Allen-Bradley MicroLogix Series PLC Detection Scanner

The Allen-Bradley MicroLogix Series PLCs are used primarily in industrial settings for automation and control processes. These programmable logic controllers are integral in manufacturing systems, handling tasks such as machine automation and process control. The MicroLogix series is widely implemented in various industries due to its compact size and capability, including models like 1100, 1400, and 1500. They serve a multitude of functions within production environments, providing reliable automation solutions. Companies employing these systems seek to optimize production and reduce manual intervention. The series continues to be a popular choice due to its balance of cost-effectiveness and functional utility.

The detection scanner identifies the presence of Allen-Bradley MicroLogix Series PLCs, specifically looking for model prefixes 1761, 1762, 1763, 1764, and 1766. These models are detected using the EtherNet/IP Common Industrial Protocol (CIP) over the specified network ports. Recognizing these models is crucial for inventory and security management in industrial control systems. The system detects these PLCs by analyzing network traffic for specific vendor IDs related to Rockwell Automation. By pinpointing these devices, organizations can manage their industrial assets more effectively. This detection plays a critical role in maintaining network hygiene and operational security.

The scanner works by sending binary data that prompts a response identifying the targeted Allen-Bradley PLC models. It listens over TCP on port 44818 where these PLCs typically communicate. The binary data checks for predefined hexadecimal sequences that indicate the presence of certain model prefixes. Technical details include reading 200 bytes of data and matching against specific binary patterns characteristic of Allen-Bradley devices. The device identification is facilitated through these unique sequences, which the scanner is programmed to detect. Detecting these sequences allows systems to catalog devices efficiently, thus aiding in risk assessment.

Exploiting the detection of Allen-Bradley MicroLogix Series PLCs could lead to unauthorized inventory audits or reconnaissance attacks. Attackers might use this information to map a network's industrial components, exposing them to potential unauthorized access or industrial sabotage. Although detection itself poses low immediate risk, knowing device types and locations can be the first step in a targeted attack strategy. Network administrators must remain aware of where and how these devices operate to mitigate any illicit attempts. Consequently, understanding what assets exist within a network ensures better shielding against potential threats targeting industrial environments.