rule win_urausy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.urausy."
        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.urausy"
        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 = { e8???????? 8945e8 ff75e8 e8???????? 0bc0 7510 }
            // n = 6, score = 200
            //   e8????????           |                     
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax
            //   ff75e8               | push                dword ptr [ebp - 0x18]
            //   e8????????           |                     
            //   0bc0                 | or                  eax, eax
            //   7510                 | jne                 0x12

        $sequence_1 = { ff75fc e8???????? 8b45f8 c9 c20400 ff25???????? }
            // n = 6, score = 200
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   e8????????           |                     
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   c9                   | leave               
            //   c20400               | ret                 4
            //   ff25????????         |                     

        $sequence_2 = { 8945e8 ff75e8 8d45f0 50 ff75ec e8???????? }
            // n = 6, score = 200
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax
            //   ff75e8               | push                dword ptr [ebp - 0x18]
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   e8????????           |                     

        $sequence_3 = { 53 ff75ec e8???????? ff75e8 ff75ec e8???????? }
            // n = 6, score = 200
            //   53                   | push                ebx
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   e8????????           |                     
            //   ff75e8               | push                dword ptr [ebp - 0x18]
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   e8????????           |                     

        $sequence_4 = { ffb538edffff e8???????? 33c0 b400 b000 }
            // n = 5, score = 200
            //   ffb538edffff         | push                dword ptr [ebp - 0x12c8]
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax
            //   b400                 | mov                 ah, 0
            //   b000                 | mov                 al, 0

        $sequence_5 = { b0b2 50 e8???????? 898538edffff ffb538edffff ff75ec e8???????? }
            // n = 7, score = 200
            //   b0b2                 | mov                 al, 0xb2
            //   50                   | push                eax
            //   e8????????           |                     
            //   898538edffff         | mov                 dword ptr [ebp - 0x12c8], eax
            //   ffb538edffff         | push                dword ptr [ebp - 0x12c8]
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   e8????????           |                     

        $sequence_6 = { ff75e4 e8???????? 8945f0 6a5a ff75e8 e8???????? 68ec090000 }
            // n = 7, score = 200
            //   ff75e4               | push                dword ptr [ebp - 0x1c]
            //   e8????????           |                     
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   6a5a                 | push                0x5a
            //   ff75e8               | push                dword ptr [ebp - 0x18]
            //   e8????????           |                     
            //   68ec090000           | push                0x9ec

        $sequence_7 = { 8b4508 50 8b00 ff5018 8d45e0 }
            // n = 5, score = 200
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   50                   | push                eax
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   ff5018               | call                dword ptr [eax + 0x18]
            //   8d45e0               | lea                 eax, [ebp - 0x20]

        $sequence_8 = { ff75e8 ff75ec 6809000058 6a00 68???????? 6a00 e8???????? }
            // n = 7, score = 200
            //   ff75e8               | push                dword ptr [ebp - 0x18]
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   6809000058           | push                0x58000009
            //   6a00                 | push                0
            //   68????????           |                     
            //   6a00                 | push                0
            //   e8????????           |                     

        $sequence_9 = { 6a00 e8???????? c705????????00000000 6a00 68???????? e8???????? 0bc0 }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   e8????????           |                     
            //   c705????????00000000     |     
            //   6a00                 | push                0
            //   68????????           |                     
            //   e8????????           |                     
            //   0bc0                 | or                  eax, eax

    condition:
        7 of them and filesize < 98304
}