rule win_pulsartea_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.pulsartea."
        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.pulsartea"
        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 = { 8bd1 85d2 0f8463010000 410fb606 4533c0 418801 49ffc6 }
            // n = 7, score = 100
            //   8bd1                 | lock xadd           dword ptr [ebx], eax
            //   85d2                 | cmp                 eax, 1
            //   0f8463010000         | jne                 0xda4
            //   410fb606             | dec                 eax
            //   4533c0               | lea                 eax, [0x16b1e]
            //   418801               | dec                 eax
            //   49ffc6               | mov                 ecx, dword ptr [esp + 0x30]

        $sequence_1 = { e8???????? 85c0 488d542478 41bfffffffff 488bcb 410f45ff }
            // n = 6, score = 100
            //   e8????????           |                     
            //   85c0                 | cmove               ebx, edi
            //   488d542478           | dec                 eax
            //   41bfffffffff         | mov                 ecx, dword ptr [edi]
            //   488bcb               | mov                 eax, dword ptr [edi + 0x44]
            //   410f45ff             | movzx               ecx, byte ptr [edi + 0x34]

        $sequence_2 = { e8???????? c74708ffffffff 807c245000 7412 33c0 488b9c2498000000 4883c460 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   c74708ffffffff       | dec                 eax
            //   807c245000           | lea                 ecx, [esp + 0x260]
            //   7412                 | mov                 edx, 0x104
            //   33c0                 | inc                 ecx
            //   488b9c2498000000     | mov                 ecx, 1
            //   4883c460             | dec                 esp

        $sequence_3 = { 4d8bcc 89442418 458bd4 44896520 443bf1 0f8f60020000 }
            // n = 6, score = 100
            //   4d8bcc               | mov                 edi, dword ptr [ecx + 0x30]
            //   89442418             | mov                 ebx, dword ptr [ecx + 0x2c]
            //   458bd4               | dec                 esp
            //   44896520             | cmp                 ecx, edx
            //   443bf1               | jae                 0x406
            //   0f8f60020000         | inc                 ecx

        $sequence_4 = { 41b902000000 4533c0 33d2 ff15???????? 803b00 742f 807b0100 }
            // n = 7, score = 100
            //   41b902000000         | inc                 ebp
            //   4533c0               | mov                 dword ptr [ebp], esi
            //   33d2                 | inc                 ebp
            //   ff15????????         |                     
            //   803b00               | mov                 edx, dword ptr [ebp + 8]
            //   742f                 | inc                 ecx
            //   807b0100             | cmp                 ebx, edx

        $sequence_5 = { 4883f81f 772d e8???????? 488bc6 488b4c2470 4833cc }
            // n = 6, score = 100
            //   4883f81f             | inc                 esp
            //   772d                 | mov                 dword ptr [edi + 0x30], edi
            //   e8????????           |                     
            //   488bc6               | mov                 eax, esi
            //   488b4c2470           | mov                 dword ptr [edi + 0x2c], ebx
            //   4833cc               | inc                 ecx

        $sequence_6 = { 443b05???????? 7357 498bc8 4c8d15016a0100 83e13f 498bc0 48c1f806 }
            // n = 7, score = 100
            //   443b05????????       |                     
            //   7357                 | mov                 ebp, dword ptr [esp + 0x58]
            //   498bc8               | ja                  0x1141
            //   4c8d15016a0100       | dec                 ecx
            //   83e13f               | mov                 ecx, esi
            //   498bc0               | dec                 eax
            //   48c1f806             | mov                 ecx, dword ptr [ebp - 0x78]

        $sequence_7 = { 48897c2420 488bd7 488d4d80 e8???????? 90 488b542448 4883fa10 }
            // n = 7, score = 100
            //   48897c2420           | movzx               edx, byte ptr [ebx]
            //   488bd7               | mov                 ecx, eax
            //   488d4d80             | inc                 ecx
            //   e8????????           |                     
            //   90                   | test                bl, 0x10
            //   488b542448           | jne                 0x2cc
            //   4883fa10             | nop                 dword ptr [eax]

        $sequence_8 = { 41894118 0fb60a 83e10f 4a0fbe8411c8650200 428a8c11d8650200 482bd0 8b42fc }
            // n = 7, score = 100
            //   41894118             | lea                 ecx, [eax + 0x17]
            //   0fb60a               | movups              xmmword ptr [ebp - 0x20], xmm0
            //   83e10f               | movups              xmmword ptr [ebp - 0x10], xmm0
            //   4a0fbe8411c8650200     | movups    xmmword ptr [ebp - 0x39], xmm0
            //   428a8c11d8650200     | mov                 esi, 0xf
            //   482bd0               | jmp                 0x91
            //   8b42fc               | dec                 ecx

        $sequence_9 = { 894dd0 85c0 753f 488d5530 498bcf e8???????? 85c0 }
            // n = 7, score = 100
            //   894dd0               | dec                 eax
            //   85c0                 | mov                 dword ptr [ecx], eax
            //   753f                 | dec                 eax
            //   488d5530             | mov                 ecx, dword ptr [ebx + 0x60]
            //   498bcf               | dec                 eax
            //   e8????????           |                     
            //   85c0                 | test                ecx, ecx

    condition:
        7 of them and filesize < 520192
}