rule win_newsreels_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.newsreels."
        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.newsreels"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 50 c6442414ff c644241502 c6442416b7 c6442417bc }
            // n = 5, score = 100
            //   50                   | push                eax
            //   c6442414ff           | mov                 byte ptr [esp + 0x14], 0xff
            //   c644241502           | mov                 byte ptr [esp + 0x15], 2
            //   c6442416b7           | mov                 byte ptr [esp + 0x16], 0xb7
            //   c6442417bc           | mov                 byte ptr [esp + 0x17], 0xbc

        $sequence_1 = { 895c2418 8bde 2bd9 83c304 895c241c eb04 8b542424 }
            // n = 7, score = 100
            //   895c2418             | mov                 dword ptr [esp + 0x18], ebx
            //   8bde                 | mov                 ebx, esi
            //   2bd9                 | sub                 ebx, ecx
            //   83c304               | add                 ebx, 4
            //   895c241c             | mov                 dword ptr [esp + 0x1c], ebx
            //   eb04                 | jmp                 6
            //   8b542424             | mov                 edx, dword ptr [esp + 0x24]

        $sequence_2 = { 8b54241c 52 ffd6 8b442418 50 ffd6 }
            // n = 6, score = 100
            //   8b54241c             | mov                 edx, dword ptr [esp + 0x1c]
            //   52                   | push                edx
            //   ffd6                 | call                esi
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   50                   | push                eax
            //   ffd6                 | call                esi

        $sequence_3 = { 68???????? 50 ff15???????? 8bd8 85db 750e 5e }
            // n = 7, score = 100
            //   68????????           |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax
            //   85db                 | test                ebx, ebx
            //   750e                 | jne                 0x10
            //   5e                   | pop                 esi

        $sequence_4 = { 52 68???????? e8???????? 8a542b01 }
            // n = 4, score = 100
            //   52                   | push                edx
            //   68????????           |                     
            //   e8????????           |                     
            //   8a542b01             | mov                 dl, byte ptr [ebx + ebp + 1]

        $sequence_5 = { 8b16 8d442408 52 50 }
            // n = 4, score = 100
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   8d442408             | lea                 eax, [esp + 8]
            //   52                   | push                edx
            //   50                   | push                eax

        $sequence_6 = { 52 68???????? e8???????? 8a4c2b01 2d???????? c1f802 0ac8 }
            // n = 7, score = 100
            //   52                   | push                edx
            //   68????????           |                     
            //   e8????????           |                     
            //   8a4c2b01             | mov                 cl, byte ptr [ebx + ebp + 1]
            //   2d????????           |                     
            //   c1f802               | sar                 eax, 2
            //   0ac8                 | or                  cl, al

        $sequence_7 = { 0bd0 895614 8b561c 8d040a 83f808 }
            // n = 5, score = 100
            //   0bd0                 | or                  edx, eax
            //   895614               | mov                 dword ptr [esi + 0x14], edx
            //   8b561c               | mov                 edx, dword ptr [esi + 0x1c]
            //   8d040a               | lea                 eax, [edx + ecx]
            //   83f808               | cmp                 eax, 8

        $sequence_8 = { 0fbe543e01 52 51 e8???????? 8a142b 2d???????? }
            // n = 6, score = 100
            //   0fbe543e01           | movsx               edx, byte ptr [esi + edi + 1]
            //   52                   | push                edx
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8a142b               | mov                 dl, byte ptr [ebx + ebp]
            //   2d????????           |                     

        $sequence_9 = { 5b 81c410050000 c3 8d4c240c 8d942418010000 }
            // n = 5, score = 100
            //   5b                   | pop                 ebx
            //   81c410050000         | add                 esp, 0x510
            //   c3                   | ret                 
            //   8d4c240c             | lea                 ecx, [esp + 0xc]
            //   8d942418010000       | lea                 edx, [esp + 0x118]

    condition:
        7 of them and filesize < 65536
}