rule win_bee_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.bee."
        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.bee"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 8b4510 50 e8???????? 83c410 c68540ffffff00 }
            // n = 5, score = 100
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   c68540ffffff00       | mov                 byte ptr [ebp - 0xc0], 0

        $sequence_1 = { 85ed 0f8486010000 8b7b10 8bc8 2bcf 49 3bcd }
            // n = 7, score = 100
            //   85ed                 | test                ebp, ebp
            //   0f8486010000         | je                  0x18c
            //   8b7b10               | mov                 edi, dword ptr [ebx + 0x10]
            //   8bc8                 | mov                 ecx, eax
            //   2bcf                 | sub                 ecx, edi
            //   49                   | dec                 ecx
            //   3bcd                 | cmp                 ecx, ebp

        $sequence_2 = { c644241000 897c2414 3bd8 762b 3bcf 7605 }
            // n = 6, score = 100
            //   c644241000           | mov                 byte ptr [esp + 0x10], 0
            //   897c2414             | mov                 dword ptr [esp + 0x14], edi
            //   3bd8                 | cmp                 ebx, eax
            //   762b                 | jbe                 0x2d
            //   3bcf                 | cmp                 ecx, edi
            //   7605                 | jbe                 7

        $sequence_3 = { 8b5004 83c418 8bce ffd2 5e }
            // n = 5, score = 100
            //   8b5004               | mov                 edx, dword ptr [eax + 4]
            //   83c418               | add                 esp, 0x18
            //   8bce                 | mov                 ecx, esi
            //   ffd2                 | call                edx
            //   5e                   | pop                 esi

        $sequence_4 = { 8d5c2904 7505 e8???????? 8b430c 8b8ed0000000 2b8ecc000000 89442414 }
            // n = 7, score = 100
            //   8d5c2904             | lea                 ebx, [ecx + ebp + 4]
            //   7505                 | jne                 7
            //   e8????????           |                     
            //   8b430c               | mov                 eax, dword ptr [ebx + 0xc]
            //   8b8ed0000000         | mov                 ecx, dword ptr [esi + 0xd0]
            //   2b8ecc000000         | sub                 ecx, dword ptr [esi + 0xcc]
            //   89442414             | mov                 dword ptr [esp + 0x14], eax

        $sequence_5 = { 83c404 8bb42480000000 8b7c246c 8bcf 3bf5 7304 8d4c246c }
            // n = 7, score = 100
            //   83c404               | add                 esp, 4
            //   8bb42480000000       | mov                 esi, dword ptr [esp + 0x80]
            //   8b7c246c             | mov                 edi, dword ptr [esp + 0x6c]
            //   8bcf                 | mov                 ecx, edi
            //   3bf5                 | cmp                 esi, ebp
            //   7304                 | jae                 6
            //   8d4c246c             | lea                 ecx, [esp + 0x6c]

        $sequence_6 = { 52 8d4c241c 89442418 c744241c00000000 e8???????? 8b442418 50 }
            // n = 7, score = 100
            //   52                   | push                edx
            //   8d4c241c             | lea                 ecx, [esp + 0x1c]
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   c744241c00000000     | mov                 dword ptr [esp + 0x1c], 0
            //   e8????????           |                     
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   50                   | push                eax

        $sequence_7 = { c786ac00000018014200 889eb0000000 899eb4000000 889eb8000000 899ebc000000 899ec0000000 899ec4000000 }
            // n = 7, score = 100
            //   c786ac00000018014200     | mov    dword ptr [esi + 0xac], 0x420118
            //   889eb0000000         | mov                 byte ptr [esi + 0xb0], bl
            //   899eb4000000         | mov                 dword ptr [esi + 0xb4], ebx
            //   889eb8000000         | mov                 byte ptr [esi + 0xb8], bl
            //   899ebc000000         | mov                 dword ptr [esi + 0xbc], ebx
            //   899ec0000000         | mov                 dword ptr [esi + 0xc0], ebx
            //   899ec4000000         | mov                 dword ptr [esi + 0xc4], ebx

        $sequence_8 = { 741d 8bc7 c1f805 83e71f c1e706 8b048500534200 8d44380c }
            // n = 7, score = 100
            //   741d                 | je                  0x1f
            //   8bc7                 | mov                 eax, edi
            //   c1f805               | sar                 eax, 5
            //   83e71f               | and                 edi, 0x1f
            //   c1e706               | shl                 edi, 6
            //   8b048500534200       | mov                 eax, dword ptr [eax*4 + 0x425300]
            //   8d44380c             | lea                 eax, [eax + edi + 0xc]

        $sequence_9 = { 56 e8???????? 8bf0 8b442450 83c404 2b442448 89542420 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   8b442450             | mov                 eax, dword ptr [esp + 0x50]
            //   83c404               | add                 esp, 4
            //   2b442448             | sub                 eax, dword ptr [esp + 0x48]
            //   89542420             | mov                 dword ptr [esp + 0x20], edx

    condition:
        7 of them and filesize < 394240
}