rule win_icedid_downloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { ffd5 85f6 0f85fb000000 8d442440 50 68???????? e8???????? }
            // n = 7, score = 400
            //   ffd5                 | call                ebp
            //   85f6                 | test                esi, esi
            //   0f85fb000000         | jne                 0x101
            //   8d442440             | lea                 eax, [esp + 0x40]
            //   50                   | push                eax
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_1 = { c745f000100000 50 6a00 8d45f4 50 6aff }
            // n = 6, score = 400
            //   c745f000100000       | mov                 dword ptr [ebp - 0x10], 0x1000
            //   50                   | push                eax
            //   6a00                 | push                0
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   50                   | push                eax
            //   6aff                 | push                -1

        $sequence_2 = { 83c410 33f6 56 56 6a02 56 }
            // n = 6, score = 400
            //   83c410               | add                 esp, 0x10
            //   33f6                 | xor                 esi, esi
            //   56                   | push                esi
            //   56                   | push                esi
            //   6a02                 | push                2
            //   56                   | push                esi

        $sequence_3 = { 43 896c2410 55 896c2410 896c2418 896c241c }
            // n = 6, score = 400
            //   43                   | inc                 ebx
            //   896c2410             | mov                 dword ptr [esp + 0x10], ebp
            //   55                   | push                ebp
            //   896c2410             | mov                 dword ptr [esp + 0x10], ebp
            //   896c2418             | mov                 dword ptr [esp + 0x18], ebp
            //   896c241c             | mov                 dword ptr [esp + 0x1c], ebp

        $sequence_4 = { 50 6a08 6aff 885c241c ff15???????? 85c0 0f840f010000 }
            // n = 7, score = 400
            //   50                   | push                eax
            //   6a08                 | push                8
            //   6aff                 | push                -1
            //   885c241c             | mov                 byte ptr [esp + 0x1c], bl
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f840f010000         | je                  0x115

        $sequence_5 = { 8d442428 50 ff742438 ff15???????? 8d442440 50 68???????? }
            // n = 7, score = 400
            //   8d442428             | lea                 eax, [esp + 0x28]
            //   50                   | push                eax
            //   ff742438             | push                dword ptr [esp + 0x38]
            //   ff15????????         |                     
            //   8d442440             | lea                 eax, [esp + 0x40]
            //   50                   | push                eax
            //   68????????           |                     

        $sequence_6 = { ff15???????? 6a05 5b 8d4554 c7450001000000 50 }
            // n = 6, score = 400
            //   ff15????????         |                     
            //   6a05                 | push                5
            //   5b                   | pop                 ebx
            //   8d4554               | lea                 eax, [ebp + 0x54]
            //   c7450001000000       | mov                 dword ptr [ebp], 1
            //   50                   | push                eax

        $sequence_7 = { ff75f4 ff15???????? 8b45fc ff701c }
            // n = 4, score = 400
            //   ff75f4               | push                dword ptr [ebp - 0xc]
            //   ff15????????         |                     
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   ff701c               | push                dword ptr [eax + 0x1c]

        $sequence_8 = { 33c0 eb46 8d442440 50 68???????? e8???????? }
            // n = 6, score = 400
            //   33c0                 | xor                 eax, eax
            //   eb46                 | jmp                 0x48
            //   8d442440             | lea                 eax, [esp + 0x40]
            //   50                   | push                eax
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_9 = { 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]

    condition:
        7 of them and filesize < 40960
}