T1659 — Content Injection

# T1659 - Content Injection

## SOC Recommendation
Investigate Content Injection activity in the context of Initial Access/Command and Control: confirm scope, affected host/identity, and whether it matches expected administrative behaviour before deciding this is benign.

## D3FEND Mappings
| D3FEND Technique | Relationship | Practical SOC Action |
|---|---|---|
| Network Traffic Analysis | Detect | Monitor for Network Traffic Analysis indicators relevant to this technique. |

## Investigation Steps
1. Review Defender for Endpoint / Defender XDR alerts and timeline for the affected host or identity.
2. Check Sentinel analytics rules and incidents correlated with this technique.
3. Review Entra ID sign-in and audit logs if the technique involves an identity or cloud resource.

## Evidence to Collect
- Host or resource affected
- Account or identity involved
- Timestamp of the activity
- Related process, file, or network artifact
- Any preceding or follow-on alerts

## Response Actions
| Action | Risk | Automation Safe | Approval Required |
|---|---|---|---|
| Contain the affected host or account | Medium | No | Yes |
| Collect and preserve evidence | Low | Yes | No |

## KQL
```kql
DynatraceSecurityProblems
| where VulnerabilityType == "CODE_LEVEL" and DAVISRiskLevel == "CRITICAL" and Muted == false
| summarize  arg_max(LastUpdatedTimeStamp, *) by SecurityProblemId
```
```kql
DynatraceSecurityProblems
| where VulnerabilityType != "CODE_LEVEL" and DAVISRiskLevel == "CRITICAL"  and Muted == false
| summarize  arg_max(LastUpdatedTimeStamp, *) by SecurityProblemId
```
```kql
DynatraceSecurityProblems
| where DAVISRiskLevel != "CRITICAL"  and Muted == false
| summarize  arg_max(LastUpdatedTimeStamp, *) by SecurityProblemId
```

## Escalation Criteria
- Content Injection activity observed on a privileged account or critical system.
- Activity follows or precedes other suspicious behaviour in the same investigation.
- Automated triage cannot confidently rule out malicious intent.

## False Positive Considerations
- Legitimate administrative or maintenance activity matching this pattern.
- Approved security testing or red team exercise.
- Known benign software producing similar telemetry.

Generated by SOC Response Atlas by Basyrix.

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• /api/techniques/T1659.json
• /api/recommendations/T1659.json
• /api/d3fend/T1659.json
• /api/mappings/T1659.json
• /api/confluence/T1659.md

Example curl:

curl https://atlas.basyrix.com/api/recommendations/T1659.json

Response:

{
  "technique_id": "T1659",
  "name": "Content Injection",
  "priority": "medium",
  "status": "draft",
  "version": "0.1.0",
  "last_reviewed": "2026-07-23",
  "generated_by": "SOC Response Atlas by Basyrix",
  "tactics": [
    "Initial Access",
    "Command and Control"
  ],
  "platforms": [
    "Linux",
    "macOS",
    "Windows"
  ],
  "summary": "Adversaries may gain access and continuously communicate with victims by injecting malicious content into systems through online network traffic...",
  "soc_recommendation": "Investigate Content Injection activity in the context of Initial Access/Command and Control: confirm scope, affected host/identity, and whether it matches expected administrative behaviour before deciding this is benign.",
  "d3fend_mappings": [
    {
      "id": "D3-NTA",
      "name": "Network Traffic Analysis",
      "relationship": "detect",
      "practical_action": "Monitor for Network Traffic Analysis indicators relevant to this technique.",
      "tooling": [
        "Sentinel",
        "Defender for Endpoint"
      ]
    }
  ],
  "investigation_steps": {
    "microsoft": [
      "Review Defender for Endpoint / Defender XDR alerts and timeline for the affected host or identity.",
      "Check Sentinel analytics rules and incidents correlated with this technique.",
      "Review Entra ID sign-in and audit logs if the technique involves an identity or cloud resource."
    ],
    "generic": [
      "Confirm whether the observed content injection activity matches expected administrative or application behaviour.",
      "Identify the host, account, or resource where the activity occurred and its business criticality.",
      "Check for related alerts before and after this activity to reconstruct the broader intrusion timeline.",
      "Real detection reference: \"Dynatrace Application Security - Code-Level runtime vulnerability detection\" -- Detect Code-level runtime vulnerabilities in your environment"
    ]
  },
  "evidence_to_collect": [
    "Host or resource affected",
    "Account or identity involved",
    "Timestamp of the activity",
    "Related process, file, or network artifact",
    "Any preceding or follow-on alerts"
  ],
  "response_actions": [
    {
      "name": "Contain the affected host or account",
      "category": "Containment",
      "risk": "Medium",
      "automation_safe": false,
      "approval_required": true,
      "tool": "Defender for Endpoint / Entra ID",
      "notes": "Requires approval -- confirm malicious intent before isolating a host or disabling an account."
    },
    {
      "name": "Collect and preserve evidence",
      "category": "Investigation",
      "risk": "Low",
      "automation_safe": true,
      "approval_required": false,
      "tool": "Defender for Endpoint",
      "notes": "Safe -- read-only evidence collection."
    }
  ],
  "queries": {
    "kql": [
      {
        "name": "305093b4-0fa2-57bc-bced-caea782a6e9c — Dynatrace Application Security - Code-Level runtime vulnerability detection",
        "description": "Detect Code-level runtime vulnerabilities in your environment (Source: Microsoft's official Azure-Sentinel Detections (MIT licensed).)",
        "query": "DynatraceSecurityProblems\n| where VulnerabilityType == \"CODE_LEVEL\" and DAVISRiskLevel == \"CRITICAL\" and Muted == false\n| summarize  arg_max(LastUpdatedTimeStamp, *) by SecurityProblemId"
      },
      {
        "name": "af99b078-124b-543a-9a50-66ef87c09f6a — Dynatrace Application Security - Third-Party runtime vulnerability detection",
        "description": "Detect Third-Party runtime vulnerabilities in your environment insights by snyk' (Source: Microsoft's official Azure-Sentinel Detections (MIT licensed).)",
        "query": "DynatraceSecurityProblems\n| where VulnerabilityType != \"CODE_LEVEL\" and DAVISRiskLevel == \"CRITICAL\"  and Muted == false\n| summarize  arg_max(LastUpdatedTimeStamp, *) by SecurityProblemId"
      },
      {
        "name": "ff0af873-a2f2-4233-8412-0ef4e00b0156 — Dynatrace Application Security - Non-critical runtime vulnerability detection",
        "description": "Detect runtime vulnerabilities in your environment insights by snyk (Source: Microsoft's official Azure-Sentinel Detections (MIT licensed).)",
        "query": "DynatraceSecurityProblems\n| where DAVISRiskLevel != \"CRITICAL\"  and Muted == false\n| summarize  arg_max(LastUpdatedTimeStamp, *) by SecurityProblemId"
      }
    ],
    "spl": [],
    "esql": []
  },
  "automation": {
    "safe": [
      "Add recommendation as Sentinel incident comment.",
      "Run enrichment queries.",
      "Create ServiceNow SecOps task."
    ],
    "approval_required": [
      "Contain or disable the affected host/account.",
      "Any change to production configuration."
    ]
  },
  "escalation_criteria": [
    "Content Injection activity observed on a privileged account or critical system.",
    "Activity follows or precedes other suspicious behaviour in the same investigation.",
    "Automated triage cannot confidently rule out malicious intent."
  ],
  "false_positive_considerations": [
    "Legitimate administrative or maintenance activity matching this pattern.",
    "Approved security testing or red team exercise.",
    "Known benign software producing similar telemetry."
  ],
  "confluence": {
    "title": "T1659 - Content Injection Response Guidance",
    "labels": [
      "mitre",
      "attack",
      "d3fend",
      "secops",
      "basyrix"
    ],
    "sections": [
      "summary",
      "d3fend_mappings",
      "investigation_steps",
      "response_actions",
      "queries",
      "automation",
      "escalation_criteria",
      "false_positive_considerations"
    ]
  }
}