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DGA of Reconyc. Uses unpredictable seeding, but might still be intere…
…sting for testing DGA detection algorithms.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| """ | ||
| UNPREDICTABLE DGA OF RECONYC | ||
| from sample: d7e3bbdc38aa18b214fed3518798b86b | ||
| unpacks to: db0820a974dbea22d981bd39ddb19518 | ||
| """ | ||
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| import random | ||
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| class Mersenne: | ||
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| def __init__(self, seed): | ||
| self.n = 624 | ||
| self.w = 32 | ||
| self.wm = (2**32) - 1 | ||
| self.r = 31 | ||
| self.f = 1812433253 | ||
| self.a = 0x9908B0DF | ||
| self.u = 11 | ||
| self.s = 7 | ||
| self.t = 15 | ||
| self.d = 0xFFFFFFFF | ||
| self.b = 0x9D2C5680 | ||
| self.c = 0xEFC60000 | ||
| self.l = 18 | ||
| self.m = 397 | ||
| self.seed = seed | ||
| self.seed_b = ~seed | ||
| self.mt = self.n*[0] | ||
| self.lower_mask = (1 << self.r) - 1 | ||
| self.upper_mask = (1 << self.r) | ||
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| def seed_mt(self): | ||
| self.mt[0] = self.seed | ||
| for i in range(self.n-1): | ||
| self.mt[i+1] = (self.f * ((self.mt[i] >> 30) ^ self.mt[i]) + i+1) & self.wm | ||
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| def extract_number(self): | ||
| if self.seed != self.seed_b: | ||
| self.index = self.n + 1 | ||
| if self.index >= self.n: | ||
| if self.index == self.n + 1: | ||
| self.seed_mt() | ||
| self.seed = ~self.seed | ||
| self.seed_b = self.seed | ||
| self.twist() | ||
| self.index = 0 | ||
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| y = self.mt[self.index] | ||
| y ^= (y >> self.u) & self.d | ||
| y ^= (y << self.s) & self.b | ||
| y ^= (y << self.t) & self.c | ||
| y ^= (y >> self.l) | ||
| self.index += 1 | ||
| return y | ||
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| def twist(self): | ||
| for i in range(self.n-1): | ||
| a = (self.mt[i] & self.upper_mask) | ||
| b = (self.mt[(i+1) % self.n]) & self.lower_mask | ||
| x = a + b | ||
| x = x & self.wm | ||
| xA = (x >> 1) | ||
| if x % 2: | ||
| xA = (xA ^ self.a) | ||
| self.mt[i] = self.mt[(i+self.m) % self.n] ^ xA | ||
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| self.index = 0 | ||
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| def randint(mersenne, nr): | ||
| x = mersenne.extract_number() | ||
| return (nr*x) >> 32 | ||
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| charset = "iHRYg79zJXaGw1CF5K0d3vZobhAlx6StUBnjOIMpe2yVuPr4sL8DqmQTkEcWNf" | ||
| seed = random.randint(0, 1000*3600*24) | ||
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| if __name__ == "__main__": | ||
| mersenne = Mersenne(seed) | ||
| for nr in range(100): | ||
| domain = "" | ||
| for i in range(10): | ||
| c = charset[randint(mersenne, len(charset))] | ||
| domain += c | ||
| domain += ".com" | ||
| print(domain) | ||
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