rule win_tiny_turla_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.tiny_turla."
        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.tiny_turla"
        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 = { 488b1a 488d15e0ffffff 488bcb ff15???????? }
            // n = 4, score = 300
            //   488b1a               | jle                 0x7f3
            //   488d15e0ffffff       | or                  eax, 0xffffffff
            //   488bcb               | jmp                 0x879
            //   ff15????????         |                     

        $sequence_1 = { 4883ec20 488b1a 488d15e0ffffff 488bcb ff15???????? 488905???????? }
            // n = 6, score = 300
            //   4883ec20             | inc                 ebp
            //   488b1a               | xor                 ecx, ecx
            //   488d15e0ffffff       | dec                 esp
            //   488bcb               | mov                 dword ptr [esp + 0x58], esp
            //   ff15????????         |                     
            //   488905????????       |                     

        $sequence_2 = { 4053 4883ec20 488b1a 488d15e0ffffff 488bcb ff15???????? }
            // n = 6, score = 300
            //   4053                 | dec                 eax
            //   4883ec20             | sub                 esp, 0x20
            //   488b1a               | mov                 eax, dword ptr [ecx + 8]
            //   488d15e0ffffff       | dec                 eax
            //   488bcb               | mov                 ebx, ecx
            //   ff15????????         |                     

        $sequence_3 = { c705????????01000000 4883c420 5b 48ff25???????? 4883c420 }
            // n = 5, score = 300
            //   c705????????01000000     |     
            //   4883c420             | dec                 eax
            //   5b                   | add                 eax, 0x24
            //   48ff25????????       |                     
            //   4883c420             | dec                 eax

        $sequence_4 = { c705????????04000000 488bc8 ff15???????? 85c0 742c 488bcb }
            // n = 6, score = 300
            //   c705????????04000000     |     
            //   488bc8               | shl                 ebp, 6
            //   ff15????????         |                     
            //   85c0                 | dec                 eax
            //   742c                 | lea                 ecx, [0xe5ca]
            //   488bcb               | dec                 eax

        $sequence_5 = { 488b1a 488d15e0ffffff 488bcb ff15???????? 488905???????? }
            // n = 5, score = 300
            //   488b1a               | inc                 ebp
            //   488d15e0ffffff       | xor                 eax, eax
            //   488bcb               | inc                 eax
            //   ff15????????         |                     
            //   488905????????       |                     

        $sequence_6 = { 488d15e0ffffff 488bcb ff15???????? 488905???????? }
            // n = 4, score = 300
            //   488d15e0ffffff       | je                  0x605
            //   488bcb               | dec                 eax
            //   ff15????????         |                     
            //   488905????????       |                     

        $sequence_7 = { 4883ec20 488b1a 488d15e0ffffff 488bcb ff15???????? 488905???????? 4885c0 }
            // n = 7, score = 300
            //   4883ec20             | dec                 eax
            //   488b1a               | mov                 edx, dword ptr [esi]
            //   488d15e0ffffff       | dec                 esp
            //   488bcb               | lea                 eax, [esp + 0x160]
            //   ff15????????         |                     
            //   488905????????       |                     
            //   4885c0               | mov                 ecx, 7

        $sequence_8 = { 488bc8 ff15???????? 85c0 742c 488bcb e8???????? }
            // n = 6, score = 300
            //   488bc8               | mov                 dword ptr [ebx + 8], edi
            //   ff15????????         |                     
            //   85c0                 | dec                 eax
            //   742c                 | mov                 eax, dword ptr [ebx]
            //   488bcb               | xor                 ecx, ecx
            //   e8????????           |                     

        $sequence_9 = { 488b1a 488d15e0ffffff 488bcb ff15???????? 488905???????? 4885c0 744a }
            // n = 7, score = 300
            //   488b1a               | mov                 edi, dword ptr [ebp - 0x20]
            //   488d15e0ffffff       | dec                 ecx
            //   488bcb               | cmp                 edi, edi
            //   ff15????????         |                     
            //   488905????????       |                     
            //   4885c0               | jae                 0x54e
            //   744a                 | mov                 al, byte ptr [edi]

    condition:
        7 of them and filesize < 217088
}