rule win_ceeloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.ceeloader."
        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.ceeloader"
        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 = { 898424380b0000 8b8424e40a0000 0b8424080a0000 8984243c0a0000 8b8424f0050000 0b842470080000 89842430070000 }
            // n = 7, score = 100
            //   898424380b0000       | or                  edx, ebx
            //   8b8424e40a0000       | cmp                 ecx, esi
            //   0b8424080a0000       | and                 esi, ebx
            //   8984243c0a0000       | jp                  0x3df
            //   8b8424f0050000       | or                  ebx, edx
            //   0b842470080000       | or                  ebx, edx
            //   89842430070000       | mov                 ebx, esi

        $sequence_1 = { 0fbe05???????? 83f042 88c1 888c241d010000 0fbe05???????? 83f069 88c1 }
            // n = 7, score = 100
            //   0fbe05????????       |                     
            //   83f042               | mov                 dword ptr [esp + 0x740], edx
            //   88c1                 | dec                 esp
            //   888c241d010000       | mov                 edx, ecx
            //   0fbe05????????       |                     
            //   83f069               | inc                 ebp
            //   88c1                 | xor                 eax, eax

        $sequence_2 = { 33f5 0bda 8bde 0bd3 3bce 8bf5 }
            // n = 6, score = 100
            //   33f5                 | dec                 eax
            //   0bda                 | ror                 edx, cl
            //   8bde                 | dec                 ecx
            //   0bd3                 | xor                 edx, eax
            //   3bce                 | dec                 ebx
            //   8bf5                 | xchg                dword ptr [edi + esi*8 + 0x10e080], edx

        $sequence_3 = { c784249002000075380000 c784248c020000c5360000 c78424880200005a380000 c7842484020000ff6f0000 c7842480020000123e0000 c784247c02000043360000 c78424780200001f220000 }
            // n = 7, score = 100
            //   c784249002000075380000     | inc    esp
            //   c784248c020000c5360000     | mov    dword ptr [esp + 0x5a4], edx
            //   c78424880200005a380000     | inc    esp
            //   c7842484020000ff6f0000     | add    ecx, dword ptr [esp + 0x5a4]
            //   c7842480020000123e0000     | inc    esp
            //   c784247c02000043360000     | mov    dword ptr [esp + 0x5a0], ecx
            //   c78424780200001f220000     | inc    esp

        $sequence_4 = { 668b9c2406120000 6681f3ffff 66899c2404120000 6623bc2404120000 6689bc2402120000 668bbc2402120000 6689d3 }
            // n = 7, score = 100
            //   668b9c2406120000     | dec                 eax
            //   6681f3ffff           | mov                 dword ptr [esp + 0x920], 0
            //   66899c2404120000     | dec                 eax
            //   6623bc2404120000     | mov                 ecx, dword ptr [esp + 0x928]
            //   6689bc2402120000     | inc                 ecx
            //   668bbc2402120000     | mov                 eax, eax
            //   6689d3               | mov                 dword ptr [esp + 0x10f0], 0x8a0ac41f

        $sequence_5 = { 2500feffff 898424b80b0000 8b8424b80b0000 05ffffffff 898424b40b0000 8b8424b40b0000 83e000 }
            // n = 7, score = 100
            //   2500feffff           | dec                 eax
            //   898424b80b0000       | mov                 dword ptr [esp + 0x50], ecx
            //   8b8424b80b0000       | dec                 eax
            //   05ffffffff           | mov                 ecx, eax
            //   898424b40b0000       | dec                 eax
            //   8b8424b40b0000       | lea                 eax, [0xb644f]
            //   83e000               | mov                 dword ptr [esp + 0x4c], edx

        $sequence_6 = { 6b94242801000005 89942424010000 8b942424010000 83e280 89942420010000 8b942420010000 3b15???????? }
            // n = 7, score = 100
            //   6b94242801000005     | dec                 esp
            //   89942424010000       | mov                 eax, dword ptr [esp + 0x128]
            //   8b942424010000       | mov                 dword ptr [esp + 0x930], 0x2a5b
            //   83e280               | dec                 eax
            //   89942420010000       | lea                 ecx, [esp + 0x15e0]
            //   8b942420010000       | dec                 eax
            //   3b15????????         |                     

        $sequence_7 = { 48c784242802000000000000 4c8b842428020000 668b942430020000 668b8c2432020000 ff15???????? 89842424020000 8b8424600c0000 }
            // n = 7, score = 100
            //   48c784242802000000000000     | xor    edx, edx
            //   4c8b842428020000     | mov                 ecx, edx
            //   668b942430020000     | mov                 dword ptr [esp + 0x28], 0x80
            //   668b8c2432020000     | dec                 eax
            //   ff15????????         |                     
            //   89842424020000       | mov                 dword ptr [esp + 0x30], 0
            //   8b8424600c0000       | mov                 dword ptr [esp + 0x438], eax

        $sequence_8 = { 488981f0000000 488b05???????? 488b80f0000000 4c8b442448 8b542444 488b4c2438 ffd0 }
            // n = 7, score = 100
            //   488981f0000000       | mov                 dword ptr [esp + 0x2b4], esi
            //   488b05????????       |                     
            //   488b80f0000000       | mov                 esi, edx
            //   4c8b442448           | and                 esi, 0x23d9135
            //   8b542444             | mov                 dword ptr [esp + 0x2c4], esi
            //   488b4c2438           | mov                 esi, dword ptr [esp + 0x2c4]
            //   ffd0                 | shl                 esi, 4

        $sequence_9 = { 8b8424c00c0000 c1e808 898424bc0c0000 8b8424bc0c0000 c1e002 898424b80c0000 8b8424b80c0000 }
            // n = 7, score = 100
            //   8b8424c00c0000       | cmp                 ecx, esi
            //   c1e808               | mov                 esi, ebp
            //   898424bc0c0000       | mov                 eax, esi
            //   8b8424bc0c0000       | xor                 esi, ebp
            //   c1e002               | or                  ebx, edx
            //   898424b80c0000       | mov                 ebx, esi
            //   8b8424b80c0000       | or                  edx, ebx

    condition:
        7 of them and filesize < 2321408
}