Sigma rule: CVE-2023-40477 Potential Exploitation - WinRAR Application Crash

Rule

Title

CVE-2023-40477 Potential Exploitation - WinRAR Application Crash

Status

test

Level

medium

Author

Nasreddine Bencherchali (Nextron Systems)

Date

2023-08-31

File

rules-emerging-threats/2023/Exploits/CVE-2023-40477/win_application_exploit_cve_2023_40477_winrar_crash.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects a crash of "WinRAR.exe" where the version is lower than 6.23. This could indicate potential exploitation of CVE-2023-40477

Log source

product

windows

service

application

Detection

selection:
    Provider_Name: 'Application Error'
    EventID: 1000
    AppName: 'WinRAR.exe'
filter_main_fixed_version:
    # TODO: fix this when the "lt" modifier is implemented for software versions
    AppVersion|startswith:
        - '6.23.'
        - '6.24.'
        - '6.25.'
        - '6.26.'
        - '7.'
condition: selection and not 1 of filter_main_*

False positives (as the rule lists them)

• Legitimate crash for reasons other than exploitation of the vulnerability

Tags

• attack.execution
• cve.2023-40477
• detection.emerging-threats

CVEs this rule names

• CVE-2023-40477

References

• https://wildptr.io/winrar-cve-2023-40477-poc-new-vulnerability-winrar-security-research/
• https://github.com/wildptr-io/Winrar-CVE-2023-40477-POC
• https://www.rarlab.com/vuln_rev3_names.html

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2023/Exploits/CVE-2023-40477/win_application_exploit_cve_2023_40477_winrar_crash.yml