rule win_banjori_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.banjori."
        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.banjori"
        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 = { ff15???????? 8945fc 8945f0 8b4df4 014df0 e9???????? ff4de0 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   014df0               | add                 dword ptr [ebp - 0x10], ecx
            //   e9????????           |                     
            //   ff4de0               | dec                 dword ptr [ebp - 0x20]

        $sequence_1 = { 25733a2573 3a25???????? 3a25???????? 3a25???????? 3a25???????? 3030 3030 }
            // n = 7, score = 100
            //   25733a2573           | and                 eax, 0x73253a73
            //   3a25????????         |                     
            //   3a25????????         |                     
            //   3a25????????         |                     
            //   3a25????????         |                     
            //   3030                 | xor                 byte ptr [eax], dh
            //   3030                 | xor                 byte ptr [eax], dh

        $sequence_2 = { 8b3d???????? 83c750 8d45e0 50 6a40 6a01 }
            // n = 6, score = 100
            //   8b3d????????         |                     
            //   83c750               | add                 edi, 0x50
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   50                   | push                eax
            //   6a40                 | push                0x40
            //   6a01                 | push                1

        $sequence_3 = { c3 55 8bec 83c4f8 57 53 33db }
            // n = 7, score = 100
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   83c4f8               | add                 esp, -8
            //   57                   | push                edi
            //   53                   | push                ebx
            //   33db                 | xor                 ebx, ebx

        $sequence_4 = { ff15???????? 83c004 50 6a40 ff15???????? 8945d8 ff35???????? }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   83c004               | add                 eax, 4
            //   50                   | push                eax
            //   6a40                 | push                0x40
            //   ff15????????         |                     
            //   8945d8               | mov                 dword ptr [ebp - 0x28], eax
            //   ff35????????         |                     

        $sequence_5 = { b804000000 e8???????? 8d8d34feffff b808000000 e8???????? 8d8d4cfeffff }
            // n = 6, score = 100
            //   b804000000           | mov                 eax, 4
            //   e8????????           |                     
            //   8d8d34feffff         | lea                 ecx, [ebp - 0x1cc]
            //   b808000000           | mov                 eax, 8
            //   e8????????           |                     
            //   8d8d4cfeffff         | lea                 ecx, [ebp - 0x1b4]

        $sequence_6 = { ff15???????? ff75e4 e8???????? 395d1c 743d 68???????? ff75e0 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   ff75e4               | push                dword ptr [ebp - 0x1c]
            //   e8????????           |                     
            //   395d1c               | cmp                 dword ptr [ebp + 0x1c], ebx
            //   743d                 | je                  0x3f
            //   68????????           |                     
            //   ff75e0               | push                dword ptr [ebp - 0x20]

        $sequence_7 = { 7507 83e907 836df807 f3a4 8b7df0 33c9 391f }
            // n = 7, score = 100
            //   7507                 | jne                 9
            //   83e907               | sub                 ecx, 7
            //   836df807             | sub                 dword ptr [ebp - 8], 7
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   8b7df0               | mov                 edi, dword ptr [ebp - 0x10]
            //   33c9                 | xor                 ecx, ecx
            //   391f                 | cmp                 dword ptr [edi], ebx

        $sequence_8 = { e32a 68???????? ff7508 e8???????? 85c0 0f85af000000 68???????? }
            // n = 7, score = 100
            //   e32a                 | jecxz               0x2c
            //   68????????           |                     
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f85af000000         | jne                 0xb5
            //   68????????           |                     

        $sequence_9 = { 7417 53 6a0a ffb5ecfbffff ffb5f0fbffff 6aff ff15???????? }
            // n = 7, score = 100
            //   7417                 | je                  0x19
            //   53                   | push                ebx
            //   6a0a                 | push                0xa
            //   ffb5ecfbffff         | push                dword ptr [ebp - 0x414]
            //   ffb5f0fbffff         | push                dword ptr [ebp - 0x410]
            //   6aff                 | push                -1
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 139264
}