rule win_shadowhammer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.shadowhammer"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 685ac1cbc2 56 e8???????? 59 59 85c0 7420 }
            // n = 7, score = 100
            //   685ac1cbc2           | push                0xc2cbc15a
            //   56                   | push                esi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   85c0                 | test                eax, eax
            //   7420                 | je                  0x22

        $sequence_1 = { 68d0884000 e8???????? 8d4598 50 }
            // n = 4, score = 100
            //   68d0884000           | push                0x4088d0
            //   e8????????           |                     
            //   8d4598               | lea                 eax, [ebp - 0x68]
            //   50                   | push                eax

        $sequence_2 = { c745e403000000 c745e801000000 c745ec04000000 c78558ffffff6b006500 c7855cffffff72006e00 }
            // n = 5, score = 100
            //   c745e403000000       | mov                 dword ptr [ebp - 0x1c], 3
            //   c745e801000000       | mov                 dword ptr [ebp - 0x18], 1
            //   c745ec04000000       | mov                 dword ptr [ebp - 0x14], 4
            //   c78558ffffff6b006500     | mov    dword ptr [ebp - 0xa8], 0x65006b
            //   c7855cffffff72006e00     | mov    dword ptr [ebp - 0xa4], 0x6e0072

        $sequence_3 = { 7642 6a2c 8d85b4fcffff 53 50 ff5624 }
            // n = 6, score = 100
            //   7642                 | jbe                 0x44
            //   6a2c                 | push                0x2c
            //   8d85b4fcffff         | lea                 eax, [ebp - 0x34c]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   ff5624               | call                dword ptr [esi + 0x24]

        $sequence_4 = { 3d01010000 7d0d 8a4c181c 888838954000 40 ebe9 }
            // n = 6, score = 100
            //   3d01010000           | cmp                 eax, 0x101
            //   7d0d                 | jge                 0xf
            //   8a4c181c             | mov                 cl, byte ptr [eax + ebx + 0x1c]
            //   888838954000         | mov                 byte ptr [eax + 0x409538], cl
            //   40                   | inc                 eax
            //   ebe9                 | jmp                 0xffffffeb

        $sequence_5 = { ff75f8 ff561c 83c40c ff45f4 }
            // n = 4, score = 100
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff561c               | call                dword ptr [esi + 0x1c]
            //   83c40c               | add                 esp, 0xc
            //   ff45f4               | inc                 dword ptr [ebp - 0xc]

        $sequence_6 = { 8a8044974000 08443b1d 0fb64601 47 3bf8 76ea 8b7d08 }
            // n = 7, score = 100
            //   8a8044974000         | mov                 al, byte ptr [eax + 0x409744]
            //   08443b1d             | or                  byte ptr [ebx + edi + 0x1d], al
            //   0fb64601             | movzx               eax, byte ptr [esi + 1]
            //   47                   | inc                 edi
            //   3bf8                 | cmp                 edi, eax
            //   76ea                 | jbe                 0xffffffec
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]

        $sequence_7 = { ab ab ab 66ab aa 898d64fdffff }
            // n = 6, score = 100
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al
            //   898d64fdffff         | mov                 dword ptr [ebp - 0x29c], ecx

        $sequence_8 = { 6a64 6689458c 58 66897dce }
            // n = 4, score = 100
            //   6a64                 | push                0x64
            //   6689458c             | mov                 word ptr [ebp - 0x74], ax
            //   58                   | pop                 eax
            //   66897dce             | mov                 word ptr [ebp - 0x32], di

        $sequence_9 = { 8945a8 8d8574ffffff 33ff 8945ac 8d45b8 }
            // n = 5, score = 100
            //   8945a8               | mov                 dword ptr [ebp - 0x58], eax
            //   8d8574ffffff         | lea                 eax, [ebp - 0x8c]
            //   33ff                 | xor                 edi, edi
            //   8945ac               | mov                 dword ptr [ebp - 0x54], eax
            //   8d45b8               | lea                 eax, [ebp - 0x48]

    condition:
        7 of them and filesize < 49152
}