rule win_narilam_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.narilam."
        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.narilam"
        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???????? e8???????? 85c0 0f8e90000000 8bc3 e8???????? e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f8e90000000         | jle                 0x96
            //   8bc3                 | mov                 eax, ebx
            //   e8????????           |                     
            //   e8????????           |                     

        $sequence_1 = { e8???????? 50 8bc3 8b10 ff527c 8bd0 4a }
            // n = 7, score = 100
            //   e8????????           |                     
            //   50                   | push                eax
            //   8bc3                 | mov                 eax, ebx
            //   8b10                 | mov                 edx, dword ptr [eax]
            //   ff527c               | call                dword ptr [edx + 0x7c]
            //   8bd0                 | mov                 edx, eax
            //   4a                   | dec                 edx

        $sequence_2 = { 8d7818 8d75e0 a5 a5 a5 a5 eb15 }
            // n = 7, score = 100
            //   8d7818               | lea                 edi, [eax + 0x18]
            //   8d75e0               | lea                 esi, [ebp - 0x20]
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]
            //   eb15                 | jmp                 0x17

        $sequence_3 = { ff8de8feffff 8d45c0 ba02000000 e8???????? 66c785dcfeffff9800 ba???????? 8d45bc }
            // n = 7, score = 100
            //   ff8de8feffff         | dec                 dword ptr [ebp - 0x118]
            //   8d45c0               | lea                 eax, [ebp - 0x40]
            //   ba02000000           | mov                 edx, 2
            //   e8????????           |                     
            //   66c785dcfeffff9800     | mov    word ptr [ebp - 0x124], 0x98
            //   ba????????           |                     
            //   8d45bc               | lea                 eax, [ebp - 0x44]

        $sequence_4 = { ffb50cfeffff e8???????? 59 8985f4fdffff 8b4d08 83b96003000006 0f85ff010000 }
            // n = 7, score = 100
            //   ffb50cfeffff         | push                dword ptr [ebp - 0x1f4]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8985f4fdffff         | mov                 dword ptr [ebp - 0x20c], eax
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   83b96003000006       | cmp                 dword ptr [ecx + 0x360], 6
            //   0f85ff010000         | jne                 0x205

        $sequence_5 = { e8???????? eb13 8bce b201 a1???????? e8???????? e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   eb13                 | jmp                 0x15
            //   8bce                 | mov                 ecx, esi
            //   b201                 | mov                 dl, 1
            //   a1????????           |                     
            //   e8????????           |                     
            //   e8????????           |                     

        $sequence_6 = { 8bf2 8bd8 8bd6 8bc3 8b08 ff91d0010000 8bd6 }
            // n = 7, score = 100
            //   8bf2                 | mov                 esi, edx
            //   8bd8                 | mov                 ebx, eax
            //   8bd6                 | mov                 edx, esi
            //   8bc3                 | mov                 eax, ebx
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   ff91d0010000         | call                dword ptr [ecx + 0x1d0]
            //   8bd6                 | mov                 edx, esi

        $sequence_7 = { 8d8540ffffff ba02000000 e8???????? 66c785dcfeffff1802 ba???????? 8d853cffffff e8???????? }
            // n = 7, score = 100
            //   8d8540ffffff         | lea                 eax, [ebp - 0xc0]
            //   ba02000000           | mov                 edx, 2
            //   e8????????           |                     
            //   66c785dcfeffff1802     | mov    word ptr [ebp - 0x124], 0x218
            //   ba????????           |                     
            //   8d853cffffff         | lea                 eax, [ebp - 0xc4]
            //   e8????????           |                     

        $sequence_8 = { 8bd0 ff85e8feffff 8b4510 e8???????? 8d55f8 52 ba???????? }
            // n = 7, score = 100
            //   8bd0                 | mov                 edx, eax
            //   ff85e8feffff         | inc                 dword ptr [ebp - 0x118]
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   e8????????           |                     
            //   8d55f8               | lea                 edx, [ebp - 8]
            //   52                   | push                edx
            //   ba????????           |                     

        $sequence_9 = { 8d8568ffffff e8???????? 8bc8 ff852cfeffff 8b95f4fdffff 8b949570e3f9ff 8b85fcfdffff }
            // n = 7, score = 100
            //   8d8568ffffff         | lea                 eax, [ebp - 0x98]
            //   e8????????           |                     
            //   8bc8                 | mov                 ecx, eax
            //   ff852cfeffff         | inc                 dword ptr [ebp - 0x1d4]
            //   8b95f4fdffff         | mov                 edx, dword ptr [ebp - 0x20c]
            //   8b949570e3f9ff       | mov                 edx, dword ptr [ebp + edx*4 - 0x61c90]
            //   8b85fcfdffff         | mov                 eax, dword ptr [ebp - 0x204]

    condition:
        7 of them and filesize < 3325952
}