rule win_mykings_spreader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.mykings_spreader."
        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.mykings_spreader"
        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 = { c785ecfdffff00000000 8d85e0fdffff e8???????? c785e0fdffff00000000 8b45f8 83c01b 8d95e0fdffff }
            // n = 7, score = 100
            //   c785ecfdffff00000000     | mov    dword ptr [ebp - 0x214], 0
            //   8d85e0fdffff         | lea                 eax, [ebp - 0x220]
            //   e8????????           |                     
            //   c785e0fdffff00000000     | mov    dword ptr [ebp - 0x220], 0
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   83c01b               | add                 eax, 0x1b
            //   8d95e0fdffff         | lea                 edx, [ebp - 0x220]

        $sequence_1 = { 85d2 7505 ba???????? 8b45f8 8b00 85c0 7505 }
            // n = 7, score = 100
            //   85d2                 | test                edx, edx
            //   7505                 | jne                 7
            //   ba????????           |                     
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   85c0                 | test                eax, eax
            //   7505                 | jne                 7

        $sequence_2 = { 89da 8b0424 e8???????? 85c0 7506 89742408 eb07 }
            // n = 7, score = 100
            //   89da                 | mov                 edx, ebx
            //   8b0424               | mov                 eax, dword ptr [esp]
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7506                 | jne                 8
            //   89742408             | mov                 dword ptr [esp + 8], esi
            //   eb07                 | jmp                 9

        $sequence_3 = { 89d0 8b12 ff5278 e9???????? 8d4da4 }
            // n = 5, score = 100
            //   89d0                 | mov                 eax, edx
            //   8b12                 | mov                 edx, dword ptr [edx]
            //   ff5278               | call                dword ptr [edx + 0x78]
            //   e9????????           |                     
            //   8d4da4               | lea                 ecx, [ebp - 0x5c]

        $sequence_4 = { e9???????? 8b5604 01da 8b02 89442414 8b4204 89442410 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8b5604               | mov                 edx, dword ptr [esi + 4]
            //   01da                 | add                 edx, ebx
            //   8b02                 | mov                 eax, dword ptr [edx]
            //   89442414             | mov                 dword ptr [esp + 0x14], eax
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   89442410             | mov                 dword ptr [esp + 0x10], eax

        $sequence_5 = { 81e6f0ff0000 39d0 7548 ff4f10 89f2 c1ea04 8b4c9008 }
            // n = 7, score = 100
            //   81e6f0ff0000         | and                 esi, 0xfff0
            //   39d0                 | cmp                 eax, edx
            //   7548                 | jne                 0x4a
            //   ff4f10               | dec                 dword ptr [edi + 0x10]
            //   89f2                 | mov                 edx, esi
            //   c1ea04               | shr                 edx, 4
            //   8b4c9008             | mov                 ecx, dword ptr [eax + edx*4 + 8]

        $sequence_6 = { 7577 8d4c2418 689b000000 51 ff15???????? 85c0 755d }
            // n = 7, score = 100
            //   7577                 | jne                 0x79
            //   8d4c2418             | lea                 ecx, [esp + 0x18]
            //   689b000000           | push                0x9b
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   755d                 | jne                 0x5f

        $sequence_7 = { a1???????? 85c0 740b ff35???????? e8???????? ba???????? b8???????? }
            // n = 7, score = 100
            //   a1????????           |                     
            //   85c0                 | test                eax, eax
            //   740b                 | je                  0xd
            //   ff35????????         |                     
            //   e8????????           |                     
            //   ba????????           |                     
            //   b8????????           |                     

        $sequence_8 = { 51 33ff e8???????? 8bd0 83c408 85d2 7452 }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   33ff                 | xor                 edi, edi
            //   e8????????           |                     
            //   8bd0                 | mov                 edx, eax
            //   83c408               | add                 esp, 8
            //   85d2                 | test                edx, edx
            //   7452                 | je                  0x54

        $sequence_9 = { 90 7400 e9???????? 90 50 53 5b }
            // n = 7, score = 100
            //   90                   | nop                 
            //   7400                 | je                  2
            //   e9????????           |                     
            //   90                   | nop                 
            //   50                   | push                eax
            //   53                   | push                ebx
            //   5b                   | pop                 ebx

    condition:
        7 of them and filesize < 1581056
}