rule elf_bashlite_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects elf.bashlite."
        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.bashlite"
        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 = { eb0a c785ecefffff00000000 8b85ecefffff c9 c3 }
            // n = 5, score = 300
            //   eb0a                 | js                  0x55
            //   c785ecefffff00000000     | and    word ptr [ebp], 0x2000
            //   8b85ecefffff         | test                eax, eax
            //   c9                   | mov                 ecx, eax
            //   c3                   | js                  0x15b

        $sequence_1 = { 750c c785ecefffff01000000 eb0a c785ecefffff00000000 8b85ecefffff c9 c3 }
            // n = 7, score = 300
            //   750c                 | dec                 esp
            //   c785ecefffff01000000     | mov    edx, eax
            //   eb0a                 | jmp                 0x7df
            //   c785ecefffff00000000     | dec    esp
            //   8b85ecefffff         | cmp                 eax, ecx
            //   c9                   | dec                 ecx
            //   c3                   | cmovae              eax, eax

        $sequence_2 = { 31c0 eb19 e8???????? c70016000000 e8???????? c70016000000 83c8ff }
            // n = 7, score = 300
            //   31c0                 | cmp                 dword ptr [ebp - 0x11c], 1
            //   eb19                 | je                  0x3a6
            //   e8????????           |                     
            //   c70016000000         | cmp                 dword ptr [ebp - 0x11c], 2
            //   e8????????           |                     
            //   c70016000000         | je                  0x508
            //   83c8ff               | movzx               eax, byte ptr [edx + eax*8 + 4]

        $sequence_3 = { e8???????? 89c2 89d0 c1e81f 01d0 d1f8 }
            // n = 6, score = 300
            //   e8????????           |                     
            //   89c2                 | dec                 eax
            //   89d0                 | mov                 edi, ebx
            //   c1e81f               | dec                 eax
            //   01d0                 | lea                 esi, [ebp - 0x221]
            //   d1f8                 | mov                 edi, dword ptr [ebp - 0x20]

        $sequence_4 = { c785ecefffff01000000 eb0a c785ecefffff00000000 8b85ecefffff }
            // n = 4, score = 300
            //   c785ecefffff01000000     | mov    eax, dword ptr [ebp - 0x38]
            //   eb0a                 | mov                 dword ptr [ebp - 0x3c], eax
            //   c785ecefffff00000000     | dec    eax
            //   8b85ecefffff         | mov                 eax, dword ptr [ebp - 0x20]

        $sequence_5 = { 750c c785ecefffff01000000 eb0a c785ecefffff00000000 8b85ecefffff }
            // n = 5, score = 300
            //   750c                 | lea                 eax, [edi + ebp]
            //   c785ecefffff01000000     | cmp    esi, eax
            //   eb0a                 | je                  0x364
            //   c785ecefffff00000000     | dec    eax
            //   8b85ecefffff         | inc                 eax

        $sequence_6 = { 89c2 89d0 c1e81f 01d0 }
            // n = 4, score = 300
            //   89c2                 | mov                 eax, dword ptr [ebp - 0x38]
            //   89d0                 | mov                 al, byte ptr [eax]
            //   c1e81f               | cmp                 al, 0x21
            //   01d0                 | mov                 dword ptr [ebp - 0x38], eax

        $sequence_7 = { 750c c785ecefffff01000000 eb0a c785ecefffff00000000 }
            // n = 4, score = 300
            //   750c                 | mov                 word ptr [ebp - 0x1e], ax
            //   c785ecefffff01000000     | mov    word ptr [ebp - 0x20], 2
            //   eb0a                 | mov                 edx, 6
            //   c785ecefffff00000000     | mov    esi, 1

        $sequence_8 = { 83f8ff 750c e8???????? 8b00 83f873 }
            // n = 5, score = 300
            //   83f8ff               | sub                 esp, 0xc
            //   750c                 | push                eax
            //   e8????????           |                     
            //   8b00                 | add                 esp, 0x10
            //   83f873               | and                 eax, dword ptr [ebp + 8]

        $sequence_9 = { eb19 e8???????? c70016000000 e8???????? c70016000000 83c8ff }
            // n = 6, score = 300
            //   eb19                 | mov                 eax, dword ptr [ebp - 0x30]
            //   e8????????           |                     
            //   c70016000000         | dec                 eax
            //   e8????????           |                     
            //   c70016000000         | mov                 edx, dword ptr [ebp - 0x40]
            //   83c8ff               | dec                 eax

    condition:
        7 of them and filesize < 2310144
}