rule win_icedid_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.icedid."
        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"
        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 = { 7411 ff7500 56 ff15???????? }
            // n = 4, score = 1400
            //   7411                 | je                  0x13
            //   ff7500               | push                dword ptr [ebp]
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_1 = { 0fb74738 50 ff773c 51 51 ff15???????? }
            // n = 6, score = 1300
            //   0fb74738             | movzx               eax, word ptr [edi + 0x38]
            //   50                   | push                eax
            //   ff773c               | push                dword ptr [edi + 0x3c]
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   ff15????????         |                     

        $sequence_2 = { 50 ff15???????? 33c0 40 eb11 }
            // n = 5, score = 1300
            //   50                   | push                eax
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   40                   | inc                 eax
            //   eb11                 | jmp                 0x13

        $sequence_3 = { 742c 803e00 7427 6a3b 56 ff15???????? 8bf8 }
            // n = 7, score = 1300
            //   742c                 | je                  0x2e
            //   803e00               | cmp                 byte ptr [esi], 0
            //   7427                 | je                  0x29
            //   6a3b                 | push                0x3b
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax

        $sequence_4 = { 833e00 50 7413 ff36 6a08 ff15???????? 50 }
            // n = 7, score = 1300
            //   833e00               | cmp                 dword ptr [esi], 0
            //   50                   | push                eax
            //   7413                 | je                  0x15
            //   ff36                 | push                dword ptr [esi]
            //   6a08                 | push                8
            //   ff15????????         |                     
            //   50                   | push                eax

        $sequence_5 = { 7511 56 57 ff15???????? 50 ff15???????? }
            // n = 6, score = 1300
            //   7511                 | jne                 0x13
            //   56                   | push                esi
            //   57                   | push                edi
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_6 = { 85c0 7411 40 50 6a08 ff15???????? 50 }
            // n = 7, score = 1300
            //   85c0                 | test                eax, eax
            //   7411                 | je                  0x13
            //   40                   | inc                 eax
            //   50                   | push                eax
            //   6a08                 | push                8
            //   ff15????????         |                     
            //   50                   | push                eax

        $sequence_7 = { 57 6a00 ff15???????? 50 ff15???????? 8bc6 eb02 }
            // n = 7, score = 1300
            //   57                   | push                edi
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bc6                 | mov                 eax, esi
            //   eb02                 | jmp                 4

        $sequence_8 = { 50 ff15???????? eb0b 6a08 }
            // n = 4, score = 1200
            //   50                   | push                eax
            //   ff15????????         |                     
            //   eb0b                 | jmp                 0xd
            //   6a08                 | push                8

        $sequence_9 = { 8d4c2414 51 ff33 50 57 }
            // n = 5, score = 1000
            //   8d4c2414             | lea                 ecx, dword ptr [esp + 0x14]
            //   51                   | push                ecx
            //   ff33                 | push                dword ptr [ebx]
            //   50                   | push                eax
            //   57                   | push                edi

        $sequence_10 = { 8bf0 8d45fc 50 ff75fc 6a05 }
            // n = 5, score = 1000
            //   8bf0                 | mov                 esi, eax
            //   8d45fc               | lea                 eax, dword ptr [ebp - 4]
            //   50                   | push                eax
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   6a05                 | push                5

        $sequence_11 = { eb0b 6a08 ffd3 50 ff15???????? 8bf0 85f6 }
            // n = 7, score = 900
            //   eb0b                 | jmp                 0xd
            //   6a08                 | push                8
            //   ffd3                 | call                ebx
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   85f6                 | test                esi, esi

        $sequence_12 = { c3 51 51 8b4c240c 53 55 56 }
            // n = 7, score = 800
            //   c3                   | ret                 
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   8b4c240c             | mov                 ecx, dword ptr [esp + 0xc]
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   56                   | push                esi

        $sequence_13 = { 8d45fc 50 6a04 6a05 }
            // n = 4, score = 800
            //   8d45fc               | lea                 eax, dword ptr [ebp - 4]
            //   50                   | push                eax
            //   6a04                 | push                4
            //   6a05                 | push                5

        $sequence_14 = { 0132 47 83c302 3bfd 72c4 8b542414 0302 }
            // n = 7, score = 800
            //   0132                 | add                 dword ptr [edx], esi
            //   47                   | inc                 edi
            //   83c302               | add                 ebx, 2
            //   3bfd                 | cmp                 edi, ebp
            //   72c4                 | jb                  0xffffffc6
            //   8b542414             | mov                 edx, dword ptr [esp + 0x14]
            //   0302                 | add                 eax, dword ptr [edx]

        $sequence_15 = { 0fb6440b34 50 ff740b28 8b440b24 }
            // n = 4, score = 800
            //   0fb6440b34           | movzx               eax, byte ptr [ebx + ecx + 0x34]
            //   50                   | push                eax
            //   ff740b28             | push                dword ptr [ebx + ecx + 0x28]
            //   8b440b24             | mov                 eax, dword ptr [ebx + ecx + 0x24]

        $sequence_16 = { 5f 743f 8d5808 0fb713 }
            // n = 4, score = 800
            //   5f                   | pop                 edi
            //   743f                 | je                  0x41
            //   8d5808               | lea                 ebx, dword ptr [eax + 8]
            //   0fb713               | movzx               edx, word ptr [ebx]

        $sequence_17 = { ff7008 ff36 e8???????? 83c40c }
            // n = 4, score = 800
            //   ff7008               | push                dword ptr [eax + 8]
            //   ff36                 | push                dword ptr [esi]
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_18 = { 47 3b7820 72d1 5b 33c0 40 5f }
            // n = 7, score = 800
            //   47                   | inc                 edi
            //   3b7820               | cmp                 edi, dword ptr [eax + 0x20]
            //   72d1                 | jb                  0xffffffd3
            //   5b                   | pop                 ebx
            //   33c0                 | xor                 eax, eax
            //   40                   | inc                 eax
            //   5f                   | pop                 edi

        $sequence_19 = { 395e18 7505 b9???????? 50 }
            // n = 4, score = 700
            //   395e18               | cmp                 dword ptr [esi + 0x18], ebx
            //   7505                 | jne                 7
            //   b9????????           |                     
            //   50                   | push                eax

        $sequence_20 = { 53 ff15???????? 8b4608 6a00 ff7618 f7d8 }
            // n = 6, score = 700
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   8b4608               | mov                 eax, dword ptr [esi + 8]
            //   6a00                 | push                0
            //   ff7618               | push                dword ptr [esi + 0x18]
            //   f7d8                 | neg                 eax

        $sequence_21 = { ff7604 51 52 ff15???????? 8bd8 }
            // n = 5, score = 700
            //   ff7604               | push                dword ptr [esi + 4]
            //   51                   | push                ecx
            //   52                   | push                edx
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax

        $sequence_22 = { 53 55 56 57 33db 33f6 }
            // n = 6, score = 700
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   56                   | push                esi
            //   57                   | push                edi
            //   33db                 | xor                 ebx, ebx
            //   33f6                 | xor                 esi, esi

        $sequence_23 = { 8a4173 a808 75f5 a804 }
            // n = 4, score = 400
            //   8a4173               | mov                 al, byte ptr [ecx + 0x73]
            //   a808                 | test                al, 8
            //   75f5                 | jne                 0xfffffff7
            //   a804                 | test                al, 4

        $sequence_24 = { ff5010 85c0 7407 33c0 }
            // n = 4, score = 400
            //   ff5010               | call                dword ptr [eax + 0x10]
            //   85c0                 | test                eax, eax
            //   7407                 | je                  9
            //   33c0                 | xor                 eax, eax

        $sequence_25 = { ff15???????? 85c0 750a b8010000c0 }
            // n = 4, score = 400
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   750a                 | jne                 0xc
            //   b8010000c0           | mov                 eax, 0xc0000001

        $sequence_26 = { 894a20 48 8b5c2430 48 83c420 }
            // n = 5, score = 200
            //   894a20               | mov                 dword ptr [edx + 0x20], ecx
            //   48                   | dec                 eax
            //   8b5c2430             | mov                 ebx, dword ptr [esp + 0x30]
            //   48                   | dec                 eax
            //   83c420               | add                 esp, 0x20

        $sequence_27 = { 85e4 740d 44 8b431c 48 }
            // n = 5, score = 200
            //   85e4                 | test                esp, esp
            //   740d                 | je                  0xf
            //   44                   | inc                 esp
            //   8b431c               | mov                 eax, dword ptr [ebx + 0x1c]
            //   48                   | dec                 eax

        $sequence_28 = { 48 8b0d???????? 44 0fb6440b09 48 }
            // n = 5, score = 200
            //   48                   | dec                 eax
            //   8b0d????????         |                     
            //   44                   | inc                 esp
            //   0fb6440b09           | movzx               eax, byte ptr [ebx + ecx + 9]
            //   48                   | dec                 eax

        $sequence_29 = { 48 83ec18 48 8b442420 8b00 89442408 }
            // n = 6, score = 200
            //   48                   | dec                 eax
            //   83ec18               | sub                 esp, 0x18
            //   48                   | dec                 eax
            //   8b442420             | mov                 eax, dword ptr [esp + 0x20]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   89442408             | mov                 dword ptr [esp + 8], eax

        $sequence_30 = { 8b05???????? 48 8b5720 48 8b88c9030000 48 }
            // n = 6, score = 200
            //   8b05????????         |                     
            //   48                   | dec                 eax
            //   8b5720               | mov                 edx, dword ptr [edi + 0x20]
            //   48                   | dec                 eax
            //   8b88c9030000         | mov                 ecx, dword ptr [eax + 0x3c9]
            //   48                   | dec                 eax

    condition:
        7 of them and filesize < 303104
}