rule win_dyepack_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.dyepack."
        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.dyepack"
        malpedia_rule_date = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 2bcd 1bc7 7815 7f08 }
            // n = 4, score = 300
            //   2bcd                 | sub                 ecx, ebp
            //   1bc7                 | sbb                 eax, edi
            //   7815                 | js                  0x17
            //   7f08                 | jg                  0xa

        $sequence_1 = { 03e8 8b442414 13fb 3bf8 }
            // n = 4, score = 300
            //   03e8                 | add                 ebp, eax
            //   8b442414             | mov                 eax, dword ptr [esp + 0x14]
            //   13fb                 | adc                 edi, ebx
            //   3bf8                 | cmp                 edi, eax

        $sequence_2 = { 53 6800000040 50 ff15???????? 8bf0 83feff 7510 }
            // n = 7, score = 300
            //   53                   | push                ebx
            //   6800000040           | push                0x40000000
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   83feff               | cmp                 esi, -1
            //   7510                 | jne                 0x12

        $sequence_3 = { 3bf8 7cb2 7f08 8b4c2410 }
            // n = 4, score = 300
            //   3bf8                 | cmp                 edi, eax
            //   7cb2                 | jl                  0xffffffb4
            //   7f08                 | jg                  0xa
            //   8b4c2410             | mov                 ecx, dword ptr [esp + 0x10]

        $sequence_4 = { ff15???????? 8d442410 895c2410 50 56 895c241c }
            // n = 6, score = 300
            //   ff15????????         |                     
            //   8d442410             | lea                 eax, dword ptr [esp + 0x10]
            //   895c2410             | mov                 dword ptr [esp + 0x10], ebx
            //   50                   | push                eax
            //   56                   | push                esi
            //   895c241c             | mov                 dword ptr [esp + 0x1c], ebx

        $sequence_5 = { aa 8b842434100000 53 6800000040 }
            // n = 4, score = 300
            //   aa                   | stosb               byte ptr es:[edi], al
            //   8b842434100000       | mov                 eax, dword ptr [esp + 0x1034]
            //   53                   | push                ebx
            //   6800000040           | push                0x40000000

        $sequence_6 = { 8b4c2410 33ed 33ff 3bc3 7c60 }
            // n = 5, score = 300
            //   8b4c2410             | mov                 ecx, dword ptr [esp + 0x10]
            //   33ed                 | xor                 ebp, ebp
            //   33ff                 | xor                 edi, edi
            //   3bc3                 | cmp                 eax, ebx
            //   7c60                 | jl                  0x62

        $sequence_7 = { 56 ff15???????? 56 ff15???????? 8d442410 895c2410 }
            // n = 6, score = 300
            //   56                   | push                esi
            //   ff15????????         |                     
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8d442410             | lea                 eax, dword ptr [esp + 0x10]
            //   895c2410             | mov                 dword ptr [esp + 0x10], ebx

        $sequence_8 = { 85c0 741e 8b442418 3bc3 7416 03e8 8b442414 }
            // n = 7, score = 300
            //   85c0                 | test                eax, eax
            //   741e                 | je                  0x20
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   3bc3                 | cmp                 eax, ebx
            //   7416                 | je                  0x18
            //   03e8                 | add                 ebp, eax
            //   8b442414             | mov                 eax, dword ptr [esp + 0x14]

        $sequence_9 = { 8d7c2421 885c2420 f3ab 66ab 53 6880000000 }
            // n = 6, score = 300
            //   8d7c2421             | lea                 edi, dword ptr [esp + 0x21]
            //   885c2420             | mov                 byte ptr [esp + 0x20], bl
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   53                   | push                ebx
            //   6880000000           | push                0x80

    condition:
        7 of them and filesize < 212992
}