SYMBOLCOMMON_NAMEaka. SYNONYMS
win.qtbot (Back to overview)

QtBot

aka: qtproject

There is no description at this point.

References
2017-11-01Palo Alto Networks Unit 42Brandon Levene, Brandon Young, Dominik Reichel
@online{levene:20171101:everybody:9473c82, author = {Brandon Levene and Brandon Young and Dominik Reichel}, title = {{Everybody Gets One: QtBot Used to Distribute Trickbot and Locky}}, date = {2017-11-01}, organization = {Palo Alto Networks Unit 42}, url = {https://researchcenter.paloaltonetworks.com/2017/11/unit42-everybody-gets-one-qtbot-used-distribute-trickbot-locky/}, language = {English}, urldate = {2019-12-20} } Everybody Gets One: QtBot Used to Distribute Trickbot and Locky
QtBot
Yara Rules
[TLP:WHITE] win_qtbot_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_qtbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.qtbot"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 0fb6c2 03c8 8b450c 0fb6c9 }
            // n = 4, score = 200
            //   0fb6c2               | movzx               eax, dl
            //   03c8                 | add                 ecx, eax
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   0fb6c9               | movzx               ecx, cl

        $sequence_1 = { 89450c 8d4301 0fb6d8 8a941dfcfeffff }
            // n = 4, score = 200
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax
            //   8d4301               | lea                 eax, [ebx + 1]
            //   0fb6d8               | movzx               ebx, al
            //   8a941dfcfeffff       | mov                 dl, byte ptr [ebp + ebx - 0x104]

        $sequence_2 = { 50 e8???????? 3b4508 740b }
            // n = 4, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   3b4508               | cmp                 eax, dword ptr [ebp + 8]
            //   740b                 | je                  0xd

        $sequence_3 = { 42 8a1a 84db 75e9 }
            // n = 4, score = 200
            //   42                   | inc                 edx
            //   8a1a                 | mov                 bl, byte ptr [edx]
            //   84db                 | test                bl, bl
            //   75e9                 | jne                 0xffffffeb

        $sequence_4 = { 8b049a 03c6 50 e8???????? }
            // n = 4, score = 200
            //   8b049a               | mov                 eax, dword ptr [edx + ebx*4]
            //   03c6                 | add                 eax, esi
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_5 = { 33c0 53 8a1a 6bc80d 0fb6c3 }
            // n = 5, score = 200
            //   33c0                 | xor                 eax, eax
            //   53                   | push                ebx
            //   8a1a                 | mov                 bl, byte ptr [edx]
            //   6bc80d               | imul                ecx, eax, 0xd
            //   0fb6c3               | movzx               eax, bl

        $sequence_6 = { 8b450c 0fb6c9 8a8c0dfcfeffff 3008 40 }
            // n = 5, 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

        $sequence_7 = { 40 89450c 83ef01 75b1 8b4510 }
            // n = 5, score = 200
            //   40                   | inc                 eax
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax
            //   83ef01               | sub                 edi, 1
            //   75b1                 | jne                 0xffffffb3
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]

        $sequence_8 = { 837e04ff 8bd8 8d7e08 7504 8b2f }
            // n = 5, score = 100
            //   837e04ff             | cmp                 dword ptr [esi + 4], -1
            //   8bd8                 | mov                 ebx, eax
            //   8d7e08               | lea                 edi, [esi + 8]
            //   7504                 | jne                 6
            //   8b2f                 | mov                 ebp, dword ptr [edi]

        $sequence_9 = { 8b46f8 834de4ff 49 c745e8ff000000 8b3c857c300010 }
            // n = 5, score = 100
            //   8b46f8               | mov                 eax, dword ptr [esi - 8]
            //   834de4ff             | or                  dword ptr [ebp - 0x1c], 0xffffffff
            //   49                   | dec                 ecx
            //   c745e8ff000000       | mov                 dword ptr [ebp - 0x18], 0xff
            //   8b3c857c300010       | mov                 edi, dword ptr [eax*4 + 0x1000307c]

        $sequence_10 = { 8b46f8 8b04855c300010 c1e002 50 6a40 }
            // n = 5, score = 100
            //   8b46f8               | mov                 eax, dword ptr [esi - 8]
            //   8b04855c300010       | mov                 eax, dword ptr [eax*4 + 0x1000305c]
            //   c1e002               | shl                 eax, 2
            //   50                   | push                eax
            //   6a40                 | push                0x40

        $sequence_11 = { a2???????? eb07 c605????????00 c705????????4c400010 ff7508 }
            // n = 5, score = 100
            //   a2????????           |                     
            //   eb07                 | jmp                 9
            //   c605????????00       |                     
            //   c705????????4c400010     |     
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_12 = { 0f8781000000 ff248dfb240010 881f eb76 }
            // n = 4, score = 100
            //   0f8781000000         | ja                  0x87
            //   ff248dfb240010       | jmp                 dword ptr [ecx*4 + 0x100024fb]
            //   881f                 | mov                 byte ptr [edi], bl
            //   eb76                 | jmp                 0x78

        $sequence_13 = { 895df4 8d41de 33db 83f855 0f872affffff 0fb6805a210010 }
            // n = 6, score = 100
            //   895df4               | mov                 dword ptr [ebp - 0xc], ebx
            //   8d41de               | lea                 eax, [ecx - 0x22]
            //   33db                 | xor                 ebx, ebx
            //   83f855               | cmp                 eax, 0x55
            //   0f872affffff         | ja                  0xffffff30
            //   0fb6805a210010       | movzx               eax, byte ptr [eax + 0x1000215a]

        $sequence_14 = { 8b06 83661c00 83f807 0f87c7000000 ff24857e230010 }
            // n = 5, score = 100
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   83661c00             | and                 dword ptr [esi + 0x1c], 0
            //   83f807               | cmp                 eax, 7
            //   0f87c7000000         | ja                  0xcd
            //   ff24857e230010       | jmp                 dword ptr [eax*4 + 0x1000237e]

        $sequence_15 = { 894dfc eb0e 8b14957c300010 49 }
            // n = 4, score = 100
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   eb0e                 | jmp                 0x10
            //   8b14957c300010       | mov                 edx, dword ptr [edx*4 + 0x1000307c]
            //   49                   | dec                 ecx

    condition:
        7 of them and filesize < 57344
}
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