rule elf_satori_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects elf.satori."
        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.satori"
        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 = { ff442438 66c1c808 66894214 8b442420 66c1c808 66894102 8d4508 }
            // n = 7, score = 100
            //   ff442438             | inc                 dword ptr [esp + 0x38]
            //   66c1c808             | ror                 ax, 8
            //   66894214             | mov                 word ptr [edx + 0x14], ax
            //   8b442420             | mov                 eax, dword ptr [esp + 0x20]
            //   66c1c808             | ror                 ax, 8
            //   66894102             | mov                 word ptr [ecx + 2], ax
            //   8d4508               | lea                 eax, [ebp + 8]

        $sequence_1 = { 6a01 6a0e 56 53 e8???????? 88442456 }
            // n = 6, score = 100
            //   6a01                 | push                1
            //   6a0e                 | push                0xe
            //   56                   | push                esi
            //   53                   | push                ebx
            //   e8????????           |                     
            //   88442456             | mov                 byte ptr [esp + 0x56], al

        $sequence_2 = { 0fa39484b8080000 0f92c0 84c0 0f84ad110000 80bd3604000000 7492 81bd2404000000040000 }
            // n = 7, score = 100
            //   0fa39484b8080000     | bt                  dword ptr [esp + eax*4 + 0x8b8], edx
            //   0f92c0               | setb                al
            //   84c0                 | test                al, al
            //   0f84ad110000         | je                  0x11b3
            //   80bd3604000000       | cmp                 byte ptr [ebp + 0x436], 0
            //   7492                 | je                  0xffffff94
            //   81bd2404000000040000     | cmp    dword ptr [ebp + 0x424], 0x400

        $sequence_3 = { 8d5001 895304 8b54241c 66c1c808 0fb7c0 894704 8b441108 }
            // n = 7, score = 100
            //   8d5001               | lea                 edx, [eax + 1]
            //   895304               | mov                 dword ptr [ebx + 4], edx
            //   8b54241c             | mov                 edx, dword ptr [esp + 0x1c]
            //   66c1c808             | ror                 ax, 8
            //   0fb7c0               | movzx               eax, ax
            //   894704               | mov                 dword ptr [edi + 4], eax
            //   8b441108             | mov                 eax, dword ptr [ecx + edx + 8]

        $sequence_4 = { 034510 83e1fc 8d3c0e 897ddc 39c7 7628 6a00 }
            // n = 7, score = 100
            //   034510               | add                 eax, dword ptr [ebp + 0x10]
            //   83e1fc               | and                 ecx, 0xfffffffc
            //   8d3c0e               | lea                 edi, [esi + ecx]
            //   897ddc               | mov                 dword ptr [ebp - 0x24], edi
            //   39c7                 | cmp                 edi, eax
            //   7628                 | jbe                 0x2a
            //   6a00                 | push                0

        $sequence_5 = { fc 8dbc2438090000 31c0 ab ab ab ab }
            // n = 7, score = 100
            //   fc                   | cld                 
            //   8dbc2438090000       | lea                 edi, [esp + 0x938]
            //   31c0                 | xor                 eax, eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax

        $sequence_6 = { 56 6a06 6a03 6a02 e8???????? 83c410 83f8ff }
            // n = 7, score = 100
            //   56                   | push                esi
            //   6a06                 | push                6
            //   6a03                 | push                3
            //   6a02                 | push                2
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   83f8ff               | cmp                 eax, -1

        $sequence_7 = { e8???????? 01c5 83c410 e9???????? 80f978 750f 8b442408 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   01c5                 | add                 ebp, eax
            //   83c410               | add                 esp, 0x10
            //   e9????????           |                     
            //   80f978               | cmp                 cl, 0x78
            //   750f                 | jne                 0x11
            //   8b442408             | mov                 eax, dword ptr [esp + 8]

        $sequence_8 = { 31db 42 83fe06 7f08 8a4202 41 84c0 }
            // n = 7, score = 100
            //   31db                 | xor                 ebx, ebx
            //   42                   | inc                 edx
            //   83fe06               | cmp                 esi, 6
            //   7f08                 | jg                  0xa
            //   8a4202               | mov                 al, byte ptr [edx + 2]
            //   41                   | inc                 ecx
            //   84c0                 | test                al, al

        $sequence_9 = { 83ec0c 57 e8???????? 83c410 83ec0c ff742414 e8???????? }
            // n = 7, score = 100
            //   83ec0c               | sub                 esp, 0xc
            //   57                   | push                edi
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   83ec0c               | sub                 esp, 0xc
            //   ff742414             | push                dword ptr [esp + 0x14]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 122880
}