26 lines
1 KiB
Text
26 lines
1 KiB
Text
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rule HeapLib
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{
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meta:
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author = "adnan.shukor@gmail.com"
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description = "Detection of HeapLib which commonly used in heap spray related exploit"
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ref = "http://www.phreedom.org/research/heap-feng-shui/heap-feng-shui.html"
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cve = "NA"
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version = "1"
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impact = 3
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hide = false
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strings:
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$heaplib_1 = /\.ie\s?=\s?function\s?\(maxAlloc,/
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$heaplib_2 = /\.ie\.prototype\.round\s?=\s?function\s?\(num,\s?round\)/
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$heaplib_3 = /\.ie\.prototype\.hex\s?=\s?function\s?\(num,\s?width\)/
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$heaplib_4 = /\.ie\.prototype\.addr\s?=\s?function\s?\(addr\)/
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$heaplib_5 = /\.ie\.prototype\.allocOleaut32\s?=\s?function\s?\(arg,\s?tag\)/
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$heaplib_6 = /\.ie\.prototype\.freeOleaut32/
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$heaplib_7 = /\.maxAlloc\s?=\s?\(maxAlloc\s?\?\s?maxAlloc\s?:\s?65535\s?\)/
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$heaplib_8 = "return unescape(\"%u\" + this.hex(addr & 0xFFFF, 4) + \"%u\" + this.hex((addr >> 16) & 0xFFFF, 4))"
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$heaplib_9 = /\.(free|flush)Oleaut32\(/
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$heaplib_10 = "return this.heapBase + 0x688 + ((size+8)/8)*48"
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$heaplib_11 = /vtable\s?\+=\s?unescape\("%u0028%u0028"\)/
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condition:
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5 of them
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}
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