rule win_halfrig_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.halfrig."
        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.halfrig"
        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 = { 75c0 430fb6041a 4138041a 0f84a5040000 418b0424 3905???????? 7e48 }
            // n = 7, score = 100
            //   75c0                 | dec                 eax
            //   430fb6041a           | lea                 ecx, [0x7c968]
            //   4138041a             | mov                 byte ptr [edx], al
            //   0f84a5040000         | dec                 eax
            //   418b0424             | lea                 edx, [esp + 0x20]
            //   3905????????         |                     
            //   7e48                 | dec                 eax

        $sequence_1 = { 8802 488d9530030000 e8???????? 488d0dddd30600 e8???????? 33ff 48bb0b9109194dfd9bf3 }
            // n = 7, score = 100
            //   8802                 | lea                 ecx, [0x49d62]
            //   488d9530030000       | je                  0xeff
            //   e8????????           |                     
            //   488d0dddd30600       | dec                 esp
            //   e8????????           |                     
            //   33ff                 | lea                 eax, [0x48b34]
            //   48bb0b9109194dfd9bf3     | dec    esp

        $sequence_2 = { 488d0d4c3a0700 e8???????? 40383d???????? 7435 488bd3 4c8bc7 43301438 }
            // n = 7, score = 100
            //   488d0d4c3a0700       | dec                 ecx
            //   e8????????           |                     
            //   40383d????????       |                     
            //   7435                 | cmp                 eax, 0x401
            //   488bd3               | jb                  0x4a7
            //   4c8bc7               | dec                 eax
            //   43301438             | lea                 ecx, [ebp + 0x330]

        $sequence_3 = { 8802 488d542420 e8???????? 488d0d20bd0700 e8???????? 40383d???????? 7435 }
            // n = 7, score = 100
            //   8802                 | dec                 eax
            //   488d542420           | lea                 ebx, [0x42b5f]
            //   e8????????           |                     
            //   488d0d20bd0700       | dec                 eax
            //   e8????????           |                     
            //   40383d????????       |                     
            //   7435                 | lea                 edi, [0x42b58]

        $sequence_4 = { 4883ea01 75ad 488b5370 488bcb e8???????? ba04010000 488d8b80010000 }
            // n = 7, score = 100
            //   4883ea01             | dec                 eax
            //   75ad                 | lea                 ecx, [ecx + 0x80]
            //   488b5370             | movups              xmm0, xmmword ptr [eax]
            //   488bcb               | dec                 eax
            //   e8????????           |                     
            //   ba04010000           | lea                 ecx, [ebp + 0x330]
            //   488d8b80010000       | dec                 eax

        $sequence_5 = { 488dac24c0f8ffff 4881ec40080000 be08000000 488d4c2420 8bd6 488d055a500400 66660f1f840000000000 }
            // n = 7, score = 100
            //   488dac24c0f8ffff     | lea                 eax, [0x4319c]
            //   4881ec40080000       | dec                 eax
            //   be08000000           | mov                 edx, esi
            //   488d4c2420           | nop                 word ptr [eax + eax]
            //   8bd6                 | dec                 eax
            //   488d055a500400       | lea                 ecx, [ecx + 0x80]
            //   66660f1f840000000000     | dec    eax

        $sequence_6 = { 488d0d3fb30800 e8???????? 833d????????ff 0f858a000000 488d542420 4c8bc6 488d8530030000 }
            // n = 7, score = 100
            //   488d0d3fb30800       | jb                  0x320
            //   e8????????           |                     
            //   833d????????ff       |                     
            //   0f858a000000         | dec                 eax
            //   488d542420           | lea                 ecx, [ebp + 0x330]
            //   4c8bc6               | dec                 eax
            //   488d8530030000       | lea                 eax, [0x2f16c]

        $sequence_7 = { 40883d???????? 4c893d???????? 488d8d30030000 488d058c2e0400 488bd6 660f1f840000000000 488d8980000000 }
            // n = 7, score = 100
            //   40883d????????       |                     
            //   4c893d????????       |                     
            //   488d8d30030000       | movups              xmm0, xmmword ptr [eax]
            //   488d058c2e0400       | movups              xmm1, xmmword ptr [eax + 0x10]
            //   488bd6               | dec                 eax
            //   660f1f840000000000     | lea    eax, [0x452aa]
            //   488d8980000000       | nop                 word ptr [eax + eax]

        $sequence_8 = { 488d0d277a0400 c705????????679f9b01 c705????????6990e984 c705????????3d6d27f5 e8???????? 403835???????? 4c8d0d0e7b0400 }
            // n = 7, score = 100
            //   488d0d277a0400       | jb                  0x1ed0
            //   c705????????679f9b01     |     
            //   c705????????6990e984     |     
            //   c705????????3d6d27f5     |     
            //   e8????????           |                     
            //   403835????????       |                     
            //   4c8d0d0e7b0400       | dec                 eax

        $sequence_9 = { 408835???????? 418b06 4c898b30030000 4088b338030000 3905???????? 7e3f 488d0d38820400 }
            // n = 7, score = 100
            //   408835????????       |                     
            //   418b06               | movups              xmm0, xmmword ptr [eax]
            //   4c898b30030000       | movups              xmm1, xmmword ptr [eax + 0x10]
            //   4088b338030000       | dec                 eax
            //   3905????????         |                     
            //   7e3f                 | lea                 eax, [0x43e4c]
            //   488d0d38820400       | dec                 eax

    condition:
        7 of them and filesize < 1369088
}