rule win_vsingle_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.vsingle."
        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.vsingle"
        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 = { 8945fc 56 57 c6850cffffff00 68ef000000 6a00 8d850dffffff }
            // n = 7, score = 700
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   56                   | push                esi
            //   57                   | push                edi
            //   c6850cffffff00       | mov                 byte ptr [ebp - 0xf4], 0
            //   68ef000000           | push                0xef
            //   6a00                 | push                0
            //   8d850dffffff         | lea                 eax, [ebp - 0xf3]

        $sequence_1 = { 8955c5 8955c9 668955cd 8855cf c645d000 33c0 }
            // n = 6, score = 700
            //   8955c5               | mov                 dword ptr [ebp - 0x3b], edx
            //   8955c9               | mov                 dword ptr [ebp - 0x37], edx
            //   668955cd             | mov                 word ptr [ebp - 0x33], dx
            //   8855cf               | mov                 byte ptr [ebp - 0x31], dl
            //   c645d000             | mov                 byte ptr [ebp - 0x30], 0
            //   33c0                 | xor                 eax, eax

        $sequence_2 = { 51 ff15???????? 8b5508 52 ff15???????? 83c001 }
            // n = 6, score = 700
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   52                   | push                edx
            //   ff15????????         |                     
            //   83c001               | add                 eax, 1

        $sequence_3 = { 33c0 668985d4f6ffff 68fe070000 6a00 }
            // n = 4, score = 700
            //   33c0                 | xor                 eax, eax
            //   668985d4f6ffff       | mov                 word ptr [ebp - 0x92c], ax
            //   68fe070000           | push                0x7fe
            //   6a00                 | push                0

        $sequence_4 = { 8945fc 64a130000000 8945f8 8b45f8 8b4dfc 33cd e8???????? }
            // n = 7, score = 700
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   64a130000000         | mov                 eax, dword ptr fs:[0x30]
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   33cd                 | xor                 ecx, ebp
            //   e8????????           |                     

        $sequence_5 = { 51 ff15???????? 898564fdffff 83bd64fdffff00 7428 8b9564fdffff }
            // n = 6, score = 700
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   898564fdffff         | mov                 dword ptr [ebp - 0x29c], eax
            //   83bd64fdffff00       | cmp                 dword ptr [ebp - 0x29c], 0
            //   7428                 | je                  0x2a
            //   8b9564fdffff         | mov                 edx, dword ptr [ebp - 0x29c]

        $sequence_6 = { 33c0 668985ccb6ffff 6800200000 6a00 8d8dceb6ffff }
            // n = 5, score = 700
            //   33c0                 | xor                 eax, eax
            //   668985ccb6ffff       | mov                 word ptr [ebp - 0x4934], ax
            //   6800200000           | push                0x2000
            //   6a00                 | push                0
            //   8d8dceb6ffff         | lea                 ecx, [ebp - 0x4932]

        $sequence_7 = { 51 ff15???????? 8d94057cfeffff 52 }
            // n = 4, score = 700
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8d94057cfeffff       | lea                 edx, [ebp + eax - 0x184]
            //   52                   | push                edx

        $sequence_8 = { 81f2feed50fa 81eafe544f3b 81eabaac6ad1 8b042a eb0b 8b142b 5b }
            // n = 7, score = 100
            //   81f2feed50fa         | xor                 edx, 0xfa50edfe
            //   81eafe544f3b         | sub                 edx, 0x3b4f54fe
            //   81eabaac6ad1         | sub                 edx, 0xd16aacba
            //   8b042a               | mov                 eax, dword ptr [edx + ebp]
            //   eb0b                 | jmp                 0xd
            //   8b142b               | mov                 edx, dword ptr [ebx + ebp]
            //   5b                   | pop                 ebx

        $sequence_9 = { 8b042b 5b 53 bb8fbc7c14 81c30cf1050f e9???????? }
            // n = 6, score = 100
            //   8b042b               | mov                 eax, dword ptr [ebx + ebp]
            //   5b                   | pop                 ebx
            //   53                   | push                ebx
            //   bb8fbc7c14           | mov                 ebx, 0x147cbc8f
            //   81c30cf1050f         | add                 ebx, 0xf05f10c
            //   e9????????           |                     

        $sequence_10 = { eb3c 59 eb16 ba334d6d4b 81c279cf504e }
            // n = 5, score = 100
            //   eb3c                 | jmp                 0x3e
            //   59                   | pop                 ecx
            //   eb16                 | jmp                 0x18
            //   ba334d6d4b           | mov                 edx, 0x4b6d4d33
            //   81c279cf504e         | add                 edx, 0x4e50cf79

        $sequence_11 = { 81ebe35ad2f1 81c37daa580d 895c2404 5b e9???????? }
            // n = 5, score = 100
            //   81ebe35ad2f1         | sub                 ebx, 0xf1d25ae3
            //   81c37daa580d         | add                 ebx, 0xd58aa7d
            //   895c2404             | mov                 dword ptr [esp + 4], ebx
            //   5b                   | pop                 ebx
            //   e9????????           |                     

        $sequence_12 = { 81f1073623a7 81c16ea9e414 e9???????? eb15 81f0f63bb4b4 81f0556c2d03 }
            // n = 6, score = 100
            //   81f1073623a7         | xor                 ecx, 0xa7233607
            //   81c16ea9e414         | add                 ecx, 0x14e4a96e
            //   e9????????           |                     
            //   eb15                 | jmp                 0x17
            //   81f0f63bb4b4         | xor                 eax, 0xb4b43bf6
            //   81f0556c2d03         | xor                 eax, 0x32d6c55

        $sequence_13 = { b8e64d1443 81e8dc1e5dbe eb0a bf3d4243d4 e9???????? }
            // n = 5, score = 100
            //   b8e64d1443           | mov                 eax, 0x43144de6
            //   81e8dc1e5dbe         | sub                 eax, 0xbe5d1edc
            //   eb0a                 | jmp                 0xc
            //   bf3d4243d4           | mov                 edi, 0xd443423d
            //   e9????????           |                     

        $sequence_14 = { be11c85cd5 81f61f666769 81c6bc95fea7 e9???????? 897c2404 5f }
            // n = 6, score = 100
            //   be11c85cd5           | mov                 esi, 0xd55cc811
            //   81f61f666769         | xor                 esi, 0x6967661f
            //   81c6bc95fea7         | add                 esi, 0xa7fe95bc
            //   e9????????           |                     
            //   897c2404             | mov                 dword ptr [esp + 4], edi
            //   5f                   | pop                 edi

        $sequence_15 = { 8bec 83ec14 50 b8733628ff }
            // n = 4, score = 100
            //   8bec                 | mov                 ebp, esp
            //   83ec14               | sub                 esp, 0x14
            //   50                   | push                eax
            //   b8733628ff           | mov                 eax, 0xff283673

    condition:
        7 of them and filesize < 940032
}