rule win_bluehaze_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.bluehaze."
        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.bluehaze"
        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 = { 8b7508 6858020000 56 c745fc00000000 ffd2 8bc6 5e }
            // n = 7, score = 100
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   6858020000           | push                0x258
            //   56                   | push                esi
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   ffd2                 | call                edx
            //   8bc6                 | mov                 eax, esi
            //   5e                   | pop                 esi

        $sequence_1 = { 83c404 8975ec 85f6 7457 8b4d0c 8b4508 894e04 }
            // n = 7, score = 100
            //   83c404               | add                 esp, 4
            //   8975ec               | mov                 dword ptr [ebp - 0x14], esi
            //   85f6                 | test                esi, esi
            //   7457                 | je                  0x59
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   894e04               | mov                 dword ptr [esi + 4], ecx

        $sequence_2 = { 5e 5b 5d c20400 8b4e08 2bcf }
            // n = 6, score = 100
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   5d                   | pop                 ebp
            //   c20400               | ret                 4
            //   8b4e08               | mov                 ecx, dword ptr [esi + 8]
            //   2bcf                 | sub                 ecx, edi

        $sequence_3 = { 8945c8 8b40fc 03df 895dcc 3bc6 7d40 33d2 }
            // n = 7, score = 100
            //   8945c8               | mov                 dword ptr [ebp - 0x38], eax
            //   8b40fc               | mov                 eax, dword ptr [eax - 4]
            //   03df                 | add                 ebx, edi
            //   895dcc               | mov                 dword ptr [ebp - 0x34], ebx
            //   3bc6                 | cmp                 eax, esi
            //   7d40                 | jge                 0x42
            //   33d2                 | xor                 edx, edx

        $sequence_4 = { c745fc00000000 e8???????? 57 50 8d4e1c 51 c645fc01 }
            // n = 7, score = 100
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   e8????????           |                     
            //   57                   | push                edi
            //   50                   | push                eax
            //   8d4e1c               | lea                 ecx, [esi + 0x1c]
            //   51                   | push                ecx
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1

        $sequence_5 = { c745e80f000000 897de4 c645d400 8b16 8b4210 8bce c645fc04 }
            // n = 7, score = 100
            //   c745e80f000000       | mov                 dword ptr [ebp - 0x18], 0xf
            //   897de4               | mov                 dword ptr [ebp - 0x1c], edi
            //   c645d400             | mov                 byte ptr [ebp - 0x2c], 0
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   8b4210               | mov                 eax, dword ptr [edx + 0x10]
            //   8bce                 | mov                 ecx, esi
            //   c645fc04             | mov                 byte ptr [ebp - 4], 4

        $sequence_6 = { 5b 8be5 5d c20c00 8d4d08 51 8d4de4 }
            // n = 7, score = 100
            //   5b                   | pop                 ebx
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20c00               | ret                 0xc
            //   8d4d08               | lea                 ecx, [ebp + 8]
            //   51                   | push                ecx
            //   8d4de4               | lea                 ecx, [ebp - 0x1c]

        $sequence_7 = { 83f803 756a 837de401 7252 837de810 8b45d4 }
            // n = 6, score = 100
            //   83f803               | cmp                 eax, 3
            //   756a                 | jne                 0x6c
            //   837de401             | cmp                 dword ptr [ebp - 0x1c], 1
            //   7252                 | jb                  0x54
            //   837de810             | cmp                 dword ptr [ebp - 0x18], 0x10
            //   8b45d4               | mov                 eax, dword ptr [ebp - 0x2c]

        $sequence_8 = { ff15???????? 83c40c eb0a 8b0e 898d9cfeffff 891e 8b5610 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   83c40c               | add                 esp, 0xc
            //   eb0a                 | jmp                 0xc
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   898d9cfeffff         | mov                 dword ptr [ebp - 0x164], ecx
            //   891e                 | mov                 dword ptr [esi], ebx
            //   8b5610               | mov                 edx, dword ptr [esi + 0x10]

        $sequence_9 = { 33c0 8bf8 8d8dd0faffff e9???????? 68???????? 8d8db0fbffff e8???????? }
            // n = 7, score = 100
            //   33c0                 | xor                 eax, eax
            //   8bf8                 | mov                 edi, eax
            //   8d8dd0faffff         | lea                 ecx, [ebp - 0x530]
            //   e9????????           |                     
            //   68????????           |                     
            //   8d8db0fbffff         | lea                 ecx, [ebp - 0x450]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 424960
}