rule win_pteranodon_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.pteranodon."
        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.pteranodon"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { f2c3 8b4de4 33cd f2e81328feff }
            // n = 4, score = 100
            //   f2c3                 | bnd ret             
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]
            //   33cd                 | xor                 ecx, ebp
            //   f2e81328feff         | bnd call            0xfffe2819

        $sequence_1 = { 40 8d8dd8feffff 50 ffb5d8feffff e8???????? 56 8d8dd8feffff }
            // n = 7, score = 100
            //   40                   | inc                 eax
            //   8d8dd8feffff         | lea                 ecx, [ebp - 0x128]
            //   50                   | push                eax
            //   ffb5d8feffff         | push                dword ptr [ebp - 0x128]
            //   e8????????           |                     
            //   56                   | push                esi
            //   8d8dd8feffff         | lea                 ecx, [ebp - 0x128]

        $sequence_2 = { 85c9 0f84d3000000 8b048d94f00210 89859cf8ffff 85c0 0f8498000000 }
            // n = 6, score = 100
            //   85c9                 | test                ecx, ecx
            //   0f84d3000000         | je                  0xd9
            //   8b048d94f00210       | mov                 eax, dword ptr [ecx*4 + 0x1002f094]
            //   89859cf8ffff         | mov                 dword ptr [ebp - 0x764], eax
            //   85c0                 | test                eax, eax
            //   0f8498000000         | je                  0x9e

        $sequence_3 = { 8d041f 8975d0 8975e0 8975f0 c745f4d0d00210 8b7485bc 8d4601 }
            // n = 7, score = 100
            //   8d041f               | lea                 eax, [edi + ebx]
            //   8975d0               | mov                 dword ptr [ebp - 0x30], esi
            //   8975e0               | mov                 dword ptr [ebp - 0x20], esi
            //   8975f0               | mov                 dword ptr [ebp - 0x10], esi
            //   c745f4d0d00210       | mov                 dword ptr [ebp - 0xc], 0x1002d0d0
            //   8b7485bc             | mov                 esi, dword ptr [ebp + eax*4 - 0x44]
            //   8d4601               | lea                 eax, [esi + 1]

        $sequence_4 = { 8bc8 e8???????? 6a01 57 e8???????? 8d8520f9ffff }
            // n = 6, score = 100
            //   8bc8                 | mov                 ecx, eax
            //   e8????????           |                     
            //   6a01                 | push                1
            //   57                   | push                edi
            //   e8????????           |                     
            //   8d8520f9ffff         | lea                 eax, [ebp - 0x6e0]

        $sequence_5 = { ffb590feffff e8???????? 8b858cfeffff c785a4feffff0f000000 c785a0feffff00000000 c68590feffff00 }
            // n = 6, score = 100
            //   ffb590feffff         | push                dword ptr [ebp - 0x170]
            //   e8????????           |                     
            //   8b858cfeffff         | mov                 eax, dword ptr [ebp - 0x174]
            //   c785a4feffff0f000000     | mov    dword ptr [ebp - 0x15c], 0xf
            //   c785a0feffff00000000     | mov    dword ptr [ebp - 0x160], 0
            //   c68590feffff00       | mov                 byte ptr [ebp - 0x170], 0

        $sequence_6 = { c746140f000000 c7461000000000 c60600 807dec00 7504 }
            // n = 5, score = 100
            //   c746140f000000       | mov                 dword ptr [esi + 0x14], 0xf
            //   c7461000000000       | mov                 dword ptr [esi + 0x10], 0
            //   c60600               | mov                 byte ptr [esi], 0
            //   807dec00             | cmp                 byte ptr [ebp - 0x14], 0
            //   7504                 | jne                 6

        $sequence_7 = { 8d8d08f9ffff e8???????? 8d8da8f8ffff c645fc31 51 8bd0 8d8dc0f8ffff }
            // n = 7, score = 100
            //   8d8d08f9ffff         | lea                 ecx, [ebp - 0x6f8]
            //   e8????????           |                     
            //   8d8da8f8ffff         | lea                 ecx, [ebp - 0x758]
            //   c645fc31             | mov                 byte ptr [ebp - 4], 0x31
            //   51                   | push                ecx
            //   8bd0                 | mov                 edx, eax
            //   8d8dc0f8ffff         | lea                 ecx, [ebp - 0x740]

        $sequence_8 = { 50 ff15???????? 8b35???????? 83f801 }
            // n = 4, score = 100
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b35????????         |                     
            //   83f801               | cmp                 eax, 1

        $sequence_9 = { 0f83c0000000 53 56 8d4dd8 e8???????? 8b4dec }
            // n = 6, score = 100
            //   0f83c0000000         | jae                 0xc6
            //   53                   | push                ebx
            //   56                   | push                esi
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]
            //   e8????????           |                     
            //   8b4dec               | mov                 ecx, dword ptr [ebp - 0x14]

    condition:
        7 of them and filesize < 499712
}