rule win_homefry_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.homefry."
        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.homefry"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 731f c705????????08000000 eb13 bb06000000 488d3d14290000 }
            // n = 5, score = 100
            //   731f                 | dec                 esp
            //   c705????????08000000     |     
            //   eb13                 | mov                 dword ptr [esp + 0x58], edi
            //   bb06000000           | inc                 ebp
            //   488d3d14290000       | lea                 ecx, [esi + 4]

        $sequence_1 = { 4157 4883ec20 448bf2 488bf1 498bf8 498d4e08 }
            // n = 6, score = 100
            //   4157                 | dec                 eax
            //   4883ec20             | mov                 ecx, ebx
            //   448bf2               | test                eax, eax
            //   488bf1               | jne                 0x68f
            //   498bf8               | dec                 eax
            //   498d4e08             | mov                 ecx, ebx

        $sequence_2 = { 4883ec40 488b0d???????? 488d15471f0000 4533f6 ff15???????? }
            // n = 5, score = 100
            //   4883ec40             | cmp                 ebx, ebp
            //   488b0d????????       |                     
            //   488d15471f0000       | test                eax, eax
            //   4533f6               | je                  0x566
            //   ff15????????         |                     

        $sequence_3 = { b857866f44 410fb63a f7e3 8bc3 2bc2 d1e8 }
            // n = 6, score = 100
            //   b857866f44           | test                ecx, ecx
            //   410fb63a             | jne                 0x38
            //   f7e3                 | add                 ebx, eax
            //   8bc3                 | dec                 ecx
            //   2bc2                 | dec                 edx
            //   d1e8                 | jne                 0x2a

        $sequence_4 = { 7416 8b0c2b 8bc3 390e 750d 8b4c2b04 394e04 }
            // n = 7, score = 100
            //   7416                 | mov                 dword ptr [ebx], ebp
            //   8b0c2b               | dec                 eax
            //   8bc3                 | arpl                word ptr [eax + ebx], cx
            //   390e                 | dec                 esp
            //   750d                 | add                 eax, ebx
            //   8b4c2b04             | inc                 eax
            //   394e04               | mov                 byte ptr [edx], bh

        $sequence_5 = { 488d15bf200000 488d0da8200000 488905???????? e8???????? ff05???????? b801000000 }
            // n = 6, score = 100
            //   488d15bf200000       | je                  0xba
            //   488d0da8200000       | inc                 ecx
            //   488905????????       |                     
            //   e8????????           |                     
            //   ff05????????         |                     
            //   b801000000           | mov                 eax, dword ptr [esi + ebx]

        $sequence_6 = { ff15???????? 4c8b0d???????? 458d4708 488d542458 488bce }
            // n = 5, score = 100
            //   ff15????????         |                     
            //   4c8b0d????????       |                     
            //   458d4708             | add                 edx, ecx
            //   488d542458           | xor                 ebp, ebp
            //   488bce               | inc                 ebp

        $sequence_7 = { 448d50ff 66660f1f840000000000 0fb601 c1e304 }
            // n = 4, score = 100
            //   448d50ff             | dec                 ecx
            //   66660f1f840000000000     | arpl    cx, dx
            //   0fb601               | inc                 ecx
            //   c1e304               | cmp                 ecx, 1

        $sequence_8 = { e8???????? eb05 e8???????? 84c0 7511 488d0ddd180000 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   eb05                 | lea                 eax, [edi + 0x68]
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   7511                 | je                  0x1da
            //   488d0ddd180000       | xor                 edi, edi

        $sequence_9 = { 2bf0 488d2d192a0000 488bc5 397008 }
            // n = 4, score = 100
            //   2bf0                 | js                  0xfc
            //   488d2d192a0000       | dec                 eax
            //   488bc5               | lea                 eax, [esp + 0x80]
            //   397008               | inc                 ebp

    condition:
        7 of them and filesize < 65536
}