rule win_r980_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.r980."
        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.r980"
        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 = { c3 8b4de0 e9???????? 8d4da0 e9???????? e8???????? c3 }
            // n = 7, score = 200
            //   c3                   | ret                 
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]
            //   e9????????           |                     
            //   8d4da0               | lea                 ecx, [ebp - 0x60]
            //   e9????????           |                     
            //   e8????????           |                     
            //   c3                   | ret                 

        $sequence_1 = { 84c0 7438 8b7510 85f6 7431 8b5f24 8d4f18 }
            // n = 7, score = 200
            //   84c0                 | test                al, al
            //   7438                 | je                  0x3a
            //   8b7510               | mov                 esi, dword ptr [ebp + 0x10]
            //   85f6                 | test                esi, esi
            //   7431                 | je                  0x33
            //   8b5f24               | mov                 ebx, dword ptr [edi + 0x24]
            //   8d4f18               | lea                 ecx, [edi + 0x18]

        $sequence_2 = { 837de800 7530 8b5614 83fa10 7204 8b06 eb02 }
            // n = 7, score = 200
            //   837de800             | cmp                 dword ptr [ebp - 0x18], 0
            //   7530                 | jne                 0x32
            //   8b5614               | mov                 edx, dword ptr [esi + 0x14]
            //   83fa10               | cmp                 edx, 0x10
            //   7204                 | jb                  6
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   eb02                 | jmp                 4

        $sequence_3 = { 8bce 6a00 50 e8???????? 8b4508 8930 8b4df4 }
            // n = 7, score = 200
            //   8bce                 | mov                 ecx, esi
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8930                 | mov                 dword ptr [eax], esi
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]

        $sequence_4 = { 50 8bce e8???????? c745fc01000000 8b7de8 85ff }
            // n = 6, score = 200
            //   50                   | push                eax
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1
            //   8b7de8               | mov                 edi, dword ptr [ebp - 0x18]
            //   85ff                 | test                edi, edi

        $sequence_5 = { 897944 eb05 bb01000000 56 c745fc00000000 e8???????? 83c404 }
            // n = 7, score = 200
            //   897944               | mov                 dword ptr [ecx + 0x44], edi
            //   eb05                 | jmp                 7
            //   bb01000000           | mov                 ebx, 1
            //   56                   | push                esi
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_6 = { c1e812 0cf0 0fb6c0 50 e8???????? 8bc3 8bcf }
            // n = 7, score = 200
            //   c1e812               | shr                 eax, 0x12
            //   0cf0                 | or                  al, 0xf0
            //   0fb6c0               | movzx               eax, al
            //   50                   | push                eax
            //   e8????????           |                     
            //   8bc3                 | mov                 eax, ebx
            //   8bcf                 | mov                 ecx, edi

        $sequence_7 = { f6c302 742c 8b45e8 83e3fd 83f808 720d 40 }
            // n = 7, score = 200
            //   f6c302               | test                bl, 2
            //   742c                 | je                  0x2e
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   83e3fd               | and                 ebx, 0xfffffffd
            //   83f808               | cmp                 eax, 8
            //   720d                 | jb                  0xf
            //   40                   | inc                 eax

        $sequence_8 = { 57 8d4e18 e8???????? 8b4618 8d4d0c 034624 6a01 }
            // n = 7, score = 200
            //   57                   | push                edi
            //   8d4e18               | lea                 ecx, [esi + 0x18]
            //   e8????????           |                     
            //   8b4618               | mov                 eax, dword ptr [esi + 0x18]
            //   8d4d0c               | lea                 ecx, [ebp + 0xc]
            //   034624               | add                 eax, dword ptr [esi + 0x24]
            //   6a01                 | push                1

        $sequence_9 = { 8945ec 8b75c4 8d8544ffffff 50 8d45c8 c645fc07 50 }
            // n = 7, score = 200
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax
            //   8b75c4               | mov                 esi, dword ptr [ebp - 0x3c]
            //   8d8544ffffff         | lea                 eax, [ebp - 0xbc]
            //   50                   | push                eax
            //   8d45c8               | lea                 eax, [ebp - 0x38]
            //   c645fc07             | mov                 byte ptr [ebp - 4], 7
            //   50                   | push                eax

    condition:
        7 of them and filesize < 3178496
}