Password Protected ZIP File Opened (Email Attachment)

testhigh
log source: windows · securityauthor Florian Roth (Nextron Systems)date 2022-05-09
01

description

What this is, in brief.

Detects the extraction of password protected ZIP archives. See the filename variable for more details on which file has been opened.

02

tags

attack.initial-accessattack.stealthattack.t1027attack.t1566.001
03

rule source (YAML)

title: Password Protected ZIP File Opened (Email Attachment)
id: 571498c8-908e-40b4-910b-d2369159a3da
status: test
description: Detects the extraction of password protected ZIP archives. See the filename variable for more details on which file has been opened.
references:
    - https://twitter.com/sbousseaden/status/1523383197513379841
author: Florian Roth (Nextron Systems)
date: 2022-05-09
tags:
    - attack.initial-access
    - attack.stealth
    - attack.t1027
    - attack.t1566.001
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 5379
        TargetName|contains|all:
            - 'Microsoft_Windows_Shell_ZipFolder:filename'
            - '\Temporary Internet Files\Content.Outlook'
    condition: selection
falsepositives:
    - Legitimate used of encrypted ZIP files
level: high
04

detects techniques (2)

ATT&CK techniques this enables or maps to.

05

references

External citations — patches, advisories, analysis.