Sigma rule: Potential CVE-2023-36874 Exploitation - Uncommon Report.Wer Location

Rule

Title

Potential CVE-2023-36874 Exploitation - Uncommon Report.Wer Location

Status

test

Level

medium

Author

Nasreddine Bencherchali (Nextron Systems)

Date

2023-08-23

File

rules-emerging-threats/2023/Exploits/CVE-2023-36874/file_event_win_exploit_cve_2023_36874_report_creation.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the creation of a "Report.wer" file in an uncommon folder structure. This could be a sign of potential exploitation of CVE-2023-36874.

Log source

product

windows

category

file_event

Detection

selection:
    TargetFilename|contains: ':\ProgramData\Microsoft\Windows\WER\ReportArchive\'
    TargetFilename|endswith: '\Report.wer'
filter_main_locations:
    TargetFilename|contains:
        # Note: This list is non exhaustive. Use this as a start for hunting for suspicious folder report
        - '\ReportArchive\AppCrash_'
        - '\ReportArchive\AppHang_'
        - '\ReportArchive\Critical_'
        - '\ReportArchive\Kernel_'
        - '\ReportArchive\NonCritical_'
condition: selection and not 1 of filter_main_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.execution
• cve.2023-36874
• detection.emerging-threats

CVEs this rule names

• CVE-2023-36874

References

• https://github.com/Wh04m1001/CVE-2023-36874
• https://www.crowdstrike.com/blog/falcon-complete-zero-day-exploit-cve-2023-36874/

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-2023-36874/file_event_win_exploit_cve_2023_36874_report_creation.yml