Adversaries may attempt to infect project files with malicious code. These project files may consist of objects, program organization units, variables such as tags, documentation, and other configurations needed for PLC programs to function.(Citation: Beckhoff) Using built in functions of the engineering software, adversaries may be able to download an infected program to a PLC in the operating environment enabling further [Execution](https://attack.mitre.org/tactics/TA0104) and [Persistence](https://attack.mitre.org/tactics/TA0110) techniques.(Citation: PLCdev) Adversaries may export their own code into project files with conditions to execute at specific intervals.(Citation: Nicolas Falliere, Liam O Murchu, Eric Chien February 2011) Malicious programs allow adversaries control of all aspects of the process enabled by the PLC. Once the project file is downloaded to a PLC the workstation device may be disconnected with the infected project file still executing.(Citation: PLCdev)

Subissues

Issuelinks
Summary Description
Siemens Project File Format Adversaries may infect Siemens PLC project files (i.e., Step 7, WinCC, etc.) to achieve [Execution](https://attack.mitre.org/tactics/TA0104), [Persistence](https://attack.mitre.org/tactics/TA0110), and [Lateral Movement](https://attack.mitre.org/tactics/TA0109) objectives. Adversaries may modify an existing project file or bring their own project files into the environment.(Citation: Nicolas Falliere, Liam O Murchu, Eric Chien February 2011) The ability for an adversary to deploy an infected project file relies on access to a workstation with Siemens PLC programming software installed on it from which a program download can be performed.

Linked Issues

Issuelinks
Linktype Issue
is related to Techniques
is related to Workstation
is blocked by Restrict File and Directory Permissions
is blocked by Detection of Project File Infection
is blocked by Encrypt Sensitive Information
is blocked by Audit
is blocked by Code Signing
Impressum German English