Cross-source coverage
T1027.012 / ATT&CK
Obfuscated Files or Information: LNK Icon Smuggling
2 rules across 1 source.
From MITRE ATT&CK 19.2
Adversaries may smuggle commands to download malicious payloads past content filters by hiding them within otherwise seemingly benign windows shortcut files. Windows shortcut files (.LNK) include many metadata fields, including an icon location field (also known as the IconEnvironmentDataBlock) designed to specify the path to an icon file that is to be displayed for the LNK file within a host directory.
Adversaries may abuse this LNK metadata to download malicious payloads. For example, adversaries have been observed using LNK files as phishing payloads to deliver malware. Once invoked (e.g., Malicious File), payloads referenced via external URLs within the LNK icon location field may be downloaded. These files may also then be invoked by Command and Scripting Interpreter/System Binary Proxy Execution arguments within the target path field of the LNK.
LNK Icon Smuggling may also be utilized post compromise, such as malicious scripts executing an LNK on an infected host to download additional malicious payloads.
- Tactics
- Stealth
- Platforms
- Windows
- Telemetry
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WinEventLog:Sysmon
How MITRE says to detect it DET0405
Detection Strategy for LNK Icon Smuggling
Windows Analytic 1134
Correlates LNK file execution with embedded resource extraction or suspicious network activity following initial launch, often leading to payload delivery via disguised icons.
WinEventLog:SysmonEventCode=1WinEventLog:SysmonEventCode=15WinEventLog:SysmonEventCode=3, 22
Bert-JanP/Hunting-Queries-Detection-Rules
2 rules| Detection | Severity | Format |
|---|---|---|
| MITRE ATT&CK Mapping | Undefined | KQL |
| Rare .lnk File Created on Desktop | Undefined | KQL |