rule win_quantloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.quantloader."
        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.quantloader"
        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 = { 89e5 83ec28 c745fc01000000 8d45f8 89442408 }
            // n = 5, score = 500
            //   89e5                 | mov                 ebp, esp
            //   83ec28               | sub                 esp, 0x28
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   89442408             | mov                 dword ptr [esp + 8], eax

        $sequence_1 = { c744240800000000 8b4510 89442404 8b45fc 890424 }
            // n = 5, score = 500
            //   c744240800000000     | mov                 dword ptr [esp + 8], 0
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   89442404             | mov                 dword ptr [esp + 4], eax
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   890424               | mov                 dword ptr [esp], eax

        $sequence_2 = { 89442410 c744240c19010200 c744240800000000 8b450c 89442404 8b4508 890424 }
            // n = 7, score = 500
            //   89442410             | mov                 dword ptr [esp + 0x10], eax
            //   c744240c19010200     | mov                 dword ptr [esp + 0xc], 0x20119
            //   c744240800000000     | mov                 dword ptr [esp + 8], 0
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   89442404             | mov                 dword ptr [esp + 4], eax
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   890424               | mov                 dword ptr [esp], eax

        $sequence_3 = { c744240800040000 c7442404???????? 8b45f8 890424 e8???????? 83ec10 }
            // n = 6, score = 500
            //   c744240800040000     | mov                 dword ptr [esp + 8], 0x400
            //   c7442404????????     |                     
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   890424               | mov                 dword ptr [esp], eax
            //   e8????????           |                     
            //   83ec10               | sub                 esp, 0x10

        $sequence_4 = { 817d0c00704000 7467 8b4508 803800 }
            // n = 4, score = 500
            //   817d0c00704000       | cmp                 dword ptr [ebp + 0xc], 0x407000
            //   7467                 | je                  0x69
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   803800               | cmp                 byte ptr [eax], 0

        $sequence_5 = { e8???????? c744240800010000 c744240400000000 c70424???????? e8???????? e8???????? 89442404 }
            // n = 7, score = 500
            //   e8????????           |                     
            //   c744240800010000     | mov                 dword ptr [esp + 8], 0x100
            //   c744240400000000     | mov                 dword ptr [esp + 4], 0
            //   c70424????????       |                     
            //   e8????????           |                     
            //   e8????????           |                     
            //   89442404             | mov                 dword ptr [esp + 4], eax

        $sequence_6 = { e8???????? 0fb6c0 83f801 7527 8d85f8fdffff 890424 }
            // n = 6, score = 500
            //   e8????????           |                     
            //   0fb6c0               | movzx               eax, al
            //   83f801               | cmp                 eax, 1
            //   7527                 | jne                 0x29
            //   8d85f8fdffff         | lea                 eax, [ebp - 0x208]
            //   890424               | mov                 dword ptr [esp], eax

        $sequence_7 = { c7042401000080 e8???????? c744240400000000 c70424???????? e8???????? }
            // n = 5, score = 500
            //   c7042401000080       | mov                 dword ptr [esp], 0x80000001
            //   e8????????           |                     
            //   c744240400000000     | mov                 dword ptr [esp + 4], 0
            //   c70424????????       |                     
            //   e8????????           |                     

        $sequence_8 = { c3 60 ff553c 8bd8 8b7554 8b4558 }
            // n = 6, score = 100
            //   c3                   | ret                 
            //   60                   | pushal              
            //   ff553c               | call                dword ptr [ebp + 0x3c]
            //   8bd8                 | mov                 ebx, eax
            //   8b7554               | mov                 esi, dword ptr [ebp + 0x54]
            //   8b4558               | mov                 eax, dword ptr [ebp + 0x58]

        $sequence_9 = { 4e ebec 8d5efe 84ff 75f0 8b763a 66ba5045 }
            // n = 7, score = 100
            //   4e                   | dec                 esi
            //   ebec                 | jmp                 0xffffffee
            //   8d5efe               | lea                 ebx, [esi - 2]
            //   84ff                 | test                bh, bh
            //   75f0                 | jne                 0xfffffff2
            //   8b763a               | mov                 esi, dword ptr [esi + 0x3a]
            //   66ba5045             | mov                 dx, 0x4550

        $sequence_10 = { ff30 6800100000 57 81042400100000 ff550c ff550c 5a }
            // n = 7, score = 100
            //   ff30                 | push                dword ptr [eax]
            //   6800100000           | push                0x1000
            //   57                   | push                edi
            //   81042400100000       | add                 dword ptr [esp], 0x1000
            //   ff550c               | call                dword ptr [ebp + 0xc]
            //   ff550c               | call                dword ptr [ebp + 0xc]
            //   5a                   | pop                 edx

        $sequence_11 = { 60 837d5400 740f e8???????? 8b7d5c 85ff 7403 }
            // n = 7, score = 100
            //   60                   | pushal              
            //   837d5400             | cmp                 dword ptr [ebp + 0x54], 0
            //   740f                 | je                  0x11
            //   e8????????           |                     
            //   8b7d5c               | mov                 edi, dword ptr [ebp + 0x5c]
            //   85ff                 | test                edi, edi
            //   7403                 | je                  5

        $sequence_12 = { 89442420 8bf8 8d0cbd08000000 64a118000000 8b702c 51 6808000c00 }
            // n = 7, score = 100
            //   89442420             | mov                 dword ptr [esp + 0x20], eax
            //   8bf8                 | mov                 edi, eax
            //   8d0cbd08000000       | lea                 ecx, [edi*4 + 8]
            //   64a118000000         | mov                 eax, dword ptr fs:[0x18]
            //   8b702c               | mov                 esi, dword ptr [eax + 0x2c]
            //   51                   | push                ecx
            //   6808000c00           | push                0xc0008

        $sequence_13 = { ff5518 81c424020000 8974241c 61 c3 60 }
            // n = 6, score = 100
            //   ff5518               | call                dword ptr [ebp + 0x18]
            //   81c424020000         | add                 esp, 0x224
            //   8974241c             | mov                 dword ptr [esp + 0x1c], esi
            //   61                   | popal               
            //   c3                   | ret                 
            //   60                   | pushal              

        $sequence_14 = { 8f4550 e8???????? 8f411c 61 c3 }
            // n = 5, score = 100
            //   8f4550               | pop                 dword ptr [ebp + 0x50]
            //   e8????????           |                     
            //   8f411c               | pop                 dword ptr [ecx + 0x1c]
            //   61                   | popal               
            //   c3                   | ret                 

        $sequence_15 = { 50 ff742414 ff5508 ab ebe0 }
            // n = 5, score = 100
            //   50                   | push                eax
            //   ff742414             | push                dword ptr [esp + 0x14]
            //   ff5508               | call                dword ptr [ebp + 8]
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ebe0                 | jmp                 0xffffffe2

    condition:
        7 of them and filesize < 155648
}