rule win_auriga_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.auriga."
        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.auriga"
        malpedia_rule_date = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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???????? 83c40c 85c0 756e 8d45c4 50 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   756e                 | jne                 0x70
            //   8d45c4               | lea                 eax, dword ptr [ebp - 0x3c]
            //   50                   | push                eax

        $sequence_1 = { 733f 2bd7 89550c ff4d0c 8d5114 }
            // n = 5, score = 100
            //   733f                 | jae                 0x41
            //   2bd7                 | sub                 edx, edi
            //   89550c               | mov                 dword ptr [ebp + 0xc], edx
            //   ff4d0c               | dec                 dword ptr [ebp + 0xc]
            //   8d5114               | lea                 edx, dword ptr [ecx + 0x14]

        $sequence_2 = { 8a4603 2440 3c40 0f94c0 884708 }
            // n = 5, score = 100
            //   8a4603               | mov                 al, byte ptr [esi + 3]
            //   2440                 | and                 al, 0x40
            //   3c40                 | cmp                 al, 0x40
            //   0f94c0               | sete                al
            //   884708               | mov                 byte ptr [edi + 8], al

        $sequence_3 = { 898a60ffffff 6a23 8d720c 8dba64ffffff 59 03d3 ff4df0 }
            // n = 7, score = 100
            //   898a60ffffff         | mov                 dword ptr [edx - 0xa0], ecx
            //   6a23                 | push                0x23
            //   8d720c               | lea                 esi, dword ptr [edx + 0xc]
            //   8dba64ffffff         | lea                 edi, dword ptr [edx - 0x9c]
            //   59                   | pop                 ecx
            //   03d3                 | add                 edx, ebx
            //   ff4df0               | dec                 dword ptr [ebp - 0x10]

        $sequence_4 = { c705????????58000000 c705????????3e000000 c705????????a0010000 eb48 837df406 7542 }
            // n = 6, score = 100
            //   c705????????58000000     |     
            //   c705????????3e000000     |     
            //   c705????????a0010000     |     
            //   eb48                 | jmp                 0x4a
            //   837df406             | cmp                 dword ptr [ebp - 0xc], 6
            //   7542                 | jne                 0x44

        $sequence_5 = { 50 51 ff15???????? 8bf0 897510 3bf3 }
            // n = 6, score = 100
            //   50                   | push                eax
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   897510               | mov                 dword ptr [ebp + 0x10], esi
            //   3bf3                 | cmp                 esi, ebx

        $sequence_6 = { 7407 b8010000c0 eb51 833d????????00 74f0 56 }
            // n = 6, score = 100
            //   7407                 | je                  9
            //   b8010000c0           | mov                 eax, 0xc0000001
            //   eb51                 | jmp                 0x53
            //   833d????????00       |                     
            //   74f0                 | je                  0xfffffff2
            //   56                   | push                esi

        $sequence_7 = { 68???????? 6a01 8d45dc 50 }
            // n = 4, score = 100
            //   68????????           |                     
            //   6a01                 | push                1
            //   8d45dc               | lea                 eax, dword ptr [ebp - 0x24]
            //   50                   | push                eax

        $sequence_8 = { 6aff 56 50 688e4e0eec }
            // n = 4, score = 100
            //   6aff                 | push                -1
            //   56                   | push                esi
            //   50                   | push                eax
            //   688e4e0eec           | push                0xec0e4e8e

        $sequence_9 = { 8b3c30 ff45ec eba1 8bc6 eb02 }
            // n = 5, score = 100
            //   8b3c30               | mov                 edi, dword ptr [eax + esi]
            //   ff45ec               | inc                 dword ptr [ebp - 0x14]
            //   eba1                 | jmp                 0xffffffa3
            //   8bc6                 | mov                 eax, esi
            //   eb02                 | jmp                 4

    condition:
        7 of them and filesize < 75776
}