NG

As developers of the network simulation tool FakeNet-NG, reverse engineers on the FireEye FLARE team, and malware analysis instructors, we get to see how different analysts use FakeNet-NG and the challenges they face. We have learned that FakeNet-NG provides many useful features and solutions of...

It’s Your Money and They Want It Now — The Cycle of Adversary Pursuit

When we discover new intrusions, we ask ourselves questions that will help us understand the totality of the activity set. How common is this activity? Is there anything unique or special about this malware or campaign? What is new and what is old in terms of TTPs or infrastructure? Is this being...

Cybersecurity Research During the Coronavirus Outbreak and After

Virus outbreaks are always gruesome: people, animals or computer systems get infected within a short time. Of course, viruses spreading across our physical world always take priority over the virtual world. Nevertheless, everyone should keep doing their job, which includes all kinds of malware...

North Korean Malicious Cyber Activity

The Cybersecurity and Infrastructure Security Agency CISA, the Federal Bureau of Investigation FBI, and the Department of Defense DoD have identified the following malware variants used by the North Korean government. The U.S. Government refers to malicious cyber activity by the North Korean...

picoCTF-2019-writeups

The repository is a collection of write-ups for the picoCTF 2019 challenge. The write-ups cover various challenges, including general skills, web exploitation, and reverse engineering. The challenges involve solving problems such as decoding messages, exploiting vulnerabilities, and reversing...

CSI Evidence Indicators for Targeted Ransomware Attacks

ARCHIVED STORY CSI: Evidence Indicators for Targeted Ransomware Attacks – Part I By Trellix · Febraury 12, 2020 For many years now I have been working and teaching in the field of digital forensics, malware analysis and threat intelligence. During one of the classes we always talk about Lockard’s...

CSI Evidence Indicators for Targeted Ransomware Attacks

ARCHIVED STORY CSI: Evidence Indicators for Targeted Ransomware Attacks – Part I By Trellix · Febraury 12, 2020 For many years now I have been working and teaching in the field of digital forensics, malware analysis and threat intelligence. During one of the classes we always talk about Lockard’s...

Emotet Now Hacks Nearby Wi-Fi Networks to Spread Like a Worm

A newly uncovered Emotet malware sample has the ability to spread to insecure Wi-Fi networks that are located nearby to an infected device. If the malware can spread to these nearby Wi-Fi networks, it then attempts to infect devices connected to them — a tactic that can rapidly escalate Emotet’s...

RansomCoin - A DFIR Tool To Extract Cryptocoin Addresses And Other Indicators Of Compromise From Binaries

Extracting metadata and hardcoded Indicators of Compromise from ransomware, in a scalable, efficient, way with cuckoo integrations. Ideally, is it run during cuckoo dynamic analysis, but can also be used for static analysis on large collections of ransomware. Designed to be fast, with low false...

EulerOS 2.0 SP3 : gdb (EulerOS-SA-2019-2584)

According to the version of the gdb packages installed, the EulerOS installation on the remote host is affected by the following vulnerability : - GNU Debugger GDB 8.0 and earlier fails to detect a negative length field in a DWARF section. A malformed section in an ELF binary or a core file can...