rule win_ice_cache_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.ice_cache."
        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.ice_cache"
        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 = { 4889842488000000 488d4c2428 e8???????? 48c744243800000000 48c74424400f000000 c644242800 41b868000000 }
            // n = 7, score = 100
            //   4889842488000000     | dec                 eax
            //   488d4c2428           | lea                 ecx, [ebp - 0x80]
            //   e8????????           |                     
            //   48c744243800000000     | nop    
            //   48c74424400f000000     | dec    esp
            //   c644242800           | lea                 eax, [edi + 1]
            //   41b868000000         | dec                 eax

        $sequence_1 = { 488d4c2448 e8???????? 488d4c2448 e8???????? 90 488d4c2468 e8???????? }
            // n = 7, score = 100
            //   488d4c2448           | dec                 eax
            //   e8????????           |                     
            //   488d4c2448           | lea                 ecx, [esp + 0x17c8]
            //   e8????????           |                     
            //   90                   | nop                 
            //   488d4c2468           | nop                 
            //   e8????????           |                     

        $sequence_2 = { e8???????? 4533f6 4c89742458 48c74424600f000000 4488742448 488d45a0 4983c8ff }
            // n = 7, score = 100
            //   e8????????           |                     
            //   4533f6               | mov                 byte ptr [ebp + 0x18], al
            //   4c89742458           | dec                 eax
            //   48c74424600f000000     | lea    eax, [ebp + 0xa0]
            //   4488742448           | dec                 eax
            //   488d45a0             | inc                 ebx
            //   4983c8ff             | cmp                 byte ptr [eax + ebx], 0

        $sequence_3 = { e8???????? 488b8424c0000000 48898424f8010000 488b4c2450 483bc8 0f848d010000 4883c140 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   488b8424c0000000     | mov                 dword ptr [ebp - 0x39], eax
            //   48898424f8010000     | dec                 eax
            //   488b4c2450           | mov                 dword ptr [ecx + 0x10], eax
            //   483bc8               | dec                 eax
            //   0f848d010000         | mov                 dword ptr [ecx + 0x18], 0xf
            //   4883c140             | mov                 byte ptr [ecx], al

        $sequence_4 = { ff15???????? 483305???????? 488d150c3f0200 488bcb 488905???????? ff15???????? }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   483305????????       |                     
            //   488d150c3f0200       | dec                 eax
            //   488bcb               | lea                 edx, [0x4471f]
            //   488905????????       |                     
            //   ff15????????         |                     

        $sequence_5 = { 84c0 0f840effffff 48634330 488d0c40 48634328 488d1488 488d050ef40100 }
            // n = 7, score = 100
            //   84c0                 | mov                 dword ptr [ebx + 0x10], edx
            //   0f840effffff         | dec                 eax
            //   48634330             | mov                 dword ptr [ebx + 0x18], 7
            //   488d0c40             | inc                 sp
            //   48634328             | mov                 dword ptr [ebx], edx
            //   488d1488             | inc                 esp
            //   488d050ef40100       | mov                 eax, ebx

        $sequence_6 = { 488bd3 4c8d050e0f0200 83e23f 488bcb 48c1f906 48c1e206 498b0cc8 }
            // n = 7, score = 100
            //   488bd3               | dec                 eax
            //   4c8d050e0f0200       | cmp                 dword ptr [edi + 0x18], 0x10
            //   83e23f               | jb                  0x1b7c
            //   488bcb               | dec                 eax
            //   48c1f906             | mov                 edx, dword ptr [edi]
            //   48c1e206             | jmp                 0x1b7f
            //   498b0cc8             | jbe                 0x1bcf

        $sequence_7 = { 664183c030 66458901 4c8bc2 4885d2 75d0 488d442452 4c895b10 }
            // n = 7, score = 100
            //   664183c030           | lea                 eax, [0x3222a]
            //   66458901             | xor                 al, al
            //   4c8bc2               | dec                 eax
            //   4885d2               | lea                 ecx, [0x3e584]
            //   75d0                 | test                eax, eax
            //   488d442452           | je                  0x935
            //   4c895b10             | jmp                 0x8b7

        $sequence_8 = { 488bd6 488d4d78 e8???????? 90 8b44246c ffc8 }
            // n = 6, score = 100
            //   488bd6               | dec                 eax
            //   488d4d78             | mov                 esi, eax
            //   e8????????           |                     
            //   90                   | dec                 eax
            //   8b44246c             | test                eax, eax
            //   ffc8                 | je                  0x4df

        $sequence_9 = { 488d05d0cb0300 488901 e8???????? 90 f6c301 740e }
            // n = 6, score = 100
            //   488d05d0cb0300       | mov                 ecx, 1
            //   488901               | nop                 
            //   e8????????           |                     
            //   90                   | dec                 eax
            //   f6c301               | cmp                 dword ptr [esp + 0x1378], 0
            //   740e                 | jne                 0x1dcb

    condition:
        7 of them and filesize < 801792
}