rule win_deadwood_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.deadwood."
        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.deadwood"
        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 = { dd1a 83c608 83c108 dd18 e9???????? 83eb08 3b4d10 }
            // n = 7, score = 100
            //   dd1a                 | fstp                qword ptr [edx]
            //   83c608               | add                 esi, 8
            //   83c108               | add                 ecx, 8
            //   dd18                 | fstp                qword ptr [eax]
            //   e9????????           |                     
            //   83eb08               | sub                 ebx, 8
            //   3b4d10               | cmp                 ecx, dword ptr [ebp + 0x10]

        $sequence_1 = { 03048dc0594700 eb02 8bc2 f6402480 0f8571ffffff 33f6 3bfe }
            // n = 7, score = 100
            //   03048dc0594700       | add                 eax, dword ptr [ecx*4 + 0x4759c0]
            //   eb02                 | jmp                 4
            //   8bc2                 | mov                 eax, edx
            //   f6402480             | test                byte ptr [eax + 0x24], 0x80
            //   0f8571ffffff         | jne                 0xffffff77
            //   33f6                 | xor                 esi, esi
            //   3bfe                 | cmp                 edi, esi

        $sequence_2 = { 8975d4 85c9 7c19 7f04 85c0 7413 3bce }
            // n = 7, score = 100
            //   8975d4               | mov                 dword ptr [ebp - 0x2c], esi
            //   85c9                 | test                ecx, ecx
            //   7c19                 | jl                  0x1b
            //   7f04                 | jg                  6
            //   85c0                 | test                eax, eax
            //   7413                 | je                  0x15
            //   3bce                 | cmp                 ecx, esi

        $sequence_3 = { 7562 8b45cc 50 6a00 8945c4 }
            // n = 5, score = 100
            //   7562                 | jne                 0x64
            //   8b45cc               | mov                 eax, dword ptr [ebp - 0x34]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   8945c4               | mov                 dword ptr [ebp - 0x3c], eax

        $sequence_4 = { 111d???????? f00fc101 a900000040 7518 3d00000080 7e11 8bd1 }
            // n = 7, score = 100
            //   111d????????         |                     
            //   f00fc101             | lock xadd           dword ptr [ecx], eax
            //   a900000040           | test                eax, 0x40000000
            //   7518                 | jne                 0x1a
            //   3d00000080           | cmp                 eax, 0x80000000
            //   7e11                 | jle                 0x13
            //   8bd1                 | mov                 edx, ecx

        $sequence_5 = { 8b8db0fdffff 51 e8???????? 83c404 be08000000 89bdc4fdffff 899dc0fdffff }
            // n = 7, score = 100
            //   8b8db0fdffff         | mov                 ecx, dword ptr [ebp - 0x250]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   be08000000           | mov                 esi, 8
            //   89bdc4fdffff         | mov                 dword ptr [ebp - 0x23c], edi
            //   899dc0fdffff         | mov                 dword ptr [ebp - 0x240], ebx

        $sequence_6 = { 57 68???????? 8d8d34ffffff e8???????? 0fb784dd50ffffff 50 }
            // n = 6, score = 100
            //   57                   | push                edi
            //   68????????           |                     
            //   8d8d34ffffff         | lea                 ecx, [ebp - 0xcc]
            //   e8????????           |                     
            //   0fb784dd50ffffff     | movzx               eax, word ptr [ebp + ebx*8 - 0xb0]
            //   50                   | push                eax

        $sequence_7 = { c74580f4074600 e8???????? 8b9578ffffff 8975c8 8955cc 897dd0 c745e80f000000 }
            // n = 7, score = 100
            //   c74580f4074600       | mov                 dword ptr [ebp - 0x80], 0x4607f4
            //   e8????????           |                     
            //   8b9578ffffff         | mov                 edx, dword ptr [ebp - 0x88]
            //   8975c8               | mov                 dword ptr [ebp - 0x38], esi
            //   8955cc               | mov                 dword ptr [ebp - 0x34], edx
            //   897dd0               | mov                 dword ptr [ebp - 0x30], edi
            //   c745e80f000000       | mov                 dword ptr [ebp - 0x18], 0xf

        $sequence_8 = { c7443248b0bb4500 8b4648 8b4804 c744314400000000 8bc6 8b4df4 64890d00000000 }
            // n = 7, score = 100
            //   c7443248b0bb4500     | mov                 dword ptr [edx + esi + 0x48], 0x45bbb0
            //   8b4648               | mov                 eax, dword ptr [esi + 0x48]
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   c744314400000000     | mov                 dword ptr [ecx + esi + 0x44], 0
            //   8bc6                 | mov                 eax, esi
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   64890d00000000       | mov                 dword ptr fs:[0], ecx

        $sequence_9 = { 33c4 50 8d442448 64a300000000 8b750c 8d4620 8bde }
            // n = 7, score = 100
            //   33c4                 | xor                 eax, esp
            //   50                   | push                eax
            //   8d442448             | lea                 eax, [esp + 0x48]
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   8b750c               | mov                 esi, dword ptr [ebp + 0xc]
            //   8d4620               | lea                 eax, [esi + 0x20]
            //   8bde                 | mov                 ebx, esi

    condition:
        7 of them and filesize < 1055744
}