rule win_magniber_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        version = "1"
        description = "Detects win.magniber."
        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.magniber"
        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 = { 8b5508 81c254020000 52 8b4508 }
            // n = 4, score = 400
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   81c254020000         | add                 edx, 0x254
            //   52                   | push                edx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_1 = { ff15???????? 6808020000 8d855cf5ffff 50 e8???????? 83c408 }
            // n = 6, score = 400
            //   ff15????????         |                     
            //   6808020000           | push                0x208
            //   8d855cf5ffff         | lea                 eax, [ebp - 0xaa4]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8

        $sequence_2 = { 51 ff15???????? 8945d0 8b55e0 0355d0 8d441204 }
            // n = 6, score = 400
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8945d0               | mov                 dword ptr [ebp - 0x30], eax
            //   8b55e0               | mov                 edx, dword ptr [ebp - 0x20]
            //   0355d0               | add                 edx, dword ptr [ebp - 0x30]
            //   8d441204             | lea                 eax, [edx + edx + 4]

        $sequence_3 = { 6a00 8d45f0 50 8b4de8 51 8b55fc }
            // n = 6, score = 400
            //   6a00                 | push                0
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   8b4de8               | mov                 ecx, dword ptr [ebp - 0x18]
            //   51                   | push                ecx
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]

        $sequence_4 = { 8b55f8 895108 8b45f4 8b08 }
            // n = 4, score = 400
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   895108               | mov                 dword ptr [ecx + 8], edx
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   8b08                 | mov                 ecx, dword ptr [eax]

        $sequence_5 = { c785e8fcffffd4984000 c785ecfcffffdc984000 c785f0fcffffe8984000 c785f4fcfffff4984000 c785f8fcffff00994000 }
            // n = 5, score = 400
            //   c785e8fcffffd4984000     | mov    dword ptr [ebp - 0x318], 0x4098d4
            //   c785ecfcffffdc984000     | mov    dword ptr [ebp - 0x314], 0x4098dc
            //   c785f0fcffffe8984000     | mov    dword ptr [ebp - 0x310], 0x4098e8
            //   c785f4fcfffff4984000     | mov    dword ptr [ebp - 0x30c], 0x4098f4
            //   c785f8fcffff00994000     | mov    dword ptr [ebp - 0x308], 0x409900

        $sequence_6 = { c78564faffff68934000 c78568faffff70934000 c7856cfaffff78934000 c78570faffff80934000 }
            // n = 4, score = 400
            //   c78564faffff68934000     | mov    dword ptr [ebp - 0x59c], 0x409368
            //   c78568faffff70934000     | mov    dword ptr [ebp - 0x598], 0x409370
            //   c7856cfaffff78934000     | mov    dword ptr [ebp - 0x594], 0x409378
            //   c78570faffff80934000     | mov    dword ptr [ebp - 0x590], 0x409380

        $sequence_7 = { 50 ff15???????? 83f810 7505 e9???????? }
            // n = 5, score = 400
            //   50                   | push                eax
            //   ff15????????         |                     
            //   83f810               | cmp                 eax, 0x10
            //   7505                 | jne                 7
            //   e9????????           |                     

        $sequence_8 = { 184026 e221 a1????????05eef081 e0f8 29aed0515fa6 }
            // n = 5, score = 100
            //   184026               | dec                 eax
            //   e221                 | xor                 al, 0xb0
            //   a1????????05eef081     |     
            //   e0f8                 | sbb                 byte ptr [eax + 0x26], al
            //   29aed0515fa6         | sbb                 byte ptr [eax + 0x26], al

        $sequence_9 = { 32cb 5a b3b1 3e6c 21746c2e 4834b0 184026 }
            // n = 7, score = 100
            //   32cb                 | outsb               dx, byte ptr [esi]
            //   5a                   | fcomp               dword ptr [ebx - 0x6b64d635]
            //   b3b1                 | xor                 cl, bl
            //   3e6c                 | pop                 edx
            //   21746c2e             | mov                 bl, 0xb1
            //   4834b0               | insb                byte ptr es:[edi], dx
            //   184026               | and                 dword ptr [esp + ebp*2 + 0x2e], esi

        $sequence_10 = { 29aed0515fa6 8d4f0e 7f4c c82cd1c6 1a32 }
            // n = 5, score = 100
            //   29aed0515fa6         | push                edx
            //   8d4f0e               | cld                 
            //   7f4c                 | sub                 byte ptr [edi + 0x44], bl
            //   c82cd1c6             | sub                 dword ptr [esi - 0x59a0ae30], ebp
            //   1a32                 | lea                 ecx, [edi + 0xe]

        $sequence_11 = { f76e9f 32d8 2d7a350e78 95 }
            // n = 4, score = 100
            //   f76e9f               | dec                 esi
            //   32d8                 | dec                 esi
            //   2d7a350e78           | push                esp
            //   95                   | jo                  0xffffffb1

        $sequence_12 = { 52 fc 285f44 c1c70d 11fb }
            // n = 5, score = 100
            //   52                   | cmpsb               byte ptr [esi], byte ptr es:[edi]
            //   fc                   | outsb               dx, byte ptr [esi]
            //   285f44               | push                edx
            //   c1c70d               | cld                 
            //   11fb                 | sub                 byte ptr [edi + 0x44], bl

        $sequence_13 = { d331 4e4e54 70ac 52 f8 a6 6e }
            // n = 7, score = 100
            //   d331                 | sal                 dword ptr [ecx], cl
            //   4e4e54               | dec                 esi
            //   70ac                 | dec                 esi
            //   52                   | push                esp
            //   f8                   | jo                  0xffffffae
            //   a6                   | push                edx
            //   6e                   | clc                 

        $sequence_14 = { 56 18cb 52 fc }
            // n = 4, score = 100
            //   56                   | sub                 dword ptr [esi - 0x59a0ae30], ebp
            //   18cb                 | jo                  0xffffffae
            //   52                   | push                edx
            //   fc                   | clc                 

    condition:
        7 of them and filesize < 117760
}