rule win_auriga_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "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 = { 8bfb 8b4508 8d5001 8a08 }
            // n = 4, score = 100
            //   8bfb                 | mov                 edi, ebx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8d5001               | lea                 edx, [eax + 1]
            //   8a08                 | mov                 cl, byte ptr [eax]

        $sequence_1 = { 50 ff15???????? ff7604 ff15???????? 33c0 5e }
            // n = 6, score = 100
            //   50                   | push                eax
            //   ff15????????         |                     
            //   ff7604               | push                dword ptr [esi + 4]
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   5e                   | pop                 esi

        $sequence_2 = { 53 53 6a40 50 ff15???????? }
            // n = 5, score = 100
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   6a40                 | push                0x40
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_3 = { 836dfc38 836df438 836df00c 83c418 4b }
            // n = 5, score = 100
            //   836dfc38             | sub                 dword ptr [ebp - 4], 0x38
            //   836df438             | sub                 dword ptr [ebp - 0xc], 0x38
            //   836df00c             | sub                 dword ptr [ebp - 0x10], 0xc
            //   83c418               | add                 esp, 0x18
            //   4b                   | dec                 ebx

        $sequence_4 = { 50 be00ca9a3b 33ff ff15???????? 53 6888130000 }
            // n = 6, score = 100
            //   50                   | push                eax
            //   be00ca9a3b           | mov                 esi, 0x3b9aca00
            //   33ff                 | xor                 edi, edi
            //   ff15????????         |                     
            //   53                   | push                ebx
            //   6888130000           | push                0x1388

        $sequence_5 = { 8b500c 57 8b7e0c 752a }
            // n = 4, score = 100
            //   8b500c               | mov                 edx, dword ptr [eax + 0xc]
            //   57                   | push                edi
            //   8b7e0c               | mov                 edi, dword ptr [esi + 0xc]
            //   752a                 | jne                 0x2c

        $sequence_6 = { 56 8d45d4 50 683f000f00 8d4508 50 c745d418000000 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   50                   | push                eax
            //   683f000f00           | push                0xf003f
            //   8d4508               | lea                 eax, [ebp + 8]
            //   50                   | push                eax
            //   c745d418000000       | mov                 dword ptr [ebp - 0x2c], 0x18

        $sequence_7 = { eb11 53 6a01 53 8d85b0fbffff 50 }
            // n = 6, score = 100
            //   eb11                 | jmp                 0x13
            //   53                   | push                ebx
            //   6a01                 | push                1
            //   53                   | push                ebx
            //   8d85b0fbffff         | lea                 eax, [ebp - 0x450]
            //   50                   | push                eax

        $sequence_8 = { 7c04 3bdf 7429 807d0800 8b0d???????? 8d0431 }
            // n = 6, score = 100
            //   7c04                 | jl                  6
            //   3bdf                 | cmp                 ebx, edi
            //   7429                 | je                  0x2b
            //   807d0800             | cmp                 byte ptr [ebp + 8], 0
            //   8b0d????????         |                     
            //   8d0431               | lea                 eax, [ecx + esi]

        $sequence_9 = { 50 6819000200 8d4508 8d4df8 50 }
            // n = 5, score = 100
            //   50                   | push                eax
            //   6819000200           | push                0x20019
            //   8d4508               | lea                 eax, [ebp + 8]
            //   8d4df8               | lea                 ecx, [ebp - 8]
            //   50                   | push                eax

    condition:
        7 of them and filesize < 75776
}