rule win_banjori_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        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 = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 53 53 8d45e4 50 ff75d8 53 ff75f8 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   8d45e4               | lea                 eax, [ebp - 0x1c]
            //   50                   | push                eax
            //   ff75d8               | push                dword ptr [ebp - 0x28]
            //   53                   | push                ebx
            //   ff75f8               | push                dword ptr [ebp - 8]

        $sequence_1 = { 68???????? 68???????? 68???????? ff75fc ff15???????? 83c410 ff75fc }
            // n = 7, score = 100
            //   68????????           |                     
            //   68????????           |                     
            //   68????????           |                     
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   ff15????????         |                     
            //   83c410               | add                 esp, 0x10
            //   ff75fc               | push                dword ptr [ebp - 4]

        $sequence_2 = { ff75f0 ff75f4 e8???????? 8945f4 836df002 8b4df4 }
            // n = 6, score = 100
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   ff75f4               | push                dword ptr [ebp - 0xc]
            //   e8????????           |                     
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   836df002             | sub                 dword ptr [ebp - 0x10], 2
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]

        $sequence_3 = { e8???????? 8b7da8 57 ff15???????? 03f8 8bc8 b05c }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8b7da8               | mov                 edi, dword ptr [ebp - 0x58]
            //   57                   | push                edi
            //   ff15????????         |                     
            //   03f8                 | add                 edi, eax
            //   8bc8                 | mov                 ecx, eax
            //   b05c                 | mov                 al, 0x5c

        $sequence_4 = { ff75f4 ff15???????? 83c703 b900020000 b02c f2ae 57 }
            // n = 7, score = 100
            //   ff75f4               | push                dword ptr [ebp - 0xc]
            //   ff15????????         |                     
            //   83c703               | add                 edi, 3
            //   b900020000           | mov                 ecx, 0x200
            //   b02c                 | mov                 al, 0x2c
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   57                   | push                edi

        $sequence_5 = { 83c107 51 e8???????? 8945e4 ff75e4 ff75e0 ff15???????? }
            // n = 7, score = 100
            //   83c107               | add                 ecx, 7
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   ff75e4               | push                dword ptr [ebp - 0x1c]
            //   ff75e0               | push                dword ptr [ebp - 0x20]
            //   ff15????????         |                     

        $sequence_6 = { 0f84ef000000 6800040000 8d8500fcffff 50 ff7508 }
            // n = 5, score = 100
            //   0f84ef000000         | je                  0xf5
            //   6800040000           | push                0x400
            //   8d8500fcffff         | lea                 eax, [ebp - 0x400]
            //   50                   | push                eax
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_7 = { 57 8d45fc 50 683f000f00 6a00 68???????? ff35???????? }
            // n = 7, score = 100
            //   57                   | push                edi
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   683f000f00           | push                0xf003f
            //   6a00                 | push                0
            //   68????????           |                     
            //   ff35????????         |                     

        $sequence_8 = { 85c0 0f8495020000 8945f8 8bf8 8b07 85c0 0f847e020000 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   0f8495020000         | je                  0x29b
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8bf8                 | mov                 edi, eax
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   85c0                 | test                eax, eax
            //   0f847e020000         | je                  0x284

        $sequence_9 = { 64793e 25733c2f62 6f 64793e 3c2f 6d 657373 }
            // n = 7, score = 100
            //   64793e               | jns                 0x41
            //   25733c2f62           | and                 eax, 0x622f3c73
            //   6f                   | outsd               dx, dword ptr [esi]
            //   64793e               | jns                 0x41
            //   3c2f                 | cmp                 al, 0x2f
            //   6d                   | insd                dword ptr es:[edi], dx
            //   657373               | jae                 0x76

    condition:
        7 of them and filesize < 139264
}