rule win_icexloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.icexloader."
        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.icexloader"
        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 = { 8b8550ffffff 29d0 8945b0 8b85ecfeffff 8b55b0 89542404 890424 }
            // n = 7, score = 200
            //   8b8550ffffff         | mov                 eax, dword ptr [ebp - 0xb0]
            //   29d0                 | sub                 eax, edx
            //   8945b0               | mov                 dword ptr [ebp - 0x50], eax
            //   8b85ecfeffff         | mov                 eax, dword ptr [ebp - 0x114]
            //   8b55b0               | mov                 edx, dword ptr [ebp - 0x50]
            //   89542404             | mov                 dword ptr [esp + 4], edx
            //   890424               | mov                 dword ptr [esp], eax

        $sequence_1 = { dec9 dd04c540574200 0f896afcffff def9 e9???????? 83bde0fdffff00 784e }
            // n = 7, score = 200
            //   dec9                 | fmulp               st(1)
            //   dd04c540574200       | fld                 qword ptr [eax*8 + 0x425740]
            //   0f896afcffff         | jns                 0xfffffc70
            //   def9                 | fdivp               st(1)
            //   e9????????           |                     
            //   83bde0fdffff00       | cmp                 dword ptr [ebp - 0x220], 0
            //   784e                 | js                  0x50

        $sequence_2 = { ba08000000 01f8 8945d0 8d45d8 e8???????? b9???????? e8???????? }
            // n = 7, score = 200
            //   ba08000000           | mov                 edx, 8
            //   01f8                 | add                 eax, edi
            //   8945d0               | mov                 dword ptr [ebp - 0x30], eax
            //   8d45d8               | lea                 eax, [ebp - 0x28]
            //   e8????????           |                     
            //   b9????????           |                     
            //   e8????????           |                     

        $sequence_3 = { 8955c0 e8???????? 8b55c0 89c3 e8???????? ba???????? }
            // n = 6, score = 200
            //   8955c0               | mov                 dword ptr [ebp - 0x40], edx
            //   e8????????           |                     
            //   8b55c0               | mov                 edx, dword ptr [ebp - 0x40]
            //   89c3                 | mov                 ebx, eax
            //   e8????????           |                     
            //   ba????????           |                     

        $sequence_4 = { 85ff 7407 8b07 8945d8 eb07 c745d800000000 c745e000000000 }
            // n = 7, score = 200
            //   85ff                 | test                edi, edi
            //   7407                 | je                  9
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   8945d8               | mov                 dword ptr [ebp - 0x28], eax
            //   eb07                 | jmp                 9
            //   c745d800000000       | mov                 dword ptr [ebp - 0x28], 0
            //   c745e000000000       | mov                 dword ptr [ebp - 0x20], 0

        $sequence_5 = { 83bd30ffffff00 7407 ba10000000 eb05 ba20000000 8b8510ffffff 09d0 }
            // n = 7, score = 200
            //   83bd30ffffff00       | cmp                 dword ptr [ebp - 0xd0], 0
            //   7407                 | je                  9
            //   ba10000000           | mov                 edx, 0x10
            //   eb05                 | jmp                 7
            //   ba20000000           | mov                 edx, 0x20
            //   8b8510ffffff         | mov                 eax, dword ptr [ebp - 0xf0]
            //   09d0                 | or                  eax, edx

        $sequence_6 = { 891c24 eb0c 8d45e0 891c24 89f2 89442404 8d4dd8 }
            // n = 7, score = 200
            //   891c24               | mov                 dword ptr [esp], ebx
            //   eb0c                 | jmp                 0xe
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   891c24               | mov                 dword ptr [esp], ebx
            //   89f2                 | mov                 edx, esi
            //   89442404             | mov                 dword ptr [esp + 4], eax
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]

        $sequence_7 = { 8d8518fdffff c78504fdfffffdffffff e8???????? ba20000000 8d8538fdffff e8???????? 83bdf4fcffff00 }
            // n = 7, score = 200
            //   8d8518fdffff         | lea                 eax, [ebp - 0x2e8]
            //   c78504fdfffffdffffff     | mov    dword ptr [ebp - 0x2fc], 0xfffffffd
            //   e8????????           |                     
            //   ba20000000           | mov                 edx, 0x20
            //   8d8538fdffff         | lea                 eax, [ebp - 0x2c8]
            //   e8????????           |                     
            //   83bdf4fcffff00       | cmp                 dword ptr [ebp - 0x30c], 0

        $sequence_8 = { 8d8520f0ffff e8???????? 84db 7560 8b85e4e6ffff ba05000000 e8???????? }
            // n = 7, score = 200
            //   8d8520f0ffff         | lea                 eax, [ebp - 0xfe0]
            //   e8????????           |                     
            //   84db                 | test                bl, bl
            //   7560                 | jne                 0x62
            //   8b85e4e6ffff         | mov                 eax, dword ptr [ebp - 0x191c]
            //   ba05000000           | mov                 edx, 5
            //   e8????????           |                     

        $sequence_9 = { 5f 5d c20400 55 d9ee 89e5 }
            // n = 6, score = 200
            //   5f                   | pop                 edi
            //   5d                   | pop                 ebp
            //   c20400               | ret                 4
            //   55                   | push                ebp
            //   d9ee                 | fldz                
            //   89e5                 | mov                 ebp, esp

    condition:
        7 of them and filesize < 656384
}