rule win_pebbledash_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.pebbledash."
        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.pebbledash"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { f7d8 88856cfeffff 8b4df8 83e120 f7d9 1bc9 f7d9 }
            // n = 7, score = 100
            //   f7d8                 | neg                 eax
            //   88856cfeffff         | mov                 byte ptr [ebp - 0x194], al
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   83e120               | and                 ecx, 0x20
            //   f7d9                 | neg                 ecx
            //   1bc9                 | sbb                 ecx, ecx
            //   f7d9                 | neg                 ecx

        $sequence_1 = { c3 55 8bec 83ec14 c745f000000000 c745f400000000 8d4508 }
            // n = 7, score = 100
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   83ec14               | sub                 esp, 0x14
            //   c745f000000000       | mov                 dword ptr [ebp - 0x10], 0
            //   c745f400000000       | mov                 dword ptr [ebp - 0xc], 0
            //   8d4508               | lea                 eax, [ebp + 8]

        $sequence_2 = { c645f9ac c645fae3 c645fb25 c645e400 33c9 894de5 682c010000 }
            // n = 7, score = 100
            //   c645f9ac             | mov                 byte ptr [ebp - 7], 0xac
            //   c645fae3             | mov                 byte ptr [ebp - 6], 0xe3
            //   c645fb25             | mov                 byte ptr [ebp - 5], 0x25
            //   c645e400             | mov                 byte ptr [ebp - 0x1c], 0
            //   33c9                 | xor                 ecx, ecx
            //   894de5               | mov                 dword ptr [ebp - 0x1b], ecx
            //   682c010000           | push                0x12c

        $sequence_3 = { e8???????? 83c408 85c0 7407 c745f4ffffffff 8d45d4 50 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax
            //   7407                 | je                  9
            //   c745f4ffffffff       | mov                 dword ptr [ebp - 0xc], 0xffffffff
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   50                   | push                eax

        $sequence_4 = { 52 e8???????? 83c404 8b8518feffff c74004ffffffff 8b8d18feffff 8b5508 }
            // n = 7, score = 100
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8b8518feffff         | mov                 eax, dword ptr [ebp - 0x1e8]
            //   c74004ffffffff       | mov                 dword ptr [eax + 4], 0xffffffff
            //   8b8d18feffff         | mov                 ecx, dword ptr [ebp - 0x1e8]
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]

        $sequence_5 = { 8b95ccfeffff 8b4204 8945fc 8d8dd0feffff 51 8b550c 52 }
            // n = 7, score = 100
            //   8b95ccfeffff         | mov                 edx, dword ptr [ebp - 0x134]
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8d8dd0feffff         | lea                 ecx, [ebp - 0x130]
            //   51                   | push                ecx
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   52                   | push                edx

        $sequence_6 = { 51 b9???????? e8???????? 85c0 7504 33c0 eb30 }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   b9????????           |                     
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7504                 | jne                 6
            //   33c0                 | xor                 eax, eax
            //   eb30                 | jmp                 0x32

        $sequence_7 = { c68565ffffff82 c68566ffffffc2 c68567ffffff82 c68568ffffff07 c68569ffffffdc c6856affffff18 }
            // n = 6, score = 100
            //   c68565ffffff82       | mov                 byte ptr [ebp - 0x9b], 0x82
            //   c68566ffffffc2       | mov                 byte ptr [ebp - 0x9a], 0xc2
            //   c68567ffffff82       | mov                 byte ptr [ebp - 0x99], 0x82
            //   c68568ffffff07       | mov                 byte ptr [ebp - 0x98], 7
            //   c68569ffffffdc       | mov                 byte ptr [ebp - 0x97], 0xdc
            //   c6856affffff18       | mov                 byte ptr [ebp - 0x96], 0x18

        $sequence_8 = { 8b85acf9ffff 50 ff15???????? c785a8f9fffffcffffff 6a00 8d8da4f9ffff 51 }
            // n = 7, score = 100
            //   8b85acf9ffff         | mov                 eax, dword ptr [ebp - 0x654]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   c785a8f9fffffcffffff     | mov    dword ptr [ebp - 0x658], 0xfffffffc
            //   6a00                 | push                0
            //   8d8da4f9ffff         | lea                 ecx, [ebp - 0x65c]
            //   51                   | push                ecx

        $sequence_9 = { 8b8550fbffff 83b85c03000000 7414 8b8d50fbffff 8b915c030000 899550fbffff ebdd }
            // n = 7, score = 100
            //   8b8550fbffff         | mov                 eax, dword ptr [ebp - 0x4b0]
            //   83b85c03000000       | cmp                 dword ptr [eax + 0x35c], 0
            //   7414                 | je                  0x16
            //   8b8d50fbffff         | mov                 ecx, dword ptr [ebp - 0x4b0]
            //   8b915c030000         | mov                 edx, dword ptr [ecx + 0x35c]
            //   899550fbffff         | mov                 dword ptr [ebp - 0x4b0], edx
            //   ebdd                 | jmp                 0xffffffdf

    condition:
        7 of them and filesize < 360448
}