Malicious code in @nolimit-x/win32-x64 (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 343787b335da015be56f49d118534c54bf81abab9e53b40bec0114d23bcc95c7 Package ships a single 8.1 MB Windows PE nolimit-core.exe as its main entry with only the description 'nolimit-x native binary for Windows x64' — no...

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...

FLOSS - FireEye Labs Obfuscated String Solver (Automatically extract obfuscated strings from malware)

Rather than heavily protecting backdoors with hardcore packers, many malware authors evade heuristic detections by obfuscating only key portions of an executable. Often, these portions are strings and resources used to configure domains, files, and other artifacts of an infection. These key...

Using ILSpy to analyze a small adware file

My curiosity was triggered when the telemetry of our heuristic scanner started showing a multitude of reports about a small file called grandfather.exe, so I went out to grab a copy and have a look at it. As you can probably tell from some of the detection names at Virustotal, this is a MSIL...

Automatically Extracting Obfuscated Strings from Malware using the FireEye Labs Obfuscated String Solver (FLOSS)

Introduction and Motivation Have you ever run strings.exe on a malware executable and its output provided you with IP addresses, file names, registry keys, and other indicators of compromise IOCs? Great! No need to run further analysis or hire expensive experts to determine if a file is malicious...

Automatically Extracting Obfuscated Strings from Malware using the FireEye Labs Obfuscated String Solver (FLOSS)

Introduction and Motivation Have you ever run strings.exe on a malware executable and its output provided you with IP addresses, file names, registry keys, and other indicators of compromise IOCs? Great! No need to run further analysis or hire expensive experts to determine if a file is malicious...

FireEye MPS JAR analyzer command execution

Added: 12/28/2015 BID: 78809 Background The FireEye Malware Protection System MPS detects and eliminates malware found on file shares, web downloads, and e-mail. Problem A vulnerability in the Java Archive analysis tool could allow command execution when the tool analyzes a specially crafted JAR...

FireEye MPS JAR analyzer command execution

Added: 12/28/2015 BID: 78809 Background The FireEye Malware Protection System MPS detects and eliminates malware found on file shares, web downloads, and e-mail. Problem A vulnerability in the Java Archive analysis tool could allow command execution when the tool analyzes a specially crafted JAR...

FireEye MPS JAR analyzer command execution

Added: 12/28/2015 BID: 78809 Background The FireEye Malware Protection System MPS detects and eliminates malware found on file shares, web downloads, and e-mail. Problem A vulnerability in the Java Archive analysis tool could allow command execution when the tool analyzes a specially crafted JAR...