rule win_prilex_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.prilex."
        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.prilex"
        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 = { 52 ff511c dbe2 8985ecfeffff 83bdecfeffff00 7d23 }
            // n = 6, score = 400
            //   52                   | push                edx
            //   ff511c               | call                dword ptr [ecx + 0x1c]
            //   dbe2                 | fnclex              
            //   8985ecfeffff         | mov                 dword ptr [ebp - 0x114], eax
            //   83bdecfeffff00       | cmp                 dword ptr [ebp - 0x114], 0
            //   7d23                 | jge                 0x25

        $sequence_1 = { c745fc17000000 8d55d0 52 e8???????? 8985f4feffff }
            // n = 5, score = 400
            //   c745fc17000000       | mov                 dword ptr [ebp - 4], 0x17
            //   8d55d0               | lea                 edx, [ebp - 0x30]
            //   52                   | push                edx
            //   e8????????           |                     
            //   8985f4feffff         | mov                 dword ptr [ebp - 0x10c], eax

        $sequence_2 = { 51 6a04 6880000000 ff15???????? 83c41c 33ff }
            // n = 6, score = 400
            //   51                   | push                ecx
            //   6a04                 | push                4
            //   6880000000           | push                0x80
            //   ff15????????         |                     
            //   83c41c               | add                 esp, 0x1c
            //   33ff                 | xor                 edi, edi

        $sequence_3 = { 52 ff15???????? 50 8d85fcfeffff 50 8d8d2cffffff 51 }
            // n = 7, score = 400
            //   52                   | push                edx
            //   ff15????????         |                     
            //   50                   | push                eax
            //   8d85fcfeffff         | lea                 eax, [ebp - 0x104]
            //   50                   | push                eax
            //   8d8d2cffffff         | lea                 ecx, [ebp - 0xd4]
            //   51                   | push                ecx

        $sequence_4 = { 7405 e9???????? c745fc15000000 6a00 }
            // n = 4, score = 400
            //   7405                 | je                  7
            //   e9????????           |                     
            //   c745fc15000000       | mov                 dword ptr [ebp - 4], 0x15
            //   6a00                 | push                0

        $sequence_5 = { ff15???????? 8d85f8feffff 50 8d4da8 51 8d55c8 }
            // n = 6, score = 400
            //   ff15????????         |                     
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]
            //   50                   | push                eax
            //   8d4da8               | lea                 ecx, [ebp - 0x58]
            //   51                   | push                ecx
            //   8d55c8               | lea                 edx, [ebp - 0x38]

        $sequence_6 = { 8d8dacfdffff 68???????? 52 898d54fdffff c7854cfdffff08400000 ff15???????? }
            // n = 6, score = 400
            //   8d8dacfdffff         | lea                 ecx, [ebp - 0x254]
            //   68????????           |                     
            //   52                   | push                edx
            //   898d54fdffff         | mov                 dword ptr [ebp - 0x2ac], ecx
            //   c7854cfdffff08400000     | mov    dword ptr [ebp - 0x2b4], 0x4008
            //   ff15????????         |                     

        $sequence_7 = { c745fc1b000000 8b55c4 52 8d45b0 50 }
            // n = 5, score = 400
            //   c745fc1b000000       | mov                 dword ptr [ebp - 4], 0x1b
            //   8b55c4               | mov                 edx, dword ptr [ebp - 0x3c]
            //   52                   | push                edx
            //   8d45b0               | lea                 eax, [ebp - 0x50]
            //   50                   | push                eax

        $sequence_8 = { 50 51 0f8035010000 ff15???????? 8b4dd4 3bcf }
            // n = 6, score = 400
            //   50                   | push                eax
            //   51                   | push                ecx
            //   0f8035010000         | jo                  0x13b
            //   ff15????????         |                     
            //   8b4dd4               | mov                 ecx, dword ptr [ebp - 0x2c]
            //   3bcf                 | cmp                 ecx, edi

        $sequence_9 = { c785acfeffff00000000 33d2 83bdf4feffff00 0f95c2 f7da 668995e8feffff 8d4d9c }
            // n = 7, score = 400
            //   c785acfeffff00000000     | mov    dword ptr [ebp - 0x154], 0
            //   33d2                 | xor                 edx, edx
            //   83bdf4feffff00       | cmp                 dword ptr [ebp - 0x10c], 0
            //   0f95c2               | setne               dl
            //   f7da                 | neg                 edx
            //   668995e8feffff       | mov                 word ptr [ebp - 0x118], dx
            //   8d4d9c               | lea                 ecx, [ebp - 0x64]

    condition:
        7 of them and filesize < 450560
}