rule win_zebrocy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.zebrocy."
        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.zebrocy"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 014158 11515c e8???????? dc6360 }
            // n = 4, score = 100
            //   014158               | add                 dword ptr [ecx + 0x58], eax
            //   11515c               | adc                 dword ptr [ecx + 0x5c], edx
            //   e8????????           |                     
            //   dc6360               | fsub                qword ptr [ebx + 0x60]

        $sequence_1 = { 837ddc00 0f8c9d000000 7f08 85f6 0f8493000000 }
            // n = 5, score = 100
            //   837ddc00             | cmp                 dword ptr [ebp - 0x24], 0
            //   0f8c9d000000         | jl                  0xa3
            //   7f08                 | jg                  0xa
            //   85f6                 | test                esi, esi
            //   0f8493000000         | je                  0x99

        $sequence_2 = { 0103 83c41c 5b 5e }
            // n = 4, score = 100
            //   0103                 | add                 dword ptr [ebx], eax
            //   83c41c               | add                 esp, 0x1c
            //   5b                   | pop                 ebx
            //   5e                   | pop                 esi

        $sequence_3 = { 0110 8b7dd4 ba???????? 89470c }
            // n = 4, score = 100
            //   0110                 | add                 dword ptr [eax], edx
            //   8b7dd4               | mov                 edi, dword ptr [ebp - 0x2c]
            //   ba????????           |                     
            //   89470c               | mov                 dword ptr [edi + 0xc], eax

        $sequence_4 = { 56 8b7508 57 8b3d???????? 68007f0000 33db }
            // n = 6, score = 100
            //   56                   | push                esi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   57                   | push                edi
            //   8b3d????????         |                     
            //   68007f0000           | push                0x7f00
            //   33db                 | xor                 ebx, ebx

        $sequence_5 = { e8???????? 8bc8 8bc6 c644246001 e8???????? be10000000 3974242c }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bc8                 | mov                 ecx, eax
            //   8bc6                 | mov                 eax, esi
            //   c644246001           | mov                 byte ptr [esp + 0x60], 1
            //   e8????????           |                     
            //   be10000000           | mov                 esi, 0x10
            //   3974242c             | cmp                 dword ptr [esp + 0x2c], esi

        $sequence_6 = { 0103 8b0e ba???????? e8???????? }
            // n = 4, score = 100
            //   0103                 | add                 dword ptr [ebx], eax
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   ba????????           |                     
            //   e8????????           |                     

        $sequence_7 = { 8b8c2480000000 6a00 56 6a00 6a00 6a00 6a00 }
            // n = 7, score = 100
            //   8b8c2480000000       | mov                 ecx, dword ptr [esp + 0x80]
            //   6a00                 | push                0
            //   56                   | push                esi
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_8 = { 0102 8b45d4 89500c 89c1 }
            // n = 4, score = 100
            //   0102                 | add                 dword ptr [edx], eax
            //   8b45d4               | mov                 eax, dword ptr [ebp - 0x2c]
            //   89500c               | mov                 dword ptr [eax + 0xc], edx
            //   89c1                 | mov                 ecx, eax

        $sequence_9 = { 014150 8b550c 115154 014158 }
            // n = 4, score = 100
            //   014150               | add                 dword ptr [ecx + 0x50], eax
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   115154               | adc                 dword ptr [ecx + 0x54], edx
            //   014158               | add                 dword ptr [ecx + 0x58], eax

        $sequence_10 = { 8d95b0f7ffff e8???????? c645fc0e 8b8dc4f6ffff 6aff 83c102 }
            // n = 6, score = 100
            //   8d95b0f7ffff         | lea                 edx, [ebp - 0x850]
            //   e8????????           |                     
            //   c645fc0e             | mov                 byte ptr [ebp - 4], 0xe
            //   8b8dc4f6ffff         | mov                 ecx, dword ptr [ebp - 0x93c]
            //   6aff                 | push                -1
            //   83c102               | add                 ecx, 2

        $sequence_11 = { 0103 31d2 85ff 8b03 }
            // n = 4, score = 100
            //   0103                 | add                 dword ptr [ebx], eax
            //   31d2                 | xor                 edx, edx
            //   85ff                 | test                edi, edi
            //   8b03                 | mov                 eax, dword ptr [ebx]

        $sequence_12 = { 68???????? e8???????? 85ff 0f84ee000000 8d1438 8955fc }
            // n = 6, score = 100
            //   68????????           |                     
            //   e8????????           |                     
            //   85ff                 | test                edi, edi
            //   0f84ee000000         | je                  0xf4
            //   8d1438               | lea                 edx, [eax + edi]
            //   8955fc               | mov                 dword ptr [ebp - 4], edx

        $sequence_13 = { b9???????? 8dbdb0f7ffff e8???????? 3ac3 7437 }
            // n = 5, score = 100
            //   b9????????           |                     
            //   8dbdb0f7ffff         | lea                 edi, [ebp - 0x850]
            //   e8????????           |                     
            //   3ac3                 | cmp                 al, bl
            //   7437                 | je                  0x39

        $sequence_14 = { 50 e9???????? 83f802 0f8525010000 83ec1c }
            // n = 5, score = 100
            //   50                   | push                eax
            //   e9????????           |                     
            //   83f802               | cmp                 eax, 2
            //   0f8525010000         | jne                 0x12b
            //   83ec1c               | sub                 esp, 0x1c

        $sequence_15 = { 0110 5e 5f 5d }
            // n = 4, score = 100
            //   0110                 | add                 dword ptr [eax], edx
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi
            //   5d                   | pop                 ebp

    condition:
        7 of them and filesize < 393216
}