rule win_pushdo_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.pushdo."
        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.pushdo"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 50 ff15???????? 33d2 b9ffff0000 }
            // n = 4, score = 1300
            //   50                   | push                eax
            //   ff15????????         |                     
            //   33d2                 | xor                 edx, edx
            //   b9ffff0000           | mov                 ecx, 0xffff

        $sequence_1 = { f7f9 33c9 ba88020000 f7e2 0f90c1 f7d9 }
            // n = 6, score = 1300
            //   f7f9                 | idiv                ecx
            //   33c9                 | xor                 ecx, ecx
            //   ba88020000           | mov                 edx, 0x288
            //   f7e2                 | mul                 edx
            //   0f90c1               | seto                cl
            //   f7d9                 | neg                 ecx

        $sequence_2 = { 60 8b45fc b10b d3c0 61 }
            // n = 5, score = 1200
            //   60                   | pushal              
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   b10b                 | mov                 cl, 0xb
            //   d3c0                 | rol                 eax, cl
            //   61                   | popal               

        $sequence_3 = { 0fbe8c05f0feffff 8b45f4 0fbe8405f0feffff 03c8 81e1ff000000 }
            // n = 5, score = 800
            //   0fbe8c05f0feffff     | movsx               ecx, byte ptr [ebp + eax - 0x110]
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   0fbe8405f0feffff     | movsx               eax, byte ptr [ebp + eax - 0x110]
            //   03c8                 | add                 ecx, eax
            //   81e1ff000000         | and                 ecx, 0xff

        $sequence_4 = { 03c8 81e1ff000000 0fbe8c0df0feffff 33d1 8b450c 0345fc }
            // n = 6, score = 800
            //   03c8                 | add                 ecx, eax
            //   81e1ff000000         | and                 ecx, 0xff
            //   0fbe8c0df0feffff     | movsx               ecx, byte ptr [ebp + ecx - 0x110]
            //   33d1                 | xor                 edx, ecx
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   0345fc               | add                 eax, dword ptr [ebp - 4]

        $sequence_5 = { 8b45fc 33d2 f77518 8b4514 }
            // n = 4, score = 800
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   33d2                 | xor                 edx, edx
            //   f77518               | div                 dword ptr [ebp + 0x18]
            //   8b4514               | mov                 eax, dword ptr [ebp + 0x14]

        $sequence_6 = { 8b95e8feffff 8b45fc 8a8c05f0feffff 888c15f0feffff 8b55fc }
            // n = 5, score = 800
            //   8b95e8feffff         | mov                 edx, dword ptr [ebp - 0x118]
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8a8c05f0feffff       | mov                 cl, byte ptr [ebp + eax - 0x110]
            //   888c15f0feffff       | mov                 byte ptr [ebp + edx - 0x110], cl
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]

        $sequence_7 = { f77518 8b4514 0fbe1410 03ca 81e1ff000000 898de8feffff }
            // n = 6, score = 800
            //   f77518               | div                 dword ptr [ebp + 0x18]
            //   8b4514               | mov                 eax, dword ptr [ebp + 0x14]
            //   0fbe1410             | movsx               edx, byte ptr [eax + edx]
            //   03ca                 | add                 ecx, edx
            //   81e1ff000000         | and                 ecx, 0xff
            //   898de8feffff         | mov                 dword ptr [ebp - 0x118], ecx

        $sequence_8 = { be???????? 56 ff75fc c745f820000000 }
            // n = 4, score = 600
            //   be????????           |                     
            //   56                   | push                esi
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   c745f820000000       | mov                 dword ptr [ebp - 8], 0x20

        $sequence_9 = { 59 6a04 8945f8 8d45f8 }
            // n = 4, score = 600
            //   59                   | pop                 ecx
            //   6a04                 | push                4
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8d45f8               | lea                 eax, [ebp - 8]

        $sequence_10 = { 83ec24 33c0 8945e0 394508 0f84c1010000 }
            // n = 5, score = 600
            //   83ec24               | sub                 esp, 0x24
            //   33c0                 | xor                 eax, eax
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   394508               | cmp                 dword ptr [ebp + 8], eax
            //   0f84c1010000         | je                  0x1c7

        $sequence_11 = { 33c0 85ff 743a 53 8b5d0c 85db }
            // n = 6, score = 600
            //   33c0                 | xor                 eax, eax
            //   85ff                 | test                edi, edi
            //   743a                 | je                  0x3c
            //   53                   | push                ebx
            //   8b5d0c               | mov                 ebx, dword ptr [ebp + 0xc]
            //   85db                 | test                ebx, ebx

        $sequence_12 = { 8b4608 8945e0 8b4614 8945ec 8b460c 8945e4 }
            // n = 6, score = 600
            //   8b4608               | mov                 eax, dword ptr [esi + 8]
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   8b4614               | mov                 eax, dword ptr [esi + 0x14]
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax
            //   8b460c               | mov                 eax, dword ptr [esi + 0xc]
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax

        $sequence_13 = { 52 8d8588fbffff 50 e8???????? }
            // n = 4, score = 500
            //   52                   | push                edx
            //   8d8588fbffff         | lea                 eax, [ebp - 0x478]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_14 = { eb67 eb93 6a00 6a04 8d4de0 }
            // n = 5, score = 200
            //   eb67                 | jmp                 0x69
            //   eb93                 | jmp                 0xffffff95
            //   6a00                 | push                0
            //   6a04                 | push                4
            //   8d4de0               | lea                 ecx, [ebp - 0x20]

        $sequence_15 = { 894de8 8b5514 0355e4 895514 8b4518 2b45e4 894518 }
            // n = 7, score = 200
            //   894de8               | mov                 dword ptr [ebp - 0x18], ecx
            //   8b5514               | mov                 edx, dword ptr [ebp + 0x14]
            //   0355e4               | add                 edx, dword ptr [ebp - 0x1c]
            //   895514               | mov                 dword ptr [ebp + 0x14], edx
            //   8b4518               | mov                 eax, dword ptr [ebp + 0x18]
            //   2b45e4               | sub                 eax, dword ptr [ebp - 0x1c]
            //   894518               | mov                 dword ptr [ebp + 0x18], eax

        $sequence_16 = { 0fbe08 85c9 0f84ba010000 8b5508 8955fc }
            // n = 5, score = 200
            //   0fbe08               | movsx               ecx, byte ptr [eax]
            //   85c9                 | test                ecx, ecx
            //   0f84ba010000         | je                  0x1c0
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   8955fc               | mov                 dword ptr [ebp - 4], edx

        $sequence_17 = { 50 8b0d???????? 51 8b15???????? 52 8b854cfeffff 50 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8b0d????????         |                     
            //   51                   | push                ecx
            //   8b15????????         |                     
            //   52                   | push                edx
            //   8b854cfeffff         | mov                 eax, dword ptr [ebp - 0x1b4]
            //   50                   | push                eax

        $sequence_18 = { 7e2d 0fbe4d08 83f930 7c09 0fbe5508 83fa39 }
            // n = 6, score = 200
            //   7e2d                 | jle                 0x2f
            //   0fbe4d08             | movsx               ecx, byte ptr [ebp + 8]
            //   83f930               | cmp                 ecx, 0x30
            //   7c09                 | jl                  0xb
            //   0fbe5508             | movsx               edx, byte ptr [ebp + 8]
            //   83fa39               | cmp                 edx, 0x39

        $sequence_19 = { ff15???????? 898524feffff 83bd24feffff00 7552 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   898524feffff         | mov                 dword ptr [ebp - 0x1dc], eax
            //   83bd24feffff00       | cmp                 dword ptr [ebp - 0x1dc], 0
            //   7552                 | jne                 0x54

        $sequence_20 = { 50 e8???????? 8945b8 68???????? 8b4db8 }
            // n = 5, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   8945b8               | mov                 dword ptr [ebp - 0x48], eax
            //   68????????           |                     
            //   8b4db8               | mov                 ecx, dword ptr [ebp - 0x48]

    condition:
        7 of them and filesize < 163840
}