Securityalert Malwaredetectediniso

KQL detection rule by reprise99 · MIT

When Defender for Endpoint detects malware in an ISO file retrieve the ISO file name, which directory it was found in and associated file hashes

//When Defender for Endpoint detects malware in an ISO file retrieve the ISO file name, which directory it was found in and associated file hashes

//Data connector required for this query - Security Alert (free table that other Defender products send alert info to)

SecurityAlert
| where ProviderName == "MDATP"
| where AlertName == "Malware was detected in an iso disc image file"
| mv-expand todynamic(Entities)
| extend Hashes = Entities.FileHashes
| mv-expand Hashes
| extend ['ISO File Name'] = tostring(Entities.Name)
| extend Directory = tostring(Entities.Directory)
| extend ['Hash Type'] = tostring(Hashes.Algorithm)
| extend Hash = tostring(Hashes.Value)
| where isnotempty(['ISO File Name'])
| project
    TimeGenerated,
    CompromisedEntity,
    ['ISO File Name'],
    Directory,
    ['Hash Type'],
    Hash

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

b8fc722f-b8cd-4137-8392-9f585b61c196

Propose edits, view related rules, and engage with the community through comments.

Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

Community Discussion