rule win_deadwood_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "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 = { 53 ff15???????? 57 ff15???????? 8bc6 8b4df4 64890d00000000 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   57                   | push                edi
            //   ff15????????         |                     
            //   8bc6                 | mov                 eax, esi
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   64890d00000000       | mov                 dword ptr fs:[0], ecx

        $sequence_1 = { 83c404 8d8d20ffffff c745e80f000000 895de4 885dd4 885dfc e8???????? }
            // n = 7, score = 100
            //   83c404               | add                 esp, 4
            //   8d8d20ffffff         | lea                 ecx, [ebp - 0xe0]
            //   c745e80f000000       | mov                 dword ptr [ebp - 0x18], 0xf
            //   895de4               | mov                 dword ptr [ebp - 0x1c], ebx
            //   885dd4               | mov                 byte ptr [ebp - 0x2c], bl
            //   885dfc               | mov                 byte ptr [ebp - 4], bl
            //   e8????????           |                     

        $sequence_2 = { 85c0 751d 8b4d08 51 68???????? 8d57ff 52 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   751d                 | jne                 0x1f
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   51                   | push                ecx
            //   68????????           |                     
            //   8d57ff               | lea                 edx, [edi - 1]
            //   52                   | push                edx

        $sequence_3 = { 33db 895dfc 8d4dbc 895de8 e8???????? b801000000 8945fc }
            // n = 7, score = 100
            //   33db                 | xor                 ebx, ebx
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   8d4dbc               | lea                 ecx, [ebp - 0x44]
            //   895de8               | mov                 dword ptr [ebp - 0x18], ebx
            //   e8????????           |                     
            //   b801000000           | mov                 eax, 1
            //   8945fc               | mov                 dword ptr [ebp - 4], eax

        $sequence_4 = { 83c40c 83bdd4feffff03 0f8580010000 895dbc 895dc0 895dc4 83ec08 }
            // n = 7, score = 100
            //   83c40c               | add                 esp, 0xc
            //   83bdd4feffff03       | cmp                 dword ptr [ebp - 0x12c], 3
            //   0f8580010000         | jne                 0x186
            //   895dbc               | mov                 dword ptr [ebp - 0x44], ebx
            //   895dc0               | mov                 dword ptr [ebp - 0x40], ebx
            //   895dc4               | mov                 dword ptr [ebp - 0x3c], ebx
            //   83ec08               | sub                 esp, 8

        $sequence_5 = { 8b5014 8d4c2424 51 8bce ffd2 8b7604 3bf3 }
            // n = 7, score = 100
            //   8b5014               | mov                 edx, dword ptr [eax + 0x14]
            //   8d4c2424             | lea                 ecx, [esp + 0x24]
            //   51                   | push                ecx
            //   8bce                 | mov                 ecx, esi
            //   ffd2                 | call                edx
            //   8b7604               | mov                 esi, dword ptr [esi + 4]
            //   3bf3                 | cmp                 esi, ebx

        $sequence_6 = { 85f6 0f8486000000 c7462014104600 83c7d8 c7462864b94500 b801000000 8845fc }
            // n = 7, score = 100
            //   85f6                 | test                esi, esi
            //   0f8486000000         | je                  0x8c
            //   c7462014104600       | mov                 dword ptr [esi + 0x20], 0x461014
            //   83c7d8               | add                 edi, -0x28
            //   c7462864b94500       | mov                 dword ptr [esi + 0x28], 0x45b964
            //   b801000000           | mov                 eax, 1
            //   8845fc               | mov                 byte ptr [ebp - 4], al

        $sequence_7 = { 68ffff0000 ff15???????? 6a01 ff15???????? 68e8030000 ff15???????? e9???????? }
            // n = 7, score = 100
            //   68ffff0000           | push                0xffff
            //   ff15????????         |                     
            //   6a01                 | push                1
            //   ff15????????         |                     
            //   68e8030000           | push                0x3e8
            //   ff15????????         |                     
            //   e9????????           |                     

        $sequence_8 = { 51 e8???????? 83c404 33d2 89bd64ffffff 899d60ffffff 66899550ffffff }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   33d2                 | xor                 edx, edx
            //   89bd64ffffff         | mov                 dword ptr [ebp - 0x9c], edi
            //   899d60ffffff         | mov                 dword ptr [ebp - 0xa0], ebx
            //   66899550ffffff       | mov                 word ptr [ebp - 0xb0], dx

        $sequence_9 = { 8b7518 85f6 742a 8d4604 83c9ff f00fc108 751e }
            // n = 7, score = 100
            //   8b7518               | mov                 esi, dword ptr [ebp + 0x18]
            //   85f6                 | test                esi, esi
            //   742a                 | je                  0x2c
            //   8d4604               | lea                 eax, [esi + 4]
            //   83c9ff               | or                  ecx, 0xffffffff
            //   f00fc108             | lock xadd           dword ptr [eax], ecx
            //   751e                 | jne                 0x20

    condition:
        7 of them and filesize < 1055744
}