rule win_evilpony_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.evilpony."
        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.evilpony"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { c3 833eff 741a 57 ff7608 ff15???????? ff7604 }
            // n = 7, score = 200
            //   c3                   | ret                 
            //   833eff               | cmp                 dword ptr [esi], -1
            //   741a                 | je                  0x1c
            //   57                   | push                edi
            //   ff7608               | push                dword ptr [esi + 8]
            //   ff15????????         |                     
            //   ff7604               | push                dword ptr [esi + 4]

        $sequence_1 = { ff4dfc 680100efbe 8d4b01 eb20 3c02 7536 }
            // n = 6, score = 200
            //   ff4dfc               | dec                 dword ptr [ebp - 4]
            //   680100efbe           | push                0xbeef0001
            //   8d4b01               | lea                 ecx, [ebx + 1]
            //   eb20                 | jmp                 0x22
            //   3c02                 | cmp                 al, 2
            //   7536                 | jne                 0x38

        $sequence_2 = { 51 50 56 ff5214 33ff 56 }
            // n = 6, score = 200
            //   51                   | push                ecx
            //   50                   | push                eax
            //   56                   | push                esi
            //   ff5214               | call                dword ptr [edx + 0x14]
            //   33ff                 | xor                 edi, edi
            //   56                   | push                esi

        $sequence_3 = { 57 e8???????? 56 e8???????? 83c414 ff750c }
            // n = 6, score = 200
            //   57                   | push                edi
            //   e8????????           |                     
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_4 = { 50 e8???????? 83c40c eb08 8bc7 e8???????? }
            // n = 6, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   eb08                 | jmp                 0xa
            //   8bc7                 | mov                 eax, edi
            //   e8????????           |                     

        $sequence_5 = { 8b07 56 8d8dc0f7ffff 51 8d8decf7ffff 51 8d8de4f7ffff }
            // n = 7, score = 200
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   56                   | push                esi
            //   8d8dc0f7ffff         | lea                 ecx, [ebp - 0x840]
            //   51                   | push                ecx
            //   8d8decf7ffff         | lea                 ecx, [ebp - 0x814]
            //   51                   | push                ecx
            //   8d8de4f7ffff         | lea                 ecx, [ebp - 0x81c]

        $sequence_6 = { 47 6a00 ff750c 56 ff7508 ff15???????? }
            // n = 6, score = 200
            //   47                   | inc                 edi
            //   6a00                 | push                0
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   56                   | push                esi
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     

        $sequence_7 = { 40 75ef 56 ff7510 56 ff7508 }
            // n = 6, score = 200
            //   40                   | inc                 eax
            //   75ef                 | jne                 0xfffffff1
            //   56                   | push                esi
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   56                   | push                esi
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_8 = { c1ca08 23d1 c1c708 23f8 0bd7 8955d8 8b55b4 }
            // n = 7, score = 200
            //   c1ca08               | ror                 edx, 8
            //   23d1                 | and                 edx, ecx
            //   c1c708               | rol                 edi, 8
            //   23f8                 | and                 edi, eax
            //   0bd7                 | or                  edx, edi
            //   8955d8               | mov                 dword ptr [ebp - 0x28], edx
            //   8b55b4               | mov                 edx, dword ptr [ebp - 0x4c]

        $sequence_9 = { c14dac02 8d8c08dcbc1b8f 8b45f0 3345e8 894db4 3345dc 3345c8 }
            // n = 7, score = 200
            //   c14dac02             | ror                 dword ptr [ebp - 0x54], 2
            //   8d8c08dcbc1b8f       | lea                 ecx, [eax + ecx - 0x70e44324]
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]
            //   3345e8               | xor                 eax, dword ptr [ebp - 0x18]
            //   894db4               | mov                 dword ptr [ebp - 0x4c], ecx
            //   3345dc               | xor                 eax, dword ptr [ebp - 0x24]
            //   3345c8               | xor                 eax, dword ptr [ebp - 0x38]

    condition:
        7 of them and filesize < 147456
}