rule win_smac_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.smac"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 83c40c 8bd8 8d45b4 c645fc0f e8???????? 6a01 }
            // n = 6, score = 200
            //   83c40c               | add                 esp, 0xc
            //   8bd8                 | mov                 ebx, eax
            //   8d45b4               | lea                 eax, [ebp - 0x4c]
            //   c645fc0f             | mov                 byte ptr [ebp - 4], 0xf
            //   e8????????           |                     
            //   6a01                 | push                1

        $sequence_1 = { 58 6a0d 668945f2 58 6a0a 668945f4 }
            // n = 6, score = 200
            //   58                   | pop                 eax
            //   6a0d                 | push                0xd
            //   668945f2             | mov                 word ptr [ebp - 0xe], ax
            //   58                   | pop                 eax
            //   6a0a                 | push                0xa
            //   668945f4             | mov                 word ptr [ebp - 0xc], ax

        $sequence_2 = { 8d8560ffffff 50 8d7d98 c645fc0b }
            // n = 4, score = 200
            //   8d8560ffffff         | lea                 eax, [ebp - 0xa0]
            //   50                   | push                eax
            //   8d7d98               | lea                 edi, [ebp - 0x68]
            //   c645fc0b             | mov                 byte ptr [ebp - 4], 0xb

        $sequence_3 = { 50 6a01 ff9524fcffff 68e8030000 ff15???????? 6a5c 58 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   6a01                 | push                1
            //   ff9524fcffff         | call                dword ptr [ebp - 0x3dc]
            //   68e8030000           | push                0x3e8
            //   ff15????????         |                     
            //   6a5c                 | push                0x5c
            //   58                   | pop                 eax

        $sequence_4 = { 6a41 6689759e 5e 668975a0 6a2f 8bf0 668975a2 }
            // n = 7, score = 200
            //   6a41                 | push                0x41
            //   6689759e             | mov                 word ptr [ebp - 0x62], si
            //   5e                   | pop                 esi
            //   668975a0             | mov                 word ptr [ebp - 0x60], si
            //   6a2f                 | push                0x2f
            //   8bf0                 | mov                 esi, eax
            //   668975a2             | mov                 word ptr [ebp - 0x5e], si

        $sequence_5 = { ff15???????? 6a01 8db3a4000000 33ff e8???????? 6a01 8d7374 }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   6a01                 | push                1
            //   8db3a4000000         | lea                 esi, [ebx + 0xa4]
            //   33ff                 | xor                 edi, edi
            //   e8????????           |                     
            //   6a01                 | push                1
            //   8d7374               | lea                 esi, [ebx + 0x74]

        $sequence_6 = { 50 ff7598 8d459c 50 8d7db8 c645fc0b e8???????? }
            // n = 7, score = 200
            //   50                   | push                eax
            //   ff7598               | push                dword ptr [ebp - 0x68]
            //   8d459c               | lea                 eax, [ebp - 0x64]
            //   50                   | push                eax
            //   8d7db8               | lea                 edi, [ebp - 0x48]
            //   c645fc0b             | mov                 byte ptr [ebp - 4], 0xb
            //   e8????????           |                     

        $sequence_7 = { 83c40c 6804010000 8d85ecfdffff 50 68???????? ff15???????? 8d85ecfdffff }
            // n = 7, score = 200
            //   83c40c               | add                 esp, 0xc
            //   6804010000           | push                0x104
            //   8d85ecfdffff         | lea                 eax, [ebp - 0x214]
            //   50                   | push                eax
            //   68????????           |                     
            //   ff15????????         |                     
            //   8d85ecfdffff         | lea                 eax, [ebp - 0x214]

        $sequence_8 = { 668945d0 58 668945d2 6a4c }
            // n = 4, score = 200
            //   668945d0             | mov                 word ptr [ebp - 0x30], ax
            //   58                   | pop                 eax
            //   668945d2             | mov                 word ptr [ebp - 0x2e], ax
            //   6a4c                 | push                0x4c

        $sequence_9 = { 3d01010000 7d0d 8a4c181c 888860564100 40 ebe9 33c0 }
            // n = 7, score = 200
            //   3d01010000           | cmp                 eax, 0x101
            //   7d0d                 | jge                 0xf
            //   8a4c181c             | mov                 cl, byte ptr [eax + ebx + 0x1c]
            //   888860564100         | mov                 byte ptr [eax + 0x415660], cl
            //   40                   | inc                 eax
            //   ebe9                 | jmp                 0xffffffeb
            //   33c0                 | xor                 eax, eax

    condition:
        7 of them and filesize < 212992
}