47 lines
No EOL
2 KiB
Text
47 lines
No EOL
2 KiB
Text
// Mumblehard packer yara rule
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// https://github.com/eset/malware-ioc/
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//
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// These yara rules are provided to the community under the two-clause BSD
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// license as follows:
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//
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// Copyright (c) 2015, ESET
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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rule mumblehard_packer
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{
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meta:
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description = "Mumblehard i386 assembly code responsible for decrypting Perl code"
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author = "Marc-Etienne M. Leveille"
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date = "2015-04-07"
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reference = "http://www.welivesecurity.com"
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version = "1"
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strings:
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$decrypt = { 31 db [1-10] ba ?? 00 00 00 [0-6] (56 5f | 89 F7)
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39 d3 75 13 81 fa ?? 00 00 00 75 02 31 d2 81 c2 ?? 00 00
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00 31 db 43 ac 30 d8 aa 43 e2 e2 }
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condition:
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$decrypt
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} |