rule win_dairy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        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 = "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 = { 85c0 0f84f2050000 a1???????? 83e800 0f84e1000000 48 }
            // n = 6, score = 100
            //   85c0                 | test                eax, eax
            //   0f84f2050000         | je                  0x5f8
            //   a1????????           |                     
            //   83e800               | sub                 eax, 0
            //   0f84e1000000         | je                  0xe7
            //   48                   | dec                 eax

        $sequence_1 = { 8d442400 8d4c2404 50 6800100000 51 }
            // n = 5, score = 100
            //   8d442400             | lea                 eax, [esp]
            //   8d4c2404             | lea                 ecx, [esp + 4]
            //   50                   | push                eax
            //   6800100000           | push                0x1000
            //   51                   | push                ecx

        $sequence_2 = { 33f3 8b5c2414 03c6 8bf0 c1ee05 03f3 8bd8 }
            // n = 7, score = 100
            //   33f3                 | xor                 esi, ebx
            //   8b5c2414             | mov                 ebx, dword ptr [esp + 0x14]
            //   03c6                 | add                 eax, esi
            //   8bf0                 | mov                 esi, eax
            //   c1ee05               | shr                 esi, 5
            //   03f3                 | add                 esi, ebx
            //   8bd8                 | mov                 ebx, eax

        $sequence_3 = { 55 ffd3 3d83000000 7462 }
            // n = 4, score = 100
            //   55                   | push                ebp
            //   ffd3                 | call                ebx
            //   3d83000000           | cmp                 eax, 0x83
            //   7462                 | je                  0x64

        $sequence_4 = { 8d0480 8d0480 8d0480 8d0cc0 }
            // n = 4, score = 100
            //   8d0480               | lea                 eax, [eax + eax*4]
            //   8d0480               | lea                 eax, [eax + eax*4]
            //   8d0480               | lea                 eax, [eax + eax*4]
            //   8d0cc0               | lea                 ecx, [eax + eax*8]

        $sequence_5 = { 83c408 eb2f 8bb42438030000 8d842430010000 }
            // n = 4, score = 100
            //   83c408               | add                 esp, 8
            //   eb2f                 | jmp                 0x31
            //   8bb42438030000       | mov                 esi, dword ptr [esp + 0x338]
            //   8d842430010000       | lea                 eax, [esp + 0x130]

        $sequence_6 = { 52 ff5040 895c2428 81fe18030980 0f8495feffff }
            // n = 5, score = 100
            //   52                   | push                edx
            //   ff5040               | call                dword ptr [eax + 0x40]
            //   895c2428             | mov                 dword ptr [esp + 0x28], ebx
            //   81fe18030980         | cmp                 esi, 0x80090318
            //   0f8495feffff         | je                  0xfffffe9b

        $sequence_7 = { c644241169 c644241264 c64424133a c644241400 f2ae f7d1 2bf9 }
            // n = 7, score = 100
            //   c644241169           | mov                 byte ptr [esp + 0x11], 0x69
            //   c644241264           | mov                 byte ptr [esp + 0x12], 0x64
            //   c64424133a           | mov                 byte ptr [esp + 0x13], 0x3a
            //   c644241400           | mov                 byte ptr [esp + 0x14], 0
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   f7d1                 | not                 ecx
            //   2bf9                 | sub                 edi, ecx

        $sequence_8 = { 85c0 7594 8b742448 8b0d???????? 56 ff5110 8b542414 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   7594                 | jne                 0xffffff96
            //   8b742448             | mov                 esi, dword ptr [esp + 0x48]
            //   8b0d????????         |                     
            //   56                   | push                esi
            //   ff5110               | call                dword ptr [ecx + 0x10]
            //   8b542414             | mov                 edx, dword ptr [esp + 0x14]

        $sequence_9 = { 894c2420 f3ab 8b8424401c0000 50 6a00 6810040000 ff15???????? }
            // n = 7, score = 100
            //   894c2420             | mov                 dword ptr [esp + 0x20], ecx
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8b8424401c0000       | mov                 eax, dword ptr [esp + 0x1c40]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6810040000           | push                0x410
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 212992
}