rule win_freenki_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.freenki."
        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.freenki"
        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 = { 0f84d3000000 8b048de4db4100 89859cf8ffff 85c0 0f8498000000 }
            // n = 5, score = 200
            //   0f84d3000000         | je                  0xd9
            //   8b048de4db4100       | mov                 eax, dword ptr [ecx*4 + 0x41dbe4]
            //   89859cf8ffff         | mov                 dword ptr [ebp - 0x764], eax
            //   85c0                 | test                eax, eax
            //   0f8498000000         | je                  0x9e

        $sequence_1 = { ff15???????? 898554ffffff 57 85c0 753b }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   898554ffffff         | mov                 dword ptr [ebp - 0xac], eax
            //   57                   | push                edi
            //   85c0                 | test                eax, eax
            //   753b                 | jne                 0x3d

        $sequence_2 = { 8b951cafffff 83c40c 8bce e8???????? }
            // n = 4, score = 200
            //   8b951cafffff         | mov                 edx, dword ptr [ebp - 0x50e4]
            //   83c40c               | add                 esp, 0xc
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     

        $sequence_3 = { 0f1f4000 0fb701 8d4902 6689440afe 6685c0 75f0 8d45c4 }
            // n = 7, score = 200
            //   0f1f4000             | nop                 dword ptr [eax]
            //   0fb701               | movzx               eax, word ptr [ecx]
            //   8d4902               | lea                 ecx, [ecx + 2]
            //   6689440afe           | mov                 word ptr [edx + ecx - 2], ax
            //   6685c0               | test                ax, ax
            //   75f0                 | jne                 0xfffffff2
            //   8d45c4               | lea                 eax, [ebp - 0x3c]

        $sequence_4 = { 50 e8???????? 6800100000 8d85f8ceffff 6a00 50 e8???????? }
            // n = 7, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   6800100000           | push                0x1000
            //   8d85f8ceffff         | lea                 eax, [ebp - 0x3108]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_5 = { e8???????? 8bf8 85ff 0f840c010000 8bb5f4fbffff }
            // n = 5, score = 200
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   85ff                 | test                edi, edi
            //   0f840c010000         | je                  0x112
            //   8bb5f4fbffff         | mov                 esi, dword ptr [ebp - 0x40c]

        $sequence_6 = { 85db 747c 53 56 }
            // n = 4, score = 200
            //   85db                 | test                ebx, ebx
            //   747c                 | je                  0x7e
            //   53                   | push                ebx
            //   56                   | push                esi

        $sequence_7 = { 83c020 3bc7 7cd4 5f 3bc2 7d11 8a0c30 }
            // n = 7, score = 200
            //   83c020               | add                 eax, 0x20
            //   3bc7                 | cmp                 eax, edi
            //   7cd4                 | jl                  0xffffffd6
            //   5f                   | pop                 edi
            //   3bc2                 | cmp                 eax, edx
            //   7d11                 | jge                 0x13
            //   8a0c30               | mov                 cl, byte ptr [eax + esi]

        $sequence_8 = { 8d5594 52 0f57c0 6a02 8b08 660f13854cffffff }
            // n = 6, score = 200
            //   8d5594               | lea                 edx, [ebp - 0x6c]
            //   52                   | push                edx
            //   0f57c0               | xorps               xmm0, xmm0
            //   6a02                 | push                2
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   660f13854cffffff     | movlpd              qword ptr [ebp - 0xb4], xmm0

        $sequence_9 = { 8d4dc0 c745fc01000000 e8???????? c645fc02 8b0e 85c9 7404 }
            // n = 7, score = 200
            //   8d4dc0               | lea                 ecx, [ebp - 0x40]
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1
            //   e8????????           |                     
            //   c645fc02             | mov                 byte ptr [ebp - 4], 2
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   85c9                 | test                ecx, ecx
            //   7404                 | je                  6

    condition:
        7 of them and filesize < 327680
}