rule win_redpepper_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.redpepper."
        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.redpepper"
        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 = { 6a00 6a00 6a00 ff15???????? 8b0d???????? 8904b1 }
            // n = 6, score = 300
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   8b0d????????         |                     
            //   8904b1               | mov                 dword ptr [ecx + esi*4], eax

        $sequence_1 = { 33c0 5f c3 8b4710 56 8b7720 85c0 }
            // n = 7, score = 300
            //   33c0                 | xor                 eax, eax
            //   5f                   | pop                 edi
            //   c3                   | ret                 
            //   8b4710               | mov                 eax, dword ptr [edi + 0x10]
            //   56                   | push                esi
            //   8b7720               | mov                 esi, dword ptr [edi + 0x20]
            //   85c0                 | test                eax, eax

        $sequence_2 = { 57 e8???????? 57 e8???????? 83c410 807c38ff5c 7426 }
            // n = 7, score = 300
            //   57                   | push                edi
            //   e8????????           |                     
            //   57                   | push                edi
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   807c38ff5c           | cmp                 byte ptr [eax + edi - 1], 0x5c
            //   7426                 | je                  0x28

        $sequence_3 = { e8???????? 8b4c2458 50 8b442460 8d542430 6a00 }
            // n = 6, score = 300
            //   e8????????           |                     
            //   8b4c2458             | mov                 ecx, dword ptr [esp + 0x58]
            //   50                   | push                eax
            //   8b442460             | mov                 eax, dword ptr [esp + 0x60]
            //   8d542430             | lea                 edx, [esp + 0x30]
            //   6a00                 | push                0

        $sequence_4 = { 50 c705????????10010000 c705????????02000000 c705????????05000000 }
            // n = 4, score = 300
            //   50                   | push                eax
            //   c705????????10010000     |     
            //   c705????????02000000     |     
            //   c705????????05000000     |     

        $sequence_5 = { 41 83f904 8b12 8a540aff 885429ff }
            // n = 5, score = 300
            //   41                   | inc                 ecx
            //   83f904               | cmp                 ecx, 4
            //   8b12                 | mov                 edx, dword ptr [edx]
            //   8a540aff             | mov                 dl, byte ptr [edx + ecx - 1]
            //   885429ff             | mov                 byte ptr [ecx + ebp - 1], dl

        $sequence_6 = { 6a67 6a20 e8???????? 83c414 ebba }
            // n = 5, score = 300
            //   6a67                 | push                0x67
            //   6a20                 | push                0x20
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14
            //   ebba                 | jmp                 0xffffffbc

        $sequence_7 = { 68???????? 6a7a 6a70 6a20 e8???????? 83c428 33c0 }
            // n = 7, score = 300
            //   68????????           |                     
            //   6a7a                 | push                0x7a
            //   6a70                 | push                0x70
            //   6a20                 | push                0x20
            //   e8????????           |                     
            //   83c428               | add                 esp, 0x28
            //   33c0                 | xor                 eax, eax

        $sequence_8 = { 5e 8bc3 5d 5b c3 57 }
            // n = 6, score = 300
            //   5e                   | pop                 esi
            //   8bc3                 | mov                 eax, ebx
            //   5d                   | pop                 ebp
            //   5b                   | pop                 ebx
            //   c3                   | ret                 
            //   57                   | push                edi

        $sequence_9 = { e8???????? 50 56 e8???????? 83c41c 85c0 7502 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   50                   | push                eax
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c41c               | add                 esp, 0x1c
            //   85c0                 | test                eax, eax
            //   7502                 | jne                 4

    condition:
        7 of them and filesize < 2482176
}

import "pe"

rule win_redpepper_w0 {
   meta:
      author = "Microsoft, modified by @r0ny_123"
      description = "Adupib SSL Backdoor"
      hash = "d3ad0933e1b114b14c2b3a2c59d7f8a95ea0bcbd"
      hash = "a80051d5ae124fd9e5cc03e699dd91c2b373978b"
      malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.redpepper"
      malpedia_version = "20200101"
      malpedia_license = "CC BY-NC-SA 4.0"
      malpedia_sharing = "TLP:WHITE"
   strings:
      $str1 = "POLL_RATE"
      $str2 = "OP_TIME(end hour)"
      $str3 = "%d:TCP:*:Enabled"
      $s1 = "%s[PwFF_cfg%d]"
      $str4 = "Fake_GetDlgItemTextW: ***value***="

   condition:
      pe.exports("DllGetClassObject")
      and pe.exports("GetStartObjectEx") and (all of them or $s1)
}