rule win_rook_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.rook."
        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.rook"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 4c8bf1 488b0d???????? ba08000000 41b840000100 ff15???????? 488be8 4885c0 }
            // n = 7, score = 100
            //   4c8bf1               | cmp                 eax, -1
            //   488b0d????????       |                     
            //   ba08000000           | dec                 eax
            //   41b840000100         | lea                 edx, [esp + 0x40]
            //   ff15????????         |                     
            //   488be8               | dec                 eax
            //   4885c0               | mov                 ecx, esi

        $sequence_1 = { 0f1f4000 0f1f840000000000 33db 488bfd 6666660f1f840000000000 488b0f 488d54244c }
            // n = 7, score = 100
            //   0f1f4000             | xor                 eax, eax
            //   0f1f840000000000     | inc                 ecx
            //   33db                 | lea                 edx, [eax + 1]
            //   488bfd               | mov                 edx, 8
            //   6666660f1f840000000000     | inc    ebp
            //   488b0f               | xor                 eax, eax
            //   488d54244c           | inc                 ecx

        $sequence_2 = { 4156 0fb64201 4c8d359f9cfdff 440fb60a 498bf8 }
            // n = 5, score = 100
            //   4156                 | lea                 eax, [0x41532]
            //   0fb64201             | ret                 
            //   4c8d359f9cfdff       | dec                 eax
            //   440fb60a             | lea                 ecx, [0x4bb39]
            //   498bf8               | dec                 eax

        $sequence_3 = { ff15???????? ffc0 4898 4d8d3446 83ed01 7586 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   ffc0                 | dec                 eax
            //   4898                 | mov                 dword ptr [edi + 0xa8], eax
            //   4d8d3446             | dec                 eax
            //   83ed01               | lea                 eax, [0x28958]
            //   7586                 | mov                 dword ptr [edi + 0x98], 1

        $sequence_4 = { 488987a8000000 488d05749c0200 c7879800000001000000 48c787a000000004000000 48894760 488d055c990200 }
            // n = 6, score = 100
            //   488987a8000000       | test                eax, eax
            //   488d05749c0200       | dec                 eax
            //   c7879800000001000000     | lea    ecx, [0x44163]
            //   48c787a000000004000000     | dec    eax
            //   48894760             | test                eax, eax
            //   488d055c990200       | jne                 0x1989

        $sequence_5 = { 448b442408 03d0 488d0560640200 031488 418bc8 03d3 }
            // n = 6, score = 100
            //   448b442408           | jb                  0x14be
            //   03d0                 | inc                 esp
            //   488d0560640200       | mov                 dword ptr [esp + 0xc0], esi
            //   031488               | dec                 eax
            //   418bc8               | arpl                word ptr [esp + 0xc0], ax
            //   03d3                 | dec                 ecx

        $sequence_6 = { ff15???????? 4c8be0 4885c0 74e3 0f1f00 488b0d???????? }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   4c8be0               | lea                 esi, [0xfffd9c9f]
            //   4885c0               | inc                 esp
            //   74e3                 | movzx               ecx, byte ptr [edx]
            //   0f1f00               | dec                 ecx
            //   488b0d????????       |                     

        $sequence_7 = { 0f8e91020000 4c8d2d8e88ffff 418bd8 418bc8 48c1e910 440fb6c1 418bfa }
            // n = 7, score = 100
            //   0f8e91020000         | jmp                 0x6d9
            //   4c8d2d8e88ffff       | dec                 eax
            //   418bd8               | mov                 eax, ebx
            //   418bc8               | dec                 ecx
            //   48c1e910             | xchg                dword ptr [edi + esi*8 + 0x55010], eax
            //   440fb6c1             | dec                 eax
            //   418bfa               | test                eax, eax

        $sequence_8 = { 4c8d0d169f0000 c5f35cca c4c173590cc1 4c8d0de58e0000 c5f359c1 c5fb101d???????? c5fb102d???????? }
            // n = 7, score = 100
            //   4c8d0d169f0000       | jne                 0x225
            //   c5f35cca             | dec                 eax
            //   c4c173590cc1         | mov                 dword ptr [esp + 0x40], ebx
            //   4c8d0de58e0000       | mov                 ebx, dword ptr [esp + 0x50]
            //   c5f359c1             | dec                 eax
            //   c5fb101d????????     |                     
            //   c5fb102d????????     |                     

        $sequence_9 = { 7452 6666660f1f840000000000 0fb713 418d4901 4883c002 4883c302 450fb7c2 }
            // n = 7, score = 100
            //   7452                 | movzx               edx, byte ptr [ecx + esi + 0x59970]
            //   6666660f1f840000000000     | inc    edx
            //   0fb713               | movzx               eax, byte ptr [eax + esi + 0x59970]
            //   418d4901             | movzx               ecx, al
            //   4883c002             | mov                 eax, esi
            //   4883c302             | dec                 eax
            //   450fb7c2             | shr                 eax, 0x18

    condition:
        7 of them and filesize < 843776
}