rule win_tinytyphon_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 50 8d4dfc 51 6a00 6806000200 6a00 }
            // n = 6, score = 200
            //   50                   | push                eax
            //   8d4dfc               | lea                 ecx, [ebp - 4]
            //   51                   | push                ecx
            //   6a00                 | push                0
            //   6806000200           | push                0x20006
            //   6a00                 | push                0

        $sequence_1 = { 50 8d95f0fdffff 52 6a01 a1???????? 50 8d8de0fbffff }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8d95f0fdffff         | lea                 edx, [ebp - 0x210]
            //   52                   | push                edx
            //   6a01                 | push                1
            //   a1????????           |                     
            //   50                   | push                eax
            //   8d8de0fbffff         | lea                 ecx, [ebp - 0x420]

        $sequence_2 = { ff15???????? 83c418 6898000000 6a00 8b550c 52 e8???????? }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   83c418               | add                 esp, 0x18
            //   6898000000           | push                0x98
            //   6a00                 | push                0
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   52                   | push                edx
            //   e8????????           |                     

        $sequence_3 = { ff15???????? 50 ff15???????? 8b85e8feffff 50 ff15???????? 8b8da0fdffff }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b85e8feffff         | mov                 eax, dword ptr [ebp - 0x118]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b8da0fdffff         | mov                 ecx, dword ptr [ebp - 0x260]

        $sequence_4 = { c7458800000000 c745e000000000 c645ac00 c645ad00 c645ae00 c645af00 c645b000 }
            // n = 7, score = 200
            //   c7458800000000       | mov                 dword ptr [ebp - 0x78], 0
            //   c745e000000000       | mov                 dword ptr [ebp - 0x20], 0
            //   c645ac00             | mov                 byte ptr [ebp - 0x54], 0
            //   c645ad00             | mov                 byte ptr [ebp - 0x53], 0
            //   c645ae00             | mov                 byte ptr [ebp - 0x52], 0
            //   c645af00             | mov                 byte ptr [ebp - 0x51], 0
            //   c645b000             | mov                 byte ptr [ebp - 0x50], 0

        $sequence_5 = { 668955fc 33c0 668945fc eb0c 668b4dfc 6683c101 66894dfc }
            // n = 7, score = 200
            //   668955fc             | mov                 word ptr [ebp - 4], dx
            //   33c0                 | xor                 eax, eax
            //   668945fc             | mov                 word ptr [ebp - 4], ax
            //   eb0c                 | jmp                 0xe
            //   668b4dfc             | mov                 cx, word ptr [ebp - 4]
            //   6683c101             | add                 cx, 1
            //   66894dfc             | mov                 word ptr [ebp - 4], cx

        $sequence_6 = { 0f94c0 50 e8???????? 83c404 c745fc00000000 c745ec00000000 c745f000000000 }
            // n = 7, score = 200
            //   0f94c0               | sete                al
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   c745ec00000000       | mov                 dword ptr [ebp - 0x14], 0
            //   c745f000000000       | mov                 dword ptr [ebp - 0x10], 0

        $sequence_7 = { eb09 8b4dc0 83e901 894dc0 837dc000 7c12 8b55c8 }
            // n = 7, score = 200
            //   eb09                 | jmp                 0xb
            //   8b4dc0               | mov                 ecx, dword ptr [ebp - 0x40]
            //   83e901               | sub                 ecx, 1
            //   894dc0               | mov                 dword ptr [ebp - 0x40], ecx
            //   837dc000             | cmp                 dword ptr [ebp - 0x40], 0
            //   7c12                 | jl                  0x14
            //   8b55c8               | mov                 edx, dword ptr [ebp - 0x38]

        $sequence_8 = { 0fb74dfc 0fb75510 3bca 7d0f 0fb745fc }
            // n = 5, score = 200
            //   0fb74dfc             | movzx               ecx, word ptr [ebp - 4]
            //   0fb75510             | movzx               edx, word ptr [ebp + 0x10]
            //   3bca                 | cmp                 ecx, edx
            //   7d0f                 | jge                 0x11
            //   0fb745fc             | movzx               eax, word ptr [ebp - 4]

        $sequence_9 = { 8b450c 8b4d0c 8a11 885050 8b450c 8b08 c1e908 }
            // n = 7, score = 200
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   8a11                 | mov                 dl, byte ptr [ecx]
            //   885050               | mov                 byte ptr [eax + 0x50], dl
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   c1e908               | shr                 ecx, 8

    condition:
        7 of them and filesize < 90112
}