rule win_flagpro_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.flagpro."
        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.flagpro"
        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 = { 8b03 eb02 8bc3 55 8d2c3f 55 }
            // n = 6, score = 100
            //   8b03                 | mov                 eax, dword ptr [ebx]
            //   eb02                 | jmp                 4
            //   8bc3                 | mov                 eax, ebx
            //   55                   | push                ebp
            //   8d2c3f               | lea                 ebp, [edi + edi]
            //   55                   | push                ebp

        $sequence_1 = { 8b44241c 8b08 8b5108 50 ffd2 8d442420 }
            // n = 6, score = 100
            //   8b44241c             | mov                 eax, dword ptr [esp + 0x1c]
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   8b5108               | mov                 edx, dword ptr [ecx + 8]
            //   50                   | push                eax
            //   ffd2                 | call                edx
            //   8d442420             | lea                 eax, [esp + 0x20]

        $sequence_2 = { 8b442418 8b4c244c 8901 8d44241c }
            // n = 4, score = 100
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   8b4c244c             | mov                 ecx, dword ptr [esp + 0x4c]
            //   8901                 | mov                 dword ptr [ecx], eax
            //   8d44241c             | lea                 eax, [esp + 0x1c]

        $sequence_3 = { 52 e8???????? 83c404 33f6 895c2474 }
            // n = 5, score = 100
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   33f6                 | xor                 esi, esi
            //   895c2474             | mov                 dword ptr [esp + 0x74], ebx

        $sequence_4 = { 8bff 55 8bec 8b4508 56 8d34c550d84100 }
            // n = 6, score = 100
            //   8bff                 | mov                 edi, edi
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   56                   | push                esi
            //   8d34c550d84100       | lea                 esi, [eax*8 + 0x41d850]

        $sequence_5 = { 3b5c2414 0f8274feffff 8b542410 52 ff15???????? }
            // n = 5, score = 100
            //   3b5c2414             | cmp                 ebx, dword ptr [esp + 0x14]
            //   0f8274feffff         | jb                  0xfffffe7a
            //   8b542410             | mov                 edx, dword ptr [esp + 0x10]
            //   52                   | push                edx
            //   ff15????????         |                     

        $sequence_6 = { 8b4148 ffd0 8b442434 3bc3 7425 8d542448 52 }
            // n = 7, score = 100
            //   8b4148               | mov                 eax, dword ptr [ecx + 0x48]
            //   ffd0                 | call                eax
            //   8b442434             | mov                 eax, dword ptr [esp + 0x34]
            //   3bc3                 | cmp                 eax, ebx
            //   7425                 | je                  0x27
            //   8d542448             | lea                 edx, [esp + 0x48]
            //   52                   | push                edx

        $sequence_7 = { 3de8030000 0f8ee3010000 8d9017fcffff b8d34d6210 f7e2 c1ea06 42 }
            // n = 7, score = 100
            //   3de8030000           | cmp                 eax, 0x3e8
            //   0f8ee3010000         | jle                 0x1e9
            //   8d9017fcffff         | lea                 edx, [eax - 0x3e9]
            //   b8d34d6210           | mov                 eax, 0x10624dd3
            //   f7e2                 | mul                 edx
            //   c1ea06               | shr                 edx, 6
            //   42                   | inc                 edx

        $sequence_8 = { 8b06 3b78f8 7f11 8978f4 8b0e 33d2 66891479 }
            // n = 7, score = 100
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   3b78f8               | cmp                 edi, dword ptr [eax - 8]
            //   7f11                 | jg                  0x13
            //   8978f4               | mov                 dword ptr [eax - 0xc], edi
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   33d2                 | xor                 edx, edx
            //   66891479             | mov                 word ptr [ecx + edi*2], dx

        $sequence_9 = { 52 ff15???????? 8b8c24841c0000 5f 5e 5d 5b }
            // n = 7, score = 100
            //   52                   | push                edx
            //   ff15????????         |                     
            //   8b8c24841c0000       | mov                 ecx, dword ptr [esp + 0x1c84]
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   5b                   | pop                 ebx

    condition:
        7 of them and filesize < 1411072
}