rule win_snifula_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "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 = { 8933 c745fc01000000 5e 8b45fc c9 c20c00 55 }
            // n = 7, score = 200
            //   8933                 | mov                 dword ptr [ebx], esi
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1
            //   5e                   | pop                 esi
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   c9                   | leave               
            //   c20c00               | ret                 0xc
            //   55                   | push                ebp

        $sequence_1 = { e8???????? 8d83b80f0000 50 e8???????? 8b03 f70000000040 752b }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8d83b80f0000         | lea                 eax, [ebx + 0xfb8]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b03                 | mov                 eax, dword ptr [ebx]
            //   f70000000040         | test                dword ptr [eax], 0x40000000
            //   752b                 | jne                 0x2d

        $sequence_2 = { 0f8451ffffff 55 6a01 57 33f6 e8???????? 57 }
            // n = 7, score = 200
            //   0f8451ffffff         | je                  0xffffff57
            //   55                   | push                ebp
            //   6a01                 | push                1
            //   57                   | push                edi
            //   33f6                 | xor                 esi, esi
            //   e8????????           |                     
            //   57                   | push                edi

        $sequence_3 = { 830d????????ff 6a00 57 ffd6 a1???????? 69c0e8030000 50 }
            // n = 7, score = 200
            //   830d????????ff       |                     
            //   6a00                 | push                0
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   a1????????           |                     
            //   69c0e8030000         | imul                eax, eax, 0x3e8
            //   50                   | push                eax

        $sequence_4 = { 0f8439010000 6a04 33c0 55 896c2428 8d7c242c ab }
            // n = 7, score = 200
            //   0f8439010000         | je                  0x13f
            //   6a04                 | push                4
            //   33c0                 | xor                 eax, eax
            //   55                   | push                ebp
            //   896c2428             | mov                 dword ptr [esp + 0x28], ebp
            //   8d7c242c             | lea                 edi, [esp + 0x2c]
            //   ab                   | stosd               dword ptr es:[edi], eax

        $sequence_5 = { ba???????? 8bc6 e8???????? 85c0 7504 6a05 eb18 }
            // n = 7, score = 200
            //   ba????????           |                     
            //   8bc6                 | mov                 eax, esi
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7504                 | jne                 6
            //   6a05                 | push                5
            //   eb18                 | jmp                 0x1a

        $sequence_6 = { e8???????? 85c0 7420 ff7508 53 ff35???????? ff15???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7420                 | je                  0x22
            //   ff7508               | push                dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   ff35????????         |                     
            //   ff15????????         |                     

        $sequence_7 = { ff15???????? 3bc3 0f84ce010000 8d4dfc 51 6a30 8d4da8 }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   3bc3                 | cmp                 eax, ebx
            //   0f84ce010000         | je                  0x1d4
            //   8d4dfc               | lea                 ecx, [ebp - 4]
            //   51                   | push                ecx
            //   6a30                 | push                0x30
            //   8d4da8               | lea                 ecx, [ebp - 0x58]

        $sequence_8 = { a3???????? 83f805 7304 6a05 eb07 83f878 7608 }
            // n = 7, score = 200
            //   a3????????           |                     
            //   83f805               | cmp                 eax, 5
            //   7304                 | jae                 6
            //   6a05                 | push                5
            //   eb07                 | jmp                 9
            //   83f878               | cmp                 eax, 0x78
            //   7608                 | jbe                 0xa

        $sequence_9 = { 53 89460c a1???????? 56 894610 a1???????? 68???????? }
            // n = 7, score = 200
            //   53                   | push                ebx
            //   89460c               | mov                 dword ptr [esi + 0xc], eax
            //   a1????????           |                     
            //   56                   | push                esi
            //   894610               | mov                 dword ptr [esi + 0x10], eax
            //   a1????????           |                     
            //   68????????           |                     

    condition:
        7 of them and filesize < 188416
}