rule win_heriplor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.heriplor."
        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.heriplor"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 89d1 ebe8 8b7918 8b5f3c }
            // n = 4, score = 300
            //   89d1                 | mov                 ecx, edx
            //   ebe8                 | jmp                 0xffffffea
            //   8b7918               | mov                 edi, dword ptr [ecx + 0x18]
            //   8b5f3c               | mov                 ebx, dword ptr [edi + 0x3c]

        $sequence_1 = { 01fb 8b32 01fe 6a01 ff750c 56 e8???????? }
            // n = 7, score = 300
            //   01fb                 | add                 ebx, edi
            //   8b32                 | mov                 esi, dword ptr [edx]
            //   01fe                 | add                 esi, edi
            //   6a01                 | push                1
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   56                   | push                esi
            //   e8????????           |                     

        $sequence_2 = { 8b480c 8b11 8b4130 6a02 ff7508 }
            // n = 5, score = 300
            //   8b480c               | mov                 ecx, dword ptr [eax + 0xc]
            //   8b11                 | mov                 edx, dword ptr [ecx]
            //   8b4130               | mov                 eax, dword ptr [ecx + 0x30]
            //   6a02                 | push                2
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_3 = { 89ec 5d c20c00 55 89e5 56 }
            // n = 6, score = 300
            //   89ec                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20c00               | ret                 0xc
            //   55                   | push                ebp
            //   89e5                 | mov                 ebp, esp
            //   56                   | push                esi

        $sequence_4 = { 89e5 51 53 33db 33c9 }
            // n = 5, score = 300
            //   89e5                 | mov                 ebp, esp
            //   51                   | push                ecx
            //   53                   | push                ebx
            //   33db                 | xor                 ebx, ebx
            //   33c9                 | xor                 ecx, ecx

        $sequence_5 = { 01f8 5f 5e 89ec 5d }
            // n = 5, score = 300
            //   01f8                 | add                 eax, edi
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   89ec                 | mov                 esp, ebp
            //   5d                   | pop                 ebp

        $sequence_6 = { 33d2 668b13 8b0491 01f8 5f 5e 89ec }
            // n = 7, score = 300
            //   33d2                 | xor                 edx, edx
            //   668b13               | mov                 dx, word ptr [ebx]
            //   8b0491               | mov                 eax, dword ptr [ecx + edx*4]
            //   01f8                 | add                 eax, edi
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   89ec                 | mov                 esp, ebp

        $sequence_7 = { 5b 59 89ec 5d c20c00 55 89e5 }
            // n = 7, score = 300
            //   5b                   | pop                 ebx
            //   59                   | pop                 ecx
            //   89ec                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20c00               | ret                 0xc
            //   55                   | push                ebp
            //   89e5                 | mov                 ebp, esp

        $sequence_8 = { 46 8b06 50 46 }
            // n = 4, score = 300
            //   46                   | inc                 esi
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   50                   | push                eax
            //   46                   | inc                 esi

        $sequence_9 = { 33db 33c9 8b4508 8a08 }
            // n = 4, score = 300
            //   33db                 | xor                 ebx, ebx
            //   33c9                 | xor                 ecx, ecx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8a08                 | mov                 cl, byte ptr [eax]

    condition:
        7 of them and filesize < 49152
}