rule win_funny_dream_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "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 = { ff15???????? 8bd8 c745f025735c2a 56 8d45f0 }
            // n = 5, score = 300
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax
            //   c745f025735c2a       | mov                 dword ptr [ebp - 0x10], 0x2a5c7325
            //   56                   | push                esi
            //   8d45f0               | lea                 eax, [ebp - 0x10]

        $sequence_1 = { 50 6a00 6a00 6a00 ffb5b4feffff ff15???????? 6a40 }
            // n = 7, score = 300
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   ffb5b4feffff         | push                dword ptr [ebp - 0x14c]
            //   ff15????????         |                     
            //   6a40                 | push                0x40

        $sequence_2 = { 57 8945f8 8bf9 8b02 68???????? c745fc00000000 894508 }
            // n = 7, score = 300
            //   57                   | push                edi
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8bf9                 | mov                 edi, ecx
            //   8b02                 | mov                 eax, dword ptr [edx]
            //   68????????           |                     
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   894508               | mov                 dword ptr [ebp + 8], eax

        $sequence_3 = { e8???????? 8be5 5d c20800 0f57c0 c744244a00000000 b802000000 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20800               | ret                 8
            //   0f57c0               | xorps               xmm0, xmm0
            //   c744244a00000000     | mov                 dword ptr [esp + 0x4a], 0
            //   b802000000           | mov                 eax, 2

        $sequence_4 = { 7736 b902000000 66890f 8b400c 8b00 }
            // n = 5, score = 300
            //   7736                 | ja                  0x38
            //   b902000000           | mov                 ecx, 2
            //   66890f               | mov                 word ptr [edi], cx
            //   8b400c               | mov                 eax, dword ptr [eax + 0xc]
            //   8b00                 | mov                 eax, dword ptr [eax]

        $sequence_5 = { 8a02 42 84c0 75f9 8dbdb4fdffff 2bd6 }
            // n = 6, score = 300
            //   8a02                 | mov                 al, byte ptr [edx]
            //   42                   | inc                 edx
            //   84c0                 | test                al, al
            //   75f9                 | jne                 0xfffffffb
            //   8dbdb4fdffff         | lea                 edi, [ebp - 0x24c]
            //   2bd6                 | sub                 edx, esi

        $sequence_6 = { 53 56 8b35???????? 57 68???????? c745d800000000 c745d004000000 }
            // n = 7, score = 300
            //   53                   | push                ebx
            //   56                   | push                esi
            //   8b35????????         |                     
            //   57                   | push                edi
            //   68????????           |                     
            //   c745d800000000       | mov                 dword ptr [ebp - 0x28], 0
            //   c745d004000000       | mov                 dword ptr [ebp - 0x30], 4

        $sequence_7 = { 6a78 8d8500ffffff c685effdffff00 6a00 50 8bf1 c785f8feffff74657374 }
            // n = 7, score = 300
            //   6a78                 | push                0x78
            //   8d8500ffffff         | lea                 eax, [ebp - 0x100]
            //   c685effdffff00       | mov                 byte ptr [ebp - 0x211], 0
            //   6a00                 | push                0
            //   50                   | push                eax
            //   8bf1                 | mov                 esi, ecx
            //   c785f8feffff74657374     | mov    dword ptr [ebp - 0x108], 0x74736574

        $sequence_8 = { 53 8a4810 8d4602 50 884e01 e8???????? 8b4508 }
            // n = 7, score = 300
            //   53                   | push                ebx
            //   8a4810               | mov                 cl, byte ptr [eax + 0x10]
            //   8d4602               | lea                 eax, [esi + 2]
            //   50                   | push                eax
            //   884e01               | mov                 byte ptr [esi + 1], cl
            //   e8????????           |                     
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_9 = { 8d85c2fdffff c785b4fdffff2f632072 6a00 50 c785b8fdffff6d646972 c785bcfdffff202f7320 66c785c0fdffff2f71 }
            // n = 7, score = 300
            //   8d85c2fdffff         | lea                 eax, [ebp - 0x23e]
            //   c785b4fdffff2f632072     | mov    dword ptr [ebp - 0x24c], 0x7220632f
            //   6a00                 | push                0
            //   50                   | push                eax
            //   c785b8fdffff6d646972     | mov    dword ptr [ebp - 0x248], 0x7269646d
            //   c785bcfdffff202f7320     | mov    dword ptr [ebp - 0x244], 0x20732f20
            //   66c785c0fdffff2f71     | mov    word ptr [ebp - 0x240], 0x712f

    condition:
        7 of them and filesize < 393216
}