rule win_httpbrowser_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.httpbrowser"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { ffd7 8d85dcf9ffff 50 ff15???????? }
            // n = 4, score = 200
            //   ffd7                 | call                edi
            //   8d85dcf9ffff         | lea                 eax, [ebp - 0x624]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_1 = { c78568f1ffff04000000 ff15???????? 818d74f1ffff80310000 6a04 }
            // n = 4, score = 200
            //   c78568f1ffff04000000     | mov    dword ptr [ebp - 0xe98], 4
            //   ff15????????         |                     
            //   818d74f1ffff80310000     | or    dword ptr [ebp - 0xe8c], 0x3180
            //   6a04                 | push                4

        $sequence_2 = { 8bf0 85f6 7417 57 ff750c }
            // n = 5, score = 200
            //   8bf0                 | mov                 esi, eax
            //   85f6                 | test                esi, esi
            //   7417                 | je                  0x19
            //   57                   | push                edi
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_3 = { 3d192f0000 0f85c2000000 8d8568f1ffff 50 }
            // n = 4, score = 200
            //   3d192f0000           | cmp                 eax, 0x2f19
            //   0f85c2000000         | jne                 0xc8
            //   8d8568f1ffff         | lea                 eax, [ebp - 0xe98]
            //   50                   | push                eax

        $sequence_4 = { 53 53 ff15???????? 33c0 56 6689047e }
            // n = 6, score = 200
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   56                   | push                esi
            //   6689047e             | mov                 word ptr [esi + edi*2], ax

        $sequence_5 = { 8d45b8 50 57 6a16 c78598feffff44000000 ff15???????? }
            // n = 6, score = 200
            //   8d45b8               | lea                 eax, [ebp - 0x48]
            //   50                   | push                eax
            //   57                   | push                edi
            //   6a16                 | push                0x16
            //   c78598feffff44000000     | mov    dword ptr [ebp - 0x168], 0x44
            //   ff15????????         |                     

        $sequence_6 = { a1???????? 33c5 8945fc 56 33c0 befe000000 }
            // n = 6, score = 200
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   56                   | push                esi
            //   33c0                 | xor                 eax, eax
            //   befe000000           | mov                 esi, 0xfe

        $sequence_7 = { 89bda0feffff 89bd98feffff c785a4feffff14010000 e8???????? 83c40c 8d859cfeffff }
            // n = 6, score = 200
            //   89bda0feffff         | mov                 dword ptr [ebp - 0x160], edi
            //   89bd98feffff         | mov                 dword ptr [ebp - 0x168], edi
            //   c785a4feffff14010000     | mov    dword ptr [ebp - 0x15c], 0x114
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8d859cfeffff         | lea                 eax, [ebp - 0x164]

        $sequence_8 = { 0fb601 0fb6fa 3bc7 7714 8b55fc 8a92704d4100 0890a1524100 }
            // n = 7, score = 100
            //   0fb601               | movzx               eax, byte ptr [ecx]
            //   0fb6fa               | movzx               edi, dl
            //   3bc7                 | cmp                 eax, edi
            //   7714                 | ja                  0x16
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   8a92704d4100         | mov                 dl, byte ptr [edx + 0x414d70]
            //   0890a1524100         | or                  byte ptr [eax + 0x4152a1], dl

        $sequence_9 = { 8bd1 c1f805 83e21f 8b048500644100 8d04d0 eb05 b8???????? }
            // n = 7, score = 100
            //   8bd1                 | mov                 edx, ecx
            //   c1f805               | sar                 eax, 5
            //   83e21f               | and                 edx, 0x1f
            //   8b048500644100       | mov                 eax, dword ptr [eax*4 + 0x416400]
            //   8d04d0               | lea                 eax, [eax + edx*8]
            //   eb05                 | jmp                 7
            //   b8????????           |                     

        $sequence_10 = { a1???????? 8b0d???????? 8955bc 668b15???????? 83c40c 8945c0 }
            // n = 6, score = 100
            //   a1????????           |                     
            //   8b0d????????         |                     
            //   8955bc               | mov                 dword ptr [ebp - 0x44], edx
            //   668b15????????       |                     
            //   83c40c               | add                 esp, 0xc
            //   8945c0               | mov                 dword ptr [ebp - 0x40], eax

        $sequence_11 = { 7718 c705????????0d000000 c3 8b04d554474100 a3???????? }
            // n = 5, score = 100
            //   7718                 | ja                  0x1a
            //   c705????????0d000000     |     
            //   c3                   | ret                 
            //   8b04d554474100       | mov                 eax, dword ptr [edx*8 + 0x414754]
            //   a3????????           |                     

        $sequence_12 = { 51 680d000020 56 ff15???????? 6a00 }
            // n = 5, score = 100
            //   51                   | push                ecx
            //   680d000020           | push                0x2000000d
            //   56                   | push                esi
            //   ff15????????         |                     
            //   6a00                 | push                0

        $sequence_13 = { c745f000280000 66ab aa 8b4514 2bc2 3d00280000 7303 }
            // n = 7, score = 100
            //   c745f000280000       | mov                 dword ptr [ebp - 0x10], 0x2800
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al
            //   8b4514               | mov                 eax, dword ptr [ebp + 0x14]
            //   2bc2                 | sub                 eax, edx
            //   3d00280000           | cmp                 eax, 0x2800
            //   7303                 | jae                 5

        $sequence_14 = { 9d 5d 58 8d45fc }
            // n = 4, score = 100
            //   9d                   | popfd               
            //   5d                   | pop                 ebp
            //   58                   | pop                 eax
            //   8d45fc               | lea                 eax, [ebp - 4]

        $sequence_15 = { 5d 8b45fc 8b7508 8d55f0 6a00 52 }
            // n = 6, score = 100
            //   5d                   | pop                 ebp
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8d55f0               | lea                 edx, [ebp - 0x10]
            //   6a00                 | push                0
            //   52                   | push                edx

    condition:
        7 of them and filesize < 188416
}