rule win_moriagent_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.moriagent."
        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.moriagent"
        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 = { eb0c b802000000 eb05 b801000000 33ff }
            // n = 5, score = 200
            //   eb0c                 | jmp                 0xe
            //   b802000000           | mov                 eax, 2
            //   eb05                 | jmp                 7
            //   b801000000           | mov                 eax, 1
            //   33ff                 | xor                 edi, edi

        $sequence_1 = { ba01000000 498bcc 0f85e8000000 e8???????? }
            // n = 4, score = 100
            //   ba01000000           | shl                 edx, cl
            //   498bcc               | dec                 eax
            //   0f85e8000000         | shr                 eax, 3
            //   e8????????           |                     

        $sequence_2 = { 895508 8b7810 8b4910 897dfc 3bf9 }
            // n = 5, score = 100
            //   895508               | mov                 dword ptr [ebp + 8], edx
            //   8b7810               | mov                 edi, dword ptr [eax + 0x10]
            //   8b4910               | mov                 ecx, dword ptr [ecx + 0x10]
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   3bf9                 | cmp                 edi, ecx

        $sequence_3 = { ba01000000 498bcc 0f8580000000 e8???????? }
            // n = 4, score = 100
            //   ba01000000           | mov                 eax, edx
            //   498bcc               | shl                 edx, cl
            //   0f8580000000         | dec                 eax
            //   e8????????           |                     

        $sequence_4 = { ba01000000 488d4d77 e8???????? e9???????? 83650f00 488d05a44fffff }
            // n = 6, score = 100
            //   ba01000000           | mov                 edx, 1
            //   488d4d77             | dec                 eax
            //   e8????????           |                     
            //   e9????????           |                     
            //   83650f00             | lea                 ecx, [ebp + 0x77]
            //   488d05a44fffff       | and                 dword ptr [ebp + 0xf], 0

        $sequence_5 = { 7507 b802000000 eb0e 83c8ff }
            // n = 4, score = 100
            //   7507                 | jne                 9
            //   b802000000           | mov                 eax, 2
            //   eb0e                 | jmp                 0x10
            //   83c8ff               | or                  eax, 0xffffffff

        $sequence_6 = { e9???????? 8d8dccfeffff e9???????? 8d8d48ffffff e9???????? 8d8de4feffff }
            // n = 6, score = 100
            //   e9????????           |                     
            //   8d8dccfeffff         | lea                 ecx, [ebp - 0x134]
            //   e9????????           |                     
            //   8d8d48ffffff         | lea                 ecx, [ebp - 0xb8]
            //   e9????????           |                     
            //   8d8de4feffff         | lea                 ecx, [ebp - 0x11c]

        $sequence_7 = { 8bc2 c1e81f 03c2 8945ec 3daaaaaa0a 0f8473010000 8b4b08 }
            // n = 7, score = 100
            //   8bc2                 | mov                 eax, edx
            //   c1e81f               | shr                 eax, 0x1f
            //   03c2                 | add                 eax, edx
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax
            //   3daaaaaa0a           | cmp                 eax, 0xaaaaaaa
            //   0f8473010000         | je                  0x179
            //   8b4b08               | mov                 ecx, dword ptr [ebx + 8]

        $sequence_8 = { 50 e8???????? 83a60084420000 59 83c604 }
            // n = 5, score = 100
            //   50                   | push                eax
            //   e8????????           |                     
            //   83a60084420000       | and                 dword ptr [esi + 0x428400], 0
            //   59                   | pop                 ecx
            //   83c604               | add                 esi, 4

        $sequence_9 = { ba01000000 498bcc e8???????? 90 }
            // n = 4, score = 100
            //   ba01000000           | dec                 ecx
            //   498bcc               | mov                 ecx, esp
            //   e8????????           |                     
            //   90                   | jne                 0x89

        $sequence_10 = { ba01000000 498bc0 d3e2 48c1e803 }
            // n = 4, score = 100
            //   ba01000000           | and                 dword ptr [ebp + 0xf], 0
            //   498bc0               | dec                 eax
            //   d3e2                 | lea                 eax, [0xffff4fa4]
            //   48c1e803             | dec                 eax

        $sequence_11 = { e8???????? 83c408 8b45dc 3b45e0 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]
            //   3b45e0               | cmp                 eax, dword ptr [ebp - 0x20]

        $sequence_12 = { ba01000000 663908 410f42d3 85d2 }
            // n = 4, score = 100
            //   ba01000000           | dec                 ecx
            //   663908               | mov                 ecx, esp
            //   410f42d3             | jne                 0xf1
            //   85d2                 | nop                 

        $sequence_13 = { c3 53 0fb75e06 33c0 33c9 895df8 663bc3 }
            // n = 7, score = 100
            //   c3                   | ret                 
            //   53                   | push                ebx
            //   0fb75e06             | movzx               ebx, word ptr [esi + 6]
            //   33c0                 | xor                 eax, eax
            //   33c9                 | xor                 ecx, ecx
            //   895df8               | mov                 dword ptr [ebp - 8], ebx
            //   663bc3               | cmp                 ax, bx

        $sequence_14 = { ba01000000 89542420 83ff7f 7740 }
            // n = 4, score = 100
            //   ba01000000           | lea                 ecx, [ebp + 0x58]
            //   89542420             | mov                 edx, 1
            //   83ff7f               | dec                 ecx
            //   7740                 | mov                 ecx, esp

    condition:
        7 of them and filesize < 1347904
}