rule win_newposthings_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.newposthings."
        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.newposthings"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 68e4010210 56 8bc8 e8???????? 8b450c 89580c 8b07 }
            // n = 7, score = 100
            //   68e4010210           | push                0x100201e4
            //   56                   | push                esi
            //   8bc8                 | mov                 ecx, eax
            //   e8????????           |                     
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   89580c               | mov                 dword ptr [eax + 0xc], ebx
            //   8b07                 | mov                 eax, dword ptr [edi]

        $sequence_1 = { 03148538f34500 eb05 ba???????? f642247f 0f858f0a0000 83f9ff 7419 }
            // n = 7, score = 100
            //   03148538f34500       | add                 edx, dword ptr [eax*4 + 0x45f338]
            //   eb05                 | jmp                 7
            //   ba????????           |                     
            //   f642247f             | test                byte ptr [edx + 0x24], 0x7f
            //   0f858f0a0000         | jne                 0xa95
            //   83f9ff               | cmp                 ecx, -1
            //   7419                 | je                  0x1b

        $sequence_2 = { 56 ff15???????? c745fcffffffff 83bdb8feffff10 720e ffb5a4feffff e8???????? }
            // n = 7, score = 100
            //   56                   | push                esi
            //   ff15????????         |                     
            //   c745fcffffffff       | mov                 dword ptr [ebp - 4], 0xffffffff
            //   83bdb8feffff10       | cmp                 dword ptr [ebp - 0x148], 0x10
            //   720e                 | jb                  0x10
            //   ffb5a4feffff         | push                dword ptr [ebp - 0x15c]
            //   e8????????           |                     

        $sequence_3 = { 75f9 2bca 807c39ff0a 7512 8bcf 8d5101 8a01 }
            // n = 7, score = 100
            //   75f9                 | jne                 0xfffffffb
            //   2bca                 | sub                 ecx, edx
            //   807c39ff0a           | cmp                 byte ptr [ecx + edi - 1], 0xa
            //   7512                 | jne                 0x14
            //   8bcf                 | mov                 ecx, edi
            //   8d5101               | lea                 edx, [ecx + 1]
            //   8a01                 | mov                 al, byte ptr [ecx]

        $sequence_4 = { 8bc7 5f 5e 5d c3 6a0c 68d0cf0110 }
            // n = 7, score = 100
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   6a0c                 | push                0xc
            //   68d0cf0110           | push                0x1001cfd0

        $sequence_5 = { 0f84d2000000 8d4da4 e8???????? 8bf0 c745fc00000000 8b55d4 8d4dbc }
            // n = 7, score = 100
            //   0f84d2000000         | je                  0xd8
            //   8d4da4               | lea                 ecx, [ebp - 0x5c]
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   8b55d4               | mov                 edx, dword ptr [ebp - 0x2c]
            //   8d4dbc               | lea                 ecx, [ebp - 0x44]

        $sequence_6 = { 7419 8bd1 83e21f 8bc1 c1f805 c1e206 031485481d0210 }
            // n = 7, score = 100
            //   7419                 | je                  0x1b
            //   8bd1                 | mov                 edx, ecx
            //   83e21f               | and                 edx, 0x1f
            //   8bc1                 | mov                 eax, ecx
            //   c1f805               | sar                 eax, 5
            //   c1e206               | shl                 edx, 6
            //   031485481d0210       | add                 edx, dword ptr [eax*4 + 0x10021d48]

        $sequence_7 = { 8d853cfeffff 50 6a01 6a00 }
            // n = 4, score = 100
            //   8d853cfeffff         | lea                 eax, [ebp - 0x1c4]
            //   50                   | push                eax
            //   6a01                 | push                1
            //   6a00                 | push                0

        $sequence_8 = { 68c8200210 ff15???????? 6804010000 8d442470 }
            // n = 4, score = 100
            //   68c8200210           | push                0x100220c8
            //   ff15????????         |                     
            //   6804010000           | push                0x104
            //   8d442470             | lea                 eax, [esp + 0x70]

        $sequence_9 = { 682c820110 57 a3???????? ffd6 3305???????? 6848820110 57 }
            // n = 7, score = 100
            //   682c820110           | push                0x1001822c
            //   57                   | push                edi
            //   a3????????           |                     
            //   ffd6                 | call                esi
            //   3305????????         |                     
            //   6848820110           | push                0x10018248
            //   57                   | push                edi

    condition:
        7 of them and filesize < 827392
}