rule win_snifula_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 68???????? eb05 68???????? 57 ffd6 8bc7 5f }
            // n = 7, score = 200
            //   68????????           |                     
            //   eb05                 | jmp                 7
            //   68????????           |                     
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi

        $sequence_1 = { 53 6a00 ff35???????? ff15???????? b8???????? 83c9ff }
            // n = 6, score = 200
            //   53                   | push                ebx
            //   6a00                 | push                0
            //   ff35????????         |                     
            //   ff15????????         |                     
            //   b8????????           |                     
            //   83c9ff               | or                  ecx, 0xffffffff

        $sequence_2 = { 85c0 742f 46 3b750c 7cd5 4f 57 }
            // n = 7, score = 200
            //   85c0                 | test                eax, eax
            //   742f                 | je                  0x31
            //   46                   | inc                 esi
            //   3b750c               | cmp                 esi, dword ptr [ebp + 0xc]
            //   7cd5                 | jl                  0xffffffd7
            //   4f                   | dec                 edi
            //   57                   | push                edi

        $sequence_3 = { 7749 8b8e6caf0600 8d867caf0600 3908 7602 8908 ff75f4 }
            // n = 7, score = 200
            //   7749                 | ja                  0x4b
            //   8b8e6caf0600         | mov                 ecx, dword ptr [esi + 0x6af6c]
            //   8d867caf0600         | lea                 eax, dword ptr [esi + 0x6af7c]
            //   3908                 | cmp                 dword ptr [eax], ecx
            //   7602                 | jbe                 4
            //   8908                 | mov                 dword ptr [eax], ecx
            //   ff75f4               | push                dword ptr [ebp - 0xc]

        $sequence_4 = { 5f 8d442414 50 53 56 68???????? 53 }
            // n = 7, score = 200
            //   5f                   | pop                 edi
            //   8d442414             | lea                 eax, dword ptr [esp + 0x14]
            //   50                   | push                eax
            //   53                   | push                ebx
            //   56                   | push                esi
            //   68????????           |                     
            //   53                   | push                ebx

        $sequence_5 = { 8b8660af0600 83f803 0f82f9000000 3945f8 0f87f0000000 8b9664af0600 }
            // n = 6, score = 200
            //   8b8660af0600         | mov                 eax, dword ptr [esi + 0x6af60]
            //   83f803               | cmp                 eax, 3
            //   0f82f9000000         | jb                  0xff
            //   3945f8               | cmp                 dword ptr [ebp - 8], eax
            //   0f87f0000000         | ja                  0xf6
            //   8b9664af0600         | mov                 edx, dword ptr [esi + 0x6af64]

        $sequence_6 = { ff15???????? 89442434 3bc5 0f8440010000 55 50 896c2438 }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   89442434             | mov                 dword ptr [esp + 0x34], eax
            //   3bc5                 | cmp                 eax, ebp
            //   0f8440010000         | je                  0x146
            //   55                   | push                ebp
            //   50                   | push                eax
            //   896c2438             | mov                 dword ptr [esp + 0x38], ebp

        $sequence_7 = { ff742410 ff15???????? ff74240c ff15???????? a1???????? 83c9ff f00fc108 }
            // n = 7, score = 200
            //   ff742410             | push                dword ptr [esp + 0x10]
            //   ff15????????         |                     
            //   ff74240c             | push                dword ptr [esp + 0xc]
            //   ff15????????         |                     
            //   a1????????           |                     
            //   83c9ff               | or                  ecx, 0xffffffff
            //   f00fc108             | lock xadd           dword ptr [eax], ecx

        $sequence_8 = { 83601c00 56 8d7104 3bf2 7604 33c0 eb7d }
            // n = 7, score = 200
            //   83601c00             | and                 dword ptr [eax + 0x1c], 0
            //   56                   | push                esi
            //   8d7104               | lea                 esi, dword ptr [ecx + 4]
            //   3bf2                 | cmp                 esi, edx
            //   7604                 | jbe                 6
            //   33c0                 | xor                 eax, eax
            //   eb7d                 | jmp                 0x7f

        $sequence_9 = { 68???????? 57 ffd6 33db 807db800 }
            // n = 5, score = 200
            //   68????????           |                     
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   33db                 | xor                 ebx, ebx
            //   807db800             | cmp                 byte ptr [ebp - 0x48], 0

    condition:
        7 of them and filesize < 188416
}