rule win_lolsnif_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.lolsnif."
        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.lolsnif"
        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 = { 895dfc 8945d8 7522 f605????????01 7419 8b7708 }
            // n = 6, score = 200
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   8945d8               | mov                 dword ptr [ebp - 0x28], eax
            //   7522                 | jne                 0x24
            //   f605????????01       |                     
            //   7419                 | je                  0x1b
            //   8b7708               | mov                 esi, dword ptr [edi + 8]

        $sequence_1 = { ffd6 85c0 752b 8b7510 50 ff35???????? }
            // n = 6, score = 200
            //   ffd6                 | call                esi
            //   85c0                 | test                eax, eax
            //   752b                 | jne                 0x2d
            //   8b7510               | mov                 esi, dword ptr [ebp + 0x10]
            //   50                   | push                eax
            //   ff35????????         |                     

        $sequence_2 = { 8b7d08 41 837f3c00 894c240c 0f8492000000 8d4738 66833800 }
            // n = 7, score = 200
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   41                   | inc                 ecx
            //   837f3c00             | cmp                 dword ptr [edi + 0x3c], 0
            //   894c240c             | mov                 dword ptr [esp + 0xc], ecx
            //   0f8492000000         | je                  0x98
            //   8d4738               | lea                 eax, [edi + 0x38]
            //   66833800             | cmp                 word ptr [eax], 0

        $sequence_3 = { 5f 5e 5b 8be5 5d c20800 8b413c }
            // n = 7, score = 200
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20800               | ret                 8
            //   8b413c               | mov                 eax, dword ptr [ecx + 0x3c]

        $sequence_4 = { 50 e8???????? eb2a ff35???????? ff35???????? }
            // n = 5, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   eb2a                 | jmp                 0x2c
            //   ff35????????         |                     
            //   ff35????????         |                     

        $sequence_5 = { 3dd808c373 7437 3d0c293b74 741a }
            // n = 4, score = 200
            //   3dd808c373           | cmp                 eax, 0x73c308d8
            //   7437                 | je                  0x39
            //   3d0c293b74           | cmp                 eax, 0x743b290c
            //   741a                 | je                  0x1c

        $sequence_6 = { 7556 8b7df8 ff75fc 8bcf e8???????? 8bf0 a1???????? }
            // n = 7, score = 200
            //   7556                 | jne                 0x58
            //   8b7df8               | mov                 edi, dword ptr [ebp - 8]
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   a1????????           |                     

        $sequence_7 = { c20400 83ec18 8364240c00 53 55 bd04010000 6850020000 }
            // n = 7, score = 200
            //   c20400               | ret                 4
            //   83ec18               | sub                 esp, 0x18
            //   8364240c00           | and                 dword ptr [esp + 0xc], 0
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   bd04010000           | mov                 ebp, 0x104
            //   6850020000           | push                0x250

        $sequence_8 = { 8b4710 8b75ec 3bf3 8945e8 750c c745fc02000000 e9???????? }
            // n = 7, score = 200
            //   8b4710               | mov                 eax, dword ptr [edi + 0x10]
            //   8b75ec               | mov                 esi, dword ptr [ebp - 0x14]
            //   3bf3                 | cmp                 esi, ebx
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax
            //   750c                 | jne                 0xe
            //   c745fc02000000       | mov                 dword ptr [ebp - 4], 2
            //   e9????????           |                     

        $sequence_9 = { 8be5 5d c20400 55 8bec 83ec14 8b5508 }
            // n = 7, score = 200
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20400               | ret                 4
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   83ec14               | sub                 esp, 0x14
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]

    condition:
        7 of them and filesize < 425984
}