rule win_dustman_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.dustman."
        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.dustman"
        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 = { 0f8296f5ffff 488b8570010000 488b4008 0fbe18 660f6f05???????? f30f7f8590010000 664489b580010000 }
            // n = 7, score = 100
            //   0f8296f5ffff         | dec                 ecx
            //   488b8570010000       | add                 ecx, 0x4e
            //   488b4008             | dec                 eax
            //   0fbe18               | lea                 eax, [eax + 0x4e]
            //   660f6f05????????     |                     
            //   f30f7f8590010000     | inc                 ecx
            //   664489b580010000     | cmp                 eax, 0x4e

        $sequence_1 = { 4053 4883ec20 488bd9 4c8d0d54b30000 33c9 }
            // n = 5, score = 100
            //   4053                 | sub                 ecx, edx
            //   4883ec20             | dec                 esp
            //   488bd9               | lea                 ebx, [ebp + 0x1ec]
            //   4c8d0d54b30000       | dec                 ecx
            //   33c9                 | add                 ecx, ebx

        $sequence_2 = { 488b4d50 0fb60c01 88482a 488b4d58 0fb60c01 88482b }
            // n = 6, score = 100
            //   488b4d50             | add                 ecx, edx
            //   0fb60c01             | dec                 eax
            //   88482a               | mov                 dword ptr [ebp + 0x168], ecx
            //   488b4d58             | dec                 eax
            //   0fb60c01             | mov                 edx, dword ptr [esp + 0x30]
            //   88482b               | dec                 esp

        $sequence_3 = { 8bd0 e8???????? 488d152f900100 488d4c2420 e8???????? }
            // n = 5, score = 100
            //   8bd0                 | mov                 eax, dword ptr [esp + 0x74]
            //   e8????????           |                     
            //   488d152f900100       | dec                 eax
            //   488d4c2420           | mov                 dword ptr [esp + 0x30], eax
            //   e8????????           |                     

        $sequence_4 = { 75dd 488d056be30000 483bd8 74d1 }
            // n = 4, score = 100
            //   75dd                 | dec                 eax
            //   488d056be30000       | lea                 edx, [0x7cb2]
            //   483bd8               | movsd               xmm2, qword ptr [edx + eax*8]
            //   74d1                 | vaddsd              xmm2, xmm2, xmm5

        $sequence_5 = { 782e 3b0d???????? 7326 4863c9 488d153cde0000 488bc1 83e13f }
            // n = 7, score = 100
            //   782e                 | je                  0x303
            //   3b0d????????         |                     
            //   7326                 | je                  0x3a8
            //   4863c9               | dec                 ebp
            //   488d153cde0000       | mov                 esi, dword ptr [esi + esi*8 + 0x11758]
            //   488bc1               | xor                 edx, edx
            //   83e13f               | dec                 ecx

        $sequence_6 = { 488d05a8600000 483bc8 7410 b801000000 }
            // n = 4, score = 100
            //   488d05a8600000       | cmp                 eax, edi
            //   483bc8               | dec                 eax
            //   7410                 | mov                 dword ptr [ecx + 0x90], eax
            //   b801000000           | dec                 eax

        $sequence_7 = { 0f280d???????? 0f298dd0010000 f20f1005???????? f20f1185e0010000 8b05???????? }
            // n = 5, score = 100
            //   0f280d????????       |                     
            //   0f298dd0010000       | dec                 ecx
            //   f20f1005????????     |                     
            //   f20f1185e0010000     | add                 ecx, ebx
            //   8b05????????         |                     

        $sequence_8 = { 420fb60c10 884808 420fb60c18 884809 488b4c2450 0fb60c08 88480a }
            // n = 7, score = 100
            //   420fb60c10           | lea                 eax, [0xb266]
            //   884808               | dec                 eax
            //   420fb60c18           | mov                 edi, ecx
            //   884809               | dec                 eax
            //   488b4c2450           | sub                 esp, 0x20
            //   0fb60c08             | inc                 ecx
            //   88480a               | mov                 esi, eax

        $sequence_9 = { 4803fe e9???????? 0fb606 4d8bc5 4c2bc6 4a0fbebc3800b90100 8d4f01 }
            // n = 7, score = 100
            //   4803fe               | inc                 ebp
            //   e9????????           |                     
            //   0fb606               | xor                 ebx, ebx
            //   4d8bc5               | dec                 esp
            //   4c2bc6               | lea                 edx, [0xd94f]
            //   4a0fbebc3800b90100     | dec    eax
            //   8d4f01               | sub                 esp, 0x40

    condition:
        7 of them and filesize < 368640
}