rule win_wininetloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.wininetloader."
        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.wininetloader"
        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 = { 4c8970c8 4c8b31 450fb626 741c 488b81d0000000 410fb6d4 488b4808 }
            // n = 7, score = 100
            //   4c8970c8             | lea                 ecx, [ebp + 0x38]
            //   4c8b31               | mov                 ecx, 0x10
            //   450fb626             | dec                 eax
            //   741c                 | mov                 dword ptr [ebp - 0x58], eax
            //   488b81d0000000       | dec                 eax
            //   410fb6d4             | lea                 ecx, [ebp + 0x38]
            //   488b4808             | mov                 ecx, 0x18

        $sequence_1 = { cc 488d4c2438 e8???????? 488d150f430700 488d4c2438 e8???????? cc }
            // n = 7, score = 100
            //   cc                   | cmp                 eax, ebx
            //   488d4c2438           | je                  0x1775
            //   e8????????           |                     
            //   488d150f430700       | dec                 eax
            //   488d4c2438           | mov                 edx, dword ptr [ebp - 0x80]
            //   e8????????           |                     
            //   cc                   | dec                 eax

        $sequence_2 = { e8???????? 48896b10 488bf0 48897b18 4885ed 740c 498bc7 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   48896b10             | lea                 ecx, [esp + 0x28]
            //   488bf0               | mov                 esi, 1
            //   48897b18             | and                 dword ptr [ebx + 8], 0
            //   4885ed               | dec                 eax
            //   740c                 | lea                 eax, [0x68a1f]
            //   498bc7               | dec                 eax

        $sequence_3 = { 7203 488b00 488b4f58 4c8bc8 4533c0 ba43010000 ff15???????? }
            // n = 7, score = 100
            //   7203                 | sub                 eax, ecx
            //   488b00               | dec                 eax
            //   488b4f58             | add                 eax, -8
            //   4c8bc8               | dec                 eax
            //   4533c0               | cmp                 eax, 0x1f
            //   ba43010000           | ja                  0x20c
            //   ff15????????         |                     

        $sequence_4 = { 4c89642428 48c1f905 498bc0 488bd1 4c896c2420 48d1ea 482bc2 }
            // n = 7, score = 100
            //   4c89642428           | dec                 eax
            //   48c1f905             | mov                 ecx, dword ptr [eax + 0x10]
            //   498bc0               | dec                 eax
            //   488bd1               | test                ecx, ecx
            //   4c896c2420           | dec                 eax
            //   48d1ea               | mov                 dword ptr [ebx], eax
            //   482bc2               | dec                 eax

        $sequence_5 = { 4d03cc 4983791808 7203 4d8b09 4d8bc6 ba81010000 488b8eb8000000 }
            // n = 7, score = 100
            //   4d03cc               | mov                 dword ptr [esp + 0x28], ebp
            //   4983791808           | dec                 eax
            //   7203                 | mov                 esi, eax
            //   4d8b09               | dec                 eax
            //   4d8bc6               | mov                 dword ptr [esp + 0x58], ebp
            //   ba81010000           | mov                 ecx, 0x20
            //   488b8eb8000000       | dec                 eax

        $sequence_6 = { e8???????? e9???????? 2ddb270000 83f840 0f8791050000 4898 4c8d052701fcff }
            // n = 7, score = 100
            //   e8????????           |                     
            //   e9????????           |                     
            //   2ddb270000           | dec                 eax
            //   83f840               | sub                 esp, 0xc0
            //   0f8791050000         | dec                 eax
            //   4898                 | mov                 dword ptr [ebp - 0x69], 0xfffffffe
            //   4c8d052701fcff       | dec                 eax

        $sequence_7 = { eb02 32c0 84c0 480f45ca 488d4101 488903 488bcb }
            // n = 7, score = 100
            //   eb02                 | dec                 eax
            //   32c0                 | lea                 ecx, [ebp + 0x410]
            //   84c0                 | dec                 eax
            //   480f45ca             | lea                 ecx, [ebp + 0x430]
            //   488d4101             | inc                 ecx
            //   488903               | mov                 esi, esp
            //   488bcb               | dec                 eax

        $sequence_8 = { 7421 f6c108 750a 410fb600 2c28 3c01 760f }
            // n = 7, score = 100
            //   7421                 | dec                 eax
            //   f6c108               | sub                 ebx, dword ptr [ebp - 0x59]
            //   750a                 | dec                 eax
            //   410fb600             | mov                 edx, dword ptr [edi + 0x10]
            //   2c28                 | dec                 ecx
            //   3c01                 | mov                 eax, esp
            //   760f                 | dec                 eax

        $sequence_9 = { 742d 83600800 488d05170e0600 488907 c6474401 4533c0 }
            // n = 6, score = 100
            //   742d                 | lea                 edx, [esi + 1]
            //   83600800             | dec                 eax
            //   488d05170e0600       | lea                 ecx, [esp + 0x30]
            //   488907               | dec                 eax
            //   c6474401             | mov                 dword ptr [esp + 0x30], eax
            //   4533c0               | dec                 esp

    condition:
        7 of them and filesize < 2659328
}