rule win_typehash_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.typehash."
        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.typehash"
        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 = { 8841ff eb0a 49 51 e8???????? 83c404 8b8c24c0000000 }
            // n = 7, score = 100
            //   8841ff               | mov                 byte ptr [ecx - 1], al
            //   eb0a                 | jmp                 0xc
            //   49                   | dec                 ecx
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8b8c24c0000000       | mov                 ecx, dword ptr [esp + 0xc0]

        $sequence_1 = { f6c303 7509 8b0c85b02b4100 eb07 8b0c85e42b4100 034d20 837d0801 }
            // n = 7, score = 100
            //   f6c303               | test                bl, 3
            //   7509                 | jne                 0xb
            //   8b0c85b02b4100       | mov                 ecx, dword ptr [eax*4 + 0x412bb0]
            //   eb07                 | jmp                 9
            //   8b0c85e42b4100       | mov                 ecx, dword ptr [eax*4 + 0x412be4]
            //   034d20               | add                 ecx, dword ptr [ebp + 0x20]
            //   837d0801             | cmp                 dword ptr [ebp + 8], 1

        $sequence_2 = { 8818 8a9c0a93e54000 88990f354100 40 83f903 }
            // n = 5, score = 100
            //   8818                 | mov                 byte ptr [eax], bl
            //   8a9c0a93e54000       | mov                 bl, byte ptr [edx + ecx + 0x40e593]
            //   88990f354100         | mov                 byte ptr [ecx + 0x41350f], bl
            //   40                   | inc                 eax
            //   83f903               | cmp                 ecx, 3

        $sequence_3 = { 7524 8b5750 6a04 6800300000 52 50 ffd6 }
            // n = 7, score = 100
            //   7524                 | jne                 0x26
            //   8b5750               | mov                 edx, dword ptr [edi + 0x50]
            //   6a04                 | push                4
            //   6800300000           | push                0x3000
            //   52                   | push                edx
            //   50                   | push                eax
            //   ffd6                 | call                esi

        $sequence_4 = { 8a442403 53 55 56 33ed }
            // n = 5, score = 100
            //   8a442403             | mov                 al, byte ptr [esp + 3]
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   56                   | push                esi
            //   33ed                 | xor                 ebp, ebp

        $sequence_5 = { 7514 c1e902 83e203 83f908 7229 f3a5 ff2495f8334000 }
            // n = 7, score = 100
            //   7514                 | jne                 0x16
            //   c1e902               | shr                 ecx, 2
            //   83e203               | and                 edx, 3
            //   83f908               | cmp                 ecx, 8
            //   7229                 | jb                  0x2b
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   ff2495f8334000       | jmp                 dword ptr [edx*4 + 0x4033f8]

        $sequence_6 = { ff15???????? bf???????? 83c9ff 33c0 68???????? f2ae }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   bf????????           |                     
            //   83c9ff               | or                  ecx, 0xffffffff
            //   33c0                 | xor                 eax, eax
            //   68????????           |                     
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]

        $sequence_7 = { 66f7460c0c01 7552 833c852835410000 53 57 8d3c8528354100 }
            // n = 6, score = 100
            //   66f7460c0c01         | test                word ptr [esi + 0xc], 0x10c
            //   7552                 | jne                 0x54
            //   833c852835410000     | cmp                 dword ptr [eax*4 + 0x413528], 0
            //   53                   | push                ebx
            //   57                   | push                edi
            //   8d3c8528354100       | lea                 edi, [eax*4 + 0x413528]

        $sequence_8 = { 5f 89b0f83a4100 5e 5b }
            // n = 4, score = 100
            //   5f                   | pop                 edi
            //   89b0f83a4100         | mov                 dword ptr [eax + 0x413af8], esi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

        $sequence_9 = { 8d8424a80a0000 8d8c2404010000 89442474 3bfb }
            // n = 4, score = 100
            //   8d8424a80a0000       | lea                 eax, [esp + 0xaa8]
            //   8d8c2404010000       | lea                 ecx, [esp + 0x104]
            //   89442474             | mov                 dword ptr [esp + 0x74], eax
            //   3bfb                 | cmp                 edi, ebx

    condition:
        7 of them and filesize < 180224
}

rule win_typehash_w0 {
    meta:
        author = "Jeff White (karttoon@gmail.com) @noottrak"
        date = "15APR2020"
        hash = "d81ba465fe59e7d600f7ab0e8161246a5badd8ae2c3084f76442fb49f6585e95"
        description = "Detects an observed Negastealer campaign payload"
        source = "https://github.com/karttoon/iocs/blob/899dac6045a73045baa8966a16b7402d625ee26b/Negasteal/troj_win_negasteal.yar"

        malpedia_rule_date = "20200817"
        malpedia_hash = ""
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.typehash"
        malpedia_version = "20201007"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    strings:
	    $s1 = "Mozilla/5.0 (Windows NT 5.2) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.122 Safari/534.30"
	    $s2 = "news.php"
	    $s3 = "http://%s/%s"
	    $s4 = "type=0"
	    $s5 = "time=%s"
    condition:
	    all of them
}