rule win_sepulcher_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.sepulcher."
        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.sepulcher"
        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 = { 53 ffb24c460000 ff15???????? 85c0 7e1d }
            // n = 5, score = 100
            //   53                   | push                ebx
            //   ffb24c460000         | push                dword ptr [edx + 0x464c]
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7e1d                 | jle                 0x1f

        $sequence_1 = { e8???????? 8b35???????? 83c410 c745cd08080402 6a10 }
            // n = 5, score = 100
            //   e8????????           |                     
            //   8b35????????         |                     
            //   83c410               | add                 esp, 0x10
            //   c745cd08080402       | mov                 dword ptr [ebp - 0x33], 0x2040808
            //   6a10                 | push                0x10

        $sequence_2 = { 7810 3de4000000 7309 8b04c5d87b0110 5d c3 33c0 }
            // n = 7, score = 100
            //   7810                 | js                  0x12
            //   3de4000000           | cmp                 eax, 0xe4
            //   7309                 | jae                 0xb
            //   8b04c5d87b0110       | mov                 eax, dword ptr [eax*8 + 0x10017bd8]
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   33c0                 | xor                 eax, eax

        $sequence_3 = { 8d8c24a0250000 c78424a0250000bca90110 e8???????? 8b8c24046e0000 }
            // n = 4, score = 100
            //   8d8c24a0250000       | lea                 ecx, [esp + 0x25a0]
            //   c78424a0250000bca90110     | mov    dword ptr [esp + 0x25a0], 0x1001a9bc
            //   e8????????           |                     
            //   8b8c24046e0000       | mov                 ecx, dword ptr [esp + 0x6e04]

        $sequence_4 = { 6a64 668945e4 58 6a6c 668945e6 58 }
            // n = 6, score = 100
            //   6a64                 | push                0x64
            //   668945e4             | mov                 word ptr [ebp - 0x1c], ax
            //   58                   | pop                 eax
            //   6a6c                 | push                0x6c
            //   668945e6             | mov                 word ptr [ebp - 0x1a], ax
            //   58                   | pop                 eax

        $sequence_5 = { c6462008 c7462801000000 895630 895634 884623 }
            // n = 5, score = 100
            //   c6462008             | mov                 byte ptr [esi + 0x20], 8
            //   c7462801000000       | mov                 dword ptr [esi + 0x28], 1
            //   895630               | mov                 dword ptr [esi + 0x30], edx
            //   895634               | mov                 dword ptr [esi + 0x34], edx
            //   884623               | mov                 byte ptr [esi + 0x23], al

        $sequence_6 = { 8bf1 33c9 51 6880000000 6a03 }
            // n = 5, score = 100
            //   8bf1                 | mov                 esi, ecx
            //   33c9                 | xor                 ecx, ecx
            //   51                   | push                ecx
            //   6880000000           | push                0x80
            //   6a03                 | push                3

        $sequence_7 = { b9???????? 0f44c1 668975b8 50 ff7584 8d45b4 }
            // n = 6, score = 100
            //   b9????????           |                     
            //   0f44c1               | cmove               eax, ecx
            //   668975b8             | mov                 word ptr [ebp - 0x48], si
            //   50                   | push                eax
            //   ff7584               | push                dword ptr [ebp - 0x7c]
            //   8d45b4               | lea                 eax, [ebp - 0x4c]

        $sequence_8 = { 8db16c480000 56 ff15???????? 33c0 }
            // n = 4, score = 100
            //   8db16c480000         | lea                 esi, [ecx + 0x486c]
            //   56                   | push                esi
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax

        $sequence_9 = { 6a44 58 6a47 66898424686e0000 58 }
            // n = 5, score = 100
            //   6a44                 | push                0x44
            //   58                   | pop                 eax
            //   6a47                 | push                0x47
            //   66898424686e0000     | mov                 word ptr [esp + 0x6e68], ax
            //   58                   | pop                 eax

    condition:
        7 of them and filesize < 279552
}