rule win_icedid_downloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.icedid_downloader."
        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.icedid_downloader"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { ff514c 85c0 0f85a1000000 8b442420 }
            // n = 4, score = 400
            //   ff514c               | call                dword ptr [ecx + 0x4c]
            //   85c0                 | test                eax, eax
            //   0f85a1000000         | jne                 0xa7
            //   8b442420             | mov                 eax, dword ptr [esp + 0x20]

        $sequence_1 = { 50 ff15???????? ff75f8 8d85a8fdffff 50 ff15???????? 6a04 }
            // n = 7, score = 400
            //   50                   | push                eax
            //   ff15????????         |                     
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   8d85a8fdffff         | lea                 eax, dword ptr [ebp - 0x258]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   6a04                 | push                4

        $sequence_2 = { 85f6 0f85fb000000 8d442440 50 68???????? e8???????? 59 }
            // n = 7, score = 400
            //   85f6                 | test                esi, esi
            //   0f85fb000000         | jne                 0x101
            //   8d442440             | lea                 eax, dword ptr [esp + 0x40]
            //   50                   | push                eax
            //   68????????           |                     
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_3 = { 80cb01 eb13 80cb02 eb0e 8b07 2410 }
            // n = 6, score = 400
            //   80cb01               | or                  bl, 1
            //   eb13                 | jmp                 0x15
            //   80cb02               | or                  bl, 2
            //   eb0e                 | jmp                 0x10
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   2410                 | and                 al, 0x10

        $sequence_4 = { 64a118000000 59 59 6804010000 8b4030 8945fc 8d85a8fdffff }
            // n = 7, score = 400
            //   64a118000000         | mov                 eax, dword ptr fs:[0x18]
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   6804010000           | push                0x104
            //   8b4030               | mov                 eax, dword ptr [eax + 0x30]
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8d85a8fdffff         | lea                 eax, dword ptr [ebp - 0x258]

        $sequence_5 = { 56 68000000c0 ff7510 ff15???????? }
            // n = 4, score = 400
            //   56                   | push                esi
            //   68000000c0           | push                0xc0000000
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff15????????         |                     

        $sequence_6 = { ff5218 57 8bf0 ffd5 }
            // n = 4, score = 400
            //   ff5218               | call                dword ptr [edx + 0x18]
            //   57                   | push                edi
            //   8bf0                 | mov                 esi, eax
            //   ffd5                 | call                ebp

        $sequence_7 = { ff15???????? 6a05 5b 8d4554 c7450001000000 50 }
            // n = 6, score = 400
            //   ff15????????         |                     
            //   6a05                 | push                5
            //   5b                   | pop                 ebx
            //   8d4554               | lea                 eax, dword ptr [ebp + 0x54]
            //   c7450001000000       | mov                 dword ptr [ebp], 1
            //   50                   | push                eax

        $sequence_8 = { 50 ff75f4 ff15???????? 8b45fc ff701c e8???????? }
            // n = 6, score = 400
            //   50                   | push                eax
            //   ff75f4               | push                dword ptr [ebp - 0xc]
            //   ff15????????         |                     
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   ff701c               | push                dword ptr [eax + 0x1c]
            //   e8????????           |                     

        $sequence_9 = { e8???????? 8b45fc ff701c e8???????? }
            // n = 4, score = 400
            //   e8????????           |                     
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   ff701c               | push                dword ptr [eax + 0x1c]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 40960
}