rule win_pipemon_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.pipemon."
        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.pipemon"
        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 = { 458bc5 498bd7 488bc8 e8???????? 4885c0 7412 }
            // n = 6, score = 100
            //   458bc5               | dec                 eax
            //   498bd7               | lea                 ecx, [0x21363]
            //   488bc8               | test                eax, eax
            //   e8????????           |                     
            //   4885c0               | je                  0x80
            //   7412                 | dec                 eax

        $sequence_1 = { 8b4de0 e8???????? e9???????? 488d0541360100 4a8b04e8 42f644303840 7409 }
            // n = 7, score = 100
            //   8b4de0               | mov                 ecx, ebx
            //   e8????????           |                     
            //   e9????????           |                     
            //   488d0541360100       | dec                 eax
            //   4a8b04e8             | lea                 edx, [ebp + 0x400]
            //   42f644303840         | dec                 esp
            //   7409                 | lea                 eax, [ebp - 0x21]

        $sequence_2 = { 488d8d00030000 e8???????? 85c0 0f85b1000000 4c8d8500040000 }
            // n = 5, score = 100
            //   488d8d00030000       | lea                 edi, [0xffff0dce]
            //   e8????????           |                     
            //   85c0                 | dec                 ebp
            //   0f85b1000000         | mov                 esp, ecx
            //   4c8d8500040000       | dec                 ecx

        $sequence_3 = { 488d542468 488d4c2438 e8???????? 488b4c2438 e8???????? 498bc4 488b8d00080000 }
            // n = 7, score = 100
            //   488d542468           | sub                 esp, 0x20
            //   488d4c2438           | dec                 eax
            //   e8????????           |                     
            //   488b4c2438           | mov                 ebx, ecx
            //   e8????????           |                     
            //   498bc4               | dec                 eax
            //   488b8d00080000       | lea                 edi, [0xfffe700c]

        $sequence_4 = { 83caff 488d0d88470200 ff15???????? 85c0 751f }
            // n = 5, score = 100
            //   83caff               | inc                 ecx
            //   488d0d88470200       | pop                 esi
            //   ff15????????         |                     
            //   85c0                 | inc                 ecx
            //   751f                 | pop                 ebp

        $sequence_5 = { 33d2 33c9 ff15???????? 4c89642430 4489642428 }
            // n = 5, score = 100
            //   33d2                 | jne                 0xef
            //   33c9                 | dec                 eax
            //   ff15????????         |                     
            //   4c89642430           | lea                 eax, [0x15cb2]
            //   4489642428           | dec                 eax

        $sequence_6 = { 8801 48ffc1 4983e801 75ee }
            // n = 4, score = 100
            //   8801                 | sar                 esi, 6
            //   48ffc1               | dec                 esp
            //   4983e801             | lea                 ebp, [0x13966]
            //   75ee                 | and                 esi, 0x3f

        $sequence_7 = { 0f82b4010000 66ffc2 66413bd3 72d6 458bc7 410fb75a14 448b4d1c }
            // n = 7, score = 100
            //   0f82b4010000         | mov                 dword ptr [esi], edi
            //   66ffc2               | xor                 edx, edx
            //   66413bd3             | lea                 ecx, [edx + 2]
            //   72d6                 | jne                 0x56d
            //   458bc7               | jmp                 0x59d
            //   410fb75a14           | dec                 esp
            //   448b4d1c             | lea                 eax, [ebp - 0x24]

        $sequence_8 = { 488d3d2c3b0100 482bfe 8a041f 8803 48ffc3 4883ed01 75f2 }
            // n = 7, score = 100
            //   488d3d2c3b0100       | mov                 dword ptr [ebp - 8], eax
            //   482bfe               | mov                 eax, 4
            //   8a041f               | mov                 dword ptr [ebp - 0x30], eax
            //   8803                 | mov                 dword ptr [ebp - 0x2c], eax
            //   48ffc3               | dec                 eax
            //   4883ed01             | lea                 eax, [0x17625]
            //   75f2                 | dec                 eax

        $sequence_9 = { 8945fb 448d4004 ff15???????? 85c0 7576 }
            // n = 5, score = 100
            //   8945fb               | dec                 eax
            //   448d4004             | lea                 edx, [ebx + 8]
            //   ff15????????         |                     
            //   85c0                 | dec                 eax
            //   7576                 | mov                 ebx, ecx

    condition:
        7 of them and filesize < 389120
}