Features address: String. Bitcoin address. year: Integer. Year. day: Integer. Day of the year. 1 is the first day, 365 is the last day. length: Integer. weight: Float. count: Integer. looped: Integer. neighbors: Integer. income: Integer. Satoshi amount (1 bitcoin = 100 million satoshis). label: Category String. Name of the ransomware family (e.g., Cryptxxx, cryptolocker etc) or white (i.e., not known to be ransomware). Our graph features are designed to quantify specific transaction patterns. Loop is intended to count how many transaction i) split their coins; ii) move these coins in the network by using different paths and finally, and iii) merge them in a single address. Coins at this final address can then be sold and converted to fiat currency. Weight quantifies the merge behavior (i.e., the transaction has more input addresses than output addresses), where coins in multiple addresses are each passed through a succession of merging transactions and accumulated in a final address. Similar to weight, the count feature is designed to quantify the merging pattern. However, the count feature represents information on the number of transactions, whereas the weight feature represents information on the amount (what percent of these transactions’ output?) of transactions. Length is designed to quantify mixing rounds on Bitcoin, where transactions receive and distribute similar amounts of coins in multiple rounds with newly created addresses to hide the coin origin. White Bitcoin addresses are capped at 1K per day (Bitcoin has 800K addresses daily). Note that although we are certain about ransomware labels, we do not know if all white addresses are in fact not related to ransomware. When compared to non-ransomware addresses, ransomware addresses exhibit more profound right skewness in distributions of feature values.