rule win_onionduke_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.onionduke."
        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.onionduke"
        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 = { 51 e8???????? 83c404 837b3408 8d4320 }
            // n = 5, score = 200
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   837b3408             | cmp                 dword ptr [ebx + 0x34], 8
            //   8d4320               | lea                 eax, [ebx + 0x20]

        $sequence_1 = { 83c404 8901 3933 7668 8d4900 8a0477 }
            // n = 6, score = 200
            //   83c404               | add                 esp, 4
            //   8901                 | mov                 dword ptr [ecx], eax
            //   3933                 | cmp                 dword ptr [ebx], esi
            //   7668                 | jbe                 0x6a
            //   8d4900               | lea                 ecx, [ecx]
            //   8a0477               | mov                 al, byte ptr [edi + esi*2]

        $sequence_2 = { 7202 8b00 8b4d08 8a10 3a11 751a }
            // n = 6, score = 200
            //   7202                 | jb                  4
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8a10                 | mov                 dl, byte ptr [eax]
            //   3a11                 | cmp                 dl, byte ptr [ecx]
            //   751a                 | jne                 0x1c

        $sequence_3 = { ebc4 8a0e 8bc6 84c9 7421 8b55fc }
            // n = 6, score = 200
            //   ebc4                 | jmp                 0xffffffc6
            //   8a0e                 | mov                 cl, byte ptr [esi]
            //   8bc6                 | mov                 eax, esi
            //   84c9                 | test                cl, cl
            //   7421                 | je                  0x23
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]

        $sequence_4 = { 8b7510 50 8d45d4 50 e8???????? }
            // n = 5, score = 200
            //   8b7510               | mov                 esi, dword ptr [ebp + 0x10]
            //   50                   | push                eax
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_5 = { 75fb 83c00c 83781410 7202 8b00 8d5001 8a08 }
            // n = 7, score = 200
            //   75fb                 | jne                 0xfffffffd
            //   83c00c               | add                 eax, 0xc
            //   83781410             | cmp                 dword ptr [eax + 0x14], 0x10
            //   7202                 | jb                  4
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8d5001               | lea                 edx, [eax + 1]
            //   8a08                 | mov                 cl, byte ptr [eax]

        $sequence_6 = { 83c638 89450c 83c738 e9???????? 8b4df4 64890d00000000 }
            // n = 6, score = 200
            //   83c638               | add                 esi, 0x38
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax
            //   83c738               | add                 edi, 0x38
            //   e9????????           |                     
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   64890d00000000       | mov                 dword ptr fs:[0], ecx

        $sequence_7 = { 8be5 5d c21000 8b5514 8b4b04 8b01 }
            // n = 6, score = 200
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c21000               | ret                 0x10
            //   8b5514               | mov                 edx, dword ptr [ebp + 0x14]
            //   8b4b04               | mov                 ecx, dword ptr [ebx + 4]
            //   8b01                 | mov                 eax, dword ptr [ecx]

        $sequence_8 = { 8b4dfc 33cd e8???????? 8be5 5d c20400 837df408 }
            // n = 7, score = 200
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   33cd                 | xor                 ecx, ebp
            //   e8????????           |                     
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20400               | ret                 4
            //   837df408             | cmp                 dword ptr [ebp - 0xc], 8

        $sequence_9 = { 3bf0 7414 8b7d10 c746140f000000 }
            // n = 4, score = 200
            //   3bf0                 | cmp                 esi, eax
            //   7414                 | je                  0x16
            //   8b7d10               | mov                 edi, dword ptr [ebp + 0x10]
            //   c746140f000000       | mov                 dword ptr [esi + 0x14], 0xf

    condition:
        7 of them and filesize < 671744
}