rule win_r980_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "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 = { 5f 5e 744d 8b4dfc 33cd e8???????? 8be5 }
            // n = 7, score = 200
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   744d                 | je                  0x4f
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   33cd                 | xor                 ecx, ebp
            //   e8????????           |                     
            //   8be5                 | mov                 esp, ebp

        $sequence_1 = { a1???????? 33c5 50 8d45f4 64a300000000 8bf1 8d45d8 }
            // n = 7, score = 200
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   50                   | push                eax
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   8bf1                 | mov                 esi, ecx
            //   8d45d8               | lea                 eax, [ebp - 0x28]

        $sequence_2 = { 740d 8b16 85d2 75ed 5e 5f 5b }
            // n = 7, score = 200
            //   740d                 | je                  0xf
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   85d2                 | test                edx, edx
            //   75ed                 | jne                 0xffffffef
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx

        $sequence_3 = { 8b442428 89551c 0f85b9feffff 8b4520 83fa10 0f8296000000 8bc8 }
            // n = 7, score = 200
            //   8b442428             | mov                 eax, dword ptr [esp + 0x28]
            //   89551c               | mov                 dword ptr [ebp + 0x1c], edx
            //   0f85b9feffff         | jne                 0xfffffebf
            //   8b4520               | mov                 eax, dword ptr [ebp + 0x20]
            //   83fa10               | cmp                 edx, 0x10
            //   0f8296000000         | jb                  0x9c
            //   8bc8                 | mov                 ecx, eax

        $sequence_4 = { 837e3400 8b5d30 7726 8b06 8bce ff5020 3bc3 }
            // n = 7, score = 200
            //   837e3400             | cmp                 dword ptr [esi + 0x34], 0
            //   8b5d30               | mov                 ebx, dword ptr [ebp + 0x30]
            //   7726                 | ja                  0x28
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   8bce                 | mov                 ecx, esi
            //   ff5020               | call                dword ptr [eax + 0x20]
            //   3bc3                 | cmp                 eax, ebx

        $sequence_5 = { 66894dd8 8d4dd8 50 c745ec07000000 c745e800000000 e8???????? 8d4e60 }
            // n = 7, score = 200
            //   66894dd8             | mov                 word ptr [ebp - 0x28], cx
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]
            //   50                   | push                eax
            //   c745ec07000000       | mov                 dword ptr [ebp - 0x14], 7
            //   c745e800000000       | mov                 dword ptr [ebp - 0x18], 0
            //   e8????????           |                     
            //   8d4e60               | lea                 ecx, [esi + 0x60]

        $sequence_6 = { c785acfdffff00000000 6689859cfdffff 663985e8fdffff 7419 8d85e8fdffff 8d5002 }
            // n = 6, score = 200
            //   c785acfdffff00000000     | mov    dword ptr [ebp - 0x254], 0
            //   6689859cfdffff       | mov                 word ptr [ebp - 0x264], ax
            //   663985e8fdffff       | cmp                 word ptr [ebp - 0x218], ax
            //   7419                 | je                  0x1b
            //   8d85e8fdffff         | lea                 eax, [ebp - 0x218]
            //   8d5002               | lea                 edx, [eax + 2]

        $sequence_7 = { e8???????? 8bf0 8975ec c745fc02000000 c745f0dc214f00 6a20 56 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   8975ec               | mov                 dword ptr [ebp - 0x14], esi
            //   c745fc02000000       | mov                 dword ptr [ebp - 4], 2
            //   c745f0dc214f00       | mov                 dword ptr [ebp - 0x10], 0x4f21dc
            //   6a20                 | push                0x20
            //   56                   | push                esi

        $sequence_8 = { e8???????? 53 56 e8???????? 83c408 84c0 7456 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   53                   | push                ebx
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   84c0                 | test                al, al
            //   7456                 | je                  0x58

        $sequence_9 = { 8b01 8b4004 f644080c06 742c ff75e8 8d4d68 e8???????? }
            // n = 7, score = 200
            //   8b01                 | mov                 eax, dword ptr [ecx]
            //   8b4004               | mov                 eax, dword ptr [eax + 4]
            //   f644080c06           | test                byte ptr [eax + ecx + 0xc], 6
            //   742c                 | je                  0x2e
            //   ff75e8               | push                dword ptr [ebp - 0x18]
            //   8d4d68               | lea                 ecx, [ebp + 0x68]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 3178496
}