// For feedback or questions contact us at: github@eset.com // https://github.com/eset/malware-ioc/ // // These YARA rules are provided to the community under the two-clause BSD // license as follows: // // Copyright (c) 2020, ESET // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are met: // // 1. Redistributions of source code must retain the above copyright notice, this // list of conditions and the following disclaimer. // // 2. Redistributions in binary form must reproduce the above copyright notice, // this list of conditions and the following disclaimer in the documentation // and/or other materials provided with the distribution. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // rule kobalos_ssh_credential_stealer { meta: description = "Kobalos SSH credential stealer seen in OpenSSH client" author = "Marc-Etienne M.Léveillé" date = "2020-11-02" reference = "http://www.welivesecurity.com" reference2 = "https://www.welivesecurity.com/wp-content/uploads/2021/01/ESET_Kobalos.pdf" source = "https://github.com/eset/malware-ioc/" license = "BSD 2-Clause" version = "1" strings: $ = "user: %.128s host: %.128s port %05d user: %.128s password: %.128s" condition: any of them }