rule win_shadowhammer_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.shadowhammer"
        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 = { c745a409da9df3 c745a8a050afad c745ac0df0ef96 c745b03b41b6e2 33c0 }
            // n = 5, score = 100
            //   c745a409da9df3       | mov                 dword ptr [ebp - 0x5c], 0xf39dda09
            //   c745a8a050afad       | mov                 dword ptr [ebp - 0x58], 0xadaf50a0
            //   c745ac0df0ef96       | mov                 dword ptr [ebp - 0x54], 0x96eff00d
            //   c745b03b41b6e2       | mov                 dword ptr [ebp - 0x50], 0xe2b6413b
            //   33c0                 | xor                 eax, eax

        $sequence_1 = { 3bfe 72f1 833d????????00 5f 5e 741b 68b4a84000 }
            // n = 7, score = 100
            //   3bfe                 | cmp                 edi, esi
            //   72f1                 | jb                  0xfffffff3
            //   833d????????00       |                     
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   741b                 | je                  0x1d
            //   68b4a84000           | push                0x40a8b4

        $sequence_2 = { c3 6a20 68f0884000 e8???????? 6a08 }
            // n = 5, score = 100
            //   c3                   | ret                 
            //   6a20                 | push                0x20
            //   68f0884000           | push                0x4088f0
            //   e8????????           |                     
            //   6a08                 | push                8

        $sequence_3 = { 83c104 2bc1 8945f4 eb03 8b45f4 ff3430 }
            // n = 6, score = 100
            //   83c104               | add                 ecx, 4
            //   2bc1                 | sub                 eax, ecx
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   eb03                 | jmp                 5
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   ff3430               | push                dword ptr [eax + esi]

        $sequence_4 = { 68287c4000 57 ffd6 681c7c4000 57 a3???????? ffd6 }
            // n = 7, score = 100
            //   68287c4000           | push                0x407c28
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   681c7c4000           | push                0x407c1c
            //   57                   | push                edi
            //   a3????????           |                     
            //   ffd6                 | call                esi

        $sequence_5 = { 752c 57 8d8530fbffff 50 8d8538fdffff 50 }
            // n = 6, score = 100
            //   752c                 | jne                 0x2e
            //   57                   | push                edi
            //   8d8530fbffff         | lea                 eax, [ebp - 0x4d0]
            //   50                   | push                eax
            //   8d8538fdffff         | lea                 eax, [ebp - 0x2c8]
            //   50                   | push                eax

        $sequence_6 = { 33c0 ebf7 55 8bec 83ec78 53 }
            // n = 6, score = 100
            //   33c0                 | xor                 eax, eax
            //   ebf7                 | jmp                 0xfffffff9
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   83ec78               | sub                 esp, 0x78
            //   53                   | push                ebx

        $sequence_7 = { 6800100000 ff75fc 53 ff5604 8bf8 }
            // n = 5, score = 100
            //   6800100000           | push                0x1000
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   53                   | push                ebx
            //   ff5604               | call                dword ptr [esi + 4]
            //   8bf8                 | mov                 edi, eax

        $sequence_8 = { 8d4588 50 ff5634 6a06 }
            // n = 4, score = 100
            //   8d4588               | lea                 eax, [ebp - 0x78]
            //   50                   | push                eax
            //   ff5634               | call                dword ptr [esi + 0x34]
            //   6a06                 | push                6

        $sequence_9 = { be50904000 57 8b3e 85ff }
            // n = 4, score = 100
            //   be50904000           | mov                 esi, 0x409050
            //   57                   | push                edi
            //   8b3e                 | mov                 edi, dword ptr [esi]
            //   85ff                 | test                edi, edi

    condition:
        7 of them and filesize < 49152
}