rule win_deadwood_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 6a20 8d4dac 51 57 57 6800005600 }
            // n = 6, score = 100
            //   6a20                 | push                0x20
            //   8d4dac               | lea                 ecx, [ebp - 0x54]
            //   51                   | push                ecx
            //   57                   | push                edi
            //   57                   | push                edi
            //   6800005600           | push                0x560000

        $sequence_1 = { ff2495d87a4000 8b7508 6a05 56 e8???????? 83c408 8bc6 }
            // n = 7, score = 100
            //   ff2495d87a4000       | jmp                 dword ptr [edx*4 + 0x407ad8]
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   6a05                 | push                5
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8bc6                 | mov                 eax, esi

        $sequence_2 = { 50 a1???????? 8b5018 b9???????? ffd2 884604 c74608???????? }
            // n = 7, score = 100
            //   50                   | push                eax
            //   a1????????           |                     
            //   8b5018               | mov                 edx, dword ptr [eax + 0x18]
            //   b9????????           |                     
            //   ffd2                 | call                edx
            //   884604               | mov                 byte ptr [esi + 4], al
            //   c74608????????       |                     

        $sequence_3 = { c706???????? c7460c40bb4500 8b4804 8d7e0c c744312030bb4500 8b5620 8b4204 }
            // n = 7, score = 100
            //   c706????????         |                     
            //   c7460c40bb4500       | mov                 dword ptr [esi + 0xc], 0x45bb40
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   8d7e0c               | lea                 edi, [esi + 0xc]
            //   c744312030bb4500     | mov                 dword ptr [ecx + esi + 0x20], 0x45bb30
            //   8b5620               | mov                 edx, dword ptr [esi + 0x20]
            //   8b4204               | mov                 eax, dword ptr [edx + 4]

        $sequence_4 = { 0f8738ffffff 8b4c242c f605????????20 7446 8b442430 2bc1 c1f803 }
            // n = 7, score = 100
            //   0f8738ffffff         | ja                  0xffffff3e
            //   8b4c242c             | mov                 ecx, dword ptr [esp + 0x2c]
            //   f605????????20       |                     
            //   7446                 | je                  0x48
            //   8b442430             | mov                 eax, dword ptr [esp + 0x30]
            //   2bc1                 | sub                 eax, ecx
            //   c1f803               | sar                 eax, 3

        $sequence_5 = { e8???????? c645fcb9 68???????? b9???????? e8???????? 68???????? b9???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   c645fcb9             | mov                 byte ptr [ebp - 4], 0xb9
            //   68????????           |                     
            //   b9????????           |                     
            //   e8????????           |                     
            //   68????????           |                     
            //   b9????????           |                     

        $sequence_6 = { c645fc01 e8???????? 8b00 894508 8907 c645fc00 8b4510 }
            // n = 7, score = 100
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   e8????????           |                     
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   8907                 | mov                 dword ptr [edi], eax
            //   c645fc00             | mov                 byte ptr [ebp - 4], 0
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]

        $sequence_7 = { 8b4de0 8845bc 8b55bc 894dc4 8955c8 895dcc 8b470c }
            // n = 7, score = 100
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]
            //   8845bc               | mov                 byte ptr [ebp - 0x44], al
            //   8b55bc               | mov                 edx, dword ptr [ebp - 0x44]
            //   894dc4               | mov                 dword ptr [ebp - 0x3c], ecx
            //   8955c8               | mov                 dword ptr [ebp - 0x38], edx
            //   895dcc               | mov                 dword ptr [ebp - 0x34], ebx
            //   8b470c               | mov                 eax, dword ptr [edi + 0xc]

        $sequence_8 = { c645fcb4 e8???????? 68???????? b9???????? c645fcb5 e8???????? 68???????? }
            // n = 7, score = 100
            //   c645fcb4             | mov                 byte ptr [ebp - 4], 0xb4
            //   e8????????           |                     
            //   68????????           |                     
            //   b9????????           |                     
            //   c645fcb5             | mov                 byte ptr [ebp - 4], 0xb5
            //   e8????????           |                     
            //   68????????           |                     

        $sequence_9 = { 56 8b7508 53 894dfc 57 8d4900 }
            // n = 6, score = 100
            //   56                   | push                esi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   57                   | push                edi
            //   8d4900               | lea                 ecx, [ecx]

    condition:
        7 of them and filesize < 1055744
}