rule win_whispergate_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.whispergate."
        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.whispergate"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 7540 83f901 753b 83e901 0f8483000000 8802 0fb64701 }
            // n = 7, score = 300
            //   7540                 | jne                 0x42
            //   83f901               | cmp                 ecx, 1
            //   753b                 | jne                 0x3d
            //   83e901               | sub                 ecx, 1
            //   0f8483000000         | je                  0x89
            //   8802                 | mov                 byte ptr [edx], al
            //   0fb64701             | movzx               eax, byte ptr [edi + 1]

        $sequence_1 = { 0f8469010000 80f93f 0f84ed000000 80f95b 0f84b3000000 80f92a }
            // n = 6, score = 300
            //   0f8469010000         | je                  0x16f
            //   80f93f               | cmp                 cl, 0x3f
            //   0f84ed000000         | je                  0xf3
            //   80f95b               | cmp                 cl, 0x5b
            //   0f84b3000000         | je                  0xb9
            //   80f92a               | cmp                 cl, 0x2a

        $sequence_2 = { 66894306 83d100 0fb7c0 0fb644043c 84c0 8801 }
            // n = 6, score = 300
            //   66894306             | mov                 word ptr [ebx + 6], ax
            //   83d100               | adc                 ecx, 0
            //   0fb7c0               | movzx               eax, ax
            //   0fb644043c           | movzx               eax, byte ptr [esp + eax + 0x3c]
            //   84c0                 | test                al, al
            //   8801                 | mov                 byte ptr [ecx], al

        $sequence_3 = { 0f85ebfdffff 66837f0400 0f85e0fdffff 895c2404 c7042402000000 }
            // n = 5, score = 300
            //   0f85ebfdffff         | jne                 0xfffffdf1
            //   66837f0400           | cmp                 word ptr [edi + 4], 0
            //   0f85e0fdffff         | jne                 0xfffffde6
            //   895c2404             | mov                 dword ptr [esp + 4], ebx
            //   c7042402000000       | mov                 dword ptr [esp], 2

        $sequence_4 = { 0fbe5fff 84db 0f8486010000 f744241400400000 }
            // n = 4, score = 300
            //   0fbe5fff             | movsx               ebx, byte ptr [edi - 1]
            //   84db                 | test                bl, bl
            //   0f8486010000         | je                  0x18c
            //   f744241400400000     | test                dword ptr [esp + 0x14], 0x4000

        $sequence_5 = { 7415 8b75d4 bf???????? b902000000 f3a6 0f840b050000 8b45d4 }
            // n = 7, score = 300
            //   7415                 | je                  0x17
            //   8b75d4               | mov                 esi, dword ptr [ebp - 0x2c]
            //   bf????????           |                     
            //   b902000000           | mov                 ecx, 2
            //   f3a6                 | repe cmpsb          byte ptr [esi], byte ptr es:[edi]
            //   0f840b050000         | je                  0x511
            //   8b45d4               | mov                 eax, dword ptr [ebp - 0x2c]

        $sequence_6 = { 7425 0fb603 3c5d 7416 3c7f 75ee }
            // n = 6, score = 300
            //   7425                 | je                  0x27
            //   0fb603               | movzx               eax, byte ptr [ebx]
            //   3c5d                 | cmp                 al, 0x5d
            //   7416                 | je                  0x18
            //   3c7f                 | cmp                 al, 0x7f
            //   75ee                 | jne                 0xfffffff0

        $sequence_7 = { 83c301 ebe3 890c24 e8???????? }
            // n = 4, score = 300
            //   83c301               | add                 ebx, 1
            //   ebe3                 | jmp                 0xffffffe5
            //   890c24               | mov                 dword ptr [esp], ecx
            //   e8????????           |                     

        $sequence_8 = { 84c0 8842ff 7410 0fb603 }
            // n = 4, score = 300
            //   84c0                 | test                al, al
            //   8842ff               | mov                 byte ptr [edx - 1], al
            //   7410                 | je                  0x12
            //   0fb603               | movzx               eax, byte ptr [ebx]

        $sequence_9 = { c706???????? 893424 8b4d10 89fa 89d8 e8???????? }
            // n = 6, score = 300
            //   c706????????         |                     
            //   893424               | mov                 dword ptr [esp], esi
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   89fa                 | mov                 edx, edi
            //   89d8                 | mov                 eax, ebx
            //   e8????????           |                     

    condition:
        7 of them and filesize < 114688
}