ISO File Created Within Temp Folders

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About the rule

Rule Type

Standard

Rule Description

Detects the creation of a ISO file in the Outlook temp folder or in the Appdata temp folder. Typical of Qakbot TTP from end-July 2022.

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "File Created or Modified" AND (((FILENAME contains "\AppData\Local\Temp" AND FILENAME contains ".zip") OR (OBJECTNAME contains "\AppData\Local\Temp" AND OBJECTNAME contains ".zip")) AND (FILENAME endswith ".iso" OR OBJECTNAME endswith ".iso")) OR ((FILENAME contains "\AppData\Local\Microsoft\Windows\INetCache\Content.Outlook" OR OBJECTNAME contains "\AppData\Local\Microsoft\Windows\INetCache\Content.Outlook") AND (FILENAME endswith ".iso" OR OBJECTNAME endswith ".iso")) select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME

Detection

Execution Mode

realtime

Log Sources

Windows

Author

@sam0x90