rule win_httpbrowser_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.httpbrowser"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 85c0 7508 ff15???????? 8bf0 395df0 740c ff75f0 }
            // n = 7, score = 200
            //   85c0                 | test                eax, eax
            //   7508                 | jne                 0xa
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   395df0               | cmp                 dword ptr [ebp - 0x10], ebx
            //   740c                 | je                  0xe
            //   ff75f0               | push                dword ptr [ebp - 0x10]

        $sequence_1 = { 50 0fb685eefdffff 50 0fb685edfdffff 50 0fb685ecfdffff }
            // n = 6, score = 200
            //   50                   | push                eax
            //   0fb685eefdffff       | movzx               eax, byte ptr [ebp - 0x212]
            //   50                   | push                eax
            //   0fb685edfdffff       | movzx               eax, byte ptr [ebp - 0x213]
            //   50                   | push                eax
            //   0fb685ecfdffff       | movzx               eax, byte ptr [ebp - 0x214]

        $sequence_2 = { e8???????? 83c418 56 8d85f0fdffff 50 89bd6453ffff }
            // n = 6, score = 200
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   56                   | push                esi
            //   8d85f0fdffff         | lea                 eax, [ebp - 0x210]
            //   50                   | push                eax
            //   89bd6453ffff         | mov                 dword ptr [ebp - 0xac9c], edi

        $sequence_3 = { 50 89bd90feffff 33db 89bd9cfeffff 89bda0feffff 89bd98feffff c785a4feffff14010000 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   89bd90feffff         | mov                 dword ptr [ebp - 0x170], edi
            //   33db                 | xor                 ebx, ebx
            //   89bd9cfeffff         | mov                 dword ptr [ebp - 0x164], edi
            //   89bda0feffff         | mov                 dword ptr [ebp - 0x160], edi
            //   89bd98feffff         | mov                 dword ptr [ebp - 0x168], edi
            //   c785a4feffff14010000     | mov    dword ptr [ebp - 0x15c], 0x114

        $sequence_4 = { 6a05 ffb5ecedffff ba???????? b9???????? }
            // n = 4, score = 200
            //   6a05                 | push                5
            //   ffb5ecedffff         | push                dword ptr [ebp - 0x1214]
            //   ba????????           |                     
            //   b9????????           |                     

        $sequence_5 = { 7564 8d45f8 50 8dbe5c0e0000 }
            // n = 4, score = 200
            //   7564                 | jne                 0x66
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax
            //   8dbe5c0e0000         | lea                 edi, [esi + 0xe5c]

        $sequence_6 = { ff15???????? 8d85f4fdffff 50 53 57 }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   8d85f4fdffff         | lea                 eax, [ebp - 0x20c]
            //   50                   | push                eax
            //   53                   | push                ebx
            //   57                   | push                edi

        $sequence_7 = { 56 33c0 8dbdf8fbffff 6a40 ab ff15???????? }
            // n = 6, score = 200
            //   56                   | push                esi
            //   33c0                 | xor                 eax, eax
            //   8dbdf8fbffff         | lea                 edi, [ebp - 0x408]
            //   6a40                 | push                0x40
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ff15????????         |                     

        $sequence_8 = { 8bce 83e103 f3aa 68???????? 68???????? }
            // n = 5, score = 100
            //   8bce                 | mov                 ecx, esi
            //   83e103               | and                 ecx, 3
            //   f3aa                 | rep stosb           byte ptr es:[edi], al
            //   68????????           |                     
            //   68????????           |                     

        $sequence_9 = { b907000000 8d7ddc 8945d8 8945fc f3ab 50 }
            // n = 6, score = 100
            //   b907000000           | mov                 ecx, 7
            //   8d7ddc               | lea                 edi, [ebp - 0x24]
            //   8945d8               | mov                 dword ptr [ebp - 0x28], eax
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   50                   | push                eax

        $sequence_10 = { 56 a3???????? e8???????? 685e0513ec 56 a3???????? }
            // n = 6, score = 100
            //   56                   | push                esi
            //   a3????????           |                     
            //   e8????????           |                     
            //   685e0513ec           | push                0xec13055e
            //   56                   | push                esi
            //   a3????????           |                     

        $sequence_11 = { 5d 58 6a14 8d8524ffffff }
            // n = 4, score = 100
            //   5d                   | pop                 ebp
            //   58                   | pop                 eax
            //   6a14                 | push                0x14
            //   8d8524ffffff         | lea                 eax, [ebp - 0xdc]

        $sequence_12 = { 5d 8a4c15b8 884dec 8b45ec }
            // n = 4, score = 100
            //   5d                   | pop                 ebp
            //   8a4c15b8             | mov                 cl, byte ptr [ebp + edx - 0x48]
            //   884dec               | mov                 byte ptr [ebp - 0x14], cl
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]

        $sequence_13 = { b9ff010000 33c0 8dbd15edffff 889514edffff f3ab 66ab aa }
            // n = 7, score = 100
            //   b9ff010000           | mov                 ecx, 0x1ff
            //   33c0                 | xor                 eax, eax
            //   8dbd15edffff         | lea                 edi, [ebp - 0x12eb]
            //   889514edffff         | mov                 byte ptr [ebp - 0x12ec], dl
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al

        $sequence_14 = { 895dfc 66ab 50 50 }
            // n = 4, score = 100
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   50                   | push                eax
            //   50                   | push                eax

        $sequence_15 = { 52 e8???????? 83c414 68???????? 68???????? 50 }
            // n = 6, score = 100
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14
            //   68????????           |                     
            //   68????????           |                     
            //   50                   | push                eax

    condition:
        7 of them and filesize < 188416
}