rule win_pushdo_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = 1200
            //   50                   | push                eax
            //   ff15????????         |                     
            //   33d2                 | xor                 edx, edx
            //   b9ffff0000           | mov                 ecx, 0xffff

        $sequence_1 = { f7f9 33c9 ba88020000 f7e2 0f90c1 f7d9 }
            // n = 6, score = 1200
            //   f7f9                 | idiv                ecx
            //   33c9                 | xor                 ecx, ecx
            //   ba88020000           | mov                 edx, 0x288
            //   f7e2                 | mul                 edx
            //   0f90c1               | seto                cl
            //   f7d9                 | neg                 ecx

        $sequence_2 = { 8b45fc b10b d3c0 61 }
            // n = 4, score = 1100
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   b10b                 | mov                 cl, 0xb
            //   d3c0                 | rol                 eax, cl
            //   61                   | popal               

        $sequence_3 = { 8955fc 817dfc00010000 736a 8b45fc 0fbe8c05f0feffff }
            // n = 5, score = 800
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   817dfc00010000       | cmp                 dword ptr [ebp - 4], 0x100
            //   736a                 | jae                 0x6c
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   0fbe8c05f0feffff     | movsx               ecx, byte ptr [ebp + eax - 0x110]

        $sequence_4 = { 894dfc 8b55fc 3b5510 0f83a6000000 8b45f4 83c001 25ff000000 }
            // n = 7, score = 800
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   3b5510               | cmp                 edx, dword ptr [ebp + 0x10]
            //   0f83a6000000         | jae                 0xac
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   83c001               | add                 eax, 1
            //   25ff000000           | and                 eax, 0xff

        $sequence_5 = { 0fbe940df0feffff 0395e8feffff 81e2ff000000 8995e8feffff 8b45f4 8a8c05f0feffff }
            // n = 6, score = 800
            //   0fbe940df0feffff     | movsx               edx, byte ptr [ebp + ecx - 0x110]
            //   0395e8feffff         | add                 edx, dword ptr [ebp - 0x118]
            //   81e2ff000000         | and                 edx, 0xff
            //   8995e8feffff         | mov                 dword ptr [ebp - 0x118], edx
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   8a8c05f0feffff       | mov                 cl, byte ptr [ebp + eax - 0x110]

        $sequence_6 = { 7d12 8b55f8 8d85f0feffff 2bd0 }
            // n = 4, score = 800
            //   7d12                 | jge                 0x14
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   8d85f0feffff         | lea                 eax, [ebp - 0x110]
            //   2bd0                 | sub                 edx, eax

        $sequence_7 = { 888deffeffff 8b55f4 8b85e8feffff 8a8c05f0feffff 888c15f0feffff 8b95e8feffff }
            // n = 6, score = 800
            //   888deffeffff         | mov                 byte ptr [ebp - 0x111], cl
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   8b85e8feffff         | mov                 eax, dword ptr [ebp - 0x118]
            //   8a8c05f0feffff       | mov                 cl, byte ptr [ebp + eax - 0x110]
            //   888c15f0feffff       | mov                 byte ptr [ebp + edx - 0x110], cl
            //   8b95e8feffff         | mov                 edx, dword ptr [ebp - 0x118]

        $sequence_8 = { 55 e8???????? 6a20 e8???????? 8b0e }
            // n = 5, score = 500
            //   55                   | push                ebp
            //   e8????????           |                     
            //   6a20                 | push                0x20
            //   e8????????           |                     
            //   8b0e                 | mov                 ecx, dword ptr [esi]

        $sequence_9 = { 50 e8???????? 83c40c f6460c08 746d 6a10 e8???????? }
            // n = 7, score = 500
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   f6460c08             | test                byte ptr [esi + 0xc], 8
            //   746d                 | je                  0x6f
            //   6a10                 | push                0x10
            //   e8????????           |                     

        $sequence_10 = { 56 33c0 57 395d08 0f8417010000 8b4d0c 3bcb }
            // n = 7, score = 500
            //   56                   | push                esi
            //   33c0                 | xor                 eax, eax
            //   57                   | push                edi
            //   395d08               | cmp                 dword ptr [ebp + 8], ebx
            //   0f8417010000         | je                  0x11d
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   3bcb                 | cmp                 ecx, ebx

        $sequence_11 = { 756a 6a10 5e 8d45f4 50 8d45d4 }
            // n = 6, score = 500
            //   756a                 | jne                 0x6c
            //   6a10                 | push                0x10
            //   5e                   | pop                 esi
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   50                   | push                eax
            //   8d45d4               | lea                 eax, [ebp - 0x2c]

        $sequence_12 = { 52 8d8588fbffff 50 e8???????? }
            // n = 4, score = 500
            //   52                   | push                edx
            //   8d8588fbffff         | lea                 eax, [ebp - 0x478]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_13 = { 395d00 7424 8b460c 53 53 }
            // n = 5, score = 500
            //   395d00               | cmp                 dword ptr [ebp], ebx
            //   7424                 | je                  0x26
            //   8b460c               | mov                 eax, dword ptr [esi + 0xc]
            //   53                   | push                ebx
            //   53                   | push                ebx

        $sequence_14 = { eb13 8b55fc 83c201 8955fc 0fb745f8 d1e0 }
            // n = 6, score = 200
            //   eb13                 | jmp                 0x15
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   83c201               | add                 edx, 1
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   0fb745f8             | movzx               eax, word ptr [ebp - 8]
            //   d1e0                 | shl                 eax, 1

        $sequence_15 = { 6a04 8d55f8 52 8b856cfdffff 83c008 50 8b4de4 }
            // n = 7, score = 200
            //   6a04                 | push                4
            //   8d55f8               | lea                 edx, [ebp - 8]
            //   52                   | push                edx
            //   8b856cfdffff         | mov                 eax, dword ptr [ebp - 0x294]
            //   83c008               | add                 eax, 8
            //   50                   | push                eax
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]

        $sequence_16 = { 83c203 81e203000080 7905 4a 83cafc 42 b804000000 }
            // n = 7, score = 200
            //   83c203               | add                 edx, 3
            //   81e203000080         | and                 edx, 0x80000003
            //   7905                 | jns                 7
            //   4a                   | dec                 edx
            //   83cafc               | or                  edx, 0xfffffffc
            //   42                   | inc                 edx
            //   b804000000           | mov                 eax, 4

        $sequence_17 = { 83c104 894dec c745f400000000 eb12 }
            // n = 4, score = 200
            //   83c104               | add                 ecx, 4
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   c745f400000000       | mov                 dword ptr [ebp - 0xc], 0
            //   eb12                 | jmp                 0x14

        $sequence_18 = { 8b55e0 035128 899578fdffff 8d85c8fcffff }
            // n = 4, score = 200
            //   8b55e0               | mov                 edx, dword ptr [ebp - 0x20]
            //   035128               | add                 edx, dword ptr [ecx + 0x28]
            //   899578fdffff         | mov                 dword ptr [ebp - 0x288], edx
            //   8d85c8fcffff         | lea                 eax, [ebp - 0x338]

        $sequence_19 = { 41 ba10000000 2bd1 83ea01 }
            // n = 4, score = 200
            //   41                   | inc                 ecx
            //   ba10000000           | mov                 edx, 0x10
            //   2bd1                 | sub                 edx, ecx
            //   83ea01               | sub                 edx, 1

        $sequence_20 = { e8???????? 894508 8b550c 81e2ffff0000 52 }
            // n = 5, score = 200
            //   e8????????           |                     
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   81e2ffff0000         | and                 edx, 0xffff
            //   52                   | push                edx

    condition:
        7 of them and filesize < 163840
}