rule win_unidentified_020_cia_vault7_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.unidentified_020_cia_vault7."
        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.unidentified_020_cia_vault7"
        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 = { ebda 8bc3 c1f805 8d3c8520834100 8bf3 83e61f c1e606 }
            // n = 7, score = 200
            //   ebda                 | jmp                 0xffffffdc
            //   8bc3                 | mov                 eax, ebx
            //   c1f805               | sar                 eax, 5
            //   8d3c8520834100       | lea                 edi, [eax*4 + 0x418320]
            //   8bf3                 | mov                 esi, ebx
            //   83e61f               | and                 esi, 0x1f
            //   c1e606               | shl                 esi, 6

        $sequence_1 = { 89460c 8d7803 8d642400 a1???????? }
            // n = 4, score = 200
            //   89460c               | mov                 dword ptr [esi + 0xc], eax
            //   8d7803               | lea                 edi, [eax + 3]
            //   8d642400             | lea                 esp, [esp]
            //   a1????????           |                     

        $sequence_2 = { 8945c4 8975b8 c745d401000000 8930 ff15???????? }
            // n = 5, score = 200
            //   8945c4               | mov                 dword ptr [ebp - 0x3c], eax
            //   8975b8               | mov                 dword ptr [ebp - 0x48], esi
            //   c745d401000000       | mov                 dword ptr [ebp - 0x2c], 1
            //   8930                 | mov                 dword ptr [eax], esi
            //   ff15????????         |                     

        $sequence_3 = { 57 81faffff0000 7657 8b7e20 8b4624 03c1 33db }
            // n = 7, score = 200
            //   57                   | push                edi
            //   81faffff0000         | cmp                 edx, 0xffff
            //   7657                 | jbe                 0x59
            //   8b7e20               | mov                 edi, dword ptr [esi + 0x20]
            //   8b4624               | mov                 eax, dword ptr [esi + 0x24]
            //   03c1                 | add                 eax, ecx
            //   33db                 | xor                 ebx, ebx

        $sequence_4 = { 8b45c4 8938 85ff 7521 c745d400000000 8b0b 51 }
            // n = 7, score = 200
            //   8b45c4               | mov                 eax, dword ptr [ebp - 0x3c]
            //   8938                 | mov                 dword ptr [eax], edi
            //   85ff                 | test                edi, edi
            //   7521                 | jne                 0x23
            //   c745d400000000       | mov                 dword ptr [ebp - 0x2c], 0
            //   8b0b                 | mov                 ecx, dword ptr [ebx]
            //   51                   | push                ecx

        $sequence_5 = { c686c800000043 c6864b01000043 c7466810404100 6a0d e8???????? }
            // n = 5, score = 200
            //   c686c800000043       | mov                 byte ptr [esi + 0xc8], 0x43
            //   c6864b01000043       | mov                 byte ptr [esi + 0x14b], 0x43
            //   c7466810404100       | mov                 dword ptr [esi + 0x68], 0x414010
            //   6a0d                 | push                0xd
            //   e8????????           |                     

        $sequence_6 = { 56 8bf0 8b06 57 c745fc01000000 83f801 7526 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   8bf0                 | mov                 esi, eax
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   57                   | push                edi
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1
            //   83f801               | cmp                 eax, 1
            //   7526                 | jne                 0x28

        $sequence_7 = { 57 6804010000 68???????? e8???????? 83c408 85c0 }
            // n = 6, score = 200
            //   57                   | push                edi
            //   6804010000           | push                0x104
            //   68????????           |                     
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax

        $sequence_8 = { 51 ffd0 33d2 6806020000 52 8d85f6fdffff 50 }
            // n = 7, score = 200
            //   51                   | push                ecx
            //   ffd0                 | call                eax
            //   33d2                 | xor                 edx, edx
            //   6806020000           | push                0x206
            //   52                   | push                edx
            //   8d85f6fdffff         | lea                 eax, [ebp - 0x20a]
            //   50                   | push                eax

        $sequence_9 = { 750a e8???????? 33ff 47 }
            // n = 4, score = 200
            //   750a                 | jne                 0xc
            //   e8????????           |                     
            //   33ff                 | xor                 edi, edi
            //   47                   | inc                 edi

    condition:
        7 of them and filesize < 253952
}