rule win_zebrocy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { f644110140 7414 83f810 8bc3 }
            // n = 4, score = 100
            //   f644110140           | test                byte ptr [ecx + edx + 1], 0x40
            //   7414                 | je                  0x16
            //   83f810               | cmp                 eax, 0x10
            //   8bc3                 | mov                 eax, ebx

        $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 = { 8d45f4 64a300000000 33ff 8d45b8 897dfc 50 8d4ddc }
            // n = 7, score = 100
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   33ff                 | xor                 edi, edi
            //   8d45b8               | lea                 eax, [ebp - 0x48]
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   50                   | push                eax
            //   8d4ddc               | lea                 ecx, [ebp - 0x24]

        $sequence_5 = { 0110 5e 5f 5d }
            // n = 4, score = 100
            //   0110                 | add                 dword ptr [eax], edx
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi
            //   5d                   | pop                 ebp

        $sequence_6 = { 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_7 = { e8???????? 8bf8 8d7508 885dfc e8???????? be08000000 39b5e0fdffff }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   8d7508               | lea                 esi, [ebp + 8]
            //   885dfc               | mov                 byte ptr [ebp - 4], bl
            //   e8????????           |                     
            //   be08000000           | mov                 esi, 8
            //   39b5e0fdffff         | cmp                 dword ptr [ebp - 0x220], esi

        $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 = { 8bff 55 8bec 8b4508 56 8d34c5b0864200 }
            // n = 6, score = 100
            //   8bff                 | mov                 edi, edi
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   56                   | push                esi
            //   8d34c5b0864200       | lea                 esi, [eax*8 + 0x4286b0]

        $sequence_11 = { 8944243c ff15???????? 6685c0 0f84bf000000 8dbc2488000000 }
            // n = 5, score = 100
            //   8944243c             | mov                 dword ptr [esp + 0x3c], eax
            //   ff15????????         |                     
            //   6685c0               | test                ax, ax
            //   0f84bf000000         | je                  0xc5
            //   8dbc2488000000       | lea                 edi, [esp + 0x88]

        $sequence_12 = { 895c2438 c744243cd8954200 ffd7 8d4c240c 51 8944243c ff15???????? }
            // n = 7, score = 100
            //   895c2438             | mov                 dword ptr [esp + 0x38], ebx
            //   c744243cd8954200     | mov                 dword ptr [esp + 0x3c], 0x4295d8
            //   ffd7                 | call                edi
            //   8d4c240c             | lea                 ecx, [esp + 0xc]
            //   51                   | push                ecx
            //   8944243c             | mov                 dword ptr [esp + 0x3c], eax
            //   ff15????????         |                     

        $sequence_13 = { 51 e8???????? 83c40c 8bf8 c745fc01000000 3bf7 }
            // n = 6, score = 100
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8bf8                 | mov                 edi, eax
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1
            //   3bf7                 | cmp                 esi, edi

        $sequence_14 = { 0103 8b0e ba???????? e8???????? }
            // n = 4, score = 100
            //   0103                 | add                 dword ptr [ebx], eax
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   ba????????           |                     
            //   e8????????           |                     

        $sequence_15 = { 8d7150 8b4804 8975f0 c74431b0bc434200 8d4eb4 c745fc00000000 }
            // n = 6, score = 100
            //   8d7150               | lea                 esi, [ecx + 0x50]
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   8975f0               | mov                 dword ptr [ebp - 0x10], esi
            //   c74431b0bc434200     | mov                 dword ptr [ecx + esi - 0x50], 0x4243bc
            //   8d4eb4               | lea                 ecx, [esi - 0x4c]
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0

    condition:
        7 of them and filesize < 393216
}