rule win_homefry_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "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 = { 0f1f4000 660f1f840000000000 0fb601 488d4901 }
            // n = 4, score = 100
            //   0f1f4000             | je                  8
            //   660f1f840000000000     | nop    dword ptr [eax]
            //   0fb601               | dec                 ebp
            //   488d4901             | lea                 eax, [esi + 8]

        $sequence_1 = { 482b4c2430 480308 48890f 498bce }
            // n = 4, score = 100
            //   482b4c2430           | mov                 ecx, dword ptr [ecx]
            //   480308               | inc                 esp
            //   48890f               | mov                 ecx, dword ptr [esp + 0x78]
            //   498bce               | dec                 eax

        $sequence_2 = { 448d4508 0f45d9 488b08 488d9424a0000000 482b0d???????? 48030d???????? }
            // n = 6, score = 100
            //   448d4508             | dec                 eax
            //   0f45d9               | mov                 ecx, dword ptr [esp + 0x30]
            //   488b08               | dec                 eax
            //   488d9424a0000000     | mov                 ebx, eax
            //   482b0d????????       |                     
            //   48030d????????       |                     

        $sequence_3 = { b857866f44 410fb63a f7e3 8bc3 2bc2 d1e8 }
            // n = 6, score = 100
            //   b857866f44           | add                 edi, eax
            //   410fb63a             | dec                 eax
            //   f7e3                 | dec                 edx
            //   8bc3                 | jne                 0x13
            //   2bc2                 | mov                 eax, 0x446f8657
            //   d1e8                 | mul                 edi

        $sequence_4 = { 488d95a0010000 ff15???????? 85c0 75d4 488bcb }
            // n = 5, score = 100
            //   488d95a0010000       | dec                 eax
            //   ff15????????         |                     
            //   85c0                 | mov                 edi, eax
            //   75d4                 | dec                 eax
            //   488bcb               | cmp                 ebx, esi

        $sequence_5 = { 488d15bf200000 488d0da8200000 488905???????? e8???????? ff05???????? b801000000 }
            // n = 6, score = 100
            //   488d15bf200000       | sub                 edi, dword ptr [ebp - 0x20]
            //   488d0da8200000       | je                  0x54d
            //   488905????????       |                     
            //   e8????????           |                     
            //   ff05????????         |                     
            //   b801000000           | dec                 eax

        $sequence_6 = { 85c0 754c b910010000 ff15???????? 488b4c2478 }
            // n = 5, score = 100
            //   85c0                 | mov                 ecx, edi
            //   754c                 | dec                 eax
            //   b910010000           | add                 esp, 0x20
            //   ff15????????         |                     
            //   488b4c2478           | inc                 ecx

        $sequence_7 = { 458d41ff 0f1f4000 660f1f840000000000 0fb60a c1e604 488d5201 }
            // n = 6, score = 100
            //   458d41ff             | mov                 edi, eax
            //   0f1f4000             | dec                 ecx
            //   660f1f840000000000     | lea    ecx, [esi + 8]
            //   0fb60a               | inc                 ebp
            //   c1e604               | xor                 edi, edi
            //   488d5201             | dec                 eax

        $sequence_8 = { e8???????? eb05 e8???????? 84c0 7511 488d0ddd180000 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   eb05                 | dec                 eax
            //   e8????????           |                     
            //   84c0                 | inc                 ecx
            //   7511                 | dec                 eax
            //   488d0ddd180000       | arpl                dx, ax

        $sequence_9 = { 2bf0 488d2d192a0000 488bc5 397008 }
            // n = 4, score = 100
            //   2bf0                 | js                  0x10c
            //   488d2d192a0000       | dec                 eax
            //   488bc5               | lea                 eax, [esp + 0x80]
            //   397008               | inc                 ebp

    condition:
        7 of them and filesize < 65536
}