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 (20200529 | autogenerated rule brought to you by yara-signator)
rule win_qtbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.qtbot"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        malpedia_license = "CC BY-NC-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 = { 8a8c0dfcfeffff 3008 40 89450c }
            // n = 4, score = 200
            //   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_1 = { 85c0 742a 8b049a 03c6 }
            // n = 4, score = 200
            //   85c0                 | test                eax, eax
            //   742a                 | je                  0x2c
            //   8b049a               | mov                 eax, dword ptr [edx + ebx*4]
            //   03c6                 | add                 eax, esi

        $sequence_2 = { 0fb6c2 03c8 8b450c 0fb6c9 8a8c0dfcfeffff }
            // n = 5, score = 200
            //   0fb6c2               | movzx               eax, dl
            //   03c8                 | add                 ecx, eax
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   0fb6c9               | movzx               ecx, cl
            //   8a8c0dfcfeffff       | mov                 cl, byte ptr [ebp + ecx - 0x104]

        $sequence_3 = { 55 8bec 8b5508 33c0 53 8a1a 6bc80d }
            // n = 7, score = 200
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   33c0                 | xor                 eax, eax
            //   53                   | push                ebx
            //   8a1a                 | mov                 bl, byte ptr [edx]
            //   6bc80d               | imul                ecx, eax, 0xd

        $sequence_4 = { 8b049a 03c6 50 e8???????? 3b4508 }
            // n = 5, score = 200
            //   8b049a               | mov                 eax, dword ptr [edx + ebx*4]
            //   03c6                 | add                 eax, esi
            //   50                   | push                eax
            //   e8????????           |                     
            //   3b4508               | cmp                 eax, dword ptr [ebp + 8]

        $sequence_5 = { 7455 8b4510 89450c 8d4301 0fb6d8 8a941dfcfeffff 0fb6c2 }
            // n = 7, score = 200
            //   7455                 | je                  0x57
            //   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 = { 03c1 25ffffff00 42 8a1a 84db }
            // n = 5, score = 200
            //   03c1                 | add                 eax, ecx
            //   25ffffff00           | and                 eax, 0xffffff
            //   42                   | inc                 edx
            //   8a1a                 | mov                 bl, byte ptr [edx]
            //   84db                 | test                bl, bl

        $sequence_7 = { 33f6 8bde 85ff 7455 8b4510 89450c }
            // n = 6, score = 200
            //   33f6                 | xor                 esi, esi
            //   8bde                 | mov                 ebx, esi
            //   85ff                 | test                edi, edi
            //   7455                 | je                  0x57
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax

        $sequence_8 = { 89461c 59 894500 e9???????? a1???????? }
            // n = 5, score = 100
            //   89461c               | mov                 dword ptr [esi + 0x1c], eax
            //   59                   | pop                 ecx
            //   894500               | mov                 dword ptr [ebp], eax
            //   e9????????           |                     
            //   a1????????           |                     

        $sequence_9 = { 7521 6a10 6a40 ff15???????? 50 89461c 57 }
            // n = 7, score = 100
            //   7521                 | jne                 0x23
            //   6a10                 | push                0x10
            //   6a40                 | push                0x40
            //   ff15????????         |                     
            //   50                   | push                eax
            //   89461c               | mov                 dword ptr [esi + 0x1c], eax
            //   57                   | push                edi

        $sequence_10 = { eb07 c605????????00 c705????????4c400010 ff7508 ff15???????? }
            // n = 5, score = 100
            //   eb07                 | jmp                 9
            //   c605????????00       |                     
            //   c705????????4c400010     |     
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     

        $sequence_11 = { 49 c745e8ff000000 8b3c857c300010 c745ecffff0000 0faff9 }
            // n = 5, score = 100
            //   49                   | dec                 ecx
            //   c745e8ff000000       | mov                 dword ptr [ebp - 0x18], 0xff
            //   8b3c857c300010       | mov                 edi, dword ptr [eax*4 + 0x1000307c]
            //   c745ecffff0000       | mov                 dword ptr [ebp - 0x14], 0xffff
            //   0faff9               | imul                edi, ecx

        $sequence_12 = { 897e1c 897d00 eb39 803b00 }
            // n = 4, score = 100
            //   897e1c               | mov                 dword ptr [esi + 0x1c], edi
            //   897d00               | mov                 dword ptr [ebp], edi
            //   eb39                 | jmp                 0x3b
            //   803b00               | cmp                 byte ptr [ebx], 0

        $sequence_13 = { ff15???????? 57 ff15???????? eb41 897e1c 897d00 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   57                   | push                edi
            //   ff15????????         |                     
            //   eb41                 | jmp                 0x43
            //   897e1c               | mov                 dword ptr [esi + 0x1c], edi
            //   897d00               | mov                 dword ptr [ebp], edi

        $sequence_14 = { 99 52 50 e8???????? 83c40c 53 }
            // n = 6, score = 100
            //   99                   | cdq                 
            //   52                   | push                edx
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   53                   | push                ebx

        $sequence_15 = { 8bf8 a1???????? 50 57 50 53 }
            // n = 6, score = 100
            //   8bf8                 | mov                 edi, eax
            //   a1????????           |                     
            //   50                   | push                eax
            //   57                   | push                edi
            //   50                   | push                eax
            //   53                   | push                ebx

    condition:
        7 of them and filesize < 57344
}
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