rule win_tuoni_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.tuoni."
        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.tuoni"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 8b4508 8bc8 83e03f c1f906 6bd038 8b0c8d30464500 }
            // n = 6, score = 100
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8bc8                 | mov                 ecx, eax
            //   83e03f               | and                 eax, 0x3f
            //   c1f906               | sar                 ecx, 6
            //   6bd038               | imul                edx, eax, 0x38
            //   8b0c8d30464500       | mov                 ecx, dword ptr [ecx*4 + 0x454630]

        $sequence_1 = { e9???????? 8b4330 8b4804 894dcc 8b01 ff5004 8365fc00 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8b4330               | mov                 eax, dword ptr [ebx + 0x30]
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   894dcc               | mov                 dword ptr [ebp - 0x34], ecx
            //   8b01                 | mov                 eax, dword ptr [ecx]
            //   ff5004               | call                dword ptr [eax + 4]
            //   8365fc00             | and                 dword ptr [ebp - 4], 0

        $sequence_2 = { 8d45f4 64a300000000 894df0 8b8578040000 8b3d???????? 894548 }
            // n = 6, score = 100
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   894df0               | mov                 dword ptr [ebp - 0x10], ecx
            //   8b8578040000         | mov                 eax, dword ptr [ebp + 0x478]
            //   8b3d????????         |                     
            //   894548               | mov                 dword ptr [ebp + 0x48], eax

        $sequence_3 = { 59 8945e4 c645fc04 85c0 7416 6a40 56 }
            // n = 7, score = 100
            //   59                   | pop                 ecx
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   c645fc04             | mov                 byte ptr [ebp - 4], 4
            //   85c0                 | test                eax, eax
            //   7416                 | je                  0x18
            //   6a40                 | push                0x40
            //   56                   | push                esi

        $sequence_4 = { 53 ff7500 85c0 7515 e8???????? 59 59 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   ff7500               | push                dword ptr [ebp]
            //   85c0                 | test                eax, eax
            //   7515                 | jne                 0x17
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx

        $sequence_5 = { 7510 6a01 ff15???????? 6a01 ff15???????? 8d45e0 50 }
            // n = 7, score = 100
            //   7510                 | jne                 0x12
            //   6a01                 | push                1
            //   ff15????????         |                     
            //   6a01                 | push                1
            //   ff15????????         |                     
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   50                   | push                eax

        $sequence_6 = { 7443 ff750c 8d4df8 56 e8???????? 8b45fc ff4604 }
            // n = 7, score = 100
            //   7443                 | je                  0x45
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   8d4df8               | lea                 ecx, [ebp - 8]
            //   56                   | push                esi
            //   e8????????           |                     
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   ff4604               | inc                 dword ptr [esi + 4]

        $sequence_7 = { e8???????? 83ec18 c745fc01000000 8d4520 8965f0 8bcc 50 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83ec18               | sub                 esp, 0x18
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1
            //   8d4520               | lea                 eax, [ebp + 0x20]
            //   8965f0               | mov                 dword ptr [ebp - 0x10], esp
            //   8bcc                 | mov                 ecx, esp
            //   50                   | push                eax

        $sequence_8 = { 66894608 895e20 895dfc 895e24 8d4e28 c645fc01 e8???????? }
            // n = 7, score = 100
            //   66894608             | mov                 word ptr [esi + 8], ax
            //   895e20               | mov                 dword ptr [esi + 0x20], ebx
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   895e24               | mov                 dword ptr [esi + 0x24], ebx
            //   8d4e28               | lea                 ecx, [esi + 0x28]
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   e8????????           |                     

        $sequence_9 = { 031c8d30464500 eb0c 8bc8 8bd0 c1f906 8bdf 83e23f }
            // n = 7, score = 100
            //   031c8d30464500       | add                 ebx, dword ptr [ecx*4 + 0x454630]
            //   eb0c                 | jmp                 0xe
            //   8bc8                 | mov                 ecx, eax
            //   8bd0                 | mov                 edx, eax
            //   c1f906               | sar                 ecx, 6
            //   8bdf                 | mov                 ebx, edi
            //   83e23f               | and                 edx, 0x3f

    condition:
        7 of them and filesize < 734208
}