win.qtbot (Back to overview)

QtBot

aka: qtproject

There is no description at this point.

References
https://researchcenter.paloaltonetworks.com/2017/11/unit42-everybody-gets-one-qtbot-used-distribute-trickbot-locky/
Yara Rules
[TLP:WHITE] win_qtbot_auto (20190620 | autogenerated rule brought to you by yara-signator)
rule win_qtbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2019-07-05"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator 0.2a"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.qtbot"
        malpedia_version = "20190620"
        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 / approach 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 = { 8b7d14 33f6 8bde 85ff 74?? 8b4510 89450c }
            // n = 7, score = 200
            //   8b7d14               | mov                 edi, dword ptr [ebp + 0x14]
            //   33f6                 | xor                 esi, esi
            //   8bde                 | mov                 ebx, esi
            //   85ff                 | test                edi, edi
            //   74??                 |                     
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax

        $sequence_1 = { 8bdf 8b443078 03c6 8b4824 8b5020 }
            // n = 5, score = 200
            //   8bdf                 | mov                 ebx, edi
            //   8b443078             | mov                 eax, dword ptr [eax + esi + 0x78]
            //   03c6                 | add                 eax, esi
            //   8b4824               | mov                 ecx, dword ptr [eax + 0x24]
            //   8b5020               | mov                 edx, dword ptr [eax + 0x20]

        $sequence_2 = { 85ff 74?? 8b4510 89450c 8d4301 }
            // n = 5, score = 200
            //   85ff                 | test                edi, edi
            //   74??                 |                     
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax
            //   8d4301               | lea                 eax, [ebx + 1]

        $sequence_3 = { 6bc80d 0fb6c3 83c0d0 03c1 25ffffff00 }
            // n = 5, score = 200
            //   6bc80d               | imul                ecx, eax, 0xd
            //   0fb6c3               | movzx               eax, bl
            //   83c0d0               | add                 eax, -0x30
            //   03c1                 | add                 eax, ecx
            //   25ffffff00           | and                 eax, 0xffffff

        $sequence_4 = { 8b450c 0fb6c9 8a8c0dfcfeffff 3008 40 89450c }
            // n = 6, score = 200
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   0fb6c9               | movzx               ecx, cl
            //   8a8c0dfcfeffff       | mov                 cl, byte ptr [ebp + ecx - 0x104]
            //   3008                 | xor                 byte ptr [eax], cl
            //   40                   | inc                 eax
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax

        $sequence_5 = { 8b4510 89450c 8d4301 0fb6d8 8a941dfcfeffff 0fb6c2 }
            // n = 6, score = 200
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax
            //   8d4301               | lea                 eax, [ebx + 1]
            //   0fb6d8               | movzx               ebx, al
            //   8a941dfcfeffff       | mov                 dl, byte ptr [ebp + ebx - 0x104]
            //   0fb6c2               | movzx               eax, dl

        $sequence_6 = { 74?? 8b049a 03c6 50 e8???????? 3b4508 }
            // n = 6, score = 200
            //   74??                 |                     
            //   8b049a               | mov                 eax, dword ptr [edx + ebx*4]
            //   03c6                 | add                 eax, esi
            //   50                   | push                eax
            //   e8????????           |                     
            //   3b4508               | cmp                 eax, dword ptr [ebp + 8]

        $sequence_7 = { 74?? 8b049a 03c6 50 e8???????? 3b4508 74?? }
            // n = 7, score = 200
            //   74??                 |                     
            //   8b049a               | mov                 eax, dword ptr [edx + ebx*4]
            //   03c6                 | add                 eax, esi
            //   50                   | push                eax
            //   e8????????           |                     
            //   3b4508               | cmp                 eax, dword ptr [ebp + 8]
            //   74??                 |                     

        $sequence_8 = { 75?? 8b46f8 8b04855c300010 c1e002 50 }
            // n = 5, score = 100
            //   75??                 |                     
            //   8b46f8               | mov                 eax, dword ptr [esi - 8]
            //   8b04855c300010       | mov                 eax, dword ptr [eax*4 + 0x1000305c]
            //   c1e002               | shl                 eax, 2
            //   50                   | push                eax

        $sequence_9 = { 83f801 75?? ffb198140000 6804400010 }
            // n = 4, score = 100
            //   83f801               | cmp                 eax, 1
            //   75??                 |                     
            //   ffb198140000         | push                dword ptr [ecx + 0x1498]
            //   6804400010           | push                0x10004004

        $sequence_10 = { 894500 ff15???????? 57 ff15???????? eb?? }
            // n = 5, score = 100
            //   894500               | mov                 dword ptr [ebp], eax
            //   ff15????????         |                     
            //   57                   | push                edi
            //   ff15????????         |                     
            //   eb??                 |                     

        $sequence_11 = { eb?? 8bef 8b06 83661c00 }
            // n = 4, score = 100
            //   eb??                 |                     
            //   8bef                 | mov                 ebp, edi
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   83661c00             | and                 dword ptr [esi + 0x1c], 0

        $sequence_12 = { 894e18 eb?? 6834400010 e8???????? 59 837e04ff 8bd8 }
            // n = 7, score = 100
            //   894e18               | mov                 dword ptr [esi + 0x18], ecx
            //   eb??                 |                     
            //   6834400010           | push                0x10004034
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   837e04ff             | cmp                 dword ptr [esi + 4], -1
            //   8bd8                 | mov                 ebx, eax

        $sequence_13 = { eb?? 897e1c 897d00 eb?? 803b00 74?? }
            // n = 6, score = 100
            //   eb??                 |                     
            //   897e1c               | mov                 dword ptr [esi + 0x1c], edi
            //   897d00               | mov                 dword ptr [ebp], edi
            //   eb??                 |                     
            //   803b00               | cmp                 byte ptr [ebx], 0
            //   74??                 |                     

        $sequence_14 = { 885c38ff eb?? ff36 6800400010 57 }
            // n = 5, score = 100
            //   885c38ff             | mov                 byte ptr [eax + edi - 1], bl
            //   eb??                 |                     
            //   ff36                 | push                dword ptr [esi]
            //   6800400010           | push                0x10004000
            //   57                   | push                edi

        $sequence_15 = { 50 89461c 57 894500 ff15???????? 57 }
            // n = 6, score = 100
            //   50                   | push                eax
            //   89461c               | mov                 dword ptr [esi + 0x1c], eax
            //   57                   | push                edi
            //   894500               | mov                 dword ptr [ebp], eax
            //   ff15????????         |                     
            //   57                   | push                edi

    condition:
        7 of them
}
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