rule win_hackbrowserdata_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.hackbrowserdata."
        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.hackbrowserdata"
        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 = { eb14 4889de 0fb7bbc2000000 6689bbc0000000 4889f7 488b37 488b5e18 }
            // n = 7, score = 100
            //   eb14                 | mov                 dword ptr [eax], 0
            //   4889de               | dec                 eax
            //   0fb7bbc2000000       | lea                 eax, [0x5093a6]
            //   6689bbc0000000       | dec                 eax
            //   4889f7               | mov                 ecx, dword ptr [esp + 0x48]
            //   488b37               | dec                 eax
            //   488b5e18             | lea                 edx, [ecx + 8]

        $sequence_1 = { eb1f 488b15???????? 488b35???????? 31c9 eb16 b801000000 eb06 }
            // n = 7, score = 100
            //   eb1f                 | movups              xmmword ptr [esp + 0x210], xmm7
            //   488b15????????       |                     
            //   488b35????????       |                     
            //   31c9                 | dec                 eax
            //   eb16                 | mov                 dword ptr [esp + 0x210], eax
            //   b801000000           | dec                 eax
            //   eb06                 | mov                 dword ptr [esp + 0xb8], ebx

        $sequence_2 = { eb08 4989f9 bf00000000 0f1f4000 0f8507010000 48897c2460 90 }
            // n = 7, score = 100
            //   eb08                 | dec                 eax
            //   4989f9               | mov                 dword ptr [esp + 0x28], eax
            //   bf00000000           | dec                 eax
            //   0f1f4000             | mov                 dword ptr [eax], 0
            //   0f8507010000         | dec                 eax
            //   48897c2460           | mov                 dword ptr [esp + 0x18], eax
            //   90                   | mov                 byte ptr [eax], 0xc5

        $sequence_3 = { eb0d 31c0 4883c448 5d c3 ffc3 4c89c6 }
            // n = 7, score = 100
            //   eb0d                 | mov                 dword ptr [esp + 0x20], eax
            //   31c0                 | dec                 eax
            //   4883c448             | lea                 eax, [0x90964a]
            //   5d                   | dec                 eax
            //   c3                   | lea                 ecx, [0x19e]
            //   ffc3                 | dec                 eax
            //   4c89c6               | mov                 dword ptr [eax], ecx

        $sequence_4 = { eb7d 4889bc2490000000 4889f0 4c89e9 488bbc24c0000000 be03000000 41b801000000 }
            // n = 7, score = 100
            //   eb7d                 | dec                 eax
            //   4889bc2490000000     | mov                 ebx, dword ptr [esp + 0x48]
            //   4889f0               | nop                 dword ptr [eax + eax]
            //   4c89e9               | dec                 eax
            //   488bbc24c0000000     | mov                 ecx, eax
            //   be03000000           | dec                 eax
            //   41b801000000         | mov                 edi, ebx

        $sequence_5 = { f0440fc15a10 488b10 4c8b5828 4c8b6030 488b7838 488b7040 4c8b4020 }
            // n = 7, score = 100
            //   f0440fc15a10         | dec                 eax
            //   488b10               | mov                 ebx, eax
            //   4c8b5828             | dec                 eax
            //   4c8b6030             | lea                 eax, [0x7b1a47]
            //   488b7838             | nop                 
            //   488b7040             | dec                 eax
            //   4c8b4020             | mov                 ebx, eax

        $sequence_6 = { eb21 4889d3 0f1f440000 e8???????? 85c0 0f85e8000000 488b5c2448 }
            // n = 7, score = 100
            //   eb21                 | mov                 dword ptr [esp + 0x60], ebx
            //   4889d3               | dec                 eax
            //   0f1f440000           | mov                 dword ptr [esp + 0x6a8], edx
            //   e8????????           |                     
            //   85c0                 | dec                 eax
            //   0f85e8000000         | lea                 eax, [0x487a57]
            //   488b5c2448           | dec                 eax

        $sequence_7 = { 8b5204 0fbae218 6690 7337 488d5140 488b12 4889d1 }
            // n = 7, score = 100
            //   8b5204               | mov                 byte ptr [esp + 0x28], dl
            //   0fbae218             | inc                 esp
            //   6690                 | movzx               esp, byte ptr [esp + 0x66]
            //   7337                 | mov                 byte ptr [esp + 0x29], cl
            //   488d5140             | movzx               ebx, byte ptr [esp + 0x63]
            //   488b12               | movzx               edi, byte ptr [esp + 0x59]
            //   4889d1               | movzx               eax, byte ptr [esp + 0x6b]

        $sequence_8 = { ffd2 488d15b764b400 4839d0 756f 8403 440f117c2420 488b4b18 }
            // n = 7, score = 100
            //   ffd2                 | dec                 eax
            //   488d15b764b400       | mov                 ebp, dword ptr [ebp]
            //   4839d0               | inc                 esp
            //   756f                 | movups              xmmword ptr [esp + 0x5f], xmm7
            //   8403                 | inc                 esp
            //   440f117c2420         | movups              xmmword ptr [esp + 0x68], xmm7
            //   488b4b18             | inc                 esp

        $sequence_9 = { eb68 488b9424e8000000 488b1a 488b8424c0000000 b901000000 0f1f00 e8???????? }
            // n = 7, score = 100
            //   eb68                 | dec                 eax
            //   488b9424e8000000     | mov                 ecx, eax
            //   488b1a               | dec                 eax
            //   488b8424c0000000     | mov                 edi, ebx
            //   b901000000           | dec                 eax
            //   0f1f00               | lea                 eax, [0x8f2986]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 42451968
}