rule win_doublefantasy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.doublefantasy."
        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.doublefantasy"
        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 = { c1e204 0bd6 837c241001 8a92908c2700 }
            // n = 4, score = 200
            //   c1e204               | shl                 edx, 4
            //   0bd6                 | or                  edx, esi
            //   837c241001           | cmp                 dword ptr [esp + 0x10], 1
            //   8a92908c2700         | mov                 dl, byte ptr [edx + 0x278c90]

        $sequence_1 = { c9 c3 8b442404 0fb608 c1e902 8a91908c2700 8b4c2408 }
            // n = 7, score = 200
            //   c9                   | leave               
            //   c3                   | ret                 
            //   8b442404             | mov                 eax, dword ptr [esp + 4]
            //   0fb608               | movzx               ecx, byte ptr [eax]
            //   c1e902               | shr                 ecx, 2
            //   8a91908c2700         | mov                 dl, byte ptr [ecx + 0x278c90]
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]

        $sequence_2 = { 7509 c745e4fdffffff eb7d ff7518 56 50 e8???????? }
            // n = 7, score = 200
            //   7509                 | jne                 0xb
            //   c745e4fdffffff       | mov                 dword ptr [ebp - 0x1c], 0xfffffffd
            //   eb7d                 | jmp                 0x7f
            //   ff7518               | push                dword ptr [ebp + 0x18]
            //   56                   | push                esi
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_3 = { 8bec 83ec0c a1???????? 85c0 7522 68???????? }
            // n = 6, score = 200
            //   8bec                 | mov                 ebp, esp
            //   83ec0c               | sub                 esp, 0xc
            //   a1????????           |                     
            //   85c0                 | test                eax, eax
            //   7522                 | jne                 0x24
            //   68????????           |                     

        $sequence_4 = { c1e202 0bd6 8a92908c2700 eb02 b23d 837c241002 }
            // n = 6, score = 200
            //   c1e202               | shl                 edx, 2
            //   0bd6                 | or                  edx, esi
            //   8a92908c2700         | mov                 dl, byte ptr [edx + 0x278c90]
            //   eb02                 | jmp                 4
            //   b23d                 | mov                 dl, 0x3d
            //   837c241002           | cmp                 dword ptr [esp + 0x10], 2

        $sequence_5 = { 8a91908c2700 8b4c2408 8811 33d2 8a10 }
            // n = 5, score = 200
            //   8a91908c2700         | mov                 dl, byte ptr [ecx + 0x278c90]
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]
            //   8811                 | mov                 byte ptr [ecx], dl
            //   33d2                 | xor                 edx, edx
            //   8a10                 | mov                 dl, byte ptr [eax]

        $sequence_6 = { 51 56 57 8b7d14 33f6 813f00280000 8975fc }
            // n = 7, score = 200
            //   51                   | push                ecx
            //   56                   | push                esi
            //   57                   | push                edi
            //   8b7d14               | mov                 edi, dword ptr [ebp + 0x14]
            //   33f6                 | xor                 esi, esi
            //   813f00280000         | cmp                 dword ptr [edi], 0x2800
            //   8975fc               | mov                 dword ptr [ebp - 4], esi

        $sequence_7 = { 0fb64002 83e03f 8a80908c2700 eb02 }
            // n = 4, score = 200
            //   0fb64002             | movzx               eax, byte ptr [eax + 2]
            //   83e03f               | and                 eax, 0x3f
            //   8a80908c2700         | mov                 al, byte ptr [eax + 0x278c90]
            //   eb02                 | jmp                 4

        $sequence_8 = { 3c7a 770b 0fb6c0 8a80ad8c2700 }
            // n = 4, score = 200
            //   3c7a                 | cmp                 al, 0x7a
            //   770b                 | ja                  0xd
            //   0fb6c0               | movzx               eax, al
            //   8a80ad8c2700         | mov                 al, byte ptr [eax + 0x278cad]

        $sequence_9 = { e8???????? 8b4605 c68094a3270000 ff35???????? ff35???????? }
            // n = 5, score = 200
            //   e8????????           |                     
            //   8b4605               | mov                 eax, dword ptr [esi + 5]
            //   c68094a3270000       | mov                 byte ptr [eax + 0x27a394], 0
            //   ff35????????         |                     
            //   ff35????????         |                     

        $sequence_10 = { 7456 be01020000 56 ff15???????? 8bf8 897dd8 }
            // n = 6, score = 200
            //   7456                 | je                  0x58
            //   be01020000           | mov                 esi, 0x201
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax
            //   897dd8               | mov                 dword ptr [ebp - 0x28], edi

        $sequence_11 = { 8a80ad8c2700 eb02 32c0 84c0 }
            // n = 4, score = 200
            //   8a80ad8c2700         | mov                 al, byte ptr [eax + 0x278cad]
            //   eb02                 | jmp                 4
            //   32c0                 | xor                 al, al
            //   84c0                 | test                al, al

        $sequence_12 = { 8b35???????? 8d85ccfeffff 50 68???????? ffd6 85c0 }
            // n = 6, score = 200
            //   8b35????????         |                     
            //   8d85ccfeffff         | lea                 eax, [ebp - 0x134]
            //   50                   | push                eax
            //   68????????           |                     
            //   ffd6                 | call                esi
            //   85c0                 | test                eax, eax

        $sequence_13 = { 56 8d45c0 50 ff750c ff7508 e8???????? 83c414 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   8d45c0               | lea                 eax, [ebp - 0x40]
            //   50                   | push                eax
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14

        $sequence_14 = { e9???????? 8b7510 6a00 8d45fc 50 68ff270000 46 }
            // n = 7, score = 200
            //   e9????????           |                     
            //   8b7510               | mov                 esi, dword ptr [ebp + 0x10]
            //   6a00                 | push                0
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   68ff270000           | push                0x27ff
            //   46                   | inc                 esi

        $sequence_15 = { 3bc6 0f850a010000 8d45c8 50 8d45d4 50 56 }
            // n = 7, score = 200
            //   3bc6                 | cmp                 eax, esi
            //   0f850a010000         | jne                 0x110
            //   8d45c8               | lea                 eax, [ebp - 0x38]
            //   50                   | push                eax
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   50                   | push                eax
            //   56                   | push                esi

    condition:
        7 of them and filesize < 172032
}