Atlas / Skills / cyberstrikeus / T0877 Io Image

T0877 Io ImageCAUTION

skills/cyberstrikeus/t0877-io-image

Agent skill by cyberstrikeus · agents · ai hacking · ai penetration testing · Audited 2026-10-18

⚑ Report / re-scan Source ↗

Open-source AI-powered offensive security harness for automated penetration testing.

Verdict

CAUTION

Grade

Trust score

89 /100

Version

18.1

Hosts

—

License

AGPL-3.0

Stars

3,185

Overview

Open-source AI-powered offensive security harness for automated penetration testing.

Read from source at commit eaf7d03223fcOBSERVED · 2026-10-18

What it tells the agent

The instruction file, verbatim from the audited commit — this is the text the model reads, and the surface the audit's instruction layer examines. Quoted here so you can judge it without cloning anything.

---
name: "T0877_io-image"
description: "Adversaries may seek to capture process values related to the inputs and outputs of a PLC."
category: "information-gathering"
version: "18.1"
author: "cyberstrike-official"
tags:
  - mitre-attack
  - ics
  - t0877
  - collection
technique_id: "T0877"
tactic: "collection"
all_tactics:
  - collection
platforms:
  - ICS
mitre_url: "https://attack.mitre.org/techniques/T0877"
tech_stack:
  - ics
cwe_ids:
  - CWE-200
chains_with: []
prerequisites: []
severity_boost: {}
---

# T0877 I/O Image

## High-Level Description

Adversaries may seek to capture process values related to the inputs and outputs of a PLC. During the scan cycle, a PLC reads the status of all inputs and stores them in an image table. The image table is the PLCs internal storage location where values of inputs/outputs for one scan are stored while it executes the user program. After the PLC has solved the entire logic program, it updates the output image table. The contents of this output image table are written to the corresponding output points in I/O Modules.

The Input and Output Image tables described above make up the I/O Image on a PLC. This image is used by the user program instead of directly interacting with physical I/O.

Adversaries may collect the I/O Image state of a PLC by utilizing a devices Native API to access the memory regions directly. The collection of the PLCs I/O state could be used to replace values or inform future stages of an attack.

## Kill Chain Phase

- Collection (TA0100)

**Platforms:** ICS

## What to Check

- [ ] Identify if I/O Image technique is applicable to target ICS environment
- [ ] Check ICS/SCADA systems for indicators of I/O Image
- [ ] Verify mitigations are bypassed or absent (1 known mitigations)
- [ ] Assess detection coverage (1 detection strategies)

## How to Test

### Identify Attack Surface

Determine if the target ICS/SCADA environment is susceptible to I/O Image by examining operational technology systems and network architecture.

### Assess Existing Defenses

Review whether mitigations for T0877 are in place. If defenses are absent or misconfigured, this technique may be exploitable in the ICS environment.

## Remediation Guide

### M0816 Mitigation Limited or Not Effective

This technique may not be effectively mitigated against, consider controls for assets and processes that lead to the use of this technique.

## Detection

### Detection of I/O Image

## Risk Assessment

| Finding                        | Severity | Impact     |
| ------------------------------ | -------- | ---------- |
| I/O Image technique applicable | Low      | Collection |

## CWE Categories

| CWE ID  | Title                             |
| ------- | --------------------------------- |
| CWE-200 | Exposure of Sensitive Information |

## References

- [Nanjundaiah, Vaidyanath](https://www.ezautomation.net/industry-articles/plc-ladder-logic-basics.htm)
- [Spenneberg, Ralf 2016](https://www.blackhat.com/docs/asia-16/materials/asia-16-Spenneberg-PLC-Blaster-A-Worm-Living-Solely-In-The-PLC.pdf)
- [MITRE ATT&CK ICS - T0877](https://attack.mitre.org/techniques/T0877)

Trust audit

CAUTIONgrade B · trust 89/100 Install with care. The audit found things worth knowing before you trust its output.

Layer	What it checks	Result
L0	Provenance & inventory	WARN
L1	Static analysis of the code	NA
L2	Instruction surface (what it tells the agent)	PASS
L3	Class-specific surface	PASS
L4	Behavioural (sandbox)	SKIPPED

What the source does

Filesystem: none-observed
Network: none-observed
Shell: none-observed
Dependencies: pinned
Secrets in source: none-found