rule win_greenshaitan_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.greenshaitan."
        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.greenshaitan"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 50 8d442450 64a300000000 8b442460 33db bf0f000000 }
            // n = 6, score = 100
            //   50                   | push                eax
            //   8d442450             | lea                 eax, [esp + 0x50]
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   8b442460             | mov                 eax, dword ptr [esp + 0x60]
            //   33db                 | xor                 ebx, ebx
            //   bf0f000000           | mov                 edi, 0xf

        $sequence_1 = { 899f24010000 889f14010000 898750010000 899f4c010000 889f3c010000 89876c010000 899f68010000 }
            // n = 7, score = 100
            //   899f24010000         | mov                 dword ptr [edi + 0x124], ebx
            //   889f14010000         | mov                 byte ptr [edi + 0x114], bl
            //   898750010000         | mov                 dword ptr [edi + 0x150], eax
            //   899f4c010000         | mov                 dword ptr [edi + 0x14c], ebx
            //   889f3c010000         | mov                 byte ptr [edi + 0x13c], bl
            //   89876c010000         | mov                 dword ptr [edi + 0x16c], eax
            //   899f68010000         | mov                 dword ptr [edi + 0x168], ebx

        $sequence_2 = { 51 e8???????? 45 3b6c2410 0f8c4dffffff 5f 5e }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   e8????????           |                     
            //   45                   | inc                 ebp
            //   3b6c2410             | cmp                 ebp, dword ptr [esp + 0x10]
            //   0f8c4dffffff         | jl                  0xffffff53
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_3 = { e8???????? 8be8 896c2438 33f6 89b4249c000000 b807000000 33c9 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8be8                 | mov                 ebp, eax
            //   896c2438             | mov                 dword ptr [esp + 0x38], ebp
            //   33f6                 | xor                 esi, esi
            //   89b4249c000000       | mov                 dword ptr [esp + 0x9c], esi
            //   b807000000           | mov                 eax, 7
            //   33c9                 | xor                 ecx, ecx

        $sequence_4 = { 3bf2 7605 e8???????? 8b7b28 8bef 89742424 85ff }
            // n = 7, score = 100
            //   3bf2                 | cmp                 esi, edx
            //   7605                 | jbe                 7
            //   e8????????           |                     
            //   8b7b28               | mov                 edi, dword ptr [ebx + 0x28]
            //   8bef                 | mov                 ebp, edi
            //   89742424             | mov                 dword ptr [esp + 0x24], esi
            //   85ff                 | test                edi, edi

        $sequence_5 = { 8d44243c e8???????? 6aff 6a00 83c6f8 50 8d4e44 }
            // n = 7, score = 100
            //   8d44243c             | lea                 eax, [esp + 0x3c]
            //   e8????????           |                     
            //   6aff                 | push                -1
            //   6a00                 | push                0
            //   83c6f8               | add                 esi, -8
            //   50                   | push                eax
            //   8d4e44               | lea                 ecx, [esi + 0x44]

        $sequence_6 = { 7412 8b442424 55 57 6818040000 50 ff15???????? }
            // n = 7, score = 100
            //   7412                 | je                  0x14
            //   8b442424             | mov                 eax, dword ptr [esp + 0x24]
            //   55                   | push                ebp
            //   57                   | push                edi
            //   6818040000           | push                0x418
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_7 = { 8d8f80000000 895678 8b477c 51 8d8e80000000 89467c e8???????? }
            // n = 7, score = 100
            //   8d8f80000000         | lea                 ecx, [edi + 0x80]
            //   895678               | mov                 dword ptr [esi + 0x78], edx
            //   8b477c               | mov                 eax, dword ptr [edi + 0x7c]
            //   51                   | push                ecx
            //   8d8e80000000         | lea                 ecx, [esi + 0x80]
            //   89467c               | mov                 dword ptr [esi + 0x7c], eax
            //   e8????????           |                     

        $sequence_8 = { e8???????? 6aff 6a00 c747180f000000 c7471400000000 50 8bcf }
            // n = 7, score = 100
            //   e8????????           |                     
            //   6aff                 | push                -1
            //   6a00                 | push                0
            //   c747180f000000       | mov                 dword ptr [edi + 0x18], 0xf
            //   c7471400000000       | mov                 dword ptr [edi + 0x14], 0
            //   50                   | push                eax
            //   8bcf                 | mov                 ecx, edi

        $sequence_9 = { 8b842484000000 c74424640f000000 895c2460 885c2450 895c2474 3bc3 }
            // n = 6, score = 100
            //   8b842484000000       | mov                 eax, dword ptr [esp + 0x84]
            //   c74424640f000000     | mov                 dword ptr [esp + 0x64], 0xf
            //   895c2460             | mov                 dword ptr [esp + 0x60], ebx
            //   885c2450             | mov                 byte ptr [esp + 0x50], bl
            //   895c2474             | mov                 dword ptr [esp + 0x74], ebx
            //   3bc3                 | cmp                 eax, ebx

    condition:
        7 of them and filesize < 253952
}