rule win_mydoom_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.mydoom"
        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 = { 89442404 891c24 e8???????? 85c0 0f849f000000 }
            // n = 5, score = 100
            //   89442404             | mov                 dword ptr [esp + 4], eax
            //   891c24               | mov                 dword ptr [esp], ebx
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f849f000000         | je                  0xa5

        $sequence_1 = { 89442408 c7442404???????? 891c24 e8???????? ba00000000 85c0 }
            // n = 6, score = 100
            //   89442408             | mov                 dword ptr [esp + 8], eax
            //   c7442404????????     |                     
            //   891c24               | mov                 dword ptr [esp], ebx
            //   e8????????           |                     
            //   ba00000000           | mov                 edx, 0
            //   85c0                 | test                eax, eax

        $sequence_2 = { 893424 e8???????? ba00000000 e9???????? 8b420c 8b00 8b00 }
            // n = 7, score = 100
            //   893424               | mov                 dword ptr [esp], esi
            //   e8????????           |                     
            //   ba00000000           | mov                 edx, 0
            //   e9????????           |                     
            //   8b420c               | mov                 eax, dword ptr [edx + 0xc]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8b00                 | mov                 eax, dword ptr [eax]

        $sequence_3 = { 83ec18 c744241400000000 c744241000000000 8b450c 8944240c 8b4508 89442408 }
            // n = 7, score = 100
            //   83ec18               | sub                 esp, 0x18
            //   c744241400000000     | mov                 dword ptr [esp + 0x14], 0
            //   c744241000000000     | mov                 dword ptr [esp + 0x10], 0
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   8944240c             | mov                 dword ptr [esp + 0xc], eax
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   89442408             | mov                 dword ptr [esp + 8], eax

        $sequence_4 = { c744240400000000 c7042400000000 e8???????? 83ec18 8d45fc 89442414 c744241000000000 }
            // n = 7, score = 100
            //   c744240400000000     | mov                 dword ptr [esp + 4], 0
            //   c7042400000000       | mov                 dword ptr [esp], 0
            //   e8????????           |                     
            //   83ec18               | sub                 esp, 0x18
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   89442414             | mov                 dword ptr [esp + 0x14], eax
            //   c744241000000000     | mov                 dword ptr [esp + 0x10], 0

        $sequence_5 = { 55 89e5 83ec08 e8???????? e8???????? e8???????? b800000000 }
            // n = 7, score = 100
            //   55                   | push                ebp
            //   89e5                 | mov                 ebp, esp
            //   83ec08               | sub                 esp, 8
            //   e8????????           |                     
            //   e8????????           |                     
            //   e8????????           |                     
            //   b800000000           | mov                 eax, 0

        $sequence_6 = { 83ec58 895df4 8975f8 897dfc 8b7510 0fb74514 668945e6 }
            // n = 7, score = 100
            //   83ec58               | sub                 esp, 0x58
            //   895df4               | mov                 dword ptr [ebp - 0xc], ebx
            //   8975f8               | mov                 dword ptr [ebp - 8], esi
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   8b7510               | mov                 esi, dword ptr [ebp + 0x10]
            //   0fb74514             | movzx               eax, word ptr [ebp + 0x14]
            //   668945e6             | mov                 word ptr [ebp - 0x1a], ax

        $sequence_7 = { 8845d2 8d45d8 890424 e8???????? 83ec04 e8???????? }
            // n = 6, score = 100
            //   8845d2               | mov                 byte ptr [ebp - 0x2e], al
            //   8d45d8               | lea                 eax, [ebp - 0x28]
            //   890424               | mov                 dword ptr [esp], eax
            //   e8????????           |                     
            //   83ec04               | sub                 esp, 4
            //   e8????????           |                     

        $sequence_8 = { 895df4 8975f8 897dfc 8b7d08 8b750c c645f3ff c744240802000000 }
            // n = 7, score = 100
            //   895df4               | mov                 dword ptr [ebp - 0xc], ebx
            //   8975f8               | mov                 dword ptr [ebp - 8], esi
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   8b750c               | mov                 esi, dword ptr [ebp + 0xc]
            //   c645f3ff             | mov                 byte ptr [ebp - 0xd], 0xff
            //   c744240802000000     | mov                 dword ptr [esp + 8], 2

        $sequence_9 = { 89c6 83f8ff 0f8472010000 8dbdf8feffff fc bb00000000 b904000000 }
            // n = 7, score = 100
            //   89c6                 | mov                 esi, eax
            //   83f8ff               | cmp                 eax, -1
            //   0f8472010000         | je                  0x178
            //   8dbdf8feffff         | lea                 edi, [ebp - 0x108]
            //   fc                   | cld                 
            //   bb00000000           | mov                 ebx, 0
            //   b904000000           | mov                 ecx, 4

    condition:
        7 of them and filesize < 114688
}