rule elf_hideandseek_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 8b442424 39742420 7504 89c6 eb21 39442420 }
            // n = 6, score = 100
            //   8b442424             | mov                 eax, dword ptr [esp + 0x24]
            //   39742420             | cmp                 dword ptr [esp + 0x20], esi
            //   7504                 | jne                 6
            //   89c6                 | mov                 esi, eax
            //   eb21                 | jmp                 0x23
            //   39442420             | cmp                 dword ptr [esp + 0x20], eax

        $sequence_1 = { 40 663b47f0 668947ee 7238 52 52 }
            // n = 6, score = 100
            //   40                   | inc                 eax
            //   663b47f0             | cmp                 ax, word ptr [edi - 0x10]
            //   668947ee             | mov                 word ptr [edi - 0x12], ax
            //   7238                 | jb                  0x3a
            //   52                   | push                edx
            //   52                   | push                edx

        $sequence_2 = { 50 e8???????? 58 5a 6a40 8d8424b0210000 50 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   e8????????           |                     
            //   58                   | pop                 eax
            //   5a                   | pop                 edx
            //   6a40                 | push                0x40
            //   8d8424b0210000       | lea                 eax, [esp + 0x21b0]
            //   50                   | push                eax

        $sequence_3 = { be04000000 83c410 84c0 7519 e9???????? }
            // n = 5, score = 100
            //   be04000000           | mov                 esi, 4
            //   83c410               | add                 esp, 0x10
            //   84c0                 | test                al, al
            //   7519                 | jne                 0x1b
            //   e9????????           |                     

        $sequence_4 = { 89c3 85c0 0f8525010000 8b442430 8d742428 f60001 0f8454ffffff }
            // n = 7, score = 100
            //   89c3                 | mov                 ebx, eax
            //   85c0                 | test                eax, eax
            //   0f8525010000         | jne                 0x12b
            //   8b442430             | mov                 eax, dword ptr [esp + 0x30]
            //   8d742428             | lea                 esi, [esp + 0x28]
            //   f60001               | test                byte ptr [eax], 1
            //   0f8454ffffff         | je                  0xffffff5a

        $sequence_5 = { 8b45f4 8a4df0 d3e8 89d7 8a4de4 09c7 8b75f4 }
            // n = 7, score = 100
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   8a4df0               | mov                 cl, byte ptr [ebp - 0x10]
            //   d3e8                 | shr                 eax, cl
            //   89d7                 | mov                 edi, edx
            //   8a4de4               | mov                 cl, byte ptr [ebp - 0x1c]
            //   09c7                 | or                  edi, eax
            //   8b75f4               | mov                 esi, dword ptr [ebp - 0xc]

        $sequence_6 = { 56 57 e8???????? 83c410 85c0 7510 50 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   57                   | push                edi
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   85c0                 | test                eax, eax
            //   7510                 | jne                 0x12
            //   50                   | push                eax

        $sequence_7 = { 53 83ec1c 8b5c2430 8b7c2438 8b6c243c 8b742440 85db }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   83ec1c               | sub                 esp, 0x1c
            //   8b5c2430             | mov                 ebx, dword ptr [esp + 0x30]
            //   8b7c2438             | mov                 edi, dword ptr [esp + 0x38]
            //   8b6c243c             | mov                 ebp, dword ptr [esp + 0x3c]
            //   8b742440             | mov                 esi, dword ptr [esp + 0x40]
            //   85db                 | test                ebx, ebx

        $sequence_8 = { 8b1f 89d8 0faf06 85c0 792c 56 57 }
            // n = 7, score = 100
            //   8b1f                 | mov                 ebx, dword ptr [edi]
            //   89d8                 | mov                 eax, ebx
            //   0faf06               | imul                eax, dword ptr [esi]
            //   85c0                 | test                eax, eax
            //   792c                 | jns                 0x2e
            //   56                   | push                esi
            //   57                   | push                edi

        $sequence_9 = { e8???????? eb09 50 57 56 56 e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   eb09                 | jmp                 0xb
            //   50                   | push                eax
            //   57                   | push                edi
            //   56                   | push                esi
            //   56                   | push                esi
            //   e8????????           |                     

    condition:
        7 of them and filesize < 196608
}