rule win_lobshot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.lobshot."
        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.lobshot"
        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 = { 8b55e8 8b430c 893c88 41 83ea01 75f4 8b55f0 }
            // n = 7, score = 100
            //   8b55e8               | mov                 edx, dword ptr [ebp - 0x18]
            //   8b430c               | mov                 eax, dword ptr [ebx + 0xc]
            //   893c88               | mov                 dword ptr [eax + ecx*4], edi
            //   41                   | inc                 ecx
            //   83ea01               | sub                 edx, 1
            //   75f4                 | jne                 0xfffffff6
            //   8b55f0               | mov                 edx, dword ptr [ebp - 0x10]

        $sequence_1 = { 7d04 3bc3 7461 3bf2 8b5508 7d0a 6601b481740a0000 }
            // n = 7, score = 100
            //   7d04                 | jge                 6
            //   3bc3                 | cmp                 eax, ebx
            //   7461                 | je                  0x63
            //   3bf2                 | cmp                 esi, edx
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   7d0a                 | jge                 0xc
            //   6601b481740a0000     | add                 word ptr [ecx + eax*4 + 0xa74], si

        $sequence_2 = { 8d5f14 8b13 668bc6 66d3e0 660987b0160000 8d4708 8b08 }
            // n = 7, score = 100
            //   8d5f14               | lea                 ebx, [edi + 0x14]
            //   8b13                 | mov                 edx, dword ptr [ebx]
            //   668bc6               | mov                 ax, si
            //   66d3e0               | shl                 ax, cl
            //   660987b0160000       | or                  word ptr [edi + 0x16b0], ax
            //   8d4708               | lea                 eax, [edi + 8]
            //   8b08                 | mov                 ecx, dword ptr [eax]

        $sequence_3 = { 56 57 660fefc8 50 0f114c2410 ffd3 8bf8 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   57                   | push                edi
            //   660fefc8             | pxor                xmm1, xmm0
            //   50                   | push                eax
            //   0f114c2410           | movups              xmmword ptr [esp + 0x10], xmm1
            //   ffd3                 | call                ebx
            //   8bf8                 | mov                 edi, eax

        $sequence_4 = { e8???????? 85c0 7409 8b5c2414 e9???????? 33c9 e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7409                 | je                  0xb
            //   8b5c2414             | mov                 ebx, dword ptr [esp + 0x14]
            //   e9????????           |                     
            //   33c9                 | xor                 ecx, ecx
            //   e8????????           |                     

        $sequence_5 = { 0f42c8 33ff 894d08 47 8b4e6c 3bcf 771f }
            // n = 7, score = 100
            //   0f42c8               | cmovb               ecx, eax
            //   33ff                 | xor                 edi, edi
            //   894d08               | mov                 dword ptr [ebp + 8], ecx
            //   47                   | inc                 edi
            //   8b4e6c               | mov                 ecx, dword ptr [esi + 0x6c]
            //   3bcf                 | cmp                 ecx, edi
            //   771f                 | ja                  0x21

        $sequence_6 = { 68???????? c605????????06 893d???????? 891d???????? ff15???????? 5b }
            // n = 6, score = 100
            //   68????????           |                     
            //   c605????????06       |                     
            //   893d????????         |                     
            //   891d????????         |                     
            //   ff15????????         |                     
            //   5b                   | pop                 ebx

        $sequence_7 = { 8b8600034100 8b3c85307a4100 8d842458020000 57 50 ffd3 57 }
            // n = 7, score = 100
            //   8b8600034100         | mov                 eax, dword ptr [esi + 0x410300]
            //   8b3c85307a4100       | mov                 edi, dword ptr [eax*4 + 0x417a30]
            //   8d842458020000       | lea                 eax, [esp + 0x258]
            //   57                   | push                edi
            //   50                   | push                eax
            //   ffd3                 | call                ebx
            //   57                   | push                edi

        $sequence_8 = { 8b4df8 6a10 5a 2bd0 0fb7c1 8b4dec 8945dc }
            // n = 7, score = 100
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   6a10                 | push                0x10
            //   5a                   | pop                 edx
            //   2bd0                 | sub                 edx, eax
            //   0fb7c1               | movzx               eax, cx
            //   8b4dec               | mov                 ecx, dword ptr [ebp - 0x14]
            //   8945dc               | mov                 dword ptr [ebp - 0x24], eax

        $sequence_9 = { 6a1d 6aff 6a00 6689836c030000 ff15???????? 84c0 7407 }
            // n = 7, score = 100
            //   6a1d                 | push                0x1d
            //   6aff                 | push                -1
            //   6a00                 | push                0
            //   6689836c030000       | mov                 word ptr [ebx + 0x36c], ax
            //   ff15????????         |                     
            //   84c0                 | test                al, al
            //   7407                 | je                  9

    condition:
        7 of them and filesize < 247808
}