rule win_turla_silentmoon_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.turla_silentmoon."
        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.turla_silentmoon"
        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 = { 7c10 c7460401000000 c745fc04000000 eb07 c745fc03000000 8b87a8130000 }
            // n = 6, score = 300
            //   7c10                 | jl                  0x12
            //   c7460401000000       | mov                 dword ptr [esi + 4], 1
            //   c745fc04000000       | mov                 dword ptr [ebp - 4], 4
            //   eb07                 | jmp                 9
            //   c745fc03000000       | mov                 dword ptr [ebp - 4], 3
            //   8b87a8130000         | mov                 eax, dword ptr [edi + 0x13a8]

        $sequence_1 = { 8955fc e8???????? 8b4df4 83c404 b801000000 d3c0 c745f0ffffffff }
            // n = 7, score = 300
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   e8????????           |                     
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   83c404               | add                 esp, 4
            //   b801000000           | mov                 eax, 1
            //   d3c0                 | rol                 eax, cl
            //   c745f0ffffffff       | mov                 dword ptr [ebp - 0x10], 0xffffffff

        $sequence_2 = { 6a00 51 ff15???????? 85db 7410 8b15???????? }
            // n = 6, score = 300
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   85db                 | test                ebx, ebx
            //   7410                 | je                  0x12
            //   8b15????????         |                     

        $sequence_3 = { 47 03c9 897dd0 3bfa 7ec7 8b45e4 }
            // n = 6, score = 300
            //   47                   | inc                 edi
            //   03c9                 | add                 ecx, ecx
            //   897dd0               | mov                 dword ptr [ebp - 0x30], edi
            //   3bfa                 | cmp                 edi, edx
            //   7ec7                 | jle                 0xffffffc9
            //   8b45e4               | mov                 eax, dword ptr [ebp - 0x1c]

        $sequence_4 = { 56 6a00 51 ffd7 8b15???????? 53 }
            // n = 6, score = 300
            //   56                   | push                esi
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   ffd7                 | call                edi
            //   8b15????????         |                     
            //   53                   | push                ebx

        $sequence_5 = { 8d857cfcffff 50 6a00 6a00 ff15???????? 8b15???????? 52 }
            // n = 7, score = 300
            //   8d857cfcffff         | lea                 eax, [ebp - 0x384]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   8b15????????         |                     
            //   52                   | push                edx

        $sequence_6 = { 8d9b00000000 8b4e4c 8b562c 8945cc 8a865b020000 88040a ff464c }
            // n = 7, score = 300
            //   8d9b00000000         | lea                 ebx, [ebx]
            //   8b4e4c               | mov                 ecx, dword ptr [esi + 0x4c]
            //   8b562c               | mov                 edx, dword ptr [esi + 0x2c]
            //   8945cc               | mov                 dword ptr [ebp - 0x34], eax
            //   8a865b020000         | mov                 al, byte ptr [esi + 0x25b]
            //   88040a               | mov                 byte ptr [edx + ecx], al
            //   ff464c               | inc                 dword ptr [esi + 0x4c]

        $sequence_7 = { 881408 ff464c c1a65802000008 83865c020000f8 83be5c02000008 8b55cc 7dd1 }
            // n = 7, score = 300
            //   881408               | mov                 byte ptr [eax + ecx], dl
            //   ff464c               | inc                 dword ptr [esi + 0x4c]
            //   c1a65802000008       | shl                 dword ptr [esi + 0x258], 8
            //   83865c020000f8       | add                 dword ptr [esi + 0x25c], -8
            //   83be5c02000008       | cmp                 dword ptr [esi + 0x25c], 8
            //   8b55cc               | mov                 edx, dword ptr [ebp - 0x34]
            //   7dd1                 | jge                 0xffffffd3

        $sequence_8 = { ff15???????? a1???????? 83c404 57 6a08 50 }
            // n = 6, score = 300
            //   ff15????????         |                     
            //   a1????????           |                     
            //   83c404               | add                 esp, 4
            //   57                   | push                edi
            //   6a08                 | push                8
            //   50                   | push                eax

        $sequence_9 = { 09be58020000 8b7df8 898e5c020000 0fb77c7b04 897df4 8b3cba 897dd4 }
            // n = 7, score = 300
            //   09be58020000         | or                  dword ptr [esi + 0x258], edi
            //   8b7df8               | mov                 edi, dword ptr [ebp - 8]
            //   898e5c020000         | mov                 dword ptr [esi + 0x25c], ecx
            //   0fb77c7b04           | movzx               edi, word ptr [ebx + edi*2 + 4]
            //   897df4               | mov                 dword ptr [ebp - 0xc], edi
            //   8b3cba               | mov                 edi, dword ptr [edx + edi*4]
            //   897dd4               | mov                 dword ptr [ebp - 0x2c], edi

    condition:
        7 of them and filesize < 204800
}