OverwriteMode – A setting that defines whether existing files should be overwritten with the extracted files.

Environment variables can be used to dynamically specify the destination folder. This folder will be created if it does not exist.

InstallPath –The path to the folder that the EXE will be extracted to.

7z archive created in step one and should include “.exe”.

EXPLOIT_EXE = This is the file name of the EXE stored in the.

fm5 = This specifies what message will be displayed for five seconds before automatically closing.

hidcon = This will run the specified program in a hidden console window.

nowait = This indicates the self-extractor will do all steps without pausing.

RunProgram – Details about the executable including:.

(To create a new line, the escape sequence “ ” can be used.)

BeginPrompt – The initial prompt presented to the user.

Title –The title of the window that is presented to the user.

The text in all caps in the configuration file must be replaced with the relevant information.

The variables from the configuration file are explained below.

Open Notepad and add the following configuration file:.

Create the configuration file to customize the self-extraction EXE:.

Download the latest stable version of the 7zSD module.

However, attackers must perform the following steps prior to delivering the payload. When attackers attempt to access a company’s network using a 7zSD, 7-Zip does not have to be installed on the remote system. Attackers can use this as part of a social engineering campaign with the goal of convincing users that the executable is a legitimate, company-sponsored program. 7zSD also includes features to provide the user with prompts and to automatically launch a program contained in the 7-Zip archive using a hidden console. 7-Zip Self-Extractor ModuleĪ 7-Zip self-extractor module (7zSD) creates an executable that will extract the 7-Zip file without having 7-Zip installed. This post details how a 7-Zip module can be used in social engineering to conceal malware known as a Trojan in order to gain access to a remote system. Attackers use many methods to convince users to follow a set of instructions that will compromise and give access to a user’s workstation. Social engineering is a popular vector for attackers to gain initial access to a company’s network.

7z setup sfx