rule win_flowershop_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.flowershop."
        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.flowershop"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 8b542408 56 57 8d7804 3939 8b7204 7305 }
            // n = 7, score = 500
            //   8b542408             | mov                 edx, dword ptr [esp + 8]
            //   56                   | push                esi
            //   57                   | push                edi
            //   8d7804               | lea                 edi, [eax + 4]
            //   3939                 | cmp                 dword ptr [ecx], edi
            //   8b7204               | mov                 esi, dword ptr [edx + 4]
            //   7305                 | jae                 7

        $sequence_1 = { b9???????? 8a11 3a15???????? 740e 83c11c 40 81f9???????? }
            // n = 7, score = 500
            //   b9????????           |                     
            //   8a11                 | mov                 dl, byte ptr [ecx]
            //   3a15????????         |                     
            //   740e                 | je                  0x10
            //   83c11c               | add                 ecx, 0x1c
            //   40                   | inc                 eax
            //   81f9????????         |                     

        $sequence_2 = { 56 e8???????? 6a20 8d45fc 57 50 6a64 }
            // n = 7, score = 500
            //   56                   | push                esi
            //   e8????????           |                     
            //   6a20                 | push                0x20
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   57                   | push                edi
            //   50                   | push                eax
            //   6a64                 | push                0x64

        $sequence_3 = { 68???????? 8935???????? 8935???????? e8???????? 83c40c 893d???????? 8bc7 }
            // n = 7, score = 500
            //   68????????           |                     
            //   8935????????         |                     
            //   8935????????         |                     
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   893d????????         |                     
            //   8bc7                 | mov                 eax, edi

        $sequence_4 = { 33f6 3b75ec 8975fc 7361 8d45f8 50 56 }
            // n = 7, score = 500
            //   33f6                 | xor                 esi, esi
            //   3b75ec               | cmp                 esi, dword ptr [ebp - 0x14]
            //   8975fc               | mov                 dword ptr [ebp - 4], esi
            //   7361                 | jae                 0x63
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax
            //   56                   | push                esi

        $sequence_5 = { 0fb638 69d283000000 03d7 40 ff4d10 89550c 75c5 }
            // n = 7, score = 500
            //   0fb638               | movzx               edi, byte ptr [eax]
            //   69d283000000         | imul                edx, edx, 0x83
            //   03d7                 | add                 edx, edi
            //   40                   | inc                 eax
            //   ff4d10               | dec                 dword ptr [ebp + 0x10]
            //   89550c               | mov                 dword ptr [ebp + 0xc], edx
            //   75c5                 | jne                 0xffffffc7

        $sequence_6 = { 6a01 8d041e 52 50 ff37 e8???????? }
            // n = 6, score = 500
            //   6a01                 | push                1
            //   8d041e               | lea                 eax, [esi + ebx]
            //   52                   | push                edx
            //   50                   | push                eax
            //   ff37                 | push                dword ptr [edi]
            //   e8????????           |                     

        $sequence_7 = { 83c709 6875d5cdfb 8d4606 57 50 e8???????? }
            // n = 6, score = 500
            //   83c709               | add                 edi, 9
            //   6875d5cdfb           | push                0xfbcdd575
            //   8d4606               | lea                 eax, [esi + 6]
            //   57                   | push                edi
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_8 = { a3???????? 7504 33c0 5e c3 8b44240c 8b0d???????? }
            // n = 7, score = 500
            //   a3????????           |                     
            //   7504                 | jne                 6
            //   33c0                 | xor                 eax, eax
            //   5e                   | pop                 esi
            //   c3                   | ret                 
            //   8b44240c             | mov                 eax, dword ptr [esp + 0xc]
            //   8b0d????????         |                     

        $sequence_9 = { 8b7d08 57 ff15???????? 40 40 83f832 7f6d }
            // n = 7, score = 500
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   57                   | push                edi
            //   ff15????????         |                     
            //   40                   | inc                 eax
            //   40                   | inc                 eax
            //   83f832               | cmp                 eax, 0x32
            //   7f6d                 | jg                  0x6f

    condition:
        7 of them and filesize < 829440
}