rule win_rhino_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.rhino."
        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.rhino"
        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 = { ff10 8d4dd8 e8???????? 8b07 8bcf 6a01 ff10 }
            // n = 7, score = 400
            //   ff10                 | call                dword ptr [eax]
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]
            //   e8????????           |                     
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   8bcf                 | mov                 ecx, edi
            //   6a01                 | push                1
            //   ff10                 | call                dword ptr [eax]

        $sequence_1 = { 8bf8 c1e91f 03f9 8bda 8b4c2424 83d300 6a00 }
            // n = 7, score = 400
            //   8bf8                 | mov                 edi, eax
            //   c1e91f               | shr                 ecx, 0x1f
            //   03f9                 | add                 edi, ecx
            //   8bda                 | mov                 ebx, edx
            //   8b4c2424             | mov                 ecx, dword ptr [esp + 0x24]
            //   83d300               | adc                 ebx, 0
            //   6a00                 | push                0

        $sequence_2 = { 8b742428 8bda d1eb 57 53 895c2414 8d2c9e }
            // n = 7, score = 400
            //   8b742428             | mov                 esi, dword ptr [esp + 0x28]
            //   8bda                 | mov                 ebx, edx
            //   d1eb                 | shr                 ebx, 1
            //   57                   | push                edi
            //   53                   | push                ebx
            //   895c2414             | mov                 dword ptr [esp + 0x14], ebx
            //   8d2c9e               | lea                 ebp, [esi + ebx*4]

        $sequence_3 = { 8b4d08 668911 eb11 0fb645fc 66c1e108 660bc8 8b4508 }
            // n = 7, score = 400
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   668911               | mov                 word ptr [ecx], dx
            //   eb11                 | jmp                 0x13
            //   0fb645fc             | movzx               eax, byte ptr [ebp - 4]
            //   66c1e108             | shl                 cx, 8
            //   660bc8               | or                  cx, ax
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_4 = { 8b74243c 8bd9 895c2408 85f6 0f8499000000 8d4eff 55 }
            // n = 7, score = 400
            //   8b74243c             | mov                 esi, dword ptr [esp + 0x3c]
            //   8bd9                 | mov                 ebx, ecx
            //   895c2408             | mov                 dword ptr [esp + 8], ebx
            //   85f6                 | test                esi, esi
            //   0f8499000000         | je                  0x9f
            //   8d4eff               | lea                 ecx, [esi - 1]
            //   55                   | push                ebp

        $sequence_5 = { 5e 5d 5b 33cc e8???????? 83c44c c21000 }
            // n = 7, score = 400
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   5b                   | pop                 ebx
            //   33cc                 | xor                 ecx, esp
            //   e8????????           |                     
            //   83c44c               | add                 esp, 0x4c
            //   c21000               | ret                 0x10

        $sequence_6 = { 8d4c2438 e8???????? ff7304 8b17 8bcf ff33 }
            // n = 6, score = 400
            //   8d4c2438             | lea                 ecx, [esp + 0x38]
            //   e8????????           |                     
            //   ff7304               | push                dword ptr [ebx + 4]
            //   8b17                 | mov                 edx, dword ptr [edi]
            //   8bcf                 | mov                 ecx, edi
            //   ff33                 | push                dword ptr [ebx]

        $sequence_7 = { b99a050000 3bc8 6a05 1bd2 f7da 83c206 3d1b020000 }
            // n = 7, score = 400
            //   b99a050000           | mov                 ecx, 0x59a
            //   3bc8                 | cmp                 ecx, eax
            //   6a05                 | push                5
            //   1bd2                 | sbb                 edx, edx
            //   f7da                 | neg                 edx
            //   83c206               | add                 edx, 6
            //   3d1b020000           | cmp                 eax, 0x21b

        $sequence_8 = { e8???????? 8b4d0c 8d45dc 8365fc00 50 e8???????? 8d4de0 }
            // n = 7, score = 400
            //   e8????????           |                     
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   50                   | push                eax
            //   e8????????           |                     
            //   8d4de0               | lea                 ecx, [ebp - 0x20]

        $sequence_9 = { 8a463f 88473f 8bc7 e8???????? c20400 6a04 b8???????? }
            // n = 7, score = 400
            //   8a463f               | mov                 al, byte ptr [esi + 0x3f]
            //   88473f               | mov                 byte ptr [edi + 0x3f], al
            //   8bc7                 | mov                 eax, edi
            //   e8????????           |                     
            //   c20400               | ret                 4
            //   6a04                 | push                4
            //   b8????????           |                     

    condition:
        7 of them and filesize < 1288192
}