rule win_httpbrowser_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.httpbrowser."
        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.httpbrowser"
        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 = { 85c0 0f84e4000000 e8???????? 85c0 0f85d7000000 8d85e4fbffff 50 }
            // n = 7, score = 200
            //   85c0                 | test                eax, eax
            //   0f84e4000000         | je                  0xea
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f85d7000000         | jne                 0xdd
            //   8d85e4fbffff         | lea                 eax, [ebp - 0x41c]
            //   50                   | push                eax

        $sequence_1 = { 0385f4edffff 83c440 6a00 50 53 }
            // n = 5, score = 200
            //   0385f4edffff         | add                 eax, dword ptr [ebp - 0x120c]
            //   83c440               | add                 esp, 0x40
            //   6a00                 | push                0
            //   50                   | push                eax
            //   53                   | push                ebx

        $sequence_2 = { 50 8d85c8f3ffff 50 ffd3 68???????? 8d85c8f3ffff 50 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8d85c8f3ffff         | lea                 eax, [ebp - 0xc38]
            //   50                   | push                eax
            //   ffd3                 | call                ebx
            //   68????????           |                     
            //   8d85c8f3ffff         | lea                 eax, [ebp - 0xc38]
            //   50                   | push                eax

        $sequence_3 = { 8d8598feffff 50 8d45b8 50 57 6a1a }
            // n = 6, score = 200
            //   8d8598feffff         | lea                 eax, [ebp - 0x168]
            //   50                   | push                eax
            //   8d45b8               | lea                 eax, [ebp - 0x48]
            //   50                   | push                eax
            //   57                   | push                edi
            //   6a1a                 | push                0x1a

        $sequence_4 = { 56 56 56 53 ff15???????? 56 8d85dcfbffff }
            // n = 7, score = 200
            //   56                   | push                esi
            //   56                   | push                esi
            //   56                   | push                esi
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   56                   | push                esi
            //   8d85dcfbffff         | lea                 eax, [ebp - 0x424]

        $sequence_5 = { 50 ff55f4 85c0 754d 395df8 }
            // n = 5, score = 200
            //   50                   | push                eax
            //   ff55f4               | call                dword ptr [ebp - 0xc]
            //   85c0                 | test                eax, eax
            //   754d                 | jne                 0x4f
            //   395df8               | cmp                 dword ptr [ebp - 8], ebx

        $sequence_6 = { 85f6 7417 57 ff750c 56 }
            // n = 5, score = 200
            //   85f6                 | test                esi, esi
            //   7417                 | je                  0x19
            //   57                   | push                edi
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   56                   | push                esi

        $sequence_7 = { 3bde 0f844dffffff 56 57 ffb5e0fbffff 53 }
            // n = 6, score = 200
            //   3bde                 | cmp                 ebx, esi
            //   0f844dffffff         | je                  0xffffff53
            //   56                   | push                esi
            //   57                   | push                edi
            //   ffb5e0fbffff         | push                dword ptr [ebp - 0x420]
            //   53                   | push                ebx

        $sequence_8 = { 52 ff15???????? 83f8ff 894508 0f84be010000 }
            // n = 5, score = 100
            //   52                   | push                edx
            //   ff15????????         |                     
            //   83f8ff               | cmp                 eax, -1
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   0f84be010000         | je                  0x1c4

        $sequence_9 = { c1f905 8b0c8d00644100 f644c10401 8d04c1 }
            // n = 4, score = 100
            //   c1f905               | sar                 ecx, 5
            //   8b0c8d00644100       | mov                 ecx, dword ptr [ecx*4 + 0x416400]
            //   f644c10401           | test                byte ptr [ecx + eax*8 + 4], 1
            //   8d04c1               | lea                 eax, [ecx + eax*8]

        $sequence_10 = { 5d 5d 9d 5d 6a00 6a02 ff15???????? }
            // n = 7, score = 100
            //   5d                   | pop                 ebp
            //   5d                   | pop                 ebp
            //   9d                   | popfd               
            //   5d                   | pop                 ebp
            //   6a00                 | push                0
            //   6a02                 | push                2
            //   ff15????????         |                     

        $sequence_11 = { 668b0d???????? 53 56 8955e0 57 8945e4 }
            // n = 6, score = 100
            //   668b0d????????       |                     
            //   53                   | push                ebx
            //   56                   | push                esi
            //   8955e0               | mov                 dword ptr [ebp - 0x20], edx
            //   57                   | push                edi
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax

        $sequence_12 = { 81e2ffff0000 83c241 8955fc 50 50 9c b80a000000 }
            // n = 7, score = 100
            //   81e2ffff0000         | and                 edx, 0xffff
            //   83c241               | add                 edx, 0x41
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   50                   | push                eax
            //   50                   | push                eax
            //   9c                   | pushfd              
            //   b80a000000           | mov                 eax, 0xa

        $sequence_13 = { 51 52 ff15???????? 85c0 0f85f2000000 ff15???????? }
            // n = 6, score = 100
            //   51                   | push                ecx
            //   52                   | push                edx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f85f2000000         | jne                 0xf8
            //   ff15????????         |                     

        $sequence_14 = { 6818b73cb3 56 e8???????? 68a6c0d527 56 a3???????? e8???????? }
            // n = 7, score = 100
            //   6818b73cb3           | push                0xb33cb718
            //   56                   | push                esi
            //   e8????????           |                     
            //   68a6c0d527           | push                0x27d5c0a6
            //   56                   | push                esi
            //   a3????????           |                     
            //   e8????????           |                     

        $sequence_15 = { 6aff 52 6a00 68e9fd0000 ff15???????? 8b55f8 68???????? }
            // n = 7, score = 100
            //   6aff                 | push                -1
            //   52                   | push                edx
            //   6a00                 | push                0
            //   68e9fd0000           | push                0xfde9
            //   ff15????????         |                     
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   68????????           |                     

    condition:
        7 of them and filesize < 188416
}