rule win_newcore_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.newcore_rat."
        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.newcore_rat"
        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 = { 85c0 741a 6a01 50 55 ff15???????? }
            // n = 6, score = 100
            //   85c0                 | test                eax, eax
            //   741a                 | je                  0x1c
            //   6a01                 | push                1
            //   50                   | push                eax
            //   55                   | push                ebp
            //   ff15????????         |                     

        $sequence_1 = { 85c0 7442 6a04 8d4c2418 51 6a4a 53 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   7442                 | je                  0x44
            //   6a04                 | push                4
            //   8d4c2418             | lea                 ecx, [esp + 0x18]
            //   51                   | push                ecx
            //   6a4a                 | push                0x4a
            //   53                   | push                ebx

        $sequence_2 = { 8b442418 8b4808 6a00 6a01 8d54241f 52 }
            // n = 6, score = 100
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   8b4808               | mov                 ecx, dword ptr [eax + 8]
            //   6a00                 | push                0
            //   6a01                 | push                1
            //   8d54241f             | lea                 edx, [esp + 0x1f]
            //   52                   | push                edx

        $sequence_3 = { 03c2 8bd3 c1f805 8bca 0fafc8 03c9 03c9 }
            // n = 7, score = 100
            //   03c2                 | add                 eax, edx
            //   8bd3                 | mov                 edx, ebx
            //   c1f805               | sar                 eax, 5
            //   8bca                 | mov                 ecx, edx
            //   0fafc8               | imul                ecx, eax
            //   03c9                 | add                 ecx, ecx
            //   03c9                 | add                 ecx, ecx

        $sequence_4 = { 85c0 748b 8d4c2418 e8???????? 8d4c2418 c7842478080000ffffffff e8???????? }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   748b                 | je                  0xffffff8d
            //   8d4c2418             | lea                 ecx, [esp + 0x18]
            //   e8????????           |                     
            //   8d4c2418             | lea                 ecx, [esp + 0x18]
            //   c7842478080000ffffffff     | mov    dword ptr [esp + 0x878], 0xffffffff
            //   e8????????           |                     

        $sequence_5 = { 8b8510100000 3bc3 7409 50 ffd6 899d10100000 8b850c100000 }
            // n = 7, score = 100
            //   8b8510100000         | mov                 eax, dword ptr [ebp + 0x1010]
            //   3bc3                 | cmp                 eax, ebx
            //   7409                 | je                  0xb
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   899d10100000         | mov                 dword ptr [ebp + 0x1010], ebx
            //   8b850c100000         | mov                 eax, dword ptr [ebp + 0x100c]

        $sequence_6 = { 8d942478140000 56 52 e8???????? 8b7c2458 83c410 }
            // n = 6, score = 100
            //   8d942478140000       | lea                 edx, [esp + 0x1478]
            //   56                   | push                esi
            //   52                   | push                edx
            //   e8????????           |                     
            //   8b7c2458             | mov                 edi, dword ptr [esp + 0x58]
            //   83c410               | add                 esp, 0x10

        $sequence_7 = { 8b4500 8b5038 6830020000 8d4c2458 51 8bcd }
            // n = 6, score = 100
            //   8b4500               | mov                 eax, dword ptr [ebp]
            //   8b5038               | mov                 edx, dword ptr [eax + 0x38]
            //   6830020000           | push                0x230
            //   8d4c2458             | lea                 ecx, [esp + 0x58]
            //   51                   | push                ecx
            //   8bcd                 | mov                 ecx, ebp

        $sequence_8 = { 8d442410 50 8bf9 55 897c2414 89742418 }
            // n = 6, score = 100
            //   8d442410             | lea                 eax, [esp + 0x10]
            //   50                   | push                eax
            //   8bf9                 | mov                 edi, ecx
            //   55                   | push                ebp
            //   897c2414             | mov                 dword ptr [esp + 0x14], edi
            //   89742418             | mov                 dword ptr [esp + 0x18], esi

        $sequence_9 = { 6858020000 8d4c241c 51 56 8984243c020000 c7450058020000 e8???????? }
            // n = 7, score = 100
            //   6858020000           | push                0x258
            //   8d4c241c             | lea                 ecx, [esp + 0x1c]
            //   51                   | push                ecx
            //   56                   | push                esi
            //   8984243c020000       | mov                 dword ptr [esp + 0x23c], eax
            //   c7450058020000       | mov                 dword ptr [ebp], 0x258
            //   e8????????           |                     

    condition:
        7 of them and filesize < 581632
}