rule win_sword_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.sword."
        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.sword"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 8bc1 8bf7 8bfa c1e902 f3a5 8b9c2418020000 }
            // n = 6, score = 100
            //   8bc1                 | mov                 eax, ecx
            //   8bf7                 | mov                 esi, edi
            //   8bfa                 | mov                 edi, edx
            //   c1e902               | shr                 ecx, 2
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8b9c2418020000       | mov                 ebx, dword ptr [esp + 0x218]

        $sequence_1 = { 57 e8???????? 83c408 85c0 7509 5f 5b }
            // n = 7, score = 100
            //   57                   | push                edi
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax
            //   7509                 | jne                 0xb
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx

        $sequence_2 = { e8???????? 8d4c243c 6a5c 51 e8???????? 8bd5 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8d4c243c             | lea                 ecx, [esp + 0x3c]
            //   6a5c                 | push                0x5c
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8bd5                 | mov                 edx, ebp

        $sequence_3 = { 6a00 6a00 6a00 7509 8d542414 6a04 52 }
            // n = 7, score = 100
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   7509                 | jne                 0xb
            //   8d542414             | lea                 edx, [esp + 0x14]
            //   6a04                 | push                4
            //   52                   | push                edx

        $sequence_4 = { 50 ff15???????? e9???????? 8dbc2494060000 83c9ff }
            // n = 5, score = 100
            //   50                   | push                eax
            //   ff15????????         |                     
            //   e9????????           |                     
            //   8dbc2494060000       | lea                 edi, [esp + 0x694]
            //   83c9ff               | or                  ecx, 0xffffffff

        $sequence_5 = { 89842478010000 ff15???????? 8dbc2484020000 83c9ff }
            // n = 4, score = 100
            //   89842478010000       | mov                 dword ptr [esp + 0x178], eax
            //   ff15????????         |                     
            //   8dbc2484020000       | lea                 edi, [esp + 0x284]
            //   83c9ff               | or                  ecx, 0xffffffff

        $sequence_6 = { b940000000 33c0 8d7c2419 8894241c010000 f3ab }
            // n = 5, score = 100
            //   b940000000           | mov                 ecx, 0x40
            //   33c0                 | xor                 eax, eax
            //   8d7c2419             | lea                 edi, [esp + 0x19]
            //   8894241c010000       | mov                 byte ptr [esp + 0x11c], dl
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax

        $sequence_7 = { 8d4c2420 6a3a 51 e8???????? 83c410 85c0 }
            // n = 6, score = 100
            //   8d4c2420             | lea                 ecx, [esp + 0x20]
            //   6a3a                 | push                0x3a
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   85c0                 | test                eax, eax

        $sequence_8 = { f2ae f7d1 49 bf???????? 894c2414 83c9ff }
            // n = 6, score = 100
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   bf????????           |                     
            //   894c2414             | mov                 dword ptr [esp + 0x14], ecx
            //   83c9ff               | or                  ecx, 0xffffffff

        $sequence_9 = { 49 53 51 8d8c2478010000 51 56 ff15???????? }
            // n = 7, score = 100
            //   49                   | dec                 ecx
            //   53                   | push                ebx
            //   51                   | push                ecx
            //   8d8c2478010000       | lea                 ecx, [esp + 0x178]
            //   51                   | push                ecx
            //   56                   | push                esi
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 106496
}