rule win_rockloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "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 = { 8945f8 eb07 c745ec01000000 8b36 85f6 }
            // n = 5, score = 300
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   eb07                 | jmp                 9
            //   c745ec01000000       | mov                 dword ptr [ebp - 0x14], 1
            //   8b36                 | mov                 esi, dword ptr [esi]
            //   85f6                 | test                esi, esi

        $sequence_1 = { 8d44c1a9 c3 33c0 c3 }
            // n = 4, score = 300
            //   8d44c1a9             | lea                 eax, [ecx + eax*8 - 0x57]
            //   c3                   | ret                 
            //   33c0                 | xor                 eax, eax
            //   c3                   | ret                 

        $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 = { 8d45ec 50 8d85a0f7ffff 50 }
            // n = 4, score = 300
            //   8d45ec               | lea                 eax, [ebp - 0x14]
            //   50                   | push                eax
            //   8d85a0f7ffff         | lea                 eax, [ebp - 0x860]
            //   50                   | push                eax

        $sequence_4 = { ff7508 8bc6 e8???????? eb40 }
            // n = 4, score = 300
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8bc6                 | mov                 eax, esi
            //   e8????????           |                     
            //   eb40                 | jmp                 0x42

        $sequence_5 = { 46 80382d 750a dd05???????? 40 dd5de4 }
            // n = 6, score = 300
            //   46                   | inc                 esi
            //   80382d               | cmp                 byte ptr [eax], 0x2d
            //   750a                 | jne                 0xc
            //   dd05????????         |                     
            //   40                   | inc                 eax
            //   dd5de4               | fstp                qword ptr [ebp - 0x1c]

        $sequence_6 = { 7f09 0fbec9 8d44c1d0 eb24 80f941 7c0e 80f946 }
            // n = 7, score = 300
            //   7f09                 | jg                  0xb
            //   0fbec9               | movsx               ecx, cl
            //   8d44c1d0             | lea                 eax, [ecx + eax*8 - 0x30]
            //   eb24                 | jmp                 0x26
            //   80f941               | cmp                 cl, 0x41
            //   7c0e                 | jl                  0x10
            //   80f946               | cmp                 cl, 0x46

        $sequence_7 = { 66c7075d00 8bc6 5f 5e 5b }
            // n = 5, score = 300
            //   66c7075d00           | mov                 word ptr [edi], 0x5d
            //   8bc6                 | mov                 eax, esi
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

        $sequence_8 = { 3b75f4 7ce9 ff75f8 ff15???????? }
            // n = 4, score = 300
            //   3b75f4               | cmp                 esi, dword ptr [ebp - 0xc]
            //   7ce9                 | jl                  0xffffffeb
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     

        $sequence_9 = { 3c30 7c04 3c39 7e2a 3c5b 750c 8b4d08 }
            // n = 7, score = 300
            //   3c30                 | cmp                 al, 0x30
            //   7c04                 | jl                  6
            //   3c39                 | cmp                 al, 0x39
            //   7e2a                 | jle                 0x2c
            //   3c5b                 | cmp                 al, 0x5b
            //   750c                 | jne                 0xe
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]

    condition:
        7 of them and filesize < 98304
}