rule win_funny_dream_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.funny_dream."
        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.funny_dream"
        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 = { 56 ffd0 6a05 6a40 b371 ff15???????? 8bf0 }
            // n = 7, score = 300
            //   56                   | push                esi
            //   ffd0                 | call                eax
            //   6a05                 | push                5
            //   6a40                 | push                0x40
            //   b371                 | mov                 bl, 0x71
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax

        $sequence_1 = { 83c404 8bde 3b7714 75e6 8b4714 }
            // n = 5, score = 300
            //   83c404               | add                 esp, 4
            //   8bde                 | mov                 ebx, esi
            //   3b7714               | cmp                 esi, dword ptr [edi + 0x14]
            //   75e6                 | jne                 0xffffffe8
            //   8b4714               | mov                 eax, dword ptr [edi + 0x14]

        $sequence_2 = { ffd7 8b1d???????? 6896000000 ffd3 }
            // n = 4, score = 300
            //   ffd7                 | call                edi
            //   8b1d????????         |                     
            //   6896000000           | push                0x96
            //   ffd3                 | call                ebx

        $sequence_3 = { 7f19 6a00 6800020000 ff75fc ff75f8 ff15???????? 8bf0 }
            // n = 7, score = 300
            //   7f19                 | jg                  0x1b
            //   6a00                 | push                0
            //   6800020000           | push                0x200
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax

        $sequence_4 = { 50 e8???????? 6800010000 8d85bcfeffff c785a8feffff40000000 }
            // n = 5, score = 300
            //   50                   | push                eax
            //   e8????????           |                     
            //   6800010000           | push                0x100
            //   8d85bcfeffff         | lea                 eax, [ebp - 0x144]
            //   c785a8feffff40000000     | mov    dword ptr [ebp - 0x158], 0x40

        $sequence_5 = { 8d45e4 50 33f6 c745e45368656c c745e86c33322e c745ec646c6c00 }
            // n = 6, score = 300
            //   8d45e4               | lea                 eax, [ebp - 0x1c]
            //   50                   | push                eax
            //   33f6                 | xor                 esi, esi
            //   c745e45368656c       | mov                 dword ptr [ebp - 0x1c], 0x6c656853
            //   c745e86c33322e       | mov                 dword ptr [ebp - 0x18], 0x2e32336c
            //   c745ec646c6c00       | mov                 dword ptr [ebp - 0x14], 0x6c6c64

        $sequence_6 = { c785bcfdffff01000000 668985c0fdffff 83c40c 8d85f8feffff c745dc6b65726e 898598fdffff }
            // n = 6, score = 300
            //   c785bcfdffff01000000     | mov    dword ptr [ebp - 0x244], 1
            //   668985c0fdffff       | mov                 word ptr [ebp - 0x240], ax
            //   83c40c               | add                 esp, 0xc
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]
            //   c745dc6b65726e       | mov                 dword ptr [ebp - 0x24], 0x6e72656b
            //   898598fdffff         | mov                 dword ptr [ebp - 0x268], eax

        $sequence_7 = { 8b4c2420 83c006 89442414 83ff0f 7c9f }
            // n = 5, score = 300
            //   8b4c2420             | mov                 ecx, dword ptr [esp + 0x20]
            //   83c006               | add                 eax, 6
            //   89442414             | mov                 dword ptr [esp + 0x14], eax
            //   83ff0f               | cmp                 edi, 0xf
            //   7c9f                 | jl                  0xffffffa1

        $sequence_8 = { 50 ffd7 8b4620 85c0 0f84b0010000 50 ffd7 }
            // n = 7, score = 300
            //   50                   | push                eax
            //   ffd7                 | call                edi
            //   8b4620               | mov                 eax, dword ptr [esi + 0x20]
            //   85c0                 | test                eax, eax
            //   0f84b0010000         | je                  0x1b6
            //   50                   | push                eax
            //   ffd7                 | call                edi

        $sequence_9 = { 8b85c4fdffff 89441f05 8b85b8fdffff 89441f09 8b85bcfdffff 89441f0d 83c711 }
            // n = 7, score = 300
            //   8b85c4fdffff         | mov                 eax, dword ptr [ebp - 0x23c]
            //   89441f05             | mov                 dword ptr [edi + ebx + 5], eax
            //   8b85b8fdffff         | mov                 eax, dword ptr [ebp - 0x248]
            //   89441f09             | mov                 dword ptr [edi + ebx + 9], eax
            //   8b85bcfdffff         | mov                 eax, dword ptr [ebp - 0x244]
            //   89441f0d             | mov                 dword ptr [edi + ebx + 0xd], eax
            //   83c711               | add                 edi, 0x11

    condition:
        7 of them and filesize < 393216
}