Windows Network Access Suspicious desktop.ini Action

testmedium
log source: windows · securityauthor Tim Shelton (HAWK.IO)date 2021-12-06
01

description

What this is, in brief.

Detects unusual processes accessing desktop.ini remotely over network share, which can be leveraged to alter how Explorer displays a folder's content (i.e. renaming files) without changing them on disk.

02

tags

attack.privilege-escalationattack.persistenceattack.t1547.009
03

rule source (YAML)

title: Windows Network Access Suspicious desktop.ini Action
id: 35bc7e28-ee6b-492f-ab04-da58fcf6402e
status: test
description: Detects unusual processes accessing desktop.ini remotely over network share, which can be leveraged to alter how Explorer displays a folder's content (i.e. renaming files) without changing them on disk.
references:
    - https://isc.sans.edu/forums/diary/Desktopini+as+a+postexploitation+tool/25912/
author: Tim Shelton (HAWK.IO)
date: 2021-12-06
modified: 2022-01-16
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1547.009
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 5145
        ObjectType: File
        RelativeTargetName|endswith: '\desktop.ini'
        AccessList|contains:
            - 'WriteData'
            - 'DELETE'
            - 'WriteDAC'
            - 'AppendData'
            - 'AddSubdirectory'
    condition: selection
falsepositives:
    - Read only access list authority
level: medium
04

detects techniques (1)

ATT&CK techniques this enables or maps to.

05

references

External citations — patches, advisories, analysis.