rule win_powersniff_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.powersniff."
        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.powersniff"
        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 = { 03c7 53 8b9880000000 33c9 894dfc 3bd9 0f849c000000 }
            // n = 7, score = 100
            //   03c7                 | add                 eax, edi
            //   53                   | push                ebx
            //   8b9880000000         | mov                 ebx, dword ptr [eax + 0x80]
            //   33c9                 | xor                 ecx, ecx
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   3bd9                 | cmp                 ebx, ecx
            //   0f849c000000         | je                  0xa2

        $sequence_1 = { 8bd8 85db 7420 85ff 741c ff75fc 6a00 }
            // n = 7, score = 100
            //   8bd8                 | mov                 ebx, eax
            //   85db                 | test                ebx, ebx
            //   7420                 | je                  0x22
            //   85ff                 | test                edi, edi
            //   741c                 | je                  0x1e
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   6a00                 | push                0

        $sequence_2 = { 744e 81ffd2100000 7446 8b44240c ff44240c 83f805 7739 }
            // n = 7, score = 100
            //   744e                 | je                  0x50
            //   81ffd2100000         | cmp                 edi, 0x10d2
            //   7446                 | je                  0x48
            //   8b44240c             | mov                 eax, dword ptr [esp + 0xc]
            //   ff44240c             | inc                 dword ptr [esp + 0xc]
            //   83f805               | cmp                 eax, 5
            //   7739                 | ja                  0x3b

        $sequence_3 = { 8b149590780010 8975f8 0fb6f3 3314b5907c0010 8b5dfc c1eb08 0fb6f3 }
            // n = 7, score = 100
            //   8b149590780010       | mov                 edx, dword ptr [edx*4 + 0x10007890]
            //   8975f8               | mov                 dword ptr [ebp - 8], esi
            //   0fb6f3               | movzx               esi, bl
            //   3314b5907c0010       | xor                 edx, dword ptr [esi*4 + 0x10007c90]
            //   8b5dfc               | mov                 ebx, dword ptr [ebp - 4]
            //   c1eb08               | shr                 ebx, 8
            //   0fb6f3               | movzx               esi, bl

        $sequence_4 = { 8bd8 3bde 7558 8d45f0 50 8d45f8 }
            // n = 6, score = 100
            //   8bd8                 | mov                 ebx, eax
            //   3bde                 | cmp                 ebx, esi
            //   7558                 | jne                 0x5a
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   8d45f8               | lea                 eax, [ebp - 8]

        $sequence_5 = { 56 33f6 803d????????06 57 8975fc 7371 8d45f0 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   33f6                 | xor                 esi, esi
            //   803d????????06       |                     
            //   57                   | push                edi
            //   8975fc               | mov                 dword ptr [ebp - 4], esi
            //   7371                 | jae                 0x73
            //   8d45f0               | lea                 eax, [ebp - 0x10]

        $sequence_6 = { 0fb6fb 8b5df0 8975fc 8b75f8 }
            // n = 4, score = 100
            //   0fb6fb               | movzx               edi, bl
            //   8b5df0               | mov                 ebx, dword ptr [ebp - 0x10]
            //   8975fc               | mov                 dword ptr [ebp - 4], esi
            //   8b75f8               | mov                 esi, dword ptr [ebp - 8]

        $sequence_7 = { 53 33c9 8bd8 8b4508 56 be???????? }
            // n = 6, score = 100
            //   53                   | push                ebx
            //   33c9                 | xor                 ecx, ecx
            //   8bd8                 | mov                 ebx, eax
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   56                   | push                esi
            //   be????????           |                     

        $sequence_8 = { ff15???????? 8bf8 897df0 3bfb 7435 8d4508 50 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax
            //   897df0               | mov                 dword ptr [ebp - 0x10], edi
            //   3bfb                 | cmp                 edi, ebx
            //   7435                 | je                  0x37
            //   8d4508               | lea                 eax, [ebp + 8]
            //   50                   | push                eax

        $sequence_9 = { c1e208 0bd6 0fb6710b c1e208 0bd6 335008 }
            // n = 6, score = 100
            //   c1e208               | shl                 edx, 8
            //   0bd6                 | or                  edx, esi
            //   0fb6710b             | movzx               esi, byte ptr [ecx + 0xb]
            //   c1e208               | shl                 edx, 8
            //   0bd6                 | or                  edx, esi
            //   335008               | xor                 edx, dword ptr [eax + 8]

    condition:
        7 of them and filesize < 90112
}