rule win_banjori_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        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 = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 7369 27 206964 3d27257327 206d69 6d 652d74797065 }
            // n = 7, score = 100
            //   7369                 | jae                 0x6b
            //   27                   | daa                 
            //   206964               | and                 byte ptr [ecx + 0x64], ch
            //   3d27257327           | cmp                 eax, 0x27732527
            //   206d69               | and                 byte ptr [ebp + 0x69], ch
            //   6d                   | insd                dword ptr es:[edi], dx
            //   652d74797065         | sub                 eax, 0x65707974

        $sequence_1 = { 33c0 8b4df8 8ac5 50 ff15???????? 6880000000 6a40 }
            // n = 7, score = 100
            //   33c0                 | xor                 eax, eax
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   8ac5                 | mov                 al, ch
            //   50                   | push                eax
            //   ff15????????         |                     
            //   6880000000           | push                0x80
            //   6a40                 | push                0x40

        $sequence_2 = { ff15???????? ff75f0 ff15???????? 6803800000 50 ff75f0 e8???????? }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   ff15????????         |                     
            //   6803800000           | push                0x8003
            //   50                   | push                eax
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   e8????????           |                     

        $sequence_3 = { ff15???????? ebe1 e8???????? a1???????? e9???????? 55 8bec }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   ebe1                 | jmp                 0xffffffe3
            //   e8????????           |                     
            //   a1????????           |                     
            //   e9????????           |                     
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp

        $sequence_4 = { ff75fc 53 53 53 ff75d8 68???????? }
            // n = 6, score = 100
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   ff75d8               | push                dword ptr [ebp - 0x28]
            //   68????????           |                     

        $sequence_5 = { ff75f8 57 ff15???????? ff75f8 e8???????? 8bc7 5f }
            // n = 7, score = 100
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   57                   | push                edi
            //   ff15????????         |                     
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   e8????????           |                     
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi

        $sequence_6 = { 8d3dac169500 57 ff15???????? 40 50 57 6a01 }
            // n = 7, score = 100
            //   8d3dac169500         | lea                 edi, [0x9516ac]
            //   57                   | push                edi
            //   ff15????????         |                     
            //   40                   | inc                 eax
            //   50                   | push                eax
            //   57                   | push                edi
            //   6a01                 | push                1

        $sequence_7 = { 8945e0 0500020000 8945dc 0500020000 8945d4 0500040000 }
            // n = 6, score = 100
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   0500020000           | add                 eax, 0x200
            //   8945dc               | mov                 dword ptr [ebp - 0x24], eax
            //   0500020000           | add                 eax, 0x200
            //   8945d4               | mov                 dword ptr [ebp - 0x2c], eax
            //   0500040000           | add                 eax, 0x400

        $sequence_8 = { c1e010 0bc1 8b550c 3902 7506 8b4508 894204 }
            // n = 7, score = 100
            //   c1e010               | shl                 eax, 0x10
            //   0bc1                 | or                  eax, ecx
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   3902                 | cmp                 dword ptr [edx], eax
            //   7506                 | jne                 8
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   894204               | mov                 dword ptr [edx + 4], eax

        $sequence_9 = { 53 50 68???????? ff75c8 ff15???????? ff75c8 ff15???????? }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   50                   | push                eax
            //   68????????           |                     
            //   ff75c8               | push                dword ptr [ebp - 0x38]
            //   ff15????????         |                     
            //   ff75c8               | push                dword ptr [ebp - 0x38]
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 139264
}