rule elf_hideandseek_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects elf.hideandseek."
        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/elf.hideandseek"
        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 = { e8???????? 83c410 39df 7411 83ec0c 55 e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   39df                 | cmp                 edi, ebx
            //   7411                 | je                  0x13
            //   83ec0c               | sub                 esp, 0xc
            //   55                   | push                ebp
            //   e8????????           |                     

        $sequence_1 = { 80cc08 50 6a04 53 e8???????? 83c418 5b }
            // n = 7, score = 100
            //   80cc08               | or                  ah, 8
            //   50                   | push                eax
            //   6a04                 | push                4
            //   53                   | push                ebx
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   5b                   | pop                 ebx

        $sequence_2 = { 85c0 0f888d000000 f6431008 0f8583000000 50 53 6815890000 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   0f888d000000         | js                  0x93
            //   f6431008             | test                byte ptr [ebx + 0x10], 8
            //   0f8583000000         | jne                 0x89
            //   50                   | push                eax
            //   53                   | push                ebx
            //   6815890000           | push                0x8915

        $sequence_3 = { 83c410 89c7 85c0 0f8576040000 50 50 ffb42494000000 }
            // n = 7, score = 100
            //   83c410               | add                 esp, 0x10
            //   89c7                 | mov                 edi, eax
            //   85c0                 | test                eax, eax
            //   0f8576040000         | jne                 0x47c
            //   50                   | push                eax
            //   50                   | push                eax
            //   ffb42494000000       | push                dword ptr [esp + 0x94]

        $sequence_4 = { 50 8d442478 50 8d742464 56 e8???????? 83c410 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8d442478             | lea                 eax, [esp + 0x78]
            //   50                   | push                eax
            //   8d742464             | lea                 esi, [esp + 0x64]
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10

        $sequence_5 = { 52 56 ff7308 e8???????? 83c420 6800400000 6a18 }
            // n = 7, score = 100
            //   52                   | push                edx
            //   56                   | push                esi
            //   ff7308               | push                dword ptr [ebx + 8]
            //   e8????????           |                     
            //   83c420               | add                 esp, 0x20
            //   6800400000           | push                0x4000
            //   6a18                 | push                0x18

        $sequence_6 = { e8???????? 89f2 8b8424f0000000 e8???????? 8bb424d4000000 0fb79c24da000000 0fb7bc24d8000000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   89f2                 | mov                 edx, esi
            //   8b8424f0000000       | mov                 eax, dword ptr [esp + 0xf0]
            //   e8????????           |                     
            //   8bb424d4000000       | mov                 esi, dword ptr [esp + 0xd4]
            //   0fb79c24da000000     | movzx               ebx, word ptr [esp + 0xda]
            //   0fb7bc24d8000000     | movzx               edi, word ptr [esp + 0xd8]

        $sequence_7 = { 0fb702 83e902 01c3 83c202 83f901 77f0 7505 }
            // n = 7, score = 100
            //   0fb702               | movzx               eax, word ptr [edx]
            //   83e902               | sub                 ecx, 2
            //   01c3                 | add                 ebx, eax
            //   83c202               | add                 edx, 2
            //   83f901               | cmp                 ecx, 1
            //   77f0                 | ja                  0xfffffff2
            //   7505                 | jne                 7

        $sequence_8 = { 59 5e 6a02 53 e8???????? 83c410 89c6 }
            // n = 7, score = 100
            //   59                   | pop                 ecx
            //   5e                   | pop                 esi
            //   6a02                 | push                2
            //   53                   | push                ebx
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   89c6                 | mov                 esi, eax

        $sequence_9 = { 50 50 53 68???????? e8???????? 6a08 8d84243c210000 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   50                   | push                eax
            //   53                   | push                ebx
            //   68????????           |                     
            //   e8????????           |                     
            //   6a08                 | push                8
            //   8d84243c210000       | lea                 eax, [esp + 0x213c]

    condition:
        7 of them and filesize < 196608
}