Qbot 20230612 Execs

KQL detection rule by reversinglabs · MIT

QBot process execution seen for week of 2023-06-12

// description: QBot process execution seen for week of 2023-06-12
SecurityEvent
  | where EventID == 4688
  | where (Process == "conhost.exe" and CommandLine matches regex @"C:\\Users\\Public\\.*\.dll")
    or (Process == "rundll32.exe" and CommandLine matches regex @"C:\\(Users\\.*\\|ProgramData\\).*\.(dat|dll)")
    or (Process == "wscript.exe" and CommandLine matches regex @"C:\\Users\\Admin\\AppData\\Local\\Temp\\.*\.(wsf|js)")
| union 
(DeviceProcessEvents
  | where (FileName == "conhost.exe" and ProcessCommandLine matches regex @"C:\\Users\\Public\\.*\.dll")
    or (FileName == "rundll32.exe" and ProcessCommandLine matches regex @"C:\\(Users\\.*\\|ProgramData\\).*\.(dat|dll)")
    or (FileName == "wscript.exe" and ProcessCommandLine matches regex @"C:\\Users\\Admin\\AppData\\Local\\Temp\\.*\.(wsf|js)")
)

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

aa97ca7f-8188-406f-9c4f-3e5be9053fe5

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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 ]]

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