rule win_makloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.makloader."
        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.makloader"
        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 = { 52 0fb685f6e5ffff 50 68???????? 8d8dfce9ffff }
            // n = 5, score = 200
            //   52                   | push                edx
            //   0fb685f6e5ffff       | movzx               eax, byte ptr [ebp - 0x1a0a]
            //   50                   | push                eax
            //   68????????           |                     
            //   8d8dfce9ffff         | lea                 ecx, [ebp - 0x1604]

        $sequence_1 = { ebc6 c745e0881c4200 e9???????? c745e0901c4200 }
            // n = 4, score = 200
            //   ebc6                 | jmp                 0xffffffc8
            //   c745e0881c4200       | mov                 dword ptr [ebp - 0x20], 0x421c88
            //   e9????????           |                     
            //   c745e0901c4200       | mov                 dword ptr [ebp - 0x20], 0x421c90

        $sequence_2 = { e8???????? 8b4dfc 884108 ba01000000 }
            // n = 4, score = 200
            //   e8????????           |                     
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   884108               | mov                 byte ptr [ecx + 8], al
            //   ba01000000           | mov                 edx, 1

        $sequence_3 = { 56 57 8955d0 8b048d885d4200 }
            // n = 4, score = 200
            //   56                   | push                esi
            //   57                   | push                edi
            //   8955d0               | mov                 dword ptr [ebp - 0x30], edx
            //   8b048d885d4200       | mov                 eax, dword ptr [ecx*4 + 0x425d88]

        $sequence_4 = { 32c0 e9???????? 8b450c 8945e0 8b4d0c 83e901 894d0c }
            // n = 7, score = 200
            //   32c0                 | xor                 al, al
            //   e9????????           |                     
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   83e901               | sub                 ecx, 1
            //   894d0c               | mov                 dword ptr [ebp + 0xc], ecx

        $sequence_5 = { 6bc000 c780dc57420002000000 6a04 58 6bc000 8b0d???????? 894c05f8 }
            // n = 7, score = 200
            //   6bc000               | imul                eax, eax, 0
            //   c780dc57420002000000     | mov    dword ptr [eax + 0x4257dc], 2
            //   6a04                 | push                4
            //   58                   | pop                 eax
            //   6bc000               | imul                eax, eax, 0
            //   8b0d????????         |                     
            //   894c05f8             | mov                 dword ptr [ebp + eax - 8], ecx

        $sequence_6 = { 8b8d34fdffff 0fb644c103 99 b120 e8???????? 0bf0 0bfa }
            // n = 7, score = 200
            //   8b8d34fdffff         | mov                 ecx, dword ptr [ebp - 0x2cc]
            //   0fb644c103           | movzx               eax, byte ptr [ecx + eax*8 + 3]
            //   99                   | cdq                 
            //   b120                 | mov                 cl, 0x20
            //   e8????????           |                     
            //   0bf0                 | or                  esi, eax
            //   0bfa                 | or                  edi, edx

        $sequence_7 = { 51 6a03 68???????? e8???????? }
            // n = 4, score = 200
            //   51                   | push                ecx
            //   6a03                 | push                3
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_8 = { 894415c0 b908000000 c1e100 ba08000000 d1e2 }
            // n = 5, score = 200
            //   894415c0             | mov                 dword ptr [ebp + edx - 0x40], eax
            //   b908000000           | mov                 ecx, 8
            //   c1e100               | shl                 ecx, 0
            //   ba08000000           | mov                 edx, 8
            //   d1e2                 | shl                 edx, 1

        $sequence_9 = { 80bd64e6ffff00 75e1 8bbd0ce6ffff 8bb564e5ffff 8b8560e5ffff 8bc8 }
            // n = 6, score = 200
            //   80bd64e6ffff00       | cmp                 byte ptr [ebp - 0x199c], 0
            //   75e1                 | jne                 0xffffffe3
            //   8bbd0ce6ffff         | mov                 edi, dword ptr [ebp - 0x19f4]
            //   8bb564e5ffff         | mov                 esi, dword ptr [ebp - 0x1a9c]
            //   8b8560e5ffff         | mov                 eax, dword ptr [ebp - 0x1aa0]
            //   8bc8                 | mov                 ecx, eax

    condition:
        7 of them and filesize < 335872
}