rule win_sidewalk_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.sidewalk."
        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.sidewalk"
        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 = { c1e810 880a c1e918 884202 884a03 4183f810 }
            // n = 6, score = 200
            //   c1e810               | jne                 0xffffffde
            //   880a                 | dec                 eax
            //   c1e918               | arpl                word ptr [ebp + 0x7f], ax
            //   884202               | xor                 ebx, ebx
            //   884a03               | inc                 ecx
            //   4183f810             | mov                 byte ptr [eax + ecx], al

        $sequence_1 = { 0bc8 41890c10 488d5204 4983e901 75d4 4863457f }
            // n = 6, score = 200
            //   0bc8                 | or                  ecx, eax
            //   41890c10             | inc                 ecx
            //   488d5204             | mov                 dword ptr [eax + edx], ecx
            //   4983e901             | dec                 eax
            //   75d4                 | lea                 edx, [edx + 4]
            //   4863457f             | dec                 ecx

        $sequence_2 = { 4489750f 44897d03 448965ff 44896dfb }
            // n = 4, score = 200
            //   4489750f             | sub                 ecx, 1
            //   44897d03             | jne                 0xffffffd6
            //   448965ff             | dec                 eax
            //   44896dfb             | arpl                word ptr [ebp + 0x7f], ax

        $sequence_3 = { 8bc2 33c6 c1c010 4403d8 }
            // n = 4, score = 200
            //   8bc2                 | jge                 0x17
            //   33c6                 | mov                 al, byte ptr [edi + ecx]
            //   c1c010               | xor                 al, byte ptr [ecx]
            //   4403d8               | inc                 ecx

        $sequence_4 = { 3201 41880408 48ffc1 488d040a }
            // n = 4, score = 200
            //   3201                 | dec                 eax
            //   41880408             | lea                 edx, [edx + 4]
            //   48ffc1               | inc                 ecx
            //   488d040a             | mov                 ecx, dword ptr [ecx]

        $sequence_5 = { c1c010 4403d8 4133db c1c30c 03d3 8bf2 }
            // n = 6, score = 200
            //   c1c010               | shl                 eax, 2
            //   4403d8               | dec                 ebp
            //   4133db               | lea                 ecx, [ecx + 4]
            //   c1c30c               | mov                 eax, ecx
            //   03d3                 | shr                 eax, 0x10
            //   8bf2                 | mov                 byte ptr [edx], cl

        $sequence_6 = { c1c708 4403df 458bc3 4433c0 418bc5 }
            // n = 5, score = 200
            //   c1c708               | dec                 esp
            //   4403df               | lea                 ecx, [ebp - 0x29]
            //   458bc3               | inc                 ecx
            //   4433c0               | mov                 ecx, dword ptr [ecx]
            //   418bc5               | inc                 ecx

        $sequence_7 = { 418b09 418bc0 c1e002 4d8d4904 }
            // n = 4, score = 200
            //   418b09               | cmp                 eax, esi
            //   418bc0               | jl                  0xffffffe4
            //   c1e002               | dec                 eax
            //   4d8d4904             | add                 esi, 0x40

        $sequence_8 = { c1c608 c1c010 4403de 4403e8 4133db }
            // n = 5, score = 200
            //   c1c608               | jl                  0xffffffeb
            //   c1c010               | dec                 eax
            //   4403de               | add                 esi, 0x40
            //   4403e8               | dec                 eax
            //   4133db               | add                 ebx, 0x40

        $sequence_9 = { c1c610 4433f2 c1c710 4403df }
            // n = 4, score = 200
            //   c1c610               | lea                 eax, [edx + ecx]
            //   4433f2               | dec                 eax
            //   c1c710               | cmp                 eax, esi
            //   4403df               | jl                  0xffffffee

        $sequence_10 = { c1c710 4403df 41c1c610 4503e6 4403cb 4533d1 4403ee }
            // n = 7, score = 200
            //   c1c710               | add                 esi, 0x40
            //   4403df               | dec                 eax
            //   41c1c610             | inc                 ecx
            //   4503e6               | dec                 eax
            //   4403cb               | lea                 eax, [edx + ecx]
            //   4533d1               | dec                 eax
            //   4403ee               | cmp                 eax, esi

        $sequence_11 = { 0fb642fe c1e108 0bc8 41890c10 }
            // n = 4, score = 200
            //   0fb642fe             | shl                 ecx, 8
            //   c1e108               | or                  ecx, eax
            //   0bc8                 | inc                 ecx
            //   41890c10             | mov                 dword ptr [eax + edx], ecx

        $sequence_12 = { 483bc6 7ce2 4883c640 4883c340 }
            // n = 4, score = 200
            //   483bc6               | inc                 esp
            //   7ce2                 | mov                 dword ptr [ebp + 0xf], esi
            //   4883c640             | inc                 esp
            //   4883c340             | mov                 dword ptr [ebp + 3], edi

        $sequence_13 = { 48ffc1 488d040a 483bc6 7ce2 }
            // n = 4, score = 200
            //   48ffc1               | add                 esi, 0x40
            //   488d040a             | or                  ecx, eax
            //   483bc6               | inc                 ecx
            //   7ce2                 | mov                 dword ptr [eax + edx], ecx

        $sequence_14 = { 33d0 418bc7 33c3 c1c207 c1c00c 4403c8 4533d1 }
            // n = 7, score = 200
            //   33d0                 | dec                 esp
            //   418bc7               | lea                 ecx, [ebp - 0x29]
            //   33c3                 | inc                 ecx
            //   c1c207               | mov                 ecx, dword ptr [ecx]
            //   c1c00c               | inc                 ecx
            //   4403c8               | mov                 eax, eax
            //   4533d1               | shl                 eax, 2

        $sequence_15 = { 4403c8 4533d1 41c1c208 4503fa 418bdf 33d8 }
            // n = 6, score = 200
            //   4403c8               | dec                 eax
            //   4533d1               | lea                 eax, [edx + ecx]
            //   41c1c208             | dec                 eax
            //   4503fa               | cmp                 eax, esi
            //   418bdf               | jl                  0xffffffeb
            //   33d8                 | dec                 eax

    condition:
        7 of them and filesize < 237568
}