rule win_satana_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.satana."
        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.satana"
        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 = { 52 ffd7 8b35???????? ba???????? }
            // n = 4, score = 100
            //   52                   | push                edx
            //   ffd7                 | call                edi
            //   8b35????????         |                     
            //   ba????????           |                     

        $sequence_1 = { 52 50 ff15???????? 8bc6 8d7801 8a08 40 }
            // n = 7, score = 100
            //   52                   | push                edx
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bc6                 | mov                 eax, esi
            //   8d7801               | lea                 edi, [eax + 1]
            //   8a08                 | mov                 cl, byte ptr [eax]
            //   40                   | inc                 eax

        $sequence_2 = { bfff000000 f7ff 8a8258fd4000 8845fd eb04 c645fd00 84db }
            // n = 7, score = 100
            //   bfff000000           | mov                 edi, 0xff
            //   f7ff                 | idiv                edi
            //   8a8258fd4000         | mov                 al, byte ptr [edx + 0x40fd58]
            //   8845fd               | mov                 byte ptr [ebp - 3], al
            //   eb04                 | jmp                 6
            //   c645fd00             | mov                 byte ptr [ebp - 3], 0
            //   84db                 | test                bl, bl

        $sequence_3 = { ff15???????? 8b75dc 8975bc 8b5de0 895dc0 }
            // n = 5, score = 100
            //   ff15????????         |                     
            //   8b75dc               | mov                 esi, dword ptr [ebp - 0x24]
            //   8975bc               | mov                 dword ptr [ebp - 0x44], esi
            //   8b5de0               | mov                 ebx, dword ptr [ebp - 0x20]
            //   895dc0               | mov                 dword ptr [ebp - 0x40], ebx

        $sequence_4 = { 56 6a08 50 ff15???????? 8bce a3???????? 85c9 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   6a08                 | push                8
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bce                 | mov                 ecx, esi
            //   a3????????           |                     
            //   85c9                 | test                ecx, ecx

        $sequence_5 = { 68???????? eb47 68???????? e8???????? 83c404 }
            // n = 5, score = 100
            //   68????????           |                     
            //   eb47                 | jmp                 0x49
            //   68????????           |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_6 = { 668b0f 83c702 6685c9 75f5 66390f 75ad e9???????? }
            // n = 7, score = 100
            //   668b0f               | mov                 cx, word ptr [edi]
            //   83c702               | add                 edi, 2
            //   6685c9               | test                cx, cx
            //   75f5                 | jne                 0xfffffff7
            //   66390f               | cmp                 word ptr [edi], cx
            //   75ad                 | jne                 0xffffffaf
            //   e9????????           |                     

        $sequence_7 = { 33c9 8b45e4 ba02000000 f7e2 0f90c1 f7d9 }
            // n = 6, score = 100
            //   33c9                 | xor                 ecx, ecx
            //   8b45e4               | mov                 eax, dword ptr [ebp - 0x1c]
            //   ba02000000           | mov                 edx, 2
            //   f7e2                 | mul                 edx
            //   0f90c1               | seto                cl
            //   f7d9                 | neg                 ecx

        $sequence_8 = { e8???????? 8b45fc 8b35???????? 6a30 68???????? 6a01 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8b35????????         |                     
            //   6a30                 | push                0x30
            //   68????????           |                     
            //   6a01                 | push                1

        $sequence_9 = { 0fb688a83f4100 0fb65602 884e01 0fb682a83f4100 0fb64e03 884602 0fb691a83f4100 }
            // n = 7, score = 100
            //   0fb688a83f4100       | movzx               ecx, byte ptr [eax + 0x413fa8]
            //   0fb65602             | movzx               edx, byte ptr [esi + 2]
            //   884e01               | mov                 byte ptr [esi + 1], cl
            //   0fb682a83f4100       | movzx               eax, byte ptr [edx + 0x413fa8]
            //   0fb64e03             | movzx               ecx, byte ptr [esi + 3]
            //   884602               | mov                 byte ptr [esi + 2], al
            //   0fb691a83f4100       | movzx               edx, byte ptr [ecx + 0x413fa8]

    condition:
        7 of them and filesize < 221184
}