rule win_hemigate_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.hemigate."
        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.hemigate"
        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 = { 8945fc 56 8bf1 57 8bfa 0fb64610 8b5610 }
            // n = 7, score = 200
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   56                   | push                esi
            //   8bf1                 | mov                 esi, ecx
            //   57                   | push                edi
            //   8bfa                 | mov                 edi, edx
            //   0fb64610             | movzx               eax, byte ptr [esi + 0x10]
            //   8b5610               | mov                 edx, dword ptr [esi + 0x10]

        $sequence_1 = { 6a00 e8???????? 83c404 899594efffff 50 ff15???????? 894620 }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   899594efffff         | mov                 dword ptr [ebp - 0x106c], edx
            //   50                   | push                eax
            //   ff15????????         |                     
            //   894620               | mov                 dword ptr [esi + 0x20], eax

        $sequence_2 = { 8d8588feffff 50 e8???????? 83c408 8bcf 85c0 0f44f9 }
            // n = 7, score = 200
            //   8d8588feffff         | lea                 eax, [ebp - 0x178]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8bcf                 | mov                 ecx, edi
            //   85c0                 | test                eax, eax
            //   0f44f9               | cmove               edi, ecx

        $sequence_3 = { b8d8100000 e8???????? a1???????? 33c4 898424d4100000 56 be???????? }
            // n = 7, score = 200
            //   b8d8100000           | mov                 eax, 0x10d8
            //   e8????????           |                     
            //   a1????????           |                     
            //   33c4                 | xor                 eax, esp
            //   898424d4100000       | mov                 dword ptr [esp + 0x10d4], eax
            //   56                   | push                esi
            //   be????????           |                     

        $sequence_4 = { 33c8 895ddc 8b45ec c1c802 33c8 8b45ec }
            // n = 6, score = 200
            //   33c8                 | xor                 ecx, eax
            //   895ddc               | mov                 dword ptr [ebp - 0x24], ebx
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   c1c802               | ror                 eax, 2
            //   33c8                 | xor                 ecx, eax
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]

        $sequence_5 = { ff7310 ff7318 ff731c ff7320 ff730c ff7304 ff7308 }
            // n = 7, score = 200
            //   ff7310               | push                dword ptr [ebx + 0x10]
            //   ff7318               | push                dword ptr [ebx + 0x18]
            //   ff731c               | push                dword ptr [ebx + 0x1c]
            //   ff7320               | push                dword ptr [ebx + 0x20]
            //   ff730c               | push                dword ptr [ebx + 0xc]
            //   ff7304               | push                dword ptr [ebx + 4]
            //   ff7308               | push                dword ptr [ebx + 8]

        $sequence_6 = { 6a01 ff10 ffb5d4fdffff e8???????? ffb5d8fdffff e8???????? 83c408 }
            // n = 7, score = 200
            //   6a01                 | push                1
            //   ff10                 | call                dword ptr [eax]
            //   ffb5d4fdffff         | push                dword ptr [ebp - 0x22c]
            //   e8????????           |                     
            //   ffb5d8fdffff         | push                dword ptr [ebp - 0x228]
            //   e8????????           |                     
            //   83c408               | add                 esp, 8

        $sequence_7 = { c1c919 33c8 8b7de0 8bc3 8b5dfc c1c806 33c8 }
            // n = 7, score = 200
            //   c1c919               | ror                 ecx, 0x19
            //   33c8                 | xor                 ecx, eax
            //   8b7de0               | mov                 edi, dword ptr [ebp - 0x20]
            //   8bc3                 | mov                 eax, ebx
            //   8b5dfc               | mov                 ebx, dword ptr [ebp - 4]
            //   c1c806               | ror                 eax, 6
            //   33c8                 | xor                 ecx, eax

        $sequence_8 = { 83fa6f 750c c681????????2f e9???????? 83fa6e 750c c681????????2e }
            // n = 7, score = 200
            //   83fa6f               | cmp                 edx, 0x6f
            //   750c                 | jne                 0xe
            //   c681????????2f       |                     
            //   e9????????           |                     
            //   83fa6e               | cmp                 edx, 0x6e
            //   750c                 | jne                 0xe
            //   c681????????2e       |                     

        $sequence_9 = { e8???????? 8bf0 85f6 0f8529060000 8bd7 8d4d88 e8???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   85f6                 | test                esi, esi
            //   0f8529060000         | jne                 0x62f
            //   8bd7                 | mov                 edx, edi
            //   8d4d88               | lea                 ecx, [ebp - 0x78]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 991232
}