rule win_grimplant_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.grimplant."
        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.grimplant"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { e8???????? 0fb6542469 4c8b542460 4a8d0412 488b4c2478 4839c1 7279 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   0fb6542469           | mov                 ecx, eax
            //   4c8b542460           | dec                 eax
            //   4a8d0412             | mov                 eax, ebx
            //   488b4c2478           | dec                 eax
            //   4839c1               | mov                 ebx, edx
            //   7279                 | dec                 eax

        $sequence_1 = { eb03 4c89d6 4d85c9 0f868f010000 488b7c2468 4989fa 48c1ff08 }
            // n = 7, score = 100
            //   eb03                 | mov                 eax, dword ptr [esp + 0x58]
            //   4c89d6               | dec                 esp
            //   4d85c9               | mov                 esi, eax
            //   0f868f010000         | dec                 eax
            //   488b7c2468           | mov                 dword ptr [esp + 0x80], ecx
            //   4989fa               | dec                 eax
            //   48c1ff08             | mov                 dword ptr [esp + 0x88], esi

        $sequence_2 = { eb11 488d7818 488b8c24180d0000 e8???????? 48c740081a000000 488d0d99db0f00 488908 }
            // n = 7, score = 100
            //   eb11                 | mov                 dword ptr [esp + 0x38], eax
            //   488d7818             | dec                 eax
            //   488b8c24180d0000     | mov                 eax, dword ptr [edx + 0x90]
            //   e8????????           |                     
            //   48c740081a000000     | dec                 eax
            //   488d0d99db0f00       | mov                 edx, dword ptr [edx + 0x98]
            //   488908               | dec                 ecx

        $sequence_3 = { f7d8 31d2 418d1404 31c0 e9???????? 448d24d2 83fada }
            // n = 7, score = 100
            //   f7d8                 | lea                 eax, [0x1ac804]
            //   31d2                 | dec                 eax
            //   418d1404             | lea                 ebx, [0x2f9e2d]
            //   31c0                 | dec                 eax
            //   e9????????           |                     
            //   448d24d2             | mov                 eax, dword ptr [esp + 0x48]
            //   83fada               | dec                 eax

        $sequence_4 = { eb0c 488d3d6b237f00 e8???????? 488b6c2438 4883c440 c3 0f1f4000 }
            // n = 7, score = 100
            //   eb0c                 | dec                 eax
            //   488d3d6b237f00       | mov                 dword ptr [esp + 0x30], ecx
            //   e8????????           |                     
            //   488b6c2438           | dec                 eax
            //   4883c440             | lea                 eax, [0x449c16]
            //   c3                   | jne                 0x1ae6
            //   0f1f4000             | dec                 eax

        $sequence_5 = { e9???????? 488b942410010000 4885d2 488bb424b8000000 4889d7 4c8b842488000000 4c8b8c2480000000 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   488b942410010000     | mov                 edi, eax
            //   4885d2               | dec                 ecx
            //   488bb424b8000000     | mov                 ecx, edx
            //   4889d7               | dec                 eax
            //   4c8b842488000000     | mov                 eax, edi
            //   4c8b8c2480000000     | dec                 esp

        $sequence_6 = { e9???????? e8???????? 488b6c2458 4883c460 c3 4889442408 48895c2410 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   e8????????           |                     
            //   488b6c2458           | dec                 eax
            //   4883c460             | lea                 esi, [ecx + 1]
            //   c3                   | dec                 eax
            //   4889442408           | mov                 dword ptr [edx + 8], esi
            //   48895c2410           | dec                 eax

        $sequence_7 = { eb3c 4889c3 488d05744b4400 e8???????? 488b7c2420 488b442438 0f1f440000 }
            // n = 7, score = 100
            //   eb3c                 | mov                 ecx, ebx
            //   4889c3               | dec                 eax
            //   488d05744b4400       | lea                 ebx, [0x3ddb3a]
            //   e8????????           |                     
            //   488b7c2420           | dec                 eax
            //   488b442438           | mov                 eax, dword ptr [esp + 0x20]
            //   0f1f440000           | dec                 eax

        $sequence_8 = { e9???????? c78040010000ffffffff 833d????????00 7509 488905???????? eb0c 488d3d01ab7900 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   c78040010000ffffffff     | add    esp, 0x20
            //   833d????????00       |                     
            //   7509                 | ret                 
            //   488905????????       |                     
            //   eb0c                 | nop                 
            //   488d3d01ab7900       | dec                 eax

        $sequence_9 = { e9???????? 4885c9 7e72 488b942490000000 4c8b12 488bb424c8000000 8406 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   4885c9               | mov                 edi, ecx
            //   7e72                 | nop                 
            //   488b942490000000     | dec                 eax
            //   4c8b12               | mov                 edx, dword ptr [esp + 0x198]
            //   488bb424c8000000     | dec                 eax
            //   8406                 | mov                 ebx, dword ptr [edx + 0x48]

    condition:
        7 of them and filesize < 19940352
}