rule win_atmosphere_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.atmosphere."
        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.atmosphere"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 8b5104 8a0402 8b542404 8802 }
            // n = 4, score = 400
            //   8b5104               | mov                 edx, dword ptr [ecx + 4]
            //   8a0402               | mov                 al, byte ptr [edx + eax]
            //   8b542404             | mov                 edx, dword ptr [esp + 4]
            //   8802                 | mov                 byte ptr [edx], al

        $sequence_1 = { e8???????? 8b4604 85c0 7504 33f6 eb08 }
            // n = 6, score = 400
            //   e8????????           |                     
            //   8b4604               | mov                 eax, dword ptr [esi + 4]
            //   85c0                 | test                eax, eax
            //   7504                 | jne                 6
            //   33f6                 | xor                 esi, esi
            //   eb08                 | jmp                 0xa

        $sequence_2 = { 8bcc 8965e8 50 51 }
            // n = 4, score = 400
            //   8bcc                 | mov                 ecx, esp
            //   8965e8               | mov                 dword ptr [ebp - 0x18], esp
            //   50                   | push                eax
            //   51                   | push                ecx

        $sequence_3 = { 83ec10 8bc4 89642410 50 e8???????? }
            // n = 5, score = 400
            //   83ec10               | sub                 esp, 0x10
            //   8bc4                 | mov                 eax, esp
            //   89642410             | mov                 dword ptr [esp + 0x10], esp
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_4 = { ff15???????? 56 8bf8 ff15???????? 83c410 8bc7 5f }
            // n = 7, score = 400
            //   ff15????????         |                     
            //   56                   | push                esi
            //   8bf8                 | mov                 edi, eax
            //   ff15????????         |                     
            //   83c410               | add                 esp, 0x10
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi

        $sequence_5 = { 53 8bce 8975e8 8806 ff15???????? }
            // n = 5, score = 400
            //   53                   | push                ebx
            //   8bce                 | mov                 ecx, esi
            //   8975e8               | mov                 dword ptr [ebp - 0x18], esi
            //   8806                 | mov                 byte ptr [esi], al
            //   ff15????????         |                     

        $sequence_6 = { c645fc02 8bcc 8965e8 50 }
            // n = 4, score = 400
            //   c645fc02             | mov                 byte ptr [ebp - 4], 2
            //   8bcc                 | mov                 ecx, esp
            //   8965e8               | mov                 dword ptr [ebp - 0x18], esp
            //   50                   | push                eax

        $sequence_7 = { 53 56 57 8d45e0 8965f0 8bf1 50 }
            // n = 7, score = 400
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   8965f0               | mov                 dword ptr [ebp - 0x10], esp
            //   8bf1                 | mov                 esi, ecx
            //   50                   | push                eax

        $sequence_8 = { 83ec10 c645fc02 8bcc 8965e8 50 51 e8???????? }
            // n = 7, score = 400
            //   83ec10               | sub                 esp, 0x10
            //   c645fc02             | mov                 byte ptr [ebp - 4], 2
            //   8bcc                 | mov                 ecx, esp
            //   8965e8               | mov                 dword ptr [ebp - 0x18], esp
            //   50                   | push                eax
            //   51                   | push                ecx
            //   e8????????           |                     

        $sequence_9 = { 894114 b001 c20400 8b4114 }
            // n = 4, score = 400
            //   894114               | mov                 dword ptr [ecx + 0x14], eax
            //   b001                 | mov                 al, 1
            //   c20400               | ret                 4
            //   8b4114               | mov                 eax, dword ptr [ecx + 0x14]

    condition:
        7 of them and filesize < 360448
}