rule win_snifula_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.snifula."
        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.snifula"
        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 = { 0fb74da2 03c1 3945f8 7512 8b5d08 8d45e0 50 }
            // n = 7, score = 200
            //   0fb74da2             | movzx               ecx, word ptr [ebp - 0x5e]
            //   03c1                 | add                 eax, ecx
            //   3945f8               | cmp                 dword ptr [ebp - 8], eax
            //   7512                 | jne                 0x14
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   50                   | push                eax

        $sequence_1 = { 8d45e8 50 e8???????? 85c0 74d3 ff75e8 ff7508 }
            // n = 7, score = 200
            //   8d45e8               | lea                 eax, [ebp - 0x18]
            //   50                   | push                eax
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   74d3                 | je                  0xffffffd5
            //   ff75e8               | push                dword ptr [ebp - 0x18]
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_2 = { eb0b 8b0e 57 ff7508 e8???????? 85c0 7503 }
            // n = 7, score = 200
            //   eb0b                 | jmp                 0xd
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   57                   | push                edi
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7503                 | jne                 5

        $sequence_3 = { 68???????? ff742424 ff15???????? ff742420 89442414 ffd6 50 }
            // n = 7, score = 200
            //   68????????           |                     
            //   ff742424             | push                dword ptr [esp + 0x24]
            //   ff15????????         |                     
            //   ff742420             | push                dword ptr [esp + 0x20]
            //   89442414             | mov                 dword ptr [esp + 0x14], eax
            //   ffd6                 | call                esi
            //   50                   | push                eax

        $sequence_4 = { eb05 68???????? ff75fc ff75f8 e8???????? 8d45f4 }
            // n = 6, score = 200
            //   eb05                 | jmp                 7
            //   68????????           |                     
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   e8????????           |                     
            //   8d45f4               | lea                 eax, [ebp - 0xc]

        $sequence_5 = { ff15???????? 83fbff 7508 ff15???????? 8bd8 a1???????? 3bc5 }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   83fbff               | cmp                 ebx, -1
            //   7508                 | jne                 0xa
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax
            //   a1????????           |                     
            //   3bc5                 | cmp                 eax, ebp

        $sequence_6 = { 8bf0 3bf7 7505 6a02 5b eb40 6a5c }
            // n = 7, score = 200
            //   8bf0                 | mov                 esi, eax
            //   3bf7                 | cmp                 esi, edi
            //   7505                 | jne                 7
            //   6a02                 | push                2
            //   5b                   | pop                 ebx
            //   eb40                 | jmp                 0x42
            //   6a5c                 | push                0x5c

        $sequence_7 = { ff7510 ff750c 56 e8???????? 8bd8 56 ff15???????? }
            // n = 7, score = 200
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   56                   | push                esi
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_8 = { 6a40 ffd7 8bd8 85db 75cc 85db 7445 }
            // n = 7, score = 200
            //   6a40                 | push                0x40
            //   ffd7                 | call                edi
            //   8bd8                 | mov                 ebx, eax
            //   85db                 | test                ebx, ebx
            //   75cc                 | jne                 0xffffffce
            //   85db                 | test                ebx, ebx
            //   7445                 | je                  0x47

        $sequence_9 = { ff5010 897320 eb06 8b7c2410 33f6 8b17 56 }
            // n = 7, score = 200
            //   ff5010               | call                dword ptr [eax + 0x10]
            //   897320               | mov                 dword ptr [ebx + 0x20], esi
            //   eb06                 | jmp                 8
            //   8b7c2410             | mov                 edi, dword ptr [esp + 0x10]
            //   33f6                 | xor                 esi, esi
            //   8b17                 | mov                 edx, dword ptr [edi]
            //   56                   | push                esi

    condition:
        7 of them and filesize < 188416
}