rule win_loup_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.loup."
        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.loup"
        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 = { b904000000 6bd100 c78264a1410002000000 b804000000 6bc800 8b15???????? }
            // n = 6, score = 100
            //   b904000000           | mov                 ecx, 4
            //   6bd100               | imul                edx, ecx, 0
            //   c78264a1410002000000     | mov    dword ptr [edx + 0x41a164], 2
            //   b804000000           | mov                 eax, 4
            //   6bc800               | imul                ecx, eax, 0
            //   8b15????????         |                     

        $sequence_1 = { e8???????? 8945b4 8b45c0 50 e8???????? 837db400 750c }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8945b4               | mov                 dword ptr [ebp - 0x4c], eax
            //   8b45c0               | mov                 eax, dword ptr [ebp - 0x40]
            //   50                   | push                eax
            //   e8????????           |                     
            //   837db400             | cmp                 dword ptr [ebp - 0x4c], 0
            //   750c                 | jne                 0xe

        $sequence_2 = { e8???????? e8???????? 85c0 750c c7853cffffff01000000 }
            // n = 5, score = 100
            //   e8????????           |                     
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   750c                 | jne                 0xe
            //   c7853cffffff01000000     | mov    dword ptr [ebp - 0xc4], 1

        $sequence_3 = { f3ab b9???????? e8???????? e8???????? 85c0 750c }
            // n = 6, score = 100
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   b9????????           |                     
            //   e8????????           |                     
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   750c                 | jne                 0xe

        $sequence_4 = { 53 56 ff3485647b4100 50 e8???????? }
            // n = 5, score = 100
            //   53                   | push                ebx
            //   56                   | push                esi
            //   ff3485647b4100       | push                dword ptr [eax*4 + 0x417b64]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_5 = { 8bcd 50 8d156c1b4100 e8???????? 58 5a 5f }
            // n = 7, score = 100
            //   8bcd                 | mov                 ecx, ebp
            //   50                   | push                eax
            //   8d156c1b4100         | lea                 edx, [0x411b6c]
            //   e8????????           |                     
            //   58                   | pop                 eax
            //   5a                   | pop                 edx
            //   5f                   | pop                 edi

        $sequence_6 = { 52 6802020000 68c0d40100 6a00 6a00 }
            // n = 5, score = 100
            //   52                   | push                edx
            //   6802020000           | push                0x202
            //   68c0d40100           | push                0x1d4c0
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_7 = { ff15???????? 83c40c 3bf4 e8???????? c745cfc8000000 }
            // n = 5, score = 100
            //   ff15????????         |                     
            //   83c40c               | add                 esp, 0xc
            //   3bf4                 | cmp                 esi, esp
            //   e8????????           |                     
            //   c745cfc8000000       | mov                 dword ptr [ebp - 0x31], 0xc8

        $sequence_8 = { c78568fcffff01000000 eb0a c78568fcffff00000000 8b8568fcffff 52 8bcd 50 }
            // n = 7, score = 100
            //   c78568fcffff01000000     | mov    dword ptr [ebp - 0x398], 1
            //   eb0a                 | jmp                 0xc
            //   c78568fcffff00000000     | mov    dword ptr [ebp - 0x398], 0
            //   8b8568fcffff         | mov                 eax, dword ptr [ebp - 0x398]
            //   52                   | push                edx
            //   8bcd                 | mov                 ecx, ebp
            //   50                   | push                eax

        $sequence_9 = { 8d156c1b4100 e8???????? 58 5a 5f }
            // n = 5, score = 100
            //   8d156c1b4100         | lea                 edx, [0x411b6c]
            //   e8????????           |                     
            //   58                   | pop                 eax
            //   5a                   | pop                 edx
            //   5f                   | pop                 edi

    condition:
        7 of them and filesize < 257024
}

rule win_loup_w0 {
	meta:
		description = "Detects of ATM Malware Loup"
		author = "Frank Boldewin (@r3c0nst)"
		reference = "https://twitter.com/r3c0nst/status/1295275546780327936"
		source = "https://raw.githubusercontent.com/fboldewin/YARA-rules/master/ATM.Malware.Loup.yar"
		date = "2020-08-17"
		hash = "6c9e9f78963ab3e7acb43826906af22571250dc025f9e7116e0201b805dc1196"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.loup"
        malpedia_rule_date = "20200817"
        malpedia_version = "20200817"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

	strings:
		$String1 = "C:\\Users\\muham\\source\\repos\\loup\\Debug\\loup.pdb" ascii nocase
		$String2 = "CurrencyDispenser1" ascii nocase
		$Code = {50 68 C0 D4 01 00 8D 4D E8 51 68 2E 01 00 00 0F B7 55 08 52 E8} // Dispense
		
	condition:
		uint16(0) == 0x5A4D and filesize < 100KB and all of ($String*) and $Code
}