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Link Target

Link Target is the destination or real file path that a shortcut or symbolic link points to. Attackers may replace or abuse link targets to redirect users and processes to malicious files, sensitive locations, or persistence points. Defenders should validate link destinations and watch for unexpected changes to shortcuts and symlinks.

A link target is the real destination behind a shortcut or symbolic link. It can be a local file, folder, or path that the user or process reaches indirectly, which makes the target more security-sensitive than the visible link object itself.

Because the target is what ultimately opens, runs, or reveals data, defenders should treat it as part of the trust boundary. A benign-looking shortcut can become dangerous if the target is changed to a different file, moved to a sensitive location, or pointed at something that triggers an unexpected action.

Link targets matter because the visible name is not the authority, the destination is. Attackers can abuse that gap by swapping a target, planting a link that resolves somewhere privileged, or using a link to disguise where a process is really reading from or writing to.

This is especially risky when software assumes the target is stable after creation. If a workflow validates only the shortcut name and not the resolved path, it may open the wrong object, inherit unsafe permissions, or follow a link into a location that should never have been reachable.

Common abuse patterns

One common abuse pattern is target replacement, where an attacker changes the destination after the link has already been trusted. Another is link planting, where the attacker creates a link in a location that a user, script, or service later trusts and follows without checking the resolved path.

Those patterns can support credential theft, tampering, or persistence when the destination is a sensitive file, an autostart location, or a path used by a privileged process. They can also be used to redirect attention during incident response by making the link object look harmless while the target does the damage.

Defensive handling starts with resolving the destination explicitly and comparing it to the expected path, owner, type, and location. Where the environment uses security baselines or approval workflows, the link should be reviewed as a pointer to an asset, not just as a filename.

Change monitoring is equally important. Unexpected edits to shortcut metadata or symlink destinations can be an early sign of tampering, misconfiguration, or post-compromise manipulation, especially when the same link is accessed by multiple users or automation jobs.

When link traversal is part of a privileged workflow, the validation standard should be higher than for ordinary user browsing. Using least privilege and path restrictions helps reduce the chance that a redirected target can reach sensitive data or execution points such as startup folders, admin scripts, or shared system paths. For broader control patterns, NIST SP 800-53 Rev 5 Security and Privacy Controls and NIST Cybersecurity Framework 2.0 both support consistent protection and monitoring discipline around integrity-sensitive file relationships.

Risk and Threat Considerations

Link targets create integrity risk because the object a user sees is not always the object a system uses. That gap can be abused to redirect execution, conceal persistence, or steer a process into a location with higher privilege or more sensitive data.

Failure mechanism: An attacker modifies the target after the link has been created, or places a crafted link where a trusted process later resolves it without checking the destination.

Impact: The system may open, overwrite, execute, or expose the wrong file, enabling tampering, privilege abuse, data disclosure, or persistence.

Standards & Framework Alignment

This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.

NIST SP 800-53 Rev 5 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.

Framework Control / Reference Relevance
NIST SP 800-53 Rev 5 SI-7 — Software, Firmware, and Information Integrity Link targets can be altered to subvert integrity of trusted file paths and references.
CM-5 — Access Restrictions for Change Unauthorized changes to link destinations are a configuration-control problem.
Recommendation — Validate resolved paths and monitor link target changes as integrity-sensitive objects. Restrict who can modify shortcuts and symlinks in sensitive locations.
NIST CSF 2.0 PR.DS-05 — Integrity is protected A link target attack is an integrity threat against the object a path resolves to.
DE.CM-01 — Networks and network services are monitored to find potentially adverse events Unexpected link target changes are detectable configuration anomalies.
Recommendation — Protect file and path integrity checks wherever links are resolved. Monitor for abnormal link creation or destination changes in high-risk paths.

Practitioner Guidance

What to watch for: Focus on unexpected target changes, unusual link creation in writable directories, and link resolution that lands in privileged or sensitive paths. Those are strong signals that a link is being used as a control bypass rather than a convenience feature.

Governance implication: Teams should define which link destinations are acceptable, who may create or modify them, and how changes are reviewed. If shortcuts and symlinks are used in automation, the validation rule should be explicit enough that operators can tell when a destination has drifted from the approved path.