rule win_sepulcher_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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 = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 8d85fafdffff 6a00 50 e8???????? 6a25 5a 6a73 }
            // n = 7, score = 100
            //   8d85fafdffff         | lea                 eax, [ebp - 0x206]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   6a25                 | push                0x25
            //   5a                   | pop                 edx
            //   6a73                 | push                0x73

        $sequence_1 = { 8945f8 53 56 57 bf98250000 8d450c 57 }
            // n = 7, score = 100
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   bf98250000           | mov                 edi, 0x2598
            //   8d450c               | lea                 eax, [ebp + 0xc]
            //   57                   | push                edi

        $sequence_2 = { 51 ffb558daffff 56 50 ff15???????? }
            // n = 5, score = 100
            //   51                   | push                ecx
            //   ffb558daffff         | push                dword ptr [ebp - 0x25a8]
            //   56                   | push                esi
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_3 = { 33c0 898f80480000 40 5f 5e 5b 8be5 }
            // n = 7, score = 100
            //   33c0                 | xor                 eax, eax
            //   898f80480000         | mov                 dword ptr [edi + 0x4880], ecx
            //   40                   | inc                 eax
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   8be5                 | mov                 esp, ebp

        $sequence_4 = { 7432 ba80000000 663bc2 7428 ba00010000 663bc2 741e }
            // n = 7, score = 100
            //   7432                 | je                  0x34
            //   ba80000000           | mov                 edx, 0x80
            //   663bc2               | cmp                 ax, dx
            //   7428                 | je                  0x2a
            //   ba00010000           | mov                 edx, 0x100
            //   663bc2               | cmp                 ax, dx
            //   741e                 | je                  0x20

        $sequence_5 = { 8d4598 50 ff15???????? 8b45a0 33c9 894610 8b45a4 }
            // n = 7, score = 100
            //   8d4598               | lea                 eax, [ebp - 0x68]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b45a0               | mov                 eax, dword ptr [ebp - 0x60]
            //   33c9                 | xor                 ecx, ecx
            //   894610               | mov                 dword ptr [esi + 0x10], eax
            //   8b45a4               | mov                 eax, dword ptr [ebp - 0x5c]

        $sequence_6 = { 51 e8???????? 59 8bf8 8d4594 50 57 }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8bf8                 | mov                 edi, eax
            //   8d4594               | lea                 eax, [ebp - 0x6c]
            //   50                   | push                eax
            //   57                   | push                edi

        $sequence_7 = { f3ab 6a10 59 be???????? 66ab 33c0 }
            // n = 6, score = 100
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   6a10                 | push                0x10
            //   59                   | pop                 ecx
            //   be????????           |                     
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   33c0                 | xor                 eax, eax

        $sequence_8 = { 897de4 8365fc00 8b049d50de0110 8b4de0 f644082801 }
            // n = 5, score = 100
            //   897de4               | mov                 dword ptr [ebp - 0x1c], edi
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   8b049d50de0110       | mov                 eax, dword ptr [ebx*4 + 0x1001de50]
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]
            //   f644082801           | test                byte ptr [eax + ecx + 0x28], 1

        $sequence_9 = { e8???????? 85c0 7446 8b06 832600 058fe8ffff 83f816 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7446                 | je                  0x48
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   832600               | and                 dword ptr [esi], 0
            //   058fe8ffff           | add                 eax, 0xffffe88f
            //   83f816               | cmp                 eax, 0x16

    condition:
        7 of them and filesize < 279552
}