rule win_icedid_downloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.icedid_downloader"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { eb3a 83f801 750a 8b06 }
            // n = 4, score = 400
            //   eb3a                 | jmp                 0x3c
            //   83f801               | cmp                 eax, 1
            //   750a                 | jne                 0xc
            //   8b06                 | mov                 eax, dword ptr [esi]

        $sequence_1 = { 89442434 ffd3 50 8d442428 50 ff742438 ff15???????? }
            // n = 7, score = 400
            //   89442434             | mov                 dword ptr [esp + 0x34], eax
            //   ffd3                 | call                ebx
            //   50                   | push                eax
            //   8d442428             | lea                 eax, [esp + 0x28]
            //   50                   | push                eax
            //   ff742438             | push                dword ptr [esp + 0x38]
            //   ff15????????         |                     

        $sequence_2 = { 83c40c 85c0 7515 6830750000 ff15???????? }
            // n = 5, score = 400
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   7515                 | jne                 0x17
            //   6830750000           | push                0x7530
            //   ff15????????         |                     

        $sequence_3 = { 8d54244c 52 50 ff5114 85c0 752a 6a0b }
            // n = 7, score = 400
            //   8d54244c             | lea                 edx, [esp + 0x4c]
            //   52                   | push                edx
            //   50                   | push                eax
            //   ff5114               | call                dword ptr [ecx + 0x14]
            //   85c0                 | test                eax, eax
            //   752a                 | jne                 0x2c
            //   6a0b                 | push                0xb

        $sequence_4 = { 2d20020000 7414 83e801 740a 83e801 751c 80cb01 }
            // n = 7, score = 400
            //   2d20020000           | sub                 eax, 0x220
            //   7414                 | je                  0x16
            //   83e801               | sub                 eax, 1
            //   740a                 | je                  0xc
            //   83e801               | sub                 eax, 1
            //   751c                 | jne                 0x1e
            //   80cb01               | or                  bl, 1

        $sequence_5 = { 59 50 ffd3 8b4c2418 8bf8 8d442414 }
            // n = 6, score = 400
            //   59                   | pop                 ecx
            //   50                   | push                eax
            //   ffd3                 | call                ebx
            //   8b4c2418             | mov                 ecx, dword ptr [esp + 0x18]
            //   8bf8                 | mov                 edi, eax
            //   8d442414             | lea                 eax, [esp + 0x14]

        $sequence_6 = { e8???????? 59 59 8d442440 50 ffd3 }
            // n = 6, score = 400
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   8d442440             | lea                 eax, [esp + 0x40]
            //   50                   | push                eax
            //   ffd3                 | call                ebx

        $sequence_7 = { 83c410 8d442410 53 50 53 8d8424a0000000 }
            // n = 6, score = 400
            //   83c410               | add                 esp, 0x10
            //   8d442410             | lea                 eax, [esp + 0x10]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   53                   | push                ebx
            //   8d8424a0000000       | lea                 eax, [esp + 0xa0]

        $sequence_8 = { e8???????? ff75ec e8???????? ff75fc e8???????? 8bc3 }
            // n = 6, score = 400
            //   e8????????           |                     
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   e8????????           |                     
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   e8????????           |                     
            //   8bc3                 | mov                 eax, ebx

        $sequence_9 = { 8b7d08 83c70a 83ee0a 8bdf eb02 }
            // n = 5, score = 400
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   83c70a               | add                 edi, 0xa
            //   83ee0a               | sub                 esi, 0xa
            //   8bdf                 | mov                 ebx, edi
            //   eb02                 | jmp                 4

    condition:
        7 of them and filesize < 40960
}