rule win_rockloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.rockloader."
        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.rockloader"
        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 = { d9ee 53 56 dd55ec d9e8 }
            // n = 5, score = 300
            //   d9ee                 | fldz                
            //   53                   | push                ebx
            //   56                   | push                esi
            //   dd55ec               | fst                 qword ptr [ebp - 0x14]
            //   d9e8                 | fld1                

        $sequence_1 = { 7442 49 743a 49 49 7431 }
            // n = 6, score = 300
            //   7442                 | je                  0x44
            //   49                   | dec                 ecx
            //   743a                 | je                  0x3c
            //   49                   | dec                 ecx
            //   49                   | dec                 ecx
            //   7431                 | je                  0x33

        $sequence_2 = { eb07 50 ff15???????? 8bf0 85f6 7507 33c0 }
            // n = 7, score = 300
            //   eb07                 | jmp                 9
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   85f6                 | test                esi, esi
            //   7507                 | jne                 9
            //   33c0                 | xor                 eax, eax

        $sequence_3 = { 66c7005d00 8b36 0375fc e9???????? }
            // n = 4, score = 300
            //   66c7005d00           | mov                 word ptr [eax], 0x5d
            //   8b36                 | mov                 esi, dword ptr [esi]
            //   0375fc               | add                 esi, dword ptr [ebp - 4]
            //   e9????????           |                     

        $sequence_4 = { 47 8a07 3c22 0f85a9feffff 5b c60600 803f22 }
            // n = 7, score = 300
            //   47                   | inc                 edi
            //   8a07                 | mov                 al, byte ptr [edi]
            //   3c22                 | cmp                 al, 0x22
            //   0f85a9feffff         | jne                 0xfffffeaf
            //   5b                   | pop                 ebx
            //   c60600               | mov                 byte ptr [esi], 0
            //   803f22               | cmp                 byte ptr [edi], 0x22

        $sequence_5 = { 0f8eb0000000 8b5dfc 8b4508 2bc3 8945f4 837d1000 }
            // n = 6, score = 300
            //   0f8eb0000000         | jle                 0xb6
            //   8b5dfc               | mov                 ebx, dword ptr [ebp - 4]
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   2bc3                 | sub                 eax, ebx
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   837d1000             | cmp                 dword ptr [ebp + 0x10], 0

        $sequence_6 = { dc5df8 dfe0 f6c441 7a34 6a15 }
            // n = 5, score = 300
            //   dc5df8               | fcomp               qword ptr [ebp - 8]
            //   dfe0                 | fnstsw              ax
            //   f6c441               | test                ah, 0x41
            //   7a34                 | jp                  0x36
            //   6a15                 | push                0x15

        $sequence_7 = { 03c8 8d5c0b02 eb07 c745fc01000000 8b3f }
            // n = 5, score = 300
            //   03c8                 | add                 ecx, eax
            //   8d5c0b02             | lea                 ebx, [ebx + ecx + 2]
            //   eb07                 | jmp                 9
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1
            //   8b3f                 | mov                 edi, dword ptr [edi]

        $sequence_8 = { 8b5508 5f 5e 895114 c7410c03000000 5b }
            // n = 6, score = 300
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   895114               | mov                 dword ptr [ecx + 0x14], edx
            //   c7410c03000000       | mov                 dword ptr [ecx + 0xc], 3
            //   5b                   | pop                 ebx

        $sequence_9 = { e8???????? 8bd8 83c704 81fb00dc0000 720c 81fbffdf0000 0f86dc000000 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax
            //   83c704               | add                 edi, 4
            //   81fb00dc0000         | cmp                 ebx, 0xdc00
            //   720c                 | jb                  0xe
            //   81fbffdf0000         | cmp                 ebx, 0xdfff
            //   0f86dc000000         | jbe                 0xe2

    condition:
        7 of them and filesize < 98304
}