| | | 1 | | using Intentum.Core.Behavior; |
| | | 2 | | using Intentum.Core.Models; |
| | | 3 | | |
| | | 4 | | namespace Intentum.Core.Finance; |
| | | 5 | | |
| | | 6 | | public static class FinanceRules |
| | | 7 | | { |
| | | 8 | | public static Func<BehaviorSpace, RuleMatch?> MoneyLaunderingPattern( |
| | 3 | 9 | | double confidence = 0.9) => space => |
| | 2 | 10 | | { |
| | 2 | 11 | | var signals = space.Events.Count(e => |
| | 5 | 12 | | e.Action.Contains("transfer.rapid", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 13 | | e.Action.Contains("structuring.detected", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 14 | | e.Action.Contains("jurisdiction.high_risk", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 15 | | e.Action.Contains("transfer.round_amounts", StringComparison.OrdinalIgnoreCase)); |
| | 3 | 16 | | |
| | 2 | 17 | | if (signals >= 2) |
| | 1 | 18 | | return new RuleMatch("MoneyLaunderingPattern", confidence, |
| | 1 | 19 | | $"Money laundering signals: {signals}"); |
| | 1 | 20 | | return null; |
| | 5 | 21 | | }; |
| | | 22 | | |
| | | 23 | | public static Func<BehaviorSpace, RuleMatch?> UnauthorizedAccess( |
| | 3 | 24 | | double confidence = 0.85) => space => |
| | 2 | 25 | | { |
| | 2 | 26 | | var signals = space.Events.Count(e => |
| | 5 | 27 | | e.Action.Contains("login.unusual.time", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 28 | | e.Action.Contains("device.new", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 29 | | e.Action.Contains("login.failed.multiple", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 30 | | e.Action.Contains("location.unusual", StringComparison.OrdinalIgnoreCase)); |
| | 3 | 31 | | |
| | 2 | 32 | | if (signals >= 2) |
| | 1 | 33 | | return new RuleMatch("UnauthorizedAccess", confidence, |
| | 1 | 34 | | $"Unauthorized access signals: {signals}"); |
| | 1 | 35 | | return null; |
| | 5 | 36 | | }; |
| | | 37 | | |
| | | 38 | | public static Func<BehaviorSpace, RuleMatch?> HighValueTransaction( |
| | 3 | 39 | | double confidence = 0.75) => space => |
| | 2 | 40 | | { |
| | 2 | 41 | | var signals = space.Events.Count(e => |
| | 5 | 42 | | e.Action.Contains("transaction.high_value", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 43 | | e.Action.Contains("recipient.unusual", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 44 | | e.Action.Contains("transaction.rapid_sequence", StringComparison.OrdinalIgnoreCase)); |
| | 3 | 45 | | |
| | 2 | 46 | | if (signals >= 2) |
| | 1 | 47 | | return new RuleMatch("HighValueTransaction", confidence, |
| | 1 | 48 | | $"High-value transaction signals: {signals}"); |
| | 1 | 49 | | return null; |
| | 5 | 50 | | }; |
| | | 51 | | |
| | | 52 | | public static Func<BehaviorSpace, RuleMatch?> AccountCompromise( |
| | 3 | 53 | | double confidence = 0.95) => space => |
| | 2 | 54 | | { |
| | 2 | 55 | | var signals = space.Events.Count(e => |
| | 5 | 56 | | e.Action.Contains("password.changed", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 57 | | e.Action.Contains("profile.updated", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 58 | | e.Action.Contains("login.suspicious", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 59 | | e.Action.Contains("mfa.disabled", StringComparison.OrdinalIgnoreCase)); |
| | 3 | 60 | | |
| | 2 | 61 | | if (signals >= 2) |
| | 1 | 62 | | return new RuleMatch("AccountCompromise", confidence, |
| | 1 | 63 | | $"Account compromise signals: {signals}"); |
| | 1 | 64 | | return null; |
| | 5 | 65 | | }; |
| | | 66 | | |
| | | 67 | | public static Func<BehaviorSpace, RuleMatch?> InsiderTrading( |
| | 3 | 68 | | double confidence = 0.9) => space => |
| | 2 | 69 | | { |
| | 2 | 70 | | var signals = space.Events.Count(e => |
| | 5 | 71 | | e.Action.Contains("trade.unusual.pattern", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 72 | | e.Action.Contains("trade.pre.announcement", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 73 | | e.Action.Contains("trade.timing.suspicious", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 74 | | e.Action.Contains("trade.volume.anomaly", StringComparison.OrdinalIgnoreCase)); |
| | 3 | 75 | | |
| | 2 | 76 | | if (signals >= 2) |
| | 1 | 77 | | return new RuleMatch("InsiderTrading", confidence, |
| | 1 | 78 | | $"Insider trading signals: {signals}"); |
| | 1 | 79 | | return null; |
| | 5 | 80 | | }; |
| | | 81 | | |
| | | 82 | | public static Func<BehaviorSpace, RuleMatch?> CreditFraud( |
| | 3 | 83 | | double confidence = 0.85) => space => |
| | 2 | 84 | | { |
| | 2 | 85 | | var signals = space.Events.Count(e => |
| | 5 | 86 | | e.Action.Contains("credit.application.rapid", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 87 | | e.Action.Contains("identity.mismatch", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 88 | | e.Action.Contains("credit.fabricated.documents", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 89 | | e.Action.Contains("credit.multiple.inquiries", StringComparison.OrdinalIgnoreCase)); |
| | 3 | 90 | | |
| | 2 | 91 | | if (signals >= 2) |
| | 1 | 92 | | return new RuleMatch("CreditFraud", confidence, |
| | 1 | 93 | | $"Credit fraud signals: {signals}"); |
| | 1 | 94 | | return null; |
| | 5 | 95 | | }; |
| | | 96 | | |
| | | 97 | | public static Func<BehaviorSpace, RuleMatch?> WireFraud( |
| | 3 | 98 | | double confidence = 0.9) => space => |
| | 2 | 99 | | { |
| | 2 | 100 | | var signals = space.Events.Count(e => |
| | 5 | 101 | | e.Action.Contains("wire.unusual.pattern", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 102 | | e.Action.Contains("wire.beneficiary.changed", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 103 | | e.Action.Contains("wire.urgent.request", StringComparison.OrdinalIgnoreCase) || |
| | 5 | 104 | | e.Action.Contains("wire.account.mismatch", StringComparison.OrdinalIgnoreCase)); |
| | 3 | 105 | | |
| | 2 | 106 | | if (signals >= 2) |
| | 1 | 107 | | return new RuleMatch("WireFraud", confidence, |
| | 1 | 108 | | $"Wire fraud signals: {signals}"); |
| | 1 | 109 | | return null; |
| | 5 | 110 | | }; |
| | | 111 | | |
| | | 112 | | public static Func<BehaviorSpace, RuleMatch?> ComplianceViolation( |
| | 3 | 113 | | double confidence = 0.85) => space => |
| | 2 | 114 | | { |
| | 2 | 115 | | var signals = space.Events.Count(e => |
| | 3 | 116 | | e.Action.Contains("compliance.regulatory.flag", StringComparison.OrdinalIgnoreCase) || |
| | 3 | 117 | | e.Action.Contains("compliance.reporting.gap", StringComparison.OrdinalIgnoreCase) || |
| | 3 | 118 | | e.Action.Contains("compliance.limit.exceeded", StringComparison.OrdinalIgnoreCase) || |
| | 3 | 119 | | e.Action.Contains("compliance.approval.missing", StringComparison.OrdinalIgnoreCase)); |
| | 3 | 120 | | |
| | 2 | 121 | | if (signals >= 1) |
| | 1 | 122 | | return new RuleMatch("ComplianceViolation", confidence, |
| | 1 | 123 | | $"Compliance violation signals: {signals}"); |
| | 1 | 124 | | return null; |
| | 5 | 125 | | }; |
| | | 126 | | |
| | | 127 | | public static IReadOnlyList<Func<BehaviorSpace, RuleMatch?>> AllRules() => |
| | 1 | 128 | | [ |
| | 1 | 129 | | AccountCompromise(), |
| | 1 | 130 | | MoneyLaunderingPattern(), |
| | 1 | 131 | | UnauthorizedAccess(), |
| | 1 | 132 | | HighValueTransaction(), |
| | 1 | 133 | | InsiderTrading(), |
| | 1 | 134 | | CreditFraud(), |
| | 1 | 135 | | WireFraud(), |
| | 1 | 136 | | ComplianceViolation() |
| | 1 | 137 | | ]; |
| | | 138 | | } |