rule win_flowershop_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        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 = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { d2e2 8b4d10 0ac2 8a140e 8b4d14 225508 8ad8 }
            // n = 7, score = 500
            //   d2e2                 | shl                 dl, cl
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   0ac2                 | or                  al, dl
            //   8a140e               | mov                 dl, byte ptr [esi + ecx]
            //   8b4d14               | mov                 ecx, dword ptr [ebp + 0x14]
            //   225508               | and                 dl, byte ptr [ebp + 8]
            //   8ad8                 | mov                 bl, al

        $sequence_1 = { 8d4804 3bf1 7cd1 8d0c18 81f9d0070000 7fc6 50 }
            // n = 7, score = 500
            //   8d4804               | lea                 ecx, [eax + 4]
            //   3bf1                 | cmp                 esi, ecx
            //   7cd1                 | jl                  0xffffffd3
            //   8d0c18               | lea                 ecx, [eax + ebx]
            //   81f9d0070000         | cmp                 ecx, 0x7d0
            //   7fc6                 | jg                  0xffffffc8
            //   50                   | push                eax

        $sequence_2 = { 833d????????04 7534 a1???????? 3bc3 742b 8d4d0c }
            // n = 6, score = 500
            //   833d????????04       |                     
            //   7534                 | jne                 0x36
            //   a1????????           |                     
            //   3bc3                 | cmp                 eax, ebx
            //   742b                 | je                  0x2d
            //   8d4d0c               | lea                 ecx, [ebp + 0xc]

        $sequence_3 = { 6875d5cdfb 6a04 56 e8???????? 83c448 8945fc 8d45fc }
            // n = 7, score = 500
            //   6875d5cdfb           | push                0xfbcdd575
            //   6a04                 | push                4
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c448               | add                 esp, 0x48
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8d45fc               | lea                 eax, [ebp - 4]

        $sequence_4 = { e8???????? 83c424 85c0 7414 8bce 2bc8 2bc6 }
            // n = 7, score = 500
            //   e8????????           |                     
            //   83c424               | add                 esp, 0x24
            //   85c0                 | test                eax, eax
            //   7414                 | je                  0x16
            //   8bce                 | mov                 ecx, esi
            //   2bc8                 | sub                 ecx, eax
            //   2bc6                 | sub                 eax, esi

        $sequence_5 = { 6a04 ff7510 2ad8 80eb05 660fb6cb 6689883c020000 }
            // n = 6, score = 500
            //   6a04                 | push                4
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   2ad8                 | sub                 bl, al
            //   80eb05               | sub                 bl, 5
            //   660fb6cb             | movzx               cx, bl
            //   6689883c020000       | mov                 word ptr [eax + 0x23c], cx

        $sequence_6 = { 53 57 e8???????? 0135???????? 83c418 33c0 }
            // n = 6, score = 500
            //   53                   | push                ebx
            //   57                   | push                edi
            //   e8????????           |                     
            //   0135????????         |                     
            //   83c418               | add                 esp, 0x18
            //   33c0                 | xor                 eax, eax

        $sequence_7 = { 1bc0 59 f7d8 59 8906 33c0 5e }
            // n = 7, score = 500
            //   1bc0                 | sbb                 eax, eax
            //   59                   | pop                 ecx
            //   f7d8                 | neg                 eax
            //   59                   | pop                 ecx
            //   8906                 | mov                 dword ptr [esi], eax
            //   33c0                 | xor                 eax, eax
            //   5e                   | pop                 esi

        $sequence_8 = { 50 ff15???????? 8325????????00 e9???????? c3 33c0 }
            // n = 6, score = 500
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8325????????00       |                     
            //   e9????????           |                     
            //   c3                   | ret                 
            //   33c0                 | xor                 eax, eax

        $sequence_9 = { 85c0 7530 837df803 752a 03750c fe45fe 85c0 }
            // n = 7, score = 500
            //   85c0                 | test                eax, eax
            //   7530                 | jne                 0x32
            //   837df803             | cmp                 dword ptr [ebp - 8], 3
            //   752a                 | jne                 0x2c
            //   03750c               | add                 esi, dword ptr [ebp + 0xc]
            //   fe45fe               | inc                 byte ptr [ebp - 2]
            //   85c0                 | test                eax, eax

    condition:
        7 of them and filesize < 829440
}