BadOutlook : Malicious Outlook Reader

BadOutlook is a simple PoC which leverages the Outlook Application Interface (COM Interface) to execute shellcode on a system based on a specific trigger subject line.

By utilizing the Microsoft.Office.Interop.Outlook namespace, developers can represent the entire Outlook Application (or at least according to Microsoft). This means that the new application should be able to do anything from reading emails (yes this also includes archives, trash, etc.) to sending them out.

Building on the millions of pre-existing C# shellcode loaders, an email with a trigger subject line and base64 encoded shellcode in the body can be sent to the host with a weaponized instance of this program. The program will then read the email and execute the shellcode embedded in the email.

Additional Notes

  • This can be used to build an Entire C2 Framework that relies on E-Mails as a mean of communication (Where the Implant never speaks to the internet directly)
  • There does appear to be a security warning which informs the user of an application attempting to access Outlook data
    • This can be turned off with when an administrator modifies the registry as shown here.
    • Minor testing showed that Injecting this process into an Outlook client does not cause the alert to appear (Additional testing would be much appriciated <3)

PoC

  • Application Polling Outlook for Trigger
  • Trigger Email With Shellcode Creation
  • Email Recived By Outlook Client
  • Shellcode Execution by BadOutlook Application
R K

Recent Posts

Playwright-MCP : A Powerful Tool For Browser Automation

Playwright-MCP (Model Context Protocol) is a cutting-edge tool designed to bridge the gap between AI…

13 hours ago

JBDev : A Tool For Jailbreak And TrollStore Development

JBDev is a specialized development tool designed to streamline the creation and debugging of jailbreak…

1 day ago

Kereva LLM Code Scanner : A Revolutionary Tool For Python Applications Using LLMs

The Kereva LLM Code Scanner is an innovative static analysis tool tailored for Python applications…

1 day ago

Nuclei-Templates-Labs : A Hands-On Security Testing Playground

Nuclei-Templates-Labs is a dynamic and comprehensive repository designed for security researchers, learners, and organizations to…

2 days ago

SSH-Stealer : The Stealthy Threat Of Advanced Credential Theft

SSH-Stealer and RunAs-Stealer are malicious tools designed to stealthily harvest SSH credentials, enabling attackers to…

2 days ago

ollvm-unflattener : A Tool For Reversing Control Flow Flattening In OLLVM

Control flow flattening is a common obfuscation technique used by OLLVM (Obfuscator-LLVM) to transform executable…

2 days ago