rule win_dairy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.dairy."
        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.dairy"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 7542 8b4504 6a3a 50 e8???????? }
            // n = 5, score = 100
            //   7542                 | jne                 0x44
            //   8b4504               | mov                 eax, dword ptr [ebp + 4]
            //   6a3a                 | push                0x3a
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_1 = { 85c0 89442418 7e61 8db7f4704100 68???????? 6800040000 56 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   7e61                 | jle                 0x63
            //   8db7f4704100         | lea                 esi, [edi + 0x4170f4]
            //   68????????           |                     
            //   6800040000           | push                0x400
            //   56                   | push                esi

        $sequence_2 = { 8bcb 4f c1e902 f3a5 8bcb 8d842454020000 }
            // n = 6, score = 100
            //   8bcb                 | mov                 ecx, ebx
            //   4f                   | dec                 edi
            //   c1e902               | shr                 ecx, 2
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8bcb                 | mov                 ecx, ebx
            //   8d842454020000       | lea                 eax, [esp + 0x254]

        $sequence_3 = { 83c408 e9???????? 8d542418 6a00 52 8d44241a 6a01 }
            // n = 7, score = 100
            //   83c408               | add                 esp, 8
            //   e9????????           |                     
            //   8d542418             | lea                 edx, [esp + 0x18]
            //   6a00                 | push                0
            //   52                   | push                edx
            //   8d44241a             | lea                 eax, [esp + 0x1a]
            //   6a01                 | push                1

        $sequence_4 = { 56 6802000080 ff15???????? 85c0 740d 5f }
            // n = 6, score = 100
            //   56                   | push                esi
            //   6802000080           | push                0x80000002
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   740d                 | je                  0xf
            //   5f                   | pop                 edi

        $sequence_5 = { 52 8b542428 8d8c24400a0000 50 51 6a01 52 }
            // n = 7, score = 100
            //   52                   | push                edx
            //   8b542428             | mov                 edx, dword ptr [esp + 0x28]
            //   8d8c24400a0000       | lea                 ecx, [esp + 0xa40]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   6a01                 | push                1
            //   52                   | push                edx

        $sequence_6 = { 6800040000 52 50 ff15???????? 85c0 0f8508feffff }
            // n = 6, score = 100
            //   6800040000           | push                0x400
            //   52                   | push                edx
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f8508feffff         | jne                 0xfffffe0e

        $sequence_7 = { ff5224 5f 5e 5d b804030980 }
            // n = 5, score = 100
            //   ff5224               | call                dword ptr [edx + 0x24]
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   b804030980           | mov                 eax, 0x80090304

        $sequence_8 = { 50 6a00 68???????? 51 ff15???????? 8d542418 52 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   6a00                 | push                0
            //   68????????           |                     
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8d542418             | lea                 edx, [esp + 0x18]
            //   52                   | push                edx

        $sequence_9 = { 0fbec8 fec0 4a 885c0c28 75e2 0fbed0 }
            // n = 6, score = 100
            //   0fbec8               | movsx               ecx, al
            //   fec0                 | inc                 al
            //   4a                   | dec                 edx
            //   885c0c28             | mov                 byte ptr [esp + ecx + 0x28], bl
            //   75e2                 | jne                 0xffffffe4
            //   0fbed0               | movsx               edx, al

    condition:
        7 of them and filesize < 212992
}