58 lines
2.4 KiB
Text
58 lines
2.4 KiB
Text
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// For feedback or questions contact us at: github@eset.com
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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) 2020, 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 kobalos
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{
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meta:
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description = "Kobalos malware"
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author = "Marc-Etienne M.Léveillé"
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date = "2020-11-02"
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reference = "http://www.welivesecurity.com"
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reference2 = "https://www.welivesecurity.com/wp-content/uploads/2021/01/ESET_Kobalos.pdf"
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source = "https://github.com/eset/malware-ioc/"
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license = "BSD 2-Clause"
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version = "1"
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strings:
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$encrypted_strings_sizes = {
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05 00 00 00 09 00 00 00 04 00 00 00 06 00 00 00
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08 00 00 00 08 00 00 00 02 00 00 00 02 00 00 00
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01 00 00 00 01 00 00 00 05 00 00 00 07 00 00 00
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05 00 00 00 05 00 00 00 05 00 00 00 0A 00 00 00
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}
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$password_md5_digest = { 3ADD48192654BD558A4A4CED9C255C4C }
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$rsa_512_mod_header = { 10 11 02 00 09 02 00 }
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$strings_rc4_key = { AE0E05090F3AC2B50B1BC6E91D2FE3CE }
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condition:
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any of them
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}
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