rule win_newsreels_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 0fbe543702 52 68???????? e8???????? 8a4c2b01 2d???????? c1f802 }
            // n = 7, score = 100
            //   0fbe543702           | movsx               edx, byte ptr [edi + esi + 2]
            //   52                   | push                edx
            //   68????????           |                     
            //   e8????????           |                     
            //   8a4c2b01             | mov                 cl, byte ptr [ebx + ebp + 1]
            //   2d????????           |                     
            //   c1f802               | sar                 eax, 2

        $sequence_1 = { 8b1d???????? 6884030000 68c2010000 e8???????? 8bf0 83c408 33c0 }
            // n = 7, score = 100
            //   8b1d????????         |                     
            //   6884030000           | push                0x384
            //   68c2010000           | push                0x1c2
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c408               | add                 esp, 8
            //   33c0                 | xor                 eax, eax

        $sequence_2 = { 5b 81c40c040000 c3 8bc5 57 }
            // n = 5, score = 100
            //   5b                   | pop                 ebx
            //   81c40c040000         | add                 esp, 0x40c
            //   c3                   | ret                 
            //   8bc5                 | mov                 eax, ebp
            //   57                   | push                edi

        $sequence_3 = { e8???????? 6a01 6804010000 68???????? e8???????? 68???????? 68???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   6a01                 | push                1
            //   6804010000           | push                0x104
            //   68????????           |                     
            //   e8????????           |                     
            //   68????????           |                     
            //   68????????           |                     

        $sequence_4 = { 8dbc2488000000 83c9ff 33c0 6a4d f2ae f7d1 }
            // n = 6, score = 100
            //   8dbc2488000000       | lea                 edi, [esp + 0x88]
            //   83c9ff               | or                  ecx, 0xffffffff
            //   33c0                 | xor                 eax, eax
            //   6a4d                 | push                0x4d
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   f7d1                 | not                 ecx

        $sequence_5 = { 83c408 85db 750a 5e 5d }
            // n = 5, score = 100
            //   83c408               | add                 esp, 8
            //   85db                 | test                ebx, ebx
            //   750a                 | jne                 0xc
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp

        $sequence_6 = { 8808 8b15???????? 8bcb 8bc1 8d7a01 c1e902 }
            // n = 6, score = 100
            //   8808                 | mov                 byte ptr [eax], cl
            //   8b15????????         |                     
            //   8bcb                 | mov                 ecx, ebx
            //   8bc1                 | mov                 eax, ecx
            //   8d7a01               | lea                 edi, [edx + 1]
            //   c1e902               | shr                 ecx, 2

        $sequence_7 = { 8d442424 53 50 68???????? 53 }
            // n = 5, score = 100
            //   8d442424             | lea                 eax, [esp + 0x24]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   68????????           |                     
            //   53                   | push                ebx

        $sequence_8 = { 80e301 881c86 8bda c1fb02 80e301 }
            // n = 5, score = 100
            //   80e301               | and                 bl, 1
            //   881c86               | mov                 byte ptr [esi + eax*4], bl
            //   8bda                 | mov                 ebx, edx
            //   c1fb02               | sar                 ebx, 2
            //   80e301               | and                 bl, 1

        $sequence_9 = { 6a00 68???????? 68???????? 56 ff15???????? 8be8 85ed }
            // n = 7, score = 100
            //   6a00                 | push                0
            //   68????????           |                     
            //   68????????           |                     
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8be8                 | mov                 ebp, eax
            //   85ed                 | test                ebp, ebp

    condition:
        7 of them and filesize < 65536
}