PortEx - Java Library To Analyse Portable Executable Files With A Special Focus On Malware Analysis And PE Malformation Robustness

PortEx is a Java library for static malware analysis of Portable Executable files. Its focus is on PE malformation robustness, and anomaly detection. PortEx is written in Java and Scala, and targeted at Java applications.

Features

Reading header information from: MSDOS Header, COFF File Header, Optional Header, Section Table
Reading PE structures: Imports, Resources, Exports, Debug Directory, Relocations, Delay Load Imports, Bound Imports
Dumping of sections, resources, overlay, embedded ZIP, JAR or .class files
Scanning for file format anomalies, including structural anomalies, deprecated, reserved, wrong or non-default values.
Visualize PE file structure, local entropies and byteplot of the file with variable colors and sizes
Calculate Shannon Entropy and Chi Squared for files and sections
Calculate ImpHash and Rich and RichPV hash values for files and sections
Parse RichHeader and verify checksum
Calculate and verify Optional Header checksum
Scan for PEiD signatures, internal file type signatures or your own signature database
Scan for Jar to EXE wrapper (e.g. exe4j, jsmooth, jar2exe, launch4j)
Extract Unicode and ASCII strings contained in the file
Extraction and conversion of .ICO files from icons in the resource section
Extraction of version information and manifest from the file
Reading .NET metadata and streams (Alpha)

For more information have a look at PortEx Wiki and the Documentation

PortexAnalyzer CLI and GUI

PortexAnalyzer CLI is a command line tool that runs the library PortEx under the hood. If you are looking for a readily compiled command line PE scanner to analyse files with it, download it from here PortexAnalyzer.jar

The GUI version is available here: PortexAnalyzerGUI

Using PortEx

Including PortEx to a Maven Project

You can include PortEx to your project by adding the following Maven dependency:

<dependency>
   <groupId>com.github.katjahahn</groupId>
   <artifactId>portex_2.12</artifactId>
   <version>4.0.0</version>
</dependency>

To use a local build, add the library as follows:

<dependency>
   <groupId>com.github.katjahahn</groupId>
   <artifactId>portex_2.12</artifactId>
   <version>4.0.0</version>
   <scope>system</scope>
   <systemPath>$PORTEXDIR/target/scala-2.12/portex_2.12-4.0.0.jar</systemPath>
</dependency>

Including PortEx to an SBT project

Add the dependency as follows in your build.sbt

libraryDependencies += "com.github.katjahahn" % "portex_2.12" % "4.0.0"

Building PortEx

Requirements

PortEx is build with sbt

Compile and Build With sbt

To simply compile the project invoke:

To create a jar:

To compile a fat jar that can be used as command line tool, type:

Create Eclipse Project

You can create an eclipse project by using the sbteclipse plugin. Add the following line to project/plugins.sbt:

addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.4.0")

Generate the project files for Eclipse:

Import the project to Eclipse via the Import Wizard.

Donations

I develop PortEx and PortexAnalyzer as a hobby in my freetime. If you like it, please consider buying me a coffee: https://ko-fi.com/struppigel

Author

Karsten Hahn

Twitter: @Struppigel

Mastodon: [email protected]

Youtube: MalwareAnalysisForHedgehogs