Add rules for Cerberus#80
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* Adds rule #00277 "Invoke method dynamically via reflection", generated from analysis of Cerberus samples. The rule pairs Object.getClass() with Method.invoke() — the canonical reflective invocation pattern. After score-adjustment training this rule scored 2.16; it fires on roughly 1.8× as many malware samples (31.1%) as benign samples (17.4%) in the corpus, and lands on all 10 Cerberus samples evaluated here. Note: this rule is added to the rule pool but is intentionally NOT featured as evidence in the corresponding Cerberus malware report — the report uses existing higher-discrimination rules (accessibility, icon-hide, Base64-decode-and-write) to walk through Cerberus's MITRE-mapped behaviors. Pair (Object.getClass + Method.invoke) is too generic to anchor a specific MITRE technique on its own. * Re-tunes the existing rules' scores from the score-adjustment training pass run with the Cerberus sample set added to the corpus. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
haeter525
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Jul 8, 2026
Retrain the existing 277-rule pool against the corpus after adding 15 AhRat samples for the analysis report in quark-engine PR #934. No new rule is added — AhRat's distinctive bytecode patterns (SMS and call-log reads via ContentResolver, last-known-location lookups) are already covered by the existing pool. This matches the sync convention of the earlier malware-detection PRs (#82 NGate, #80 Cerberus, #76 TangleBot, #74 Godfather). Companion analysis report PR: ev-flow/quark-engine#934 Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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close #79