rule win_chinoxy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.chinoxy."
        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.chinoxy"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 83c8ff 5b c3 83c00f 50 ff15???????? 8944241c }
            // n = 7, score = 100
            //   83c8ff               | or                  eax, 0xffffffff
            //   5b                   | pop                 ebx
            //   c3                   | ret                 
            //   83c00f               | add                 eax, 0xf
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8944241c             | mov                 dword ptr [esp + 0x1c], eax

        $sequence_1 = { eb2b 8b44241c 85c0 745b ff15???????? 3d33270000 754e }
            // n = 7, score = 100
            //   eb2b                 | jmp                 0x2d
            //   8b44241c             | mov                 eax, dword ptr [esp + 0x1c]
            //   85c0                 | test                eax, eax
            //   745b                 | je                  0x5d
            //   ff15????????         |                     
            //   3d33270000           | cmp                 eax, 0x2733
            //   754e                 | jne                 0x50

        $sequence_2 = { 8bca 8bc2 c1e119 c1e807 0bc8 33fa }
            // n = 6, score = 100
            //   8bca                 | mov                 ecx, edx
            //   8bc2                 | mov                 eax, edx
            //   c1e119               | shl                 ecx, 0x19
            //   c1e807               | shr                 eax, 7
            //   0bc8                 | or                  ecx, eax
            //   33fa                 | xor                 edi, edx

        $sequence_3 = { 89430c 8b4808 894b10 7459 8b4b0c 6a00 }
            // n = 6, score = 100
            //   89430c               | mov                 dword ptr [ebx + 0xc], eax
            //   8b4808               | mov                 ecx, dword ptr [eax + 8]
            //   894b10               | mov                 dword ptr [ebx + 0x10], ecx
            //   7459                 | je                  0x5b
            //   8b4b0c               | mov                 ecx, dword ptr [ebx + 0xc]
            //   6a00                 | push                0

        $sequence_4 = { 5b c20400 8b4708 8b16 50 8bce ff526c }
            // n = 7, score = 100
            //   5b                   | pop                 ebx
            //   c20400               | ret                 4
            //   8b4708               | mov                 eax, dword ptr [edi + 8]
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   50                   | push                eax
            //   8bce                 | mov                 ecx, esi
            //   ff526c               | call                dword ptr [edx + 0x6c]

        $sequence_5 = { 85c0 0f8fae000000 53 8d4e04 c7860481010001000000 e8???????? 8b8608810100 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   0f8fae000000         | jg                  0xb4
            //   53                   | push                ebx
            //   8d4e04               | lea                 ecx, dword ptr [esi + 4]
            //   c7860481010001000000     | mov    dword ptr [esi + 0x18104], 1
            //   e8????????           |                     
            //   8b8608810100         | mov                 eax, dword ptr [esi + 0x18108]

        $sequence_6 = { 8b4c2434 2bf7 8930 8bc2 5f 2bc5 5e }
            // n = 7, score = 100
            //   8b4c2434             | mov                 ecx, dword ptr [esp + 0x34]
            //   2bf7                 | sub                 esi, edi
            //   8930                 | mov                 dword ptr [eax], esi
            //   8bc2                 | mov                 eax, edx
            //   5f                   | pop                 edi
            //   2bc5                 | sub                 eax, ebp
            //   5e                   | pop                 esi

        $sequence_7 = { 89442420 e8???????? 8b442420 83c404 85c0 0f8432010000 8b442418 }
            // n = 7, score = 100
            //   89442420             | mov                 dword ptr [esp + 0x20], eax
            //   e8????????           |                     
            //   8b442420             | mov                 eax, dword ptr [esp + 0x20]
            //   83c404               | add                 esp, 4
            //   85c0                 | test                eax, eax
            //   0f8432010000         | je                  0x138
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]

        $sequence_8 = { 81c6d4000000 3bc6 0f84bd000000 397604 0f84b4000000 8b6c2414 83fdff }
            // n = 7, score = 100
            //   81c6d4000000         | add                 esi, 0xd4
            //   3bc6                 | cmp                 eax, esi
            //   0f84bd000000         | je                  0xc3
            //   397604               | cmp                 dword ptr [esi + 4], esi
            //   0f84b4000000         | je                  0xba
            //   8b6c2414             | mov                 ebp, dword ptr [esp + 0x14]
            //   83fdff               | cmp                 ebp, -1

        $sequence_9 = { c744241800000000 e8???????? 85c0 7419 8b8eb8200000 8d86b0200000 3bc8 }
            // n = 7, score = 100
            //   c744241800000000     | mov                 dword ptr [esp + 0x18], 0
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7419                 | je                  0x1b
            //   8b8eb8200000         | mov                 ecx, dword ptr [esi + 0x20b8]
            //   8d86b0200000         | lea                 eax, dword ptr [esi + 0x20b0]
            //   3bc8                 | cmp                 ecx, eax

    condition:
        7 of them and filesize < 1138688
}