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MediumSigmaHQSwachchhanda Shrawan Poudel (Nextron Systems)

Suspicious Shell Open Command Registry Modification

Detects modifications to shell open registry keys that point to suspicious locations typically used by malware for persistence. Generally, modifications to the `*\shell\open\command` registry key can indicate an…

Description

Detects modifications to shell open registry keys that point to suspicious locations typically used by malware for persistence. Generally, modifications to the `*\shell\open\command` registry key can indicate an attempt to change the default action for opening files, and various UAC bypass or persistence techniques involve modifying these keys to execute malicious scripts or binaries.

Detection logic

Detection requirements

Platform
Windows

The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.

Log source product
windows
Log source category
registry_set

Known benign triggers

  • Legitimate software installations or updates that modify the shell open command registry keys to these locations.

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