rule win_comebacker_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.comebacker."
        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.comebacker"
        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 = { 7f04 0430 eb02 0437 }
            // n = 4, score = 500
            //   7f04                 | jg                  6
            //   0430                 | add                 al, 0x30
            //   eb02                 | jmp                 4
            //   0437                 | add                 al, 0x37

        $sequence_1 = { 4d85c0 7526 418d5072 4c8d0de4d40300 c7442420f2020000 448d42d0 }
            // n = 6, score = 400
            //   4d85c0               | dec                 eax
            //   7526                 | mov                 ecx, edx
            //   418d5072             | dec                 esp
            //   4c8d0de4d40300       | lea                 ebp, [0x3a6ef]
            //   c7442420f2020000     | nop                 dword ptr [eax]
            //   448d42d0             | dec                 ebp

        $sequence_2 = { 4c8bc3 66f2af 33ff 488d442440 }
            // n = 4, score = 400
            //   4c8bc3               | dec                 esp
            //   66f2af               | mov                 eax, ebx
            //   33ff                 | repne scasd         eax, dword ptr es:[edi]
            //   488d442440           | xor                 edi, edi

        $sequence_3 = { 442bc1 488bca 4c8d2defa60300 0f1f8000000000 }
            // n = 4, score = 400
            //   442bc1               | dec                 eax
            //   488bca               | lea                 eax, [esp + 0x40]
            //   4c8d2defa60300       | inc                 esp
            //   0f1f8000000000       | sub                 eax, ecx

        $sequence_4 = { 4885c0 7522 4c8d0d85f80300 8d5075 8d4804 448d4041 }
            // n = 6, score = 400
            //   4885c0               | test                eax, eax
            //   7522                 | jne                 0x28
            //   4c8d0d85f80300       | inc                 ecx
            //   8d5075               | lea                 edx, [eax + 0x72]
            //   8d4804               | dec                 esp
            //   448d4041             | lea                 ecx, [0x3d4e4]

        $sequence_5 = { 33d2 41b806020000 885dd0 488945d1 8945d9 }
            // n = 5, score = 400
            //   33d2                 | mov                 dword ptr [esp + 0x20], 0x2f2
            //   41b806020000         | inc                 esp
            //   885dd0               | lea                 eax, [edx - 0x30]
            //   488945d1             | dec                 eax
            //   8945d9               | test                eax, eax

        $sequence_6 = { ba67000000 4c8d0d0ac80200 c7442420ab030000 8d4aa9 448d42ff e8???????? }
            // n = 6, score = 400
            //   ba67000000           | lea                 ecx, [eax + 4]
            //   4c8d0d0ac80200       | inc                 esp
            //   c7442420ab030000     | lea                 eax, [eax + 0x41]
            //   8d4aa9               | xor                 edx, edx
            //   448d42ff             | inc                 ecx
            //   e8????????           |                     

        $sequence_7 = { 4c8be8 ff15???????? 488d156de10200 488bcb 488bf8 ff15???????? }
            // n = 6, score = 400
            //   4c8be8               | jne                 0x24
            //   ff15????????         |                     
            //   488d156de10200       | dec                 esp
            //   488bcb               | lea                 ecx, [0x3f885]
            //   488bf8               | lea                 edx, [eax + 0x75]
            //   ff15????????         |                     

        $sequence_8 = { 6aff 68???????? 6800020000 53 ff15???????? e8???????? 3bc3 }
            // n = 7, score = 100
            //   6aff                 | push                -1
            //   68????????           |                     
            //   6800020000           | push                0x200
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   e8????????           |                     
            //   3bc3                 | cmp                 eax, ebx

        $sequence_9 = { 8944242c 8b1c9538500410 8b542414 c1ea18 }
            // n = 4, score = 100
            //   8944242c             | mov                 dword ptr [esp + 0x2c], eax
            //   8b1c9538500410       | mov                 ebx, dword ptr [edx*4 + 0x10045038]
            //   8b542414             | mov                 edx, dword ptr [esp + 0x14]
            //   c1ea18               | shr                 edx, 0x18

        $sequence_10 = { e8???????? 83c40c 8d8d8cf6ffff 51 8d55e8 52 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8d8d8cf6ffff         | lea                 ecx, [ebp - 0x974]
            //   51                   | push                ecx
            //   8d55e8               | lea                 edx, [ebp - 0x18]
            //   52                   | push                edx

        $sequence_11 = { 83c43c 8903 5f 8bc6 33cd 5e }
            // n = 6, score = 100
            //   83c43c               | add                 esp, 0x3c
            //   8903                 | mov                 dword ptr [ebx], eax
            //   5f                   | pop                 edi
            //   8bc6                 | mov                 eax, esi
            //   33cd                 | xor                 ecx, ebp
            //   5e                   | pop                 esi

        $sequence_12 = { 8b0485e01f0910 c644080401 57 e8???????? }
            // n = 4, score = 100
            //   8b0485e01f0910       | mov                 eax, dword ptr [eax*4 + 0x10091fe0]
            //   c644080401           | mov                 byte ptr [eax + ecx + 4], 1
            //   57                   | push                edi
            //   e8????????           |                     

        $sequence_13 = { 6a00 6a00 8bf0 8d8570ffffff 6a00 50 e8???????? }
            // n = 7, score = 100
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   8bf0                 | mov                 esi, eax
            //   8d8570ffffff         | lea                 eax, [ebp - 0x90]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_14 = { 03c0 8d9dc8f8ffff 8985c8f8ffff e8???????? 8bbdc8f8ffff 6802200300 }
            // n = 6, score = 100
            //   03c0                 | add                 eax, eax
            //   8d9dc8f8ffff         | lea                 ebx, [ebp - 0x738]
            //   8985c8f8ffff         | mov                 dword ptr [ebp - 0x738], eax
            //   e8????????           |                     
            //   8bbdc8f8ffff         | mov                 edi, dword ptr [ebp - 0x738]
            //   6802200300           | push                0x32002

    condition:
        7 of them and filesize < 1429504
}