Modify Program

Senses

Modify Program

Updated

Jan 06, 2026

Senses

Sense 1

Adversaries may modify or add a program on a controller to affect how it interacts with the physical process, peripheral devices and other hosts on the network. Modification to controller programs can be accomplished using a Program Download in addition to other types of program modification such as online edit and program append. Program modification encompasses the addition and modification of instructions and logic contained in Program Organization Units (POU) (Citation: IEC February 2013) and similar programming elements found on controllers. This can include, for example, adding new functions to a controller, modifying the logic in existing functions and making new calls from one function to another. Some programs may allow an adversary to interact directly with the native API of the controller to take advantage of obscure features or vulnerabilities.

Program modification encompasses the addition and modification of instructions and logic contained in Program Organization Units (POU) (Citation: IEC February 2013) and similar programming elements found on controllers. This can include, for example, adding new functions to a controller, modifying the logic in existing functions and making new calls from one function to another.

Some programs may allow an adversary to interact directly with the native API of the controller to take advantage of obscure features or vulnerabilities.

MITRE ATT&CK (ICS, CTI STIX Data)

Bibliography

MITRE ATT&CK (ICS, CTI STIX Data)
Accessed Jan 06, 2026Quoted
MITRE ATT&CK CTI (STIX bundle)
https://raw.githubusercontent.com/mitre-attack/attack-stix-data/master/ics-attack/ics-attack.json
See repository LICENSE.txt for ATT&CK terms: non-exclusive royalty-free license; reproduce MITRE copyright + license in copies. Verify requirements before publishing quoted text.
Source: MITRE ATT&CK (attack-stix-data).