rule win_whispergate_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { 8b65c4 8d65f4 5b 5e }
            // n = 4, score = 300
            //   8b65c4               | mov                 esp, dword ptr [ebp - 0x3c]
            //   8d65f4               | lea                 esp, [ebp - 0xc]
            //   5b                   | pop                 ebx
            //   5e                   | pop                 esi

        $sequence_1 = { e8???????? 8965c4 890424 89c6 e8???????? }
            // n = 5, score = 300
            //   e8????????           |                     
            //   8965c4               | mov                 dword ptr [ebp - 0x3c], esp
            //   890424               | mov                 dword ptr [esp], eax
            //   89c6                 | mov                 esi, eax
            //   e8????????           |                     

        $sequence_2 = { 6683fa2f 0f8579ffffff 8db600000000 83c002 }
            // n = 4, score = 300
            //   6683fa2f             | cmp                 dx, 0x2f
            //   0f8579ffffff         | jne                 0xffffff7f
            //   8db600000000         | lea                 esi, [esi]
            //   83c002               | add                 eax, 2

        $sequence_3 = { 8945a4 e9???????? 8b55d0 89d8 e8???????? 85c0 }
            // n = 6, score = 300
            //   8945a4               | mov                 dword ptr [ebp - 0x5c], eax
            //   e9????????           |                     
            //   8b55d0               | mov                 edx, dword ptr [ebp - 0x30]
            //   89d8                 | mov                 eax, ebx
            //   e8????????           |                     
            //   85c0                 | test                eax, eax

        $sequence_4 = { 5f 5d c3 83c701 e9???????? 0f8e3dfeffff 89742424 }
            // n = 7, score = 300
            //   5f                   | pop                 edi
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   83c701               | add                 edi, 1
            //   e9????????           |                     
            //   0f8e3dfeffff         | jle                 0xfffffe43
            //   89742424             | mov                 dword ptr [esp + 0x24], esi

        $sequence_5 = { 85c0 7409 c70424???????? ffd0 a1???????? 85c0 740b }
            // n = 7, score = 300
            //   85c0                 | test                eax, eax
            //   7409                 | je                  0xb
            //   c70424????????       |                     
            //   ffd0                 | call                eax
            //   a1????????           |                     
            //   85c0                 | test                eax, eax
            //   740b                 | je                  0xd

        $sequence_6 = { c745d400000000 8d442410 c745d000000000 89c2 }
            // n = 4, score = 300
            //   c745d400000000       | mov                 dword ptr [ebp - 0x2c], 0
            //   8d442410             | lea                 eax, [esp + 0x10]
            //   c745d000000000       | mov                 dword ptr [ebp - 0x30], 0
            //   89c2                 | mov                 edx, eax

        $sequence_7 = { 55 89e5 81ec00020000 83e4f0 0fae0424 }
            // n = 5, score = 300
            //   55                   | push                ebp
            //   89e5                 | mov                 ebp, esp
            //   81ec00020000         | sub                 esp, 0x200
            //   83e4f0               | and                 esp, 0xfffffff0
            //   0fae0424             | fxsave              [esp]

        $sequence_8 = { e8???????? 85c0 0f84b2feffff 897008 c7400400000000 c70000000000 }
            // n = 6, score = 300
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f84b2feffff         | je                  0xfffffeb8
            //   897008               | mov                 dword ptr [eax + 8], esi
            //   c7400400000000       | mov                 dword ptr [eax + 4], 0
            //   c70000000000         | mov                 dword ptr [eax], 0

        $sequence_9 = { 84c0 8842ff 7410 0fb603 3c7f 75ec 0fb64301 }
            // n = 7, score = 300
            //   84c0                 | test                al, al
            //   8842ff               | mov                 byte ptr [edx - 1], al
            //   7410                 | je                  0x12
            //   0fb603               | movzx               eax, byte ptr [ebx]
            //   3c7f                 | cmp                 al, 0x7f
            //   75ec                 | jne                 0xffffffee
            //   0fb64301             | movzx               eax, byte ptr [ebx + 1]

    condition:
        7 of them and filesize < 114688
}