rule win_havex_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.havex_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.havex_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 = { c1e704 03fe 038f94c90000 039798c90000 8b7ddc 0fb77c7b5e 897de0 }
            // n = 7, score = 100
            //   c1e704               | shl                 edi, 4
            //   03fe                 | add                 edi, esi
            //   038f94c90000         | add                 ecx, dword ptr [edi + 0xc994]
            //   039798c90000         | add                 edx, dword ptr [edi + 0xc998]
            //   8b7ddc               | mov                 edi, dword ptr [ebp - 0x24]
            //   0fb77c7b5e           | movzx               edi, word ptr [ebx + edi*2 + 0x5e]
            //   897de0               | mov                 dword ptr [ebp - 0x20], edi

        $sequence_1 = { 5e ff75e4 8b4508 8d8dd8feffff e8???????? 59 5f }
            // n = 7, score = 100
            //   5e                   | pop                 esi
            //   ff75e4               | push                dword ptr [ebp - 0x1c]
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8d8dd8feffff         | lea                 ecx, [ebp - 0x128]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   5f                   | pop                 edi

        $sequence_2 = { 8b937c1e0000 8d0413 8a8c387c0e0000 8945f4 884dab 83ff03 767a }
            // n = 7, score = 100
            //   8b937c1e0000         | mov                 edx, dword ptr [ebx + 0x1e7c]
            //   8d0413               | lea                 eax, [ebx + edx]
            //   8a8c387c0e0000       | mov                 cl, byte ptr [eax + edi + 0xe7c]
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   884dab               | mov                 byte ptr [ebp - 0x55], cl
            //   83ff03               | cmp                 edi, 3
            //   767a                 | jbe                 0x7c

        $sequence_3 = { 8b74240c 81fe0b010000 0f8f70010000 0f84da000000 81fed4000000 0f87b9040000 0fb686b8150210 }
            // n = 7, score = 100
            //   8b74240c             | mov                 esi, dword ptr [esp + 0xc]
            //   81fe0b010000         | cmp                 esi, 0x10b
            //   0f8f70010000         | jg                  0x176
            //   0f84da000000         | je                  0xe0
            //   81fed4000000         | cmp                 esi, 0xd4
            //   0f87b9040000         | ja                  0x4bf
            //   0fb686b8150210       | movzx               eax, byte ptr [esi + 0x100215b8]

        $sequence_4 = { e8???????? 8365fc00 ff7510 8d4e18 c706???????? }
            // n = 5, score = 100
            //   e8????????           |                     
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   8d4e18               | lea                 ecx, [esi + 0x18]
            //   c706????????         |                     

        $sequence_5 = { 6800100000 8d3c00 57 53 ff7508 ff15???????? 8bd8 }
            // n = 7, score = 100
            //   6800100000           | push                0x1000
            //   8d3c00               | lea                 edi, [eax + eax]
            //   57                   | push                edi
            //   53                   | push                ebx
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax

        $sequence_6 = { 7704 83661800 ff4e1c 7504 83661800 c3 8b461c }
            // n = 7, score = 100
            //   7704                 | ja                  6
            //   83661800             | and                 dword ptr [esi + 0x18], 0
            //   ff4e1c               | dec                 dword ptr [esi + 0x1c]
            //   7504                 | jne                 6
            //   83661800             | and                 dword ptr [esi + 0x18], 0
            //   c3                   | ret                 
            //   8b461c               | mov                 eax, dword ptr [esi + 0x1c]

        $sequence_7 = { 8b0c81 8bc6 e8???????? 8b45dc 0fb744433a 0fb60c07 51 }
            // n = 7, score = 100
            //   8b0c81               | mov                 ecx, dword ptr [ecx + eax*4]
            //   8bc6                 | mov                 eax, esi
            //   e8????????           |                     
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]
            //   0fb744433a           | movzx               eax, word ptr [ebx + eax*2 + 0x3a]
            //   0fb60c07             | movzx               ecx, byte ptr [edi + eax]
            //   51                   | push                ecx

        $sequence_8 = { 57 6a01 8d4dd0 e8???????? e8???????? c3 6a6c }
            // n = 7, score = 100
            //   57                   | push                edi
            //   6a01                 | push                1
            //   8d4dd0               | lea                 ecx, [ebp - 0x30]
            //   e8????????           |                     
            //   e8????????           |                     
            //   c3                   | ret                 
            //   6a6c                 | push                0x6c

        $sequence_9 = { ff5220 8b4d08 0fb7c0 50 6a01 e8???????? 8d4d0c }
            // n = 7, score = 100
            //   ff5220               | call                dword ptr [edx + 0x20]
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   0fb7c0               | movzx               eax, ax
            //   50                   | push                eax
            //   6a01                 | push                1
            //   e8????????           |                     
            //   8d4d0c               | lea                 ecx, [ebp + 0xc]

    condition:
        7 of them and filesize < 892928
}