rule win_luca_stealer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.luca_stealer."
        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.luca_stealer"
        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 = { eb21 832300 488bce 488bd7 e8???????? 448bc8 4c8bc3 }
            // n = 7, score = 100
            //   eb21                 | dec                 ecx
            //   832300               | mov                 dword ptr [ebp + 0xb0], edi
            //   488bce               | dec                 ecx
            //   488bd7               | lea                 eax, [ebp + 0x860]
            //   e8????????           |                     
            //   448bc8               | dec                 eax
            //   4c8bc3               | mov                 dword ptr [esp + 0x38], eax

        $sequence_1 = { ff15???????? 488bf0 4885c0 744e 488b3d???????? 488bd8 eb39 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   488bf0               | test                ecx, ecx
            //   4885c0               | jne                 0x263
            //   744e                 | dec                 eax
            //   488b3d????????       |                     
            //   488bd8               | lea                 edx, [0x252ee2]
            //   eb39                 | dec                 esp

        $sequence_2 = { e9???????? 488d5c2440 4889d9 4c89fa 4d89f0 e8???????? 488b03 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   488d5c2440           | dec                 eax
            //   4889d9               | mov                 edi, dword ptr [esp + 0x68]
            //   4c89fa               | jne                 0x1e65
            //   4d89f0               | dec                 eax
            //   e8????????           |                     
            //   488b03               | lea                 eax, [esp + 0x70]

        $sequence_3 = { fe4330 4889d9 e8???????? 4889c6 48897c2460 4c89642468 0f28842410020000 }
            // n = 7, score = 100
            //   fe4330               | movaps              xmm0, xmmword ptr [esp + 0x40]
            //   4889d9               | movaps              xmmword ptr [esp + 0xc0], xmm0
            //   e8????????           |                     
            //   4889c6               | dec                 eax
            //   48897c2460           | mov                 eax, dword ptr [esp + 0x50]
            //   4c89642468           | dec                 eax
            //   0f28842410020000     | mov                 dword ptr [esp + 0xd0], eax

        $sequence_4 = { e8???????? ffc7 488d5b10 413b7e14 7cec 498bce e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   ffc7                 | dec                 ecx
            //   488d5b10             | add                 esi, 8
            //   413b7e14             | inc                 esp
            //   7cec                 | cmp                 edi, dword ptr [edi + 0x21c]
            //   498bce               | jl                  0xaa9
            //   e8????????           |                     

        $sequence_5 = { ff4024 488b0b 397924 7506 ff4128 488b0b 397920 }
            // n = 7, score = 100
            //   ff4024               | jmp                 0x177
            //   488b0b               | dec                 esp
            //   397924               | mov                 ecx, ebp
            //   7506                 | dec                 ebp
            //   ff4128               | mov                 eax, esp
            //   488b0b               | mov                 edx, 0x2c
            //   397920               | dec                 eax

        $sequence_6 = { e8???????? 4883655800 488b4510 8a8c2480000000 888c24b0000000 8b7c2470 488b5c2458 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   4883655800           | inc                 esp
            //   488b4510             | mov                 ecx, dword ptr [ebp - 0x40]
            //   8a8c2480000000       | dec                 eax
            //   888c24b0000000       | arpl                bx, ax
            //   8b7c2470             | dec                 ecx
            //   488b5c2458           | mov                 ebx, ebx

        $sequence_7 = { eb3f 4d85c9 7405 448b0a eb03 448bcb 488b4c2448 }
            // n = 7, score = 100
            //   eb3f                 | xor                 eax, eax
            //   4d85c9               | test                al, al
            //   7405                 | dec                 eax
            //   448b0a               | mov                 dword ptr [esp + 0x28], esi
            //   eb03                 | dec                 esp
            //   448bcb               | mov                 ecx, esp
            //   488b4c2448           | dec                 eax

        $sequence_8 = { f348a5 488d8c24400f0000 e8???????? 4c89ac24400f0000 b90f000000 488dbc24480f0000 4889ee }
            // n = 7, score = 100
            //   f348a5               | mov                 eax, dword ptr [edi + 0x98]
            //   488d8c24400f0000     | mov                 edx, dword ptr [ebp - 0x58]
            //   e8????????           |                     
            //   4c89ac24400f0000     | dec                 ecx
            //   b90f000000           | mov                 ecx, esi
            //   488dbc24480f0000     | inc                 ecx
            //   4889ee               | mov                 ebx, dword ptr [esi + 0x98]

        $sequence_9 = { eb07 c686b80100000b 33c0 488b9c2498000000 4883c450 415f 415e }
            // n = 7, score = 100
            //   eb07                 | inc                 ecx
            //   c686b80100000b       | pop                 esi
            //   33c0                 | pop                 edi
            //   488b9c2498000000     | pop                 esi
            //   4883c450             | dec                 eax
            //   415f                 | mov                 ebx, dword ptr [esp + 0x570]
            //   415e                 | dec                 eax

    condition:
        7 of them and filesize < 9285632
}