rule win_icedid_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2019-07-05"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator 0.2a"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.icedid"
        malpedia_version = "20190620"
        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 / approach 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 = { d1c8 f7d0 d1c8 2d20010000 d1c0 f7d0 }
            // n = 6, score = 1200
            //   d1c8                 | ror                 eax, 1
            //   f7d0                 | not                 eax
            //   d1c8                 | ror                 eax, 1
            //   2d20010000           | sub                 eax, 0x120
            //   d1c0                 | rol                 eax, 1
            //   f7d0                 | not                 eax

        $sequence_1 = { f7d0 d1c8 2d20010000 d1c0 f7d0 }
            // n = 5, score = 1200
            //   f7d0                 | not                 eax
            //   d1c8                 | ror                 eax, 1
            //   2d20010000           | sub                 eax, 0x120
            //   d1c0                 | rol                 eax, 1
            //   f7d0                 | not                 eax

        $sequence_2 = { d1c8 f7d0 d1c8 2d20010000 d1c0 }
            // n = 5, score = 1200
            //   d1c8                 | ror                 eax, 1
            //   f7d0                 | not                 eax
            //   d1c8                 | ror                 eax, 1
            //   2d20010000           | sub                 eax, 0x120
            //   d1c0                 | rol                 eax, 1

        $sequence_3 = { d1c8 2d20010000 d1c0 f7d0 }
            // n = 4, score = 1200
            //   d1c8                 | ror                 eax, 1
            //   2d20010000           | sub                 eax, 0x120
            //   d1c0                 | rol                 eax, 1
            //   f7d0                 | not                 eax

        $sequence_4 = { d1c8 f7d0 d1c8 2d20010000 }
            // n = 4, score = 1200
            //   d1c8                 | ror                 eax, 1
            //   f7d0                 | not                 eax
            //   d1c8                 | ror                 eax, 1
            //   2d20010000           | sub                 eax, 0x120

        $sequence_5 = { f7d0 d1c8 2d20010000 d1c0 }
            // n = 4, score = 1200
            //   f7d0                 | not                 eax
            //   d1c8                 | ror                 eax, 1
            //   2d20010000           | sub                 eax, 0x120
            //   d1c0                 | rol                 eax, 1

        $sequence_6 = { d1c8 f7d0 d1c8 2d20010000 }
            // n = 4, score = 1200
            //   d1c8                 | ror                 eax, 1
            //   f7d0                 | not                 eax
            //   d1c8                 | ror                 eax, 1
            //   2d20010000           | sub                 eax, 0x120

        $sequence_7 = { 74?? 6a3b 56 ff15???????? 8bf8 }
            // n = 5, score = 1100
            //   74??                 |                     
            //   6a3b                 | push                0x3b
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax

        $sequence_8 = { be01000080 50 56 ff15???????? }
            // n = 4, score = 1100
            //   be01000080           | mov                 esi, 0x80000001
            //   50                   | push                eax
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_9 = { 73?? 33ed 396f18 76?? }
            // n = 4, score = 500
            //   73??                 |                     
            //   33ed                 | xor                 ebp, ebp
            //   396f18               | cmp                 dword ptr [edi + 0x18], ebp
            //   76??                 |                     

        $sequence_10 = { ff15???????? 85c0 75?? b8010000c0 e9???????? }
            // n = 5, score = 400
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   75??                 |                     
            //   b8010000c0           | mov                 eax, 0xc0000001
            //   e9????????           |                     

        $sequence_11 = { 8a4173 a808 75?? a804 }
            // n = 4, score = 400
            //   8a4173               | mov                 al, byte ptr [ecx + 0x73]
            //   a808                 | test                al, 8
            //   75??                 |                     
            //   a804                 | test                al, 4

        $sequence_12 = { a808 75?? a804 74?? }
            // n = 4, score = 400
            //   a808                 | test                al, 8
            //   75??                 |                     
            //   a804                 | test                al, 4
            //   74??                 |                     

        $sequence_13 = { e8???????? eb?? 66893d???????? eb?? }
            // n = 4, score = 400
            //   e8????????           |                     
            //   eb??                 |                     
            //   66893d????????       |                     
            //   eb??                 |                     

        $sequence_14 = { ff5010 85c0 74?? 33c0 e9???????? }
            // n = 5, score = 400
            //   ff5010               | call                dword ptr [eax + 0x10]
            //   85c0                 | test                eax, eax
            //   74??                 |                     
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     

        $sequence_15 = { 74?? 8a07 0fb6c0 03c1 }
            // n = 4, score = 400
            //   74??                 |                     
            //   8a07                 | mov                 al, byte ptr [edi]
            //   0fb6c0               | movzx               eax, al
            //   03c1                 | add                 eax, ecx

        $sequence_16 = { 8a4173 a808 75?? a804 74?? }
            // n = 5, score = 400
            //   8a4173               | mov                 al, byte ptr [ecx + 0x73]
            //   a808                 | test                al, 8
            //   75??                 |                     
            //   a804                 | test                al, 4
            //   74??                 |                     

    condition:
        7 of them
}