rule win_byeby_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.byeby"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 8d8424c8030000 83c40c c7842468030000546d5630 c784246c03000055484a76 c78424700300002025733a }
            // n = 5, score = 100
            //   8d8424c8030000       | lea                 eax, [esp + 0x3c8]
            //   83c40c               | add                 esp, 0xc
            //   c7842468030000546d5630     | mov    dword ptr [esp + 0x368], 0x30566d54
            //   c784246c03000055484a76     | mov    dword ptr [esp + 0x36c], 0x764a4855
            //   c78424700300002025733a     | mov    dword ptr [esp + 0x370], 0x3a732520

        $sequence_1 = { c684243403000000 e8???????? 8b15???????? 83ec08 b9???????? e8???????? }
            // n = 6, score = 100
            //   c684243403000000     | mov                 byte ptr [esp + 0x334], 0
            //   e8????????           |                     
            //   8b15????????         |                     
            //   83ec08               | sub                 esp, 8
            //   b9????????           |                     
            //   e8????????           |                     

        $sequence_2 = { 660f6f05???????? 8d8424b4020000 6a08 50 8d84243c060000 c78424bc02000061475673 }
            // n = 6, score = 100
            //   660f6f05????????     |                     
            //   8d8424b4020000       | lea                 eax, [esp + 0x2b4]
            //   6a08                 | push                8
            //   50                   | push                eax
            //   8d84243c060000       | lea                 eax, [esp + 0x63c]
            //   c78424bc02000061475673     | mov    dword ptr [esp + 0x2bc], 0x73564761

        $sequence_3 = { 6a00 ff15???????? 85c0 0f845fffffff 8b85ccfeffff }
            // n = 5, score = 100
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f845fffffff         | je                  0xffffff65
            //   8b85ccfeffff         | mov                 eax, dword ptr [ebp - 0x134]

        $sequence_4 = { 83c40c c78588fcffff04010000 ff15???????? 8d8d94fcffff c78594fcffff00000000 51 50 }
            // n = 7, score = 100
            //   83c40c               | add                 esp, 0xc
            //   c78588fcffff04010000     | mov    dword ptr [ebp - 0x378], 0x104
            //   ff15????????         |                     
            //   8d8d94fcffff         | lea                 ecx, [ebp - 0x36c]
            //   c78594fcffff00000000     | mov    dword ptr [ebp - 0x36c], 0
            //   51                   | push                ecx
            //   50                   | push                eax

        $sequence_5 = { 85c0 741e 50 ff766c ff75d4 e8???????? 8b7df0 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   741e                 | je                  0x20
            //   50                   | push                eax
            //   ff766c               | push                dword ptr [esi + 0x6c]
            //   ff75d4               | push                dword ptr [ebp - 0x2c]
            //   e8????????           |                     
            //   8b7df0               | mov                 edi, dword ptr [ebp - 0x10]

        $sequence_6 = { c68424f003000000 6a00 50 e8???????? 8b742418 }
            // n = 5, score = 100
            //   c68424f003000000     | mov                 byte ptr [esp + 0x3f0], 0
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b742418             | mov                 esi, dword ptr [esp + 0x18]

        $sequence_7 = { 8d8c242c030000 c784242c0300005a475630 c78424300300005a574e30 c684243403000000 e8???????? 8b15???????? 83ec08 }
            // n = 7, score = 100
            //   8d8c242c030000       | lea                 ecx, [esp + 0x32c]
            //   c784242c0300005a475630     | mov    dword ptr [esp + 0x32c], 0x3056475a
            //   c78424300300005a574e30     | mov    dword ptr [esp + 0x330], 0x304e575a
            //   c684243403000000     | mov                 byte ptr [esp + 0x334], 0
            //   e8????????           |                     
            //   8b15????????         |                     
            //   83ec08               | sub                 esp, 8

        $sequence_8 = { 0f88f4020000 33c9 b864000000 f7e6 0f90c1 f7d9 }
            // n = 6, score = 100
            //   0f88f4020000         | js                  0x2fa
            //   33c9                 | xor                 ecx, ecx
            //   b864000000           | mov                 eax, 0x64
            //   f7e6                 | mul                 esi
            //   0f90c1               | seto                cl
            //   f7d9                 | neg                 ecx

        $sequence_9 = { 740b 8d44246c 50 ff15???????? 8b442430 85c0 7409 }
            // n = 7, score = 100
            //   740b                 | je                  0xd
            //   8d44246c             | lea                 eax, [esp + 0x6c]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b442430             | mov                 eax, dword ptr [esp + 0x30]
            //   85c0                 | test                eax, eax
            //   7409                 | je                  0xb

    condition:
        7 of them and filesize < 253952
}