45 lines
2 KiB
Text
45 lines
2 KiB
Text
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/*
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Yara Rule Set
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Author: Florian Roth
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Date: 2017-08-11
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Identifier: Pupy Backdoor
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Reference: https://github.com/n1nj4sec/pupy-binaries
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*/
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/* Rule Set ----------------------------------------------------------------- */
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import "pe"
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rule Pupy_Backdoor {
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meta:
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description = "Detects Pupy backdoor"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Florian Roth (Nextron Systems)"
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reference = "https://github.com/n1nj4sec/pupy-binaries"
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date = "2017-08-11"
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hash1 = "ae93714203c7ab4ab73f2ad8364819d16644c7649ea04f483b46924bd5bc0153"
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hash2 = "83380f351214c3bd2c8e62430f70f8f90d11c831695027f329af04806b9f8ea4"
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hash3 = "90757c1ae9597bea39bb52a38fb3d497358a2499c92c7636d71b95ec973186cc"
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hash4 = "20e19817f72e72f87c794843d46c55f2b8fd091582bceca0460c9f0640c7bbd8"
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hash5 = "06bb41c12644ca1761bcb3c14767180b673cb9d9116b555680073509e7063c3e"
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hash6 = "be83c513b24468558dc7df7f63d979af41287e568808ed8f807706f6992bfab2"
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hash7 = "8784c317e6977b4c201393913e76fc11ec34ea657de24e957d130ce9006caa01"
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id = "11509847-3454-5412-b3e1-02ad9cccc6ae"
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strings:
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$x1 = "reflectively inject a dll into a process." fullword ascii
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$x2 = "ld_preload_inject_dll(cmdline, dll_buffer, hook_exit) -> pid" fullword ascii
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$x3 = "LD_PRELOAD=%s HOOK_EXIT=%d CLEANUP=%d exec %s 1>/dev/null 2>/dev/null" fullword ascii
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$x4 = "reflective_inject_dll" fullword ascii
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$x5 = "ld_preload_inject_dll" fullword ascii
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$x6 = "get_pupy_config() -> string" fullword ascii
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$x7 = "[INJECT] inject_dll. OpenProcess failed." fullword ascii
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$x8 = "reflective_inject_dll" fullword ascii
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$x9 = "reflective_inject_dll(pid, dll_buffer, isRemoteProcess64bits)" fullword ascii
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$x10 = "linux_inject_main" fullword ascii
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condition:
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( ( uint16(0) == 0x457f or uint16(0) == 0x5a4d ) and filesize < 7000KB and 1 of them )
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or 3 of them
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or ( uint16(0) == 0x5a4d and pe.imphash() == "84a69bce2ff6d9f866b7ae63bd70b163" )
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}
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