rule win_graphican_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.graphican."
        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.graphican"
        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 = { 56 57 8d7818 8b4710 2b470c 83f810 7d05 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   57                   | push                edi
            //   8d7818               | lea                 edi, [eax + 0x18]
            //   8b4710               | mov                 eax, dword ptr [edi + 0x10]
            //   2b470c               | sub                 eax, dword ptr [edi + 0xc]
            //   83f810               | cmp                 eax, 0x10
            //   7d05                 | jge                 7

        $sequence_1 = { ffd0 85c0 7846 8b85d0efffff 8b08 8d95c8efffff 52 }
            // n = 7, score = 200
            //   ffd0                 | call                eax
            //   85c0                 | test                eax, eax
            //   7846                 | js                  0x48
            //   8b85d0efffff         | mov                 eax, dword ptr [ebp - 0x1030]
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   8d95c8efffff         | lea                 edx, [ebp - 0x1038]
            //   52                   | push                edx

        $sequence_2 = { 837e1800 7521 8bd7 e8???????? 837e1800 7514 8b07 }
            // n = 7, score = 200
            //   837e1800             | cmp                 dword ptr [esi + 0x18], 0
            //   7521                 | jne                 0x23
            //   8bd7                 | mov                 edx, edi
            //   e8????????           |                     
            //   837e1800             | cmp                 dword ptr [esi + 0x18], 0
            //   7514                 | jne                 0x16
            //   8b07                 | mov                 eax, dword ptr [edi]

        $sequence_3 = { 68???????? 68???????? e8???????? 83c40c c7431809000000 89731c 837b1800 }
            // n = 7, score = 200
            //   68????????           |                     
            //   68????????           |                     
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   c7431809000000       | mov                 dword ptr [ebx + 0x18], 9
            //   89731c               | mov                 dword ptr [ebx + 0x1c], esi
            //   837b1800             | cmp                 dword ptr [ebx + 0x18], 0

        $sequence_4 = { 7517 8b45fc ff07 40 8945fc 83f804 }
            // n = 6, score = 200
            //   7517                 | jne                 0x19
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   ff07                 | inc                 dword ptr [edi]
            //   40                   | inc                 eax
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   83f804               | cmp                 eax, 4

        $sequence_5 = { 83c408 85c0 7428 53 e8???????? 83c404 83bde8efffff10 }
            // n = 7, score = 200
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax
            //   7428                 | je                  0x2a
            //   53                   | push                ebx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   83bde8efffff10       | cmp                 dword ptr [ebp - 0x1018], 0x10

        $sequence_6 = { 3c30 7c24 3c39 7f1a 0fbec0 83e830 8945e0 }
            // n = 7, score = 200
            //   3c30                 | cmp                 al, 0x30
            //   7c24                 | jl                  0x26
            //   3c39                 | cmp                 al, 0x39
            //   7f1a                 | jg                  0x1c
            //   0fbec0               | movsx               eax, al
            //   83e830               | sub                 eax, 0x30
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax

        $sequence_7 = { 8bec 53 8b1d???????? 6a00 6a00 6a00 6a00 }
            // n = 7, score = 200
            //   8bec                 | mov                 ebp, esp
            //   53                   | push                ebx
            //   8b1d????????         |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_8 = { 5f b001 5e c3 8bd7 83fe04 }
            // n = 6, score = 200
            //   5f                   | pop                 edi
            //   b001                 | mov                 al, 1
            //   5e                   | pop                 esi
            //   c3                   | ret                 
            //   8bd7                 | mov                 edx, edi
            //   83fe04               | cmp                 esi, 4

        $sequence_9 = { e8???????? 83c40c c7431809000000 89731c }
            // n = 4, score = 200
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   c7431809000000       | mov                 dword ptr [ebx + 0x18], 9
            //   89731c               | mov                 dword ptr [ebx + 0x1c], esi

    condition:
        7 of them and filesize < 362496
}