rule win_syscon_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.syscon."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.syscon"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 68???????? ffd6 eb0c 53 }
            // n = 4, score = 200
            //   68????????           |                     
            //   ffd6                 | call                esi
            //   eb0c                 | jmp                 0xe
            //   53                   | push                ebx

        $sequence_1 = { 8bd6 2bd7 42 52 }
            // n = 4, score = 200
            //   8bd6                 | mov                 edx, esi
            //   2bd7                 | sub                 edx, edi
            //   42                   | inc                 edx
            //   52                   | push                edx

        $sequence_2 = { 8b3d???????? 68???????? ffd7 6800010000 6a00 68???????? c744242000000000 }
            // n = 7, score = 200
            //   8b3d????????         |                     
            //   68????????           |                     
            //   ffd7                 | call                edi
            //   6800010000           | push                0x100
            //   6a00                 | push                0
            //   68????????           |                     
            //   c744242000000000     | mov                 dword ptr [esp + 0x20], 0

        $sequence_3 = { 2bc3 40 50 53 68???????? ffd6 }
            // n = 6, score = 200
            //   2bc3                 | sub                 eax, ebx
            //   40                   | inc                 eax
            //   50                   | push                eax
            //   53                   | push                ebx
            //   68????????           |                     
            //   ffd6                 | call                esi

        $sequence_4 = { a3???????? a1???????? 68???????? 50 c705????????10000000 ff15???????? }
            // n = 6, score = 200
            //   a3????????           |                     
            //   a1????????           |                     
            //   68????????           |                     
            //   50                   | push                eax
            //   c705????????10000000     |     
            //   ff15????????         |                     

        $sequence_5 = { 51 2ac2 52 8845ff }
            // n = 4, score = 200
            //   51                   | push                ecx
            //   2ac2                 | sub                 al, dl
            //   52                   | push                edx
            //   8845ff               | mov                 byte ptr [ebp - 1], al

        $sequence_6 = { c705????????01000000 c705????????04000000 891d???????? 891d???????? c705????????10000000 }
            // n = 5, score = 200
            //   c705????????01000000     |     
            //   c705????????04000000     |     
            //   891d????????         |                     
            //   891d????????         |                     
            //   c705????????10000000     |     

        $sequence_7 = { 56 8b35???????? 68???????? ffd6 33db 53 }
            // n = 6, score = 200
            //   56                   | push                esi
            //   8b35????????         |                     
            //   68????????           |                     
            //   ffd6                 | call                esi
            //   33db                 | xor                 ebx, ebx
            //   53                   | push                ebx

        $sequence_8 = { 448bc0 e8???????? 488d4c2420 ff15???????? 33db }
            // n = 5, score = 100
            //   448bc0               | mov                 eax, eax
            //   e8????????           |                     
            //   488d4c2420           | dec                 eax
            //   ff15????????         |                     
            //   33db                 | mov                 dword ptr [esp + 0x28], ebx

        $sequence_9 = { 488d4c2420 ff15???????? 488bf8 4885c0 0f84dbf3ffff }
            // n = 5, score = 100
            //   488d4c2420           | inc                 esp
            //   ff15????????         |                     
            //   488bf8               | mov                 eax, eax
            //   4885c0               | dec                 eax
            //   0f84dbf3ffff         | lea                 ecx, [esp + 0x20]

        $sequence_10 = { 488d0d3a520000 ff15???????? 488d542420 488d0d28520000 448bc0 e8???????? }
            // n = 6, score = 100
            //   488d0d3a520000       | dec                 eax
            //   ff15????????         |                     
            //   488d542420           | lea                 edx, [esp + 0x20]
            //   488d0d28520000       | dec                 eax
            //   448bc0               | mov                 ecx, edi
            //   e8????????           |                     

        $sequence_11 = { e9???????? 33d2 488bc8 ff15???????? 488bcb 8bf8 ff15???????? }
            // n = 7, score = 100
            //   e9????????           |                     
            //   33d2                 | lea                 edx, [esp + 0x20]
            //   488bc8               | dec                 eax
            //   ff15????????         |                     
            //   488bcb               | lea                 ecx, [0x5228]
            //   8bf8                 | inc                 esp
            //   ff15????????         |                     

        $sequence_12 = { 488d0d8c510000 448bc0 e8???????? 488d542420 488bcf ff15???????? 488905???????? }
            // n = 7, score = 100
            //   488d0d8c510000       | dec                 eax
            //   448bc0               | lea                 ecx, [0x518c]
            //   e8????????           |                     
            //   488d542420           | inc                 esp
            //   488bcf               | mov                 eax, eax
            //   ff15????????         |                     
            //   488905????????       |                     

        $sequence_13 = { e8???????? 48393d???????? 7427 33d2 8bcb e8???????? eb1c }
            // n = 7, score = 100
            //   e8????????           |                     
            //   48393d????????       |                     
            //   7427                 | je                  0x29
            //   33d2                 | xor                 edx, edx
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   eb1c                 | jmp                 0x1e

        $sequence_14 = { 48895c2428 895c2420 ff15???????? 4c8be0 }
            // n = 4, score = 100
            //   48895c2428           | dec                 eax
            //   895c2420             | lea                 ecx, [0x523a]
            //   ff15????????         |                     
            //   4c8be0               | dec                 eax

        $sequence_15 = { 488d8d90050000 4d8bc6 33d2 e8???????? 0fb74c2448 0fb7542446 }
            // n = 6, score = 100
            //   488d8d90050000       | dec                 eax
            //   4d8bc6               | mov                 ecx, eax
            //   33d2                 | dec                 eax
            //   e8????????           |                     
            //   0fb74c2448           | mov                 ecx, ebx
            //   0fb7542446           | mov                 edi, eax

    condition:
        7 of them and filesize < 120832
}

import "pe"

rule win_syscon_w0 {
    meta:
        author = "Florian Roth"
        reference = "https://goo.gl/JAHZVL"
        date = "2018-03-03"
        hash = "d31fe5cfa884e04ee26f323b8d104dcaa91146f5c7c216212fd3053afaade80f"
        hash = "fc2bcd38659ae83fd25b4f7091412ae9ba011612fa4dcc3ef665b2cae2a1d74f"
        hash = "2c5e5c86ca4fa172341c6bcbaa50984fb168d650ae9a33f2c6e6dccc1d57b369"
        hash = "439c305cd408dbb508e153caab29d17021a7430f1dbaec0c90ac750ba2136f5f"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.syscon"
        malpedia_version = "20170809"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $x1 = "cmd /c taskkill /im cliconfg.exe /f /t && del /f /q" fullword ascii
        $x2 = "\\FTPCom_vs10\\Release\\Engine.pdb" ascii
        $x3 = "KXU/yP=B29tLzidqNRuf-SbVInw0oCrmWZk6OpFc7A5GTD1QxaJ3H8h4jMeEsYglv" fullword ascii
        $x4 = "D:\\Task\\MiMul\\" ascii

        $s1 = "[DLL_PROCESS_ATTACH]" fullword ascii
        $s2 = "cmd /c systeminfo >%s" fullword ascii
        $s3 = "post.txt" fullword ascii
        $s4 = "\\temp.ini" fullword ascii
        $s5 = "[GetFTPAccountInfo_10001712]" fullword ascii
        $s6 = "ComSysAppMutex" fullword ascii
        $s7 = "From %s (%02d-%02d %02d-%02d-%02d).txt" fullword ascii
        $s8 = "%s %s %c%s%c" fullword ascii
        $s9 = "TO EVERYONE" fullword ascii
    condition:
        pe.imphash() == "e14b59a79999cc0bc589a4cb5994692a" or pe.imphash() == "64400f452e2f60305c341e08f217b02c" or 1 of ($x*) or 3 of them
}