rule win_pteranodon_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        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 = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 8d8dc0f8ffff e9???????? 8d8dc0f8ffff e9???????? 8d8d08f9ffff }
            // n = 5, score = 100
            //   8d8dc0f8ffff         | lea                 ecx, [ebp - 0x740]
            //   e9????????           |                     
            //   8d8dc0f8ffff         | lea                 ecx, [ebp - 0x740]
            //   e9????????           |                     
            //   8d8d08f9ffff         | lea                 ecx, [ebp - 0x6f8]

        $sequence_1 = { ff15???????? 85c0 74b6 6800010000 }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   74b6                 | je                  0xffffffb8
            //   6800010000           | push                0x100

        $sequence_2 = { 8b85b4faffff 894704 eb02 33ff 8d95b8faffff e8???????? }
            // n = 6, score = 100
            //   8b85b4faffff         | mov                 eax, dword ptr [ebp - 0x54c]
            //   894704               | mov                 dword ptr [edi + 4], eax
            //   eb02                 | jmp                 4
            //   33ff                 | xor                 edi, edi
            //   8d95b8faffff         | lea                 edx, [ebp - 0x548]
            //   e8????????           |                     

        $sequence_3 = { 6af6 ff15???????? 8b04bde0874300 834c0318ff 33c0 eb16 e8???????? }
            // n = 7, score = 100
            //   6af6                 | push                -0xa
            //   ff15????????         |                     
            //   8b04bde0874300       | mov                 eax, dword ptr [edi*4 + 0x4387e0]
            //   834c0318ff           | or                  dword ptr [ebx + eax + 0x18], 0xffffffff
            //   33c0                 | xor                 eax, eax
            //   eb16                 | jmp                 0x18
            //   e8????????           |                     

        $sequence_4 = { ff15???????? 8bf8 89bde4fdffff 85ff 0f8447060000 }
            // n = 5, score = 100
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax
            //   89bde4fdffff         | mov                 dword ptr [ebp - 0x21c], edi
            //   85ff                 | test                edi, edi
            //   0f8447060000         | je                  0x64d

        $sequence_5 = { 52 ff5008 c645fc01 8d4da8 837dbc10 8b55d0 0f434da8 }
            // n = 7, score = 100
            //   52                   | push                edx
            //   ff5008               | call                dword ptr [eax + 8]
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   8d4da8               | lea                 ecx, [ebp - 0x58]
            //   837dbc10             | cmp                 dword ptr [ebp - 0x44], 0x10
            //   8b55d0               | mov                 edx, dword ptr [ebp - 0x30]
            //   0f434da8             | cmovae              ecx, dword ptr [ebp - 0x58]

        $sequence_6 = { 6a04 58 6bc000 c780d460031002000000 6a04 58 }
            // n = 6, score = 100
            //   6a04                 | push                4
            //   58                   | pop                 eax
            //   6bc000               | imul                eax, eax, 0
            //   c780d460031002000000     | mov    dword ptr [eax + 0x100360d4], 2
            //   6a04                 | push                4
            //   58                   | pop                 eax

        $sequence_7 = { 0f82e9feffff eb23 8b4df0 8b0c8de0874300 8a443928 }
            // n = 5, score = 100
            //   0f82e9feffff         | jb                  0xfffffeef
            //   eb23                 | jmp                 0x25
            //   8b4df0               | mov                 ecx, dword ptr [ebp - 0x10]
            //   8b0c8de0874300       | mov                 ecx, dword ptr [ecx*4 + 0x4387e0]
            //   8a443928             | mov                 al, byte ptr [ecx + edi + 0x28]

        $sequence_8 = { 53 8bf0 6a00 56 e8???????? 8b5db8 33c0 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   8bf0                 | mov                 esi, eax
            //   6a00                 | push                0
            //   56                   | push                esi
            //   e8????????           |                     
            //   8b5db8               | mov                 ebx, dword ptr [ebp - 0x48]
            //   33c0                 | xor                 eax, eax

        $sequence_9 = { 894df8 6a0a 8b048db8690310 5b 8b543818 }
            // n = 5, score = 100
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   6a0a                 | push                0xa
            //   8b048db8690310       | mov                 eax, dword ptr [ecx*4 + 0x100369b8]
            //   5b                   | pop                 ebx
            //   8b543818             | mov                 edx, dword ptr [eax + edi + 0x18]

        $sequence_10 = { c645fc07 8b85d4f8ffff 83f810 7213 40 8d8dc0f8ffff }
            // n = 6, score = 100
            //   c645fc07             | mov                 byte ptr [ebp - 4], 7
            //   8b85d4f8ffff         | mov                 eax, dword ptr [ebp - 0x72c]
            //   83f810               | cmp                 eax, 0x10
            //   7213                 | jb                  0x15
            //   40                   | inc                 eax
            //   8d8dc0f8ffff         | lea                 ecx, [ebp - 0x740]

        $sequence_11 = { c745fc00000000 6a00 50 e8???????? 680a020000 8d85e0fdffff }
            // n = 6, score = 100
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   680a020000           | push                0x20a
            //   8d85e0fdffff         | lea                 eax, [ebp - 0x220]

        $sequence_12 = { 898594f6ffff 85c0 0f8ee6040000 33f6 0f1f4000 8d85a8f8ffff }
            // n = 6, score = 100
            //   898594f6ffff         | mov                 dword ptr [ebp - 0x96c], eax
            //   85c0                 | test                eax, eax
            //   0f8ee6040000         | jle                 0x4ec
            //   33f6                 | xor                 esi, esi
            //   0f1f4000             | nop                 dword ptr [eax]
            //   8d85a8f8ffff         | lea                 eax, [ebp - 0x758]

        $sequence_13 = { 2b49fc e9???????? 55 8bec 56 8d71f8 }
            // n = 6, score = 100
            //   2b49fc               | sub                 ecx, dword ptr [ecx - 4]
            //   e9????????           |                     
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   56                   | push                esi
            //   8d71f8               | lea                 esi, [ecx - 8]

        $sequence_14 = { ba1d000000 e9???????? 833d????????00 0f857cb40000 8d0dc0b24200 ba1d000000 }
            // n = 6, score = 100
            //   ba1d000000           | mov                 edx, 0x1d
            //   e9????????           |                     
            //   833d????????00       |                     
            //   0f857cb40000         | jne                 0xb482
            //   8d0dc0b24200         | lea                 ecx, [0x42b2c0]
            //   ba1d000000           | mov                 edx, 0x1d

        $sequence_15 = { 8d8df0f8ffff e9???????? 8d8d08f9ffff e9???????? e8???????? c3 8d8dd8f8ffff }
            // n = 7, score = 100
            //   8d8df0f8ffff         | lea                 ecx, [ebp - 0x710]
            //   e9????????           |                     
            //   8d8d08f9ffff         | lea                 ecx, [ebp - 0x6f8]
            //   e9????????           |                     
            //   e8????????           |                     
            //   c3                   | ret                 
            //   8d8dd8f8ffff         | lea                 ecx, [ebp - 0x728]

    condition:
        7 of them and filesize < 499712
}