rule win_roopy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "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 = { 55 89c5 8d8588fdffff e8???????? 5d c3 55 }
            // n = 7, score = 300
            //   55                   | push                ebp
            //   89c5                 | mov                 ebp, eax
            //   8d8588fdffff         | lea                 eax, [ebp - 0x278]
            //   e8????????           |                     
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_1 = { 8b45f8 66c740541c00 c745f401000000 837df800 7411 837dfc00 740b }
            // n = 7, score = 300
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   66c740541c00         | mov                 word ptr [eax + 0x54], 0x1c
            //   c745f401000000       | mov                 dword ptr [ebp - 0xc], 1
            //   837df800             | cmp                 dword ptr [ebp - 8], 0
            //   7411                 | je                  0x13
            //   837dfc00             | cmp                 dword ptr [ebp - 4], 0
            //   740b                 | je                  0xd

        $sequence_2 = { 83ae8800000001 8d7600 eb39 89f0 e8???????? 84c0 740c }
            // n = 7, score = 300
            //   83ae8800000001       | sub                 dword ptr [esi + 0x88], 1
            //   8d7600               | lea                 esi, [esi]
            //   eb39                 | jmp                 0x3b
            //   89f0                 | mov                 eax, esi
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   740c                 | je                  0xe

        $sequence_3 = { e8???????? 8d45d8 30c9 6631d2 e8???????? 6a00 8b45ec }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8d45d8               | lea                 eax, [ebp - 0x28]
            //   30c9                 | xor                 cl, cl
            //   6631d2               | xor                 dx, dx
            //   e8????????           |                     
            //   6a00                 | push                0
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]

        $sequence_4 = { dd5dd0 dd45d0 8d6424f8 dd1c24 8b45fc 8b4020 8b55fc }
            // n = 7, score = 300
            //   dd5dd0               | fstp                qword ptr [ebp - 0x30]
            //   dd45d0               | fld                 qword ptr [ebp - 0x30]
            //   8d6424f8             | lea                 esp, [esp - 8]
            //   dd1c24               | fstp                qword ptr [esp]
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8b4020               | mov                 eax, dword ptr [eax + 0x20]
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]

        $sequence_5 = { 53 89c5 8d6424fc 8b45fc e8???????? 80bdacfeffff00 0f8454010000 }
            // n = 7, score = 300
            //   53                   | push                ebx
            //   89c5                 | mov                 ebp, eax
            //   8d6424fc             | lea                 esp, [esp - 4]
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   e8????????           |                     
            //   80bdacfeffff00       | cmp                 byte ptr [ebp - 0x154], 0
            //   0f8454010000         | je                  0x15a

        $sequence_6 = { 8b40fc 3d04010000 0f8e91000000 89da b901000000 b8???????? e8???????? }
            // n = 7, score = 300
            //   8b40fc               | mov                 eax, dword ptr [eax - 4]
            //   3d04010000           | cmp                 eax, 0x104
            //   0f8e91000000         | jle                 0x97
            //   89da                 | mov                 edx, ebx
            //   b901000000           | mov                 ecx, 1
            //   b8????????           |                     
            //   e8????????           |                     

        $sequence_7 = { e8???????? a1???????? 85c0 7404 8b40fc 40 }
            // n = 6, score = 300
            //   e8????????           |                     
            //   a1????????           |                     
            //   85c0                 | test                eax, eax
            //   7404                 | je                  6
            //   8b40fc               | mov                 eax, dword ptr [eax - 4]
            //   40                   | inc                 eax

        $sequence_8 = { 648920 8b45f8 8b4dd4 8b90c0000000 89511c }
            // n = 5, score = 300
            //   648920               | mov                 dword ptr fs:[eax], esp
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8b4dd4               | mov                 ecx, dword ptr [ebp - 0x2c]
            //   8b90c0000000         | mov                 edx, dword ptr [eax + 0xc0]
            //   89511c               | mov                 dword ptr [ecx + 0x1c], edx

        $sequence_9 = { 89c3 89d6 89f8 e8???????? 39d6 7c06 7f0a }
            // n = 7, score = 300
            //   89c3                 | mov                 ebx, eax
            //   89d6                 | mov                 esi, edx
            //   89f8                 | mov                 eax, edi
            //   e8????????           |                     
            //   39d6                 | cmp                 esi, edx
            //   7c06                 | jl                  8
            //   7f0a                 | jg                  0xc

    condition:
        7 of them and filesize < 739328
}