rule win_snifula_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 05ff0f0000 2500f0ffff 3bc3 7702 8bc3 f7c100000002 7402 }
            // n = 7, score = 200
            //   05ff0f0000           | add                 eax, 0xfff
            //   2500f0ffff           | and                 eax, 0xfffff000
            //   3bc3                 | cmp                 eax, ebx
            //   7702                 | ja                  4
            //   8bc3                 | mov                 eax, ebx
            //   f7c100000002         | test                ecx, 0x2000000
            //   7402                 | je                  4

        $sequence_1 = { 85c0 0f84a2000000 57 50 ff7508 e8???????? 8b7d0c }
            // n = 7, score = 200
            //   85c0                 | test                eax, eax
            //   0f84a2000000         | je                  0xa8
            //   57                   | push                edi
            //   50                   | push                eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   8b7d0c               | mov                 edi, dword ptr [ebp + 0xc]

        $sequence_2 = { ff35???????? ffd7 ff742420 8944242c }
            // n = 4, score = 200
            //   ff35????????         |                     
            //   ffd7                 | call                edi
            //   ff742420             | push                dword ptr [esp + 0x20]
            //   8944242c             | mov                 dword ptr [esp + 0x2c], eax

        $sequence_3 = { 8b83e8180000 99 2bc2 8bf0 d1fe eb09 }
            // n = 6, score = 200
            //   8b83e8180000         | mov                 eax, dword ptr [ebx + 0x18e8]
            //   99                   | cdq                 
            //   2bc2                 | sub                 eax, edx
            //   8bf0                 | mov                 esi, eax
            //   d1fe                 | sar                 esi, 1
            //   eb09                 | jmp                 0xb

        $sequence_4 = { 8d45f8 50 c745f498000000 e8???????? 85c0 7569 57 }
            // n = 7, score = 200
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax
            //   c745f498000000       | mov                 dword ptr [ebp - 0xc], 0x98
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7569                 | jne                 0x6b
            //   57                   | push                edi

        $sequence_5 = { ffd3 56 ffd7 5f 5b c3 }
            // n = 6, score = 200
            //   ffd3                 | call                ebx
            //   56                   | push                esi
            //   ffd7                 | call                edi
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx
            //   c3                   | ret                 

        $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 = { 8d4608 50 6a01 6a00 ffd7 85c0 7519 }
            // n = 7, score = 200
            //   8d4608               | lea                 eax, [esi + 8]
            //   50                   | push                eax
            //   6a01                 | push                1
            //   6a00                 | push                0
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   7519                 | jne                 0x1b

        $sequence_8 = { 8b03 e8???????? 8945fc 85c0 750f 394508 750a }
            // n = 7, score = 200
            //   8b03                 | mov                 eax, dword ptr [ebx]
            //   e8????????           |                     
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   85c0                 | test                eax, eax
            //   750f                 | jne                 0x11
            //   394508               | cmp                 dword ptr [ebp + 8], eax
            //   750a                 | jne                 0xc

        $sequence_9 = { 33c9 6a00 2bf8 51 8bc6 e8???????? 8b06 }
            // n = 7, score = 200
            //   33c9                 | xor                 ecx, ecx
            //   6a00                 | push                0
            //   2bf8                 | sub                 edi, eax
            //   51                   | push                ecx
            //   8bc6                 | mov                 eax, esi
            //   e8????????           |                     
            //   8b06                 | mov                 eax, dword ptr [esi]

    condition:
        7 of them and filesize < 188416
}