58 lines
1.1 KiB
Text
58 lines
1.1 KiB
Text
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/* Check the entropy of the files being checked */
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import "math"
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rule math_entropy_close_8 : statistics {
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condition:
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math.entropy(0, filesize) >= 7.5
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}
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rule math_entropy_7 : statistics {
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condition:
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math.entropy(0, filesize) >= 7 and
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math.entropy(0, filesize) < 7.5
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}
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rule math_entropy_6 : statistics {
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condition:
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math.entropy(0, filesize) >= 6 and
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math.entropy(0, filesize) < 7
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}
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rule math_entropy_5 : statistics {
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condition:
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math.entropy(0, filesize) >= 5 and
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math.entropy(0, filesize) < 6
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}
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rule math_entropy_4 : statistics {
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condition:
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math.entropy(0, filesize) >= 4 and
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math.entropy(0, filesize) < 5
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}
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rule math_entropy_3 : statistics {
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condition:
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math.entropy(0, filesize) >= 3 and
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math.entropy(0, filesize) < 4
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}
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rule math_entropy_2 : statistics {
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condition:
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math.entropy(0, filesize) >= 2 and
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math.entropy(0, filesize) < 3
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}
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rule math_entropy_1 : statistics {
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condition:
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math.entropy(0, filesize) >= 1 and
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math.entropy(0, filesize) < 2
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}
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rule math_entropy_0 : statistics {
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condition:
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math.entropy(0, filesize) >= 0 and
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math.entropy(0, filesize) < 1
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}
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