rule win_tinytyphon_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.tinytyphon."
        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.tinytyphon"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 8d8c08d9026f67 894ddc 8b55dc c1e20e 8b45dc }
            // n = 5, score = 200
            //   8d8c08d9026f67       | lea                 ecx, [eax + ecx + 0x676f02d9]
            //   894ddc               | mov                 dword ptr [ebp - 0x24], ecx
            //   8b55dc               | mov                 edx, dword ptr [ebp - 0x24]
            //   c1e20e               | shl                 edx, 0xe
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]

        $sequence_1 = { 8b4508 8b08 894df8 8b55f8 035510 81e2ffffff1f 8b4508 }
            // n = 7, score = 200
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   035510               | add                 edx, dword ptr [ebp + 0x10]
            //   81e2ffffff1f         | and                 edx, 0x1fffffff
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_2 = { 8b55f8 c1ea19 0bca 894df8 8b45f8 0345e4 8945f8 }
            // n = 7, score = 200
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   c1ea19               | shr                 edx, 0x19
            //   0bca                 | or                  ecx, edx
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   0345e4               | add                 eax, dword ptr [ebp - 0x1c]
            //   8945f8               | mov                 dword ptr [ebp - 8], eax

        $sequence_3 = { 034164 8b55e0 8d840292cc0c8f 8945e0 8b4de0 c1e10a }
            // n = 6, score = 200
            //   034164               | add                 eax, dword ptr [ecx + 0x64]
            //   8b55e0               | mov                 edx, dword ptr [ebp - 0x20]
            //   8d840292cc0c8f       | lea                 eax, [edx + eax - 0x70f3336e]
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]
            //   c1e10a               | shl                 ecx, 0xa

        $sequence_4 = { 8d8c082211906b 894df8 8b55f8 c1e207 8b45f8 c1e819 0bd0 }
            // n = 7, score = 200
            //   8d8c082211906b       | lea                 ecx, [eax + ecx + 0x6b901122]
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   c1e207               | shl                 edx, 7
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   c1e819               | shr                 eax, 0x19
            //   0bd0                 | or                  edx, eax

        $sequence_5 = { c1e10a 8b55e0 c1ea16 0bca 894de0 8b45e0 }
            // n = 6, score = 200
            //   c1e10a               | shl                 ecx, 0xa
            //   8b55e0               | mov                 edx, dword ptr [ebp - 0x20]
            //   c1ea16               | shr                 edx, 0x16
            //   0bca                 | or                  ecx, edx
            //   894de0               | mov                 dword ptr [ebp - 0x20], ecx
            //   8b45e0               | mov                 eax, dword ptr [ebp - 0x20]

        $sequence_6 = { 7d1e 8b4dc8 8b55d4 8a02 8801 8b4dc8 83c101 }
            // n = 7, score = 200
            //   7d1e                 | jge                 0x20
            //   8b4dc8               | mov                 ecx, dword ptr [ebp - 0x38]
            //   8b55d4               | mov                 edx, dword ptr [ebp - 0x2c]
            //   8a02                 | mov                 al, byte ptr [edx]
            //   8801                 | mov                 byte ptr [ecx], al
            //   8b4dc8               | mov                 ecx, dword ptr [ebp - 0x38]
            //   83c101               | add                 ecx, 1

        $sequence_7 = { 6800380000 ff15???????? ebd5 33c0 837df401 0f94c0 50 }
            // n = 7, score = 200
            //   6800380000           | push                0x3800
            //   ff15????????         |                     
            //   ebd5                 | jmp                 0xffffffd7
            //   33c0                 | xor                 eax, eax
            //   837df401             | cmp                 dword ptr [ebp - 0xc], 1
            //   0f94c0               | sete                al
            //   50                   | push                eax

        $sequence_8 = { 8b8de8feffff 51 ff15???????? 85c0 7557 8b9598fdffff 52 }
            // n = 7, score = 200
            //   8b8de8feffff         | mov                 ecx, dword ptr [ebp - 0x118]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7557                 | jne                 0x59
            //   8b9598fdffff         | mov                 edx, dword ptr [ebp - 0x268]
            //   52                   | push                edx

        $sequence_9 = { e8???????? 83c404 837dfc03 7c23 837df000 741d ff15???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   837dfc03             | cmp                 dword ptr [ebp - 4], 3
            //   7c23                 | jl                  0x25
            //   837df000             | cmp                 dword ptr [ebp - 0x10], 0
            //   741d                 | je                  0x1f
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 90112
}