Serious Girl Live Wallpaper

AI Security Review

Evidence context: threat category none; evidence quality strong.

This extension triggers 17 YARA rule matches, all classified as malware-signature with high severity. However, examination of the specific finding titles reveals these are exclusively known false-positive patterns documented in CVEQ's false-positive guidance.

The postinstall_* rules (postinstall_network_communication in /tmp/extract-e66364c888a3582ee1edf6f6396ece74cef8324b801f346e353aec8bed3eccf2-1298521853/index.html, postinstall_file_manipulation in /tmp/extract-e66364c888a3582ee1edf6f6396ece74cef8324b801f346e353aec8bed3eccf2-1298521853/style.css, postinstall_obfuscation in /tmp/extract-e66364c888a3582ee1edf6f6396ece74cef8324b801f346e353aec8bed3eccf2-1298521853/jquery-3.7.1.min.js) match basic JavaScript patterns and should never drive a verdict. The code-quality rules (SQLInjection in /tmp/extract-e66364c888a3582ee1edf6f6396ece74cef8324b801f346e353aec8bed3eccf2-1298521853/script.js, NoUseWeakRandom in /tmp/extract-e66364c888a3582ee1edf6f6396ece74cef8324b801f346e353aec8bed3eccf2-1298521853/script.js, LocalStorageShouldNotBeUsed in /tmp/extract-e66364c888a3582ee1edf6f6396ece74cef8324b801f346e353aec8bed3eccf2-1298521853/script.js) are benign code-smell findings. The remaining matches in _metadata/verified_contents.json and img/bg.mp4 are metadata and media files, not executable code.

Crucially, the findings summary shows zero IoC findings, zero obfuscation findings, and zero network findings. There are no suspicious domains, no actual malware family signatures, and no evidence of credential theft, browser hijacking, or proxyware behavior. The extension uses jQuery 3.7.1, a legitimate bundled dependency that triggers its own YARA matches.

The strongest counterargument is that 17 high-severity malware-signature findings should indicate malicious code. This argument fails because severity labels in CVEQ do not override documented false-positive patterns. The postinstall_* rules are explicitly classified as noise sources in the platform's known false-positive patterns. Finding count and severity labels are explicitly unreliable metrics; the nature of the findings matters. None of these findings represent actual malware behavior—no data exfiltration, no credential access, no malicious domains, no hidden payloads.

The developer uses a Gmail address ([email protected]) and the extension has only 14 users, which limits trust but does not indicate malice. The extension's purpose—live wallpaper for Chrome new tab—aligns with its file structure and contains no indicators of deceptive behavior or category mismatch.

Key Reasons

• All 17 findings are from documented false-positive YARA rules (postinstall_*, SQLInjection, NoUseWeakRandom, LocalStorageShouldNotBeUsed)
• Zero IoC findings, zero suspicious domains, zero actual malware signatures
• Findings distributed across legitimate files including bundled jQuery library and metadata files
• No obfuscation findings, no network findings, no credential access evidence

False Positive Considerations

• postinstall_* YARA rules matching basic JavaScript patterns
• Code-quality rules (SQLInjection, NoUseWeakRandom, LocalStorageShouldNotBeUsed) classified as noise
• Bundled jQuery library triggering YARA matches
• Metadata and media files triggering false YARA signatures

Reviewed 2026-04-28; recommended action: suppress false positive; model confidence 85%.