T1080 — Taint Shared Content

# T1080 - Taint Shared Content

## SOC Recommendation
Investigate Taint Shared Content activity in the context of Lateral Movement: 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 Resource Access Mediation | Isolate | Apply Network Resource Access Mediation to contain the blast radius once this technique is observed. |
| Decoy Network Resource | Deceive | Deploy Decoy Network Resource to detect and mislead an adversary attempting 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
DeviceEvents
| where TimeGenerated > ago(24h)
| where ActionType has "<tune to T1080>"
```

## Escalation Criteria
- Taint Shared Content 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.

Want to push this directly to Confluence? Upgrade to Basyrix Pro.

• /api/techniques/T1080.json
• /api/recommendations/T1080.json
• /api/d3fend/T1080.json
• /api/mappings/T1080.json
• /api/confluence/T1080.md

Example curl:

curl https://atlas.basyrix.com/api/recommendations/T1080.json

Response:

{
  "technique_id": "T1080",
  "name": "Taint Shared Content",
  "priority": "high",
  "status": "draft",
  "version": "0.1.0",
  "last_reviewed": "2026-07-23",
  "generated_by": "SOC Response Atlas by Basyrix",
  "tactics": [
    "Lateral Movement"
  ],
  "platforms": [
    "Windows",
    "SaaS",
    "Linux",
    "macOS",
    "Office Suite"
  ],
  "summary": "Adversaries may deliver payloads to remote systems by adding content to shared storage locations, such as network drives or internal code repositories. Content stored on network drives or in other shared locations may be tainted by adding malicious programs, scripts, or exploit code to otherwise valid files. Once a user opens the shared tainted content, the malicious portion can be executed to run the adversary's code on a remote system...",
  "soc_recommendation": "Investigate Taint Shared Content activity in the context of Lateral Movement: confirm scope, affected host/identity, and whether it matches expected administrative behaviour before deciding this is benign.",
  "d3fend_mappings": [
    {
      "id": "D3-NRAM",
      "name": "Network Resource Access Mediation",
      "relationship": "isolate",
      "practical_action": "Apply Network Resource Access Mediation to contain the blast radius once this technique is observed.",
      "tooling": [
        "Sentinel",
        "Defender for Endpoint"
      ]
    },
    {
      "id": "D3-DNR",
      "name": "Decoy Network Resource",
      "relationship": "deceive",
      "practical_action": "Deploy Decoy Network Resource to detect and mislead an adversary attempting 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 taint shared content 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: \"M365 OneDrive Malware File Upload\" -- Identifies the occurrence of files uploaded to OneDrive being detected as Malware by the file scanning engine. Attackers can use File Sharing and Organization Repositories to spread laterally within the company and amplify their access..."
    ]
  },
  "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": "Starting point for T1080",
        "description": "Generic starting query -- tune to the specific data source relevant to this technique.",
        "query": "DeviceEvents\n| where TimeGenerated > ago(24h)\n| where ActionType has \"<tune to T1080>\""
      }
    ],
    "spl": [],
    "esql": [
      {
        "name": "bba1b212-b85c-41c6-9b28-be0e5cdfc9b1 — M365 OneDrive Malware File Upload",
        "description": "(KUERY) Identifies the occurrence of files uploaded to OneDrive being detected as Malware by the file scanning engine. Attackers can use File Sharing and Organization Repositories to spread laterally within the company and amplify their access... (Source: Elastic's official detection-rules repository (Elastic License v2).)",
        "query": "data_stream.dataset:o365.audit and event.provider:OneDrive and event.code:SharePointFileOperation and event.action:FileMalwareDetected"
      },
      {
        "name": "0e52157a-8e96-4a95-a6e3-5faae5081a74 — M365 SharePoint Malware File Detected",
        "description": "(KUERY) Identifies the occurrence of files uploaded to SharePoint being detected as Malware by the file scanning engine. Attackers can use File Sharing and Organization Repositories to spread laterally within the company and amplify their access... (Source: Elastic's official detection-rules repository (Elastic License v2).)",
        "query": "data_stream.dataset:o365.audit and event.provider:SharePoint and event.code:SharePointFileOperation and event.action:FileMalwareDetected"
      }
    ]
  },
  "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": [
    "Taint Shared Content 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": "T1080 - Taint Shared Content Response Guidance",
    "labels": [
      "mitre",
      "attack",
      "d3fend",
      "secops",
      "basyrix"
    ],
    "sections": [
      "summary",
      "d3fend_mappings",
      "investigation_steps",
      "response_actions",
      "queries",
      "automation",
      "escalation_criteria",
      "false_positive_considerations"
    ]
  }
}