rule win_whispergate_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 0fb756fe 89c6 6683fa2f 74e8 6683fa5c 74e2 }
            // n = 6, score = 300
            //   0fb756fe             | movzx               edx, word ptr [esi - 2]
            //   89c6                 | mov                 esi, eax
            //   6683fa2f             | cmp                 dx, 0x2f
            //   74e8                 | je                  0xffffffea
            //   6683fa5c             | cmp                 dx, 0x5c
            //   74e2                 | je                  0xffffffe4

        $sequence_1 = { 83f97f 0f94c1 85c0 0f95c0 09c1 e9???????? 837dd427 }
            // n = 7, score = 300
            //   83f97f               | cmp                 ecx, 0x7f
            //   0f94c1               | sete                cl
            //   85c0                 | test                eax, eax
            //   0f95c0               | setne               al
            //   09c1                 | or                  ecx, eax
            //   e9????????           |                     
            //   837dd427             | cmp                 dword ptr [ebp - 0x2c], 0x27

        $sequence_2 = { 8d44240c 89c7 8945c8 0fb603 3c7f 7428 }
            // n = 6, score = 300
            //   8d44240c             | lea                 eax, [esp + 0xc]
            //   89c7                 | mov                 edi, eax
            //   8945c8               | mov                 dword ptr [ebp - 0x38], eax
            //   0fb603               | movzx               eax, byte ptr [ebx]
            //   3c7f                 | cmp                 al, 0x7f
            //   7428                 | je                  0x2a

        $sequence_3 = { 56 53 83ec3c 0fbe18 8954241c }
            // n = 5, score = 300
            //   56                   | push                esi
            //   53                   | push                ebx
            //   83ec3c               | sub                 esp, 0x3c
            //   0fbe18               | movsx               ebx, byte ptr [eax]
            //   8954241c             | mov                 dword ptr [esp + 0x1c], edx

        $sequence_4 = { 0f85d8fcffff e9???????? 3c7b 7408 8b65c0 e9???????? }
            // n = 6, score = 300
            //   0f85d8fcffff         | jne                 0xfffffcde
            //   e9????????           |                     
            //   3c7b                 | cmp                 al, 0x7b
            //   7408                 | je                  0xa
            //   8b65c0               | mov                 esp, dword ptr [ebp - 0x40]
            //   e9????????           |                     

        $sequence_5 = { 89c8 6685d2 7421 83c102 }
            // n = 4, score = 300
            //   89c8                 | mov                 eax, ecx
            //   6685d2               | test                dx, dx
            //   7421                 | je                  0x23
            //   83c102               | add                 ecx, 2

        $sequence_6 = { 75e8 890424 e8???????? 89c7 8b44241c }
            // n = 5, score = 300
            //   75e8                 | jne                 0xffffffea
            //   890424               | mov                 dword ptr [esp], eax
            //   e8????????           |                     
            //   89c7                 | mov                 edi, eax
            //   8b44241c             | mov                 eax, dword ptr [esp + 0x1c]

        $sequence_7 = { 8b4608 83ef01 8b0418 83c304 890424 e8???????? 83ffff }
            // n = 7, score = 300
            //   8b4608               | mov                 eax, dword ptr [esi + 8]
            //   83ef01               | sub                 edi, 1
            //   8b0418               | mov                 eax, dword ptr [eax + ebx]
            //   83c304               | add                 ebx, 4
            //   890424               | mov                 dword ptr [esp], eax
            //   e8????????           |                     
            //   83ffff               | cmp                 edi, -1

        $sequence_8 = { e8???????? 89d8 89fa c745d000000000 83c801 }
            // n = 5, score = 300
            //   e8????????           |                     
            //   89d8                 | mov                 eax, ebx
            //   89fa                 | mov                 edx, edi
            //   c745d000000000       | mov                 dword ptr [ebp - 0x30], 0
            //   83c801               | or                  eax, 1

        $sequence_9 = { 0fb65308 8d8700004000 83fa10 0f8495000000 }
            // n = 4, score = 300
            //   0fb65308             | movzx               edx, byte ptr [ebx + 8]
            //   8d8700004000         | lea                 eax, [edi + 0x400000]
            //   83fa10               | cmp                 edx, 0x10
            //   0f8495000000         | je                  0x9b

    condition:
        7 of them and filesize < 114688
}