rule win_miniasp_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.miniasp."
        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.miniasp"
        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 = { 8b4de4 e8???????? 83f801 7d12 }
            // n = 4, score = 100
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]
            //   e8????????           |                     
            //   83f801               | cmp                 eax, 1
            //   7d12                 | jge                 0x14

        $sequence_1 = { 740e 837db401 7417 837db402 }
            // n = 4, score = 100
            //   740e                 | je                  0x10
            //   837db401             | cmp                 dword ptr [ebp - 0x4c], 1
            //   7417                 | je                  0x19
            //   837db402             | cmp                 dword ptr [ebp - 0x4c], 2

        $sequence_2 = { 7430 ffb5f0fbffff 6a00 ff15???????? 50 ff15???????? c785d8fbffff40d64000 }
            // n = 7, score = 100
            //   7430                 | je                  0x32
            //   ffb5f0fbffff         | push                dword ptr [ebp - 0x410]
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   c785d8fbffff40d64000     | mov    dword ptr [ebp - 0x428], 0x40d640

        $sequence_3 = { ff703c 6a00 6a00 ff15???????? 8d85d8fbffff 50 8b85d4fbffff }
            // n = 7, score = 100
            //   ff703c               | push                dword ptr [eax + 0x3c]
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   8d85d8fbffff         | lea                 eax, [ebp - 0x428]
            //   50                   | push                eax
            //   8b85d4fbffff         | mov                 eax, dword ptr [ebp - 0x42c]

        $sequence_4 = { c745d015000000 6a00 6800000008 6a01 ff7514 ff7510 ff75d0 }
            // n = 7, score = 100
            //   c745d015000000       | mov                 dword ptr [ebp - 0x30], 0x15
            //   6a00                 | push                0
            //   6800000008           | push                0x8000000
            //   6a01                 | push                1
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff75d0               | push                dword ptr [ebp - 0x30]

        $sequence_5 = { 8b85d4fbffff 8b4004 ff7044 68???????? 8d85f0feffff 50 e8???????? }
            // n = 7, score = 100
            //   8b85d4fbffff         | mov                 eax, dword ptr [ebp - 0x42c]
            //   8b4004               | mov                 eax, dword ptr [eax + 4]
            //   ff7044               | push                dword ptr [eax + 0x44]
            //   68????????           |                     
            //   8d85f0feffff         | lea                 eax, [ebp - 0x110]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_6 = { 8845ef 8b4508 0345f0 0fbe4002 83f839 7f26 }
            // n = 6, score = 100
            //   8845ef               | mov                 byte ptr [ebp - 0x11], al
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   0345f0               | add                 eax, dword ptr [ebp - 0x10]
            //   0fbe4002             | movsx               eax, byte ptr [eax + 2]
            //   83f839               | cmp                 eax, 0x39
            //   7f26                 | jg                  0x28

        $sequence_7 = { 83c261 8b45fc 0345f8 8810 ebd9 8b45fc 034508 }
            // n = 7, score = 100
            //   83c261               | add                 edx, 0x61
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   0345f8               | add                 eax, dword ptr [ebp - 8]
            //   8810                 | mov                 byte ptr [eax], dl
            //   ebd9                 | jmp                 0xffffffdb
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   034508               | add                 eax, dword ptr [ebp + 8]

        $sequence_8 = { e8???????? 83c40c eb0f 68???????? ff75fc e8???????? 59 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   eb0f                 | jmp                 0x11
            //   68????????           |                     
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_9 = { 6a00 8b45f4 8b8880000000 e8???????? }
            // n = 4, score = 100
            //   6a00                 | push                0
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   8b8880000000         | mov                 ecx, dword ptr [eax + 0x80]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 139264
}