rule win_funny_dream_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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???????? 6800100000 8d842454070000 6a00 }
            // n = 4, score = 300
            //   ff15????????         |                     
            //   6800100000           | push                0x1000
            //   8d842454070000       | lea                 eax, dword ptr [esp + 0x754]
            //   6a00                 | push                0

        $sequence_1 = { 7447 83fe01 751f 8b85d4feffff be03000000 8985adfeffff 8b85d8feffff }
            // n = 7, score = 300
            //   7447                 | je                  0x49
            //   83fe01               | cmp                 esi, 1
            //   751f                 | jne                 0x21
            //   8b85d4feffff         | mov                 eax, dword ptr [ebp - 0x12c]
            //   be03000000           | mov                 esi, 3
            //   8985adfeffff         | mov                 dword ptr [ebp - 0x153], eax
            //   8b85d8feffff         | mov                 eax, dword ptr [ebp - 0x128]

        $sequence_2 = { ffd6 ff7708 c707???????? ffd6 }
            // n = 4, score = 300
            //   ffd6                 | call                esi
            //   ff7708               | push                dword ptr [edi + 8]
            //   c707????????         |                     
            //   ffd6                 | call                esi

        $sequence_3 = { 50 6802020000 c787c400000000000000 c787cc00000000000000 ff15???????? 6a00 6a00 }
            // n = 7, score = 300
            //   50                   | push                eax
            //   6802020000           | push                0x202
            //   c787c400000000000000     | mov    dword ptr [edi + 0xc4], 0
            //   c787cc00000000000000     | mov    dword ptr [edi + 0xcc], 0
            //   ff15????????         |                     
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_4 = { 57 8b7d08 85f6 7513 5f }
            // n = 5, score = 300
            //   57                   | push                edi
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   85f6                 | test                esi, esi
            //   7513                 | jne                 0x15
            //   5f                   | pop                 edi

        $sequence_5 = { 8945fc 83f8ff 750b 0bc0 5f }
            // n = 5, score = 300
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   83f8ff               | cmp                 eax, -1
            //   750b                 | jne                 0xd
            //   0bc0                 | or                  eax, eax
            //   5f                   | pop                 edi

        $sequence_6 = { 50 6a01 8d85fcfdffff 50 ff7614 }
            // n = 5, score = 300
            //   50                   | push                eax
            //   6a01                 | push                1
            //   8d85fcfdffff         | lea                 eax, dword ptr [ebp - 0x204]
            //   50                   | push                eax
            //   ff7614               | push                dword ptr [esi + 0x14]

        $sequence_7 = { 50 ffd7 e9???????? 6a00 8d85bcfeffff 50 8d4618 }
            // n = 7, score = 300
            //   50                   | push                eax
            //   ffd7                 | call                edi
            //   e9????????           |                     
            //   6a00                 | push                0
            //   8d85bcfeffff         | lea                 eax, dword ptr [ebp - 0x144]
            //   50                   | push                eax
            //   8d4618               | lea                 eax, dword ptr [esi + 0x18]

        $sequence_8 = { 8d45f0 66c745f42e2a 50 8d85e4feffff c645f600 }
            // n = 5, score = 300
            //   8d45f0               | lea                 eax, dword ptr [ebp - 0x10]
            //   66c745f42e2a         | mov                 word ptr [ebp - 0xc], 0x2a2e
            //   50                   | push                eax
            //   8d85e4feffff         | lea                 eax, dword ptr [ebp - 0x11c]
            //   c645f600             | mov                 byte ptr [ebp - 0xa], 0

        $sequence_9 = { 83c404 8b4f04 85c9 7504 33c0 eb05 8b4708 }
            // n = 7, score = 300
            //   83c404               | add                 esp, 4
            //   8b4f04               | mov                 ecx, dword ptr [edi + 4]
            //   85c9                 | test                ecx, ecx
            //   7504                 | jne                 6
            //   33c0                 | xor                 eax, eax
            //   eb05                 | jmp                 7
            //   8b4708               | mov                 eax, dword ptr [edi + 8]

    condition:
        7 of them and filesize < 393216
}