rule win_icedid_downloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.icedid_downloader"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 8b45fc 8d75b4 83ec10 8bfc 8b08 50 }
            // n = 6, score = 400
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8d75b4               | lea                 esi, [ebp - 0x4c]
            //   83ec10               | sub                 esp, 0x10
            //   8bfc                 | mov                 edi, esp
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   50                   | push                eax

        $sequence_1 = { 57 8d442440 50 68???????? e8???????? 8b1d???????? }
            // n = 6, score = 400
            //   57                   | push                edi
            //   8d442440             | lea                 eax, [esp + 0x40]
            //   50                   | push                eax
            //   68????????           |                     
            //   e8????????           |                     
            //   8b1d????????         |                     

        $sequence_2 = { 50 8d45d4 66895d04 50 57 }
            // n = 5, score = 400
            //   50                   | push                eax
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   66895d04             | mov                 word ptr [ebp + 4], bx
            //   50                   | push                eax
            //   57                   | push                edi

        $sequence_3 = { 89b5e4feffff 8d85e4feffff 50 e8???????? 85c0 }
            // n = 5, score = 400
            //   89b5e4feffff         | mov                 dword ptr [ebp - 0x11c], esi
            //   8d85e4feffff         | lea                 eax, [ebp - 0x11c]
            //   50                   | push                eax
            //   e8????????           |                     
            //   85c0                 | test                eax, eax

        $sequence_4 = { ff7508 895dfc 895df4 895df8 895dec 895de4 }
            // n = 6, score = 400
            //   ff7508               | push                dword ptr [ebp + 8]
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   895df4               | mov                 dword ptr [ebp - 0xc], ebx
            //   895df8               | mov                 dword ptr [ebp - 8], ebx
            //   895dec               | mov                 dword ptr [ebp - 0x14], ebx
            //   895de4               | mov                 dword ptr [ebp - 0x1c], ebx

        $sequence_5 = { 59 56 8b08 52 }
            // n = 4, score = 400
            //   59                   | pop                 ecx
            //   56                   | push                esi
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   52                   | push                edx

        $sequence_6 = { ff5114 85c0 752a 6a0b }
            // n = 4, score = 400
            //   ff5114               | call                dword ptr [ecx + 0x14]
            //   85c0                 | test                eax, eax
            //   752a                 | jne                 0x2c
            //   6a0b                 | push                0xb

        $sequence_7 = { 50 ff742438 ff15???????? 8d442440 50 68???????? e8???????? }
            // n = 7, score = 400
            //   50                   | push                eax
            //   ff742438             | push                dword ptr [esp + 0x38]
            //   ff15????????         |                     
            //   8d442440             | lea                 eax, [esp + 0x40]
            //   50                   | push                eax
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_8 = { 395df0 0f8424010000 56 8d45d0 c745d00c000000 8945cc 8d45fc }
            // n = 7, score = 400
            //   395df0               | cmp                 dword ptr [ebp - 0x10], ebx
            //   0f8424010000         | je                  0x12a
            //   56                   | push                esi
            //   8d45d0               | lea                 eax, [ebp - 0x30]
            //   c745d00c000000       | mov                 dword ptr [ebp - 0x30], 0xc
            //   8945cc               | mov                 dword ptr [ebp - 0x34], eax
            //   8d45fc               | lea                 eax, [ebp - 4]

        $sequence_9 = { ff5024 8b4d68 8bf0 51 8b11 ff5208 }
            // n = 6, score = 400
            //   ff5024               | call                dword ptr [eax + 0x24]
            //   8b4d68               | mov                 ecx, dword ptr [ebp + 0x68]
            //   8bf0                 | mov                 esi, eax
            //   51                   | push                ecx
            //   8b11                 | mov                 edx, dword ptr [ecx]
            //   ff5208               | call                dword ptr [edx + 8]

    condition:
        7 of them and filesize < 40960
}