rule win_roopy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.roopy."
        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.roopy"
        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 = { 8b45fc e8???????? 8d55dc 8b45e0 e8???????? }
            // n = 5, score = 300
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   e8????????           |                     
            //   8d55dc               | lea                 edx, [ebp - 0x24]
            //   8b45e0               | mov                 eax, dword ptr [ebp - 0x20]
            //   e8????????           |                     

        $sequence_1 = { 89d6 8dbd90fcffff b910000000 f3a4 }
            // n = 4, score = 300
            //   89d6                 | mov                 esi, edx
            //   8dbd90fcffff         | lea                 edi, [ebp - 0x370]
            //   b910000000           | mov                 ecx, 0x10
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]

        $sequence_2 = { 8d85d8feffff e8???????? 8d45e0 30c9 6631d2 e8???????? 0fb745fa }
            // n = 7, score = 300
            //   8d85d8feffff         | lea                 eax, [ebp - 0x128]
            //   e8????????           |                     
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   30c9                 | xor                 cl, cl
            //   6631d2               | xor                 dx, dx
            //   e8????????           |                     
            //   0fb745fa             | movzx               eax, word ptr [ebp - 6]

        $sequence_3 = { 668945ec 8b45d4 8b55d4 8b12 }
            // n = 4, score = 300
            //   668945ec             | mov                 word ptr [ebp - 0x14], ax
            //   8b45d4               | mov                 eax, dword ptr [ebp - 0x2c]
            //   8b55d4               | mov                 edx, dword ptr [ebp - 0x2c]
            //   8b12                 | mov                 edx, dword ptr [edx]

        $sequence_4 = { b902000000 8b1b ff9390000000 89f0 }
            // n = 4, score = 300
            //   b902000000           | mov                 ecx, 2
            //   8b1b                 | mov                 ebx, dword ptr [ebx]
            //   ff9390000000         | call                dword ptr [ebx + 0x90]
            //   89f0                 | mov                 eax, esi

        $sequence_5 = { 7f08 7c0c 837d8cff 7206 c6458401 eb04 c6458400 }
            // n = 7, score = 300
            //   7f08                 | jg                  0xa
            //   7c0c                 | jl                  0xe
            //   837d8cff             | cmp                 dword ptr [ebp - 0x74], -1
            //   7206                 | jb                  8
            //   c6458401             | mov                 byte ptr [ebp - 0x7c], 1
            //   eb04                 | jmp                 6
            //   c6458400             | mov                 byte ptr [ebp - 0x7c], 0

        $sequence_6 = { 8d6424f8 53 56 57 89c3 89d6 89c8 }
            // n = 7, score = 300
            //   8d6424f8             | lea                 esp, [esp - 8]
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   89c3                 | mov                 ebx, eax
            //   89d6                 | mov                 esi, edx
            //   89c8                 | mov                 eax, ecx

        $sequence_7 = { 8b45f4 e8???????? 84c0 7531 }
            // n = 4, score = 300
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   7531                 | jne                 0x33

        $sequence_8 = { 7505 b8???????? 50 e8???????? 6a00 a1???????? }
            // n = 6, score = 300
            //   7505                 | jne                 7
            //   b8????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   6a00                 | push                0
            //   a1????????           |                     

        $sequence_9 = { 0fb75006 69d280510100 01d1 0fb75002 69d2008d2700 01ca 0fb700 }
            // n = 7, score = 300
            //   0fb75006             | movzx               edx, word ptr [eax + 6]
            //   69d280510100         | imul                edx, edx, 0x15180
            //   01d1                 | add                 ecx, edx
            //   0fb75002             | movzx               edx, word ptr [eax + 2]
            //   69d2008d2700         | imul                edx, edx, 0x278d00
            //   01ca                 | add                 edx, ecx
            //   0fb700               | movzx               eax, word ptr [eax]

    condition:
        7 of them and filesize < 739328
}