rule win_solarbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.solarbot."
        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.solarbot"
        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 = { 89c7 6800020000 8d8500feffff 50 e8???????? }
            // n = 5, score = 300
            //   89c7                 | mov                 edi, eax
            //   6800020000           | push                0x200
            //   8d8500feffff         | lea                 eax, [ebp - 0x200]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_1 = { 8b7508 8a5d0c 8b7d10 c745d800000000 6a20 8d45dc 50 }
            // n = 7, score = 300
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8a5d0c               | mov                 bl, byte ptr [ebp + 0xc]
            //   8b7d10               | mov                 edi, dword ptr [ebp + 0x10]
            //   c745d800000000       | mov                 dword ptr [ebp - 0x28], 0
            //   6a20                 | push                0x20
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   50                   | push                eax

        $sequence_2 = { 83ec04 64a130000000 8b400c 8b4014 8b00 8b00 8b4010 }
            // n = 7, score = 300
            //   83ec04               | sub                 esp, 4
            //   64a130000000         | mov                 eax, dword ptr fs:[0x30]
            //   8b400c               | mov                 eax, dword ptr [eax + 0xc]
            //   8b4014               | mov                 eax, dword ptr [eax + 0x14]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8b4010               | mov                 eax, dword ptr [eax + 0x10]

        $sequence_3 = { e8???????? 8d45f0 50 8d85f0fbffff 50 6a00 6a00 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   8d85f0fbffff         | lea                 eax, [ebp - 0x410]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_4 = { e8???????? c3 f4 e8???????? c3 e8???????? 45 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   c3                   | ret                 
            //   f4                   | hlt                 
            //   e8????????           |                     
            //   c3                   | ret                 
            //   e8????????           |                     
            //   45                   | inc                 ebp

        $sequence_5 = { 0fb6d1 83fa68 7405 80f9e9 7502 }
            // n = 5, score = 300
            //   0fb6d1               | movzx               edx, cl
            //   83fa68               | cmp                 edx, 0x68
            //   7405                 | je                  7
            //   80f9e9               | cmp                 cl, 0xe9
            //   7502                 | jne                 4

        $sequence_6 = { 8d45e0 50 8b45fc 8b55e8 01d0 50 }
            // n = 6, score = 300
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   50                   | push                eax
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8b55e8               | mov                 edx, dword ptr [ebp - 0x18]
            //   01d0                 | add                 eax, edx
            //   50                   | push                eax

        $sequence_7 = { 83c044 8985e4fdffff 8b85e0fdffff 0385d0fdffff 8b583c 83bdccfdffff01 7532 }
            // n = 7, score = 300
            //   83c044               | add                 eax, 0x44
            //   8985e4fdffff         | mov                 dword ptr [ebp - 0x21c], eax
            //   8b85e0fdffff         | mov                 eax, dword ptr [ebp - 0x220]
            //   0385d0fdffff         | add                 eax, dword ptr [ebp - 0x230]
            //   8b583c               | mov                 ebx, dword ptr [eax + 0x3c]
            //   83bdccfdffff01       | cmp                 dword ptr [ebp - 0x234], 1
            //   7532                 | jne                 0x34

        $sequence_8 = { 83fe05 750a ff75f0 56 }
            // n = 4, score = 300
            //   83fe05               | cmp                 esi, 5
            //   750a                 | jne                 0xc
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   56                   | push                esi

        $sequence_9 = { ffd0 668945f2 66c745f00200 8b45f4 85c0 0f86a9020000 }
            // n = 6, score = 300
            //   ffd0                 | call                eax
            //   668945f2             | mov                 word ptr [ebp - 0xe], ax
            //   66c745f00200         | mov                 word ptr [ebp - 0x10], 2
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   85c0                 | test                eax, eax
            //   0f86a9020000         | jbe                 0x2af

    condition:
        7 of them and filesize < 204800
}