rule win_action_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.action_rat."
        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.action_rat"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 8bec 83ec38 56 894dfc 8b45fc 50 }
            // n = 6, score = 100
            //   8bec                 | mov                 ebp, esp
            //   83ec38               | sub                 esp, 0x38
            //   56                   | push                esi
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   50                   | push                eax

        $sequence_1 = { 8b4d10 51 8b4df0 81c1b4000000 e8???????? c645fc09 }
            // n = 6, score = 100
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   51                   | push                ecx
            //   8b4df0               | mov                 ecx, dword ptr [ebp - 0x10]
            //   81c1b4000000         | add                 ecx, 0xb4
            //   e8????????           |                     
            //   c645fc09             | mov                 byte ptr [ebp - 4], 9

        $sequence_2 = { 52 e8???????? 83c404 50 8b4dfc 83c118 }
            // n = 6, score = 100
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   50                   | push                eax
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   83c118               | add                 ecx, 0x18

        $sequence_3 = { ba01000000 c1e200 8b450c 880c10 8b4d08 c1f906 }
            // n = 6, score = 100
            //   ba01000000           | mov                 edx, 1
            //   c1e200               | shl                 edx, 0
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   880c10               | mov                 byte ptr [eax + edx], cl
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   c1f906               | sar                 ecx, 6

        $sequence_4 = { 8b4d10 51 8b4d0c e8???????? 0fb6d0 85d2 752a }
            // n = 7, score = 100
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   51                   | push                ecx
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   e8????????           |                     
            //   0fb6d0               | movzx               edx, al
            //   85d2                 | test                edx, edx
            //   752a                 | jne                 0x2c

        $sequence_5 = { 83c902 8b5004 52 51 ff15???????? 83c41c }
            // n = 6, score = 100
            //   83c902               | or                  ecx, 2
            //   8b5004               | mov                 edx, dword ptr [eax + 4]
            //   52                   | push                edx
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   83c41c               | add                 esp, 0x1c

        $sequence_6 = { 51 6a00 6a00 8b55fc 8b4204 50 8b4dfc }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   50                   | push                eax
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

        $sequence_7 = { 68901f0000 68???????? b9???????? e8???????? 68???????? e8???????? }
            // n = 6, score = 100
            //   68901f0000           | push                0x1f90
            //   68????????           |                     
            //   b9????????           |                     
            //   e8????????           |                     
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_8 = { 7209 c745d803000000 eb0b 8b4df8 83e901 d1e9 894dd8 }
            // n = 7, score = 100
            //   7209                 | jb                  0xb
            //   c745d803000000       | mov                 dword ptr [ebp - 0x28], 3
            //   eb0b                 | jmp                 0xd
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   83e901               | sub                 ecx, 1
            //   d1e9                 | shr                 ecx, 1
            //   894dd8               | mov                 dword ptr [ebp - 0x28], ecx

        $sequence_9 = { 89856cfbffff 8b8d6cfbffff 898d68fbffff c645fc13 8b9568fbffff 52 8d85ecfcffff }
            // n = 7, score = 100
            //   89856cfbffff         | mov                 dword ptr [ebp - 0x494], eax
            //   8b8d6cfbffff         | mov                 ecx, dword ptr [ebp - 0x494]
            //   898d68fbffff         | mov                 dword ptr [ebp - 0x498], ecx
            //   c645fc13             | mov                 byte ptr [ebp - 4], 0x13
            //   8b9568fbffff         | mov                 edx, dword ptr [ebp - 0x498]
            //   52                   | push                edx
            //   8d85ecfcffff         | lea                 eax, [ebp - 0x314]

    condition:
        7 of them and filesize < 480256
}