rule win_taurus_stealer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.taurus_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.taurus_stealer"
        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 = { 7510 8b5644 8b0e e8???????? 57 e9???????? 8b8e60020000 }
            // n = 7, score = 200
            //   7510                 | jne                 0x12
            //   8b5644               | mov                 edx, dword ptr [esi + 0x44]
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   e8????????           |                     
            //   57                   | push                edi
            //   e9????????           |                     
            //   8b8e60020000         | mov                 ecx, dword ptr [esi + 0x260]

        $sequence_1 = { c745fb2e646c6c 885dff 8bcb 891e c7460401fa5607 0fbec0 250f000080 }
            // n = 7, score = 200
            //   c745fb2e646c6c       | mov                 dword ptr [ebp - 5], 0x6c6c642e
            //   885dff               | mov                 byte ptr [ebp - 1], bl
            //   8bcb                 | mov                 ecx, ebx
            //   891e                 | mov                 dword ptr [esi], ebx
            //   c7460401fa5607       | mov                 dword ptr [esi + 4], 0x756fa01
            //   0fbec0               | movsx               eax, al
            //   250f000080           | and                 eax, 0x8000000f

        $sequence_2 = { 8d84244c100000 50 8d8c246c110000 e8???????? 8d8c2460110000 e8???????? 0f2805???????? }
            // n = 7, score = 200
            //   8d84244c100000       | lea                 eax, [esp + 0x104c]
            //   50                   | push                eax
            //   8d8c246c110000       | lea                 ecx, [esp + 0x116c]
            //   e8????????           |                     
            //   8d8c2460110000       | lea                 ecx, [esp + 0x1160]
            //   e8????????           |                     
            //   0f2805????????       |                     

        $sequence_3 = { e8???????? 8d8dd8feffff e8???????? 43 899d68ffffff 3b9d6cffffff 0f8cdef9ffff }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8d8dd8feffff         | lea                 ecx, [ebp - 0x128]
            //   e8????????           |                     
            //   43                   | inc                 ebx
            //   899d68ffffff         | mov                 dword ptr [ebp - 0x98], ebx
            //   3b9d6cffffff         | cmp                 ebx, dword ptr [ebp - 0x94]
            //   0f8cdef9ffff         | jl                  0xfffff9e4

        $sequence_4 = { 8d45f4 50 e8???????? 50 8d45b8 50 e8???????? }
            // n = 7, score = 200
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   50                   | push                eax
            //   e8????????           |                     
            //   50                   | push                eax
            //   8d45b8               | lea                 eax, [ebp - 0x48]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_5 = { 66c745fa2900 8bcb 0fbec0 250f000080 7905 48 83c8f0 }
            // n = 7, score = 200
            //   66c745fa2900         | mov                 word ptr [ebp - 6], 0x29
            //   8bcb                 | mov                 ecx, ebx
            //   0fbec0               | movsx               eax, al
            //   250f000080           | and                 eax, 0x8000000f
            //   7905                 | jns                 7
            //   48                   | dec                 eax
            //   83c8f0               | or                  eax, 0xfffffff0

        $sequence_6 = { 8d8d60ffffff e8???????? 8d8d18ffffff e8???????? 8d8d00ffffff e8???????? }
            // n = 6, score = 200
            //   8d8d60ffffff         | lea                 ecx, [ebp - 0xa0]
            //   e8????????           |                     
            //   8d8d18ffffff         | lea                 ecx, [ebp - 0xe8]
            //   e8????????           |                     
            //   8d8d00ffffff         | lea                 ecx, [ebp - 0x100]
            //   e8????????           |                     

        $sequence_7 = { ffd0 85c0 0f8566020000 33db 895dd8 395dd0 0f8643020000 }
            // n = 7, score = 200
            //   ffd0                 | call                eax
            //   85c0                 | test                eax, eax
            //   0f8566020000         | jne                 0x26c
            //   33db                 | xor                 ebx, ebx
            //   895dd8               | mov                 dword ptr [ebp - 0x28], ebx
            //   395dd0               | cmp                 dword ptr [ebp - 0x30], ebx
            //   0f8643020000         | jbe                 0x249

        $sequence_8 = { c645b621 8855b7 66c745b8213c 885dba 304c05b1 40 83f809 }
            // n = 7, score = 200
            //   c645b621             | mov                 byte ptr [ebp - 0x4a], 0x21
            //   8855b7               | mov                 byte ptr [ebp - 0x49], dl
            //   66c745b8213c         | mov                 word ptr [ebp - 0x48], 0x3c21
            //   885dba               | mov                 byte ptr [ebp - 0x46], bl
            //   304c05b1             | xor                 byte ptr [ebp + eax - 0x4f], cl
            //   40                   | inc                 eax
            //   83f809               | cmp                 eax, 9

        $sequence_9 = { 8b4604 2b06 99 f7f9 8945e0 bfc3c3c303 3bc7 }
            // n = 7, score = 200
            //   8b4604               | mov                 eax, dword ptr [esi + 4]
            //   2b06                 | sub                 eax, dword ptr [esi]
            //   99                   | cdq                 
            //   f7f9                 | idiv                ecx
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   bfc3c3c303           | mov                 edi, 0x3c3c3c3
            //   3bc7                 | cmp                 eax, edi

    condition:
        7 of them and filesize < 524288
}