rule win_edr_silencer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.edr_silencer."
        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.edr_silencer"
        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 = { b801000000 e9???????? 488b05???????? ffd0 }
            // n = 4, score = 100
            //   b801000000           | dec                 eax
            //   e9????????           |                     
            //   488b05????????       |                     
            //   ffd0                 | lea                 ecx, [0xf366]

        $sequence_1 = { 4889c1 e8???????? eb21 488b4518 4883c008 488b00 4889c2 }
            // n = 7, score = 100
            //   4889c1               | push                ebp
            //   e8????????           |                     
            //   eb21                 | dec                 eax
            //   488b4518             | mov                 ebp, esp
            //   4883c008             | dec                 eax
            //   488b00               | sub                 esp, 0x20
            //   4889c2               | dec                 eax

        $sequence_2 = { 488d9530030000 488b8580040000 4889c1 e8???????? 85c0 752f 488b05???????? }
            // n = 7, score = 100
            //   488d9530030000       | dec                 eax
            //   488b8580040000       | lea                 edx, [0xd053]
            //   4889c1               | ja                  0x788
            //   e8????????           |                     
            //   85c0                 | inc                 ebp
            //   752f                 | test                esi, esi
            //   488b05????????       |                     

        $sequence_3 = { 488b05???????? ffd0 488d55f8 4989d0 ba28000000 4889c1 }
            // n = 6, score = 100
            //   488b05????????       |                     
            //   ffd0                 | dec                 eax
            //   488d55f8             | mov                 eax, dword ptr [esp + 0x90]
            //   4989d0               | mov                 dword ptr [eax], ecx
            //   ba28000000           | dec                 eax
            //   4889c1               | lea                 eax, [esp + 0x48]

        $sequence_4 = { 488b05???????? ffd0 85c0 752e }
            // n = 4, score = 100
            //   488b05????????       |                     
            //   ffd0                 | cmp                 dword ptr [ebp + 0x10], 0
            //   85c0                 | je                  0xf8
            //   752e                 | dec                 eax

        $sequence_5 = { 837d1002 7f16 488d0dfcca0000 e8???????? b801000000 e9???????? }
            // n = 6, score = 100
            //   837d1002             | dec                 eax
            //   7f16                 | mov                 eax, dword ptr [ebp + 0x18]
            //   488d0dfcca0000       | dec                 eax
            //   e8????????           |                     
            //   b801000000           | add                 eax, edx
            //   e9????????           |                     

        $sequence_6 = { 488d55c0 4889c1 e8???????? 85c0 7408 488d45c0 }
            // n = 6, score = 100
            //   488d55c0             | mov                 eax, dword ptr [ebp + 0x10]
            //   4889c1               | dec                 eax
            //   e8????????           |                     
            //   85c0                 | mov                 eax, dword ptr [eax + 8]
            //   7408                 | dec                 eax
            //   488d45c0             | test                eax, eax

        $sequence_7 = { 4989f9 4189f0 488d1597870000 e8???????? ebbb }
            // n = 5, score = 100
            //   4989f9               | test                eax, eax
            //   4189f0               | jne                 0x251
            //   488d1597870000       | call                eax
            //   e8????????           |                     
            //   ebbb                 | test                eax, eax

        $sequence_8 = { 488b00 4883c010 488945f0 488b45f0 488b00 488945e8 }
            // n = 6, score = 100
            //   488b00               | pop                 ebp
            //   4883c010             | ret                 
            //   488945f0             | call                eax
            //   488b45f0             | mov                 dword ptr [eax], 0
            //   488b00               | dec                 eax
            //   488945e8             | mov                 eax, dword ptr [ebp + 0x18]

        $sequence_9 = { 488b05???????? ffd0 89c2 488d0d5fc70000 }
            // n = 4, score = 100
            //   488b05????????       |                     
            //   ffd0                 | jmp                 0x177
            //   89c2                 | add                 dword ptr [ebp - 4], 1
            //   488d0d5fc70000       | dec                 eax

    condition:
        7 of them and filesize < 744448
}