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 (20220411 | Detects win.qtbot.)
rule win_qtbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.qtbot."
        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.qtbot"
        malpedia_rule_date = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 8bec 8b5508 33c0 53 8a1a 6bc80d 0fb6c3 }
            // n = 7, score = 200
            //   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
            //   0fb6c3               | movzx               eax, bl

        $sequence_1 = { 8b4510 89450c 8d4301 0fb6d8 8a941dfcfeffff 0fb6c2 03c6 }
            // n = 7, score = 200
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax
            //   8d4301               | lea                 eax, dword ptr [ebx + 1]
            //   0fb6d8               | movzx               ebx, al
            //   8a941dfcfeffff       | mov                 dl, byte ptr [ebp + ebx - 0x104]
            //   0fb6c2               | movzx               eax, dl
            //   03c6                 | add                 eax, esi

        $sequence_2 = { 742a 8b049a 03c6 50 e8???????? 3b4508 }
            // n = 6, score = 200
            //   742a                 | je                  0x2c
            //   8b049a               | mov                 eax, dword ptr [edx + ebx*4]
            //   03c6                 | add                 eax, esi
            //   50                   | push                eax
            //   e8????????           |                     
            //   3b4508               | cmp                 eax, dword ptr [ebp + 8]

        $sequence_3 = { 0fb6c2 03c8 8b450c 0fb6c9 8a8c0dfcfeffff 3008 }
            // n = 6, 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]
            //   3008                 | xor                 byte ptr [eax], cl

        $sequence_4 = { 83c0d0 03c1 25ffffff00 42 }
            // n = 4, score = 200
            //   83c0d0               | add                 eax, -0x30
            //   03c1                 | add                 eax, ecx
            //   25ffffff00           | and                 eax, 0xffffff
            //   42                   | inc                 edx

        $sequence_5 = { 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_6 = { 8b400c 8b7014 ad 8b00 8b4010 }
            // n = 5, score = 200
            //   8b400c               | mov                 eax, dword ptr [eax + 0xc]
            //   8b7014               | mov                 esi, dword ptr [eax + 0x14]
            //   ad                   | lodsd               eax, dword ptr [esi]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8b4010               | mov                 eax, dword ptr [eax + 0x10]

        $sequence_7 = { 40 89450c 83ef01 75b1 8b4510 5f }
            // n = 6, 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]
            //   5f                   | pop                 edi

        $sequence_8 = { ff2485f6200010 8b8614080000 3b45f4 7e03 8945f4 8365fc00 8365f000 }
            // n = 7, score = 100
            //   ff2485f6200010       | jmp                 dword ptr [eax*4 + 0x100020f6]
            //   8b8614080000         | mov                 eax, dword ptr [esi + 0x814]
            //   3b45f4               | cmp                 eax, dword ptr [ebp - 0xc]
            //   7e03                 | jle                 5
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   8365f000             | and                 dword ptr [ebp - 0x10], 0

        $sequence_9 = { 83f855 0f872affffff 0fb6805a210010 ff2485f6200010 8b8614080000 }
            // n = 5, score = 100
            //   83f855               | cmp                 eax, 0x55
            //   0f872affffff         | ja                  0xffffff30
            //   0fb6805a210010       | movzx               eax, byte ptr [eax + 0x1000215a]
            //   ff2485f6200010       | jmp                 dword ptr [eax*4 + 0x100020f6]
            //   8b8614080000         | mov                 eax, dword ptr [esi + 0x814]

        $sequence_10 = { 8b7df4 8b0c855c300010 c1e705 33d2 }
            // n = 4, score = 100
            //   8b7df4               | mov                 edi, dword ptr [ebp - 0xc]
            //   8b0c855c300010       | mov                 ecx, dword ptr [eax*4 + 0x1000305c]
            //   c1e705               | shl                 edi, 5
            //   33d2                 | xor                 edx, edx

        $sequence_11 = { 8b14957c300010 49 0fafd1 0155fc 46 83c020 }
            // n = 6, score = 100
            //   8b14957c300010       | mov                 edx, dword ptr [edx*4 + 0x1000307c]
            //   49                   | dec                 ecx
            //   0fafd1               | imul                edx, ecx
            //   0155fc               | add                 dword ptr [ebp - 4], edx
            //   46                   | inc                 esi
            //   83c020               | add                 eax, 0x20

        $sequence_12 = { 6a07 e9???????? 33c0 8b7df4 8b0c855c300010 }
            // n = 5, score = 100
            //   6a07                 | push                7
            //   e9????????           |                     
            //   33c0                 | xor                 eax, eax
            //   8b7df4               | mov                 edi, dword ptr [ebp - 0xc]
            //   8b0c855c300010       | mov                 ecx, dword ptr [eax*4 + 0x1000305c]

        $sequence_13 = { 837efcff 7518 8b46f8 8b04855c300010 c1e002 50 6a40 }
            // n = 7, score = 100
            //   837efcff             | cmp                 dword ptr [esi - 4], -1
            //   7518                 | jne                 0x1a
            //   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_14 = { 0f8781000000 ff248dfb240010 881f eb76 ff30 eb63 }
            // n = 6, score = 100
            //   0f8781000000         | ja                  0x87
            //   ff248dfb240010       | jmp                 dword ptr [ecx*4 + 0x100024fb]
            //   881f                 | mov                 byte ptr [edi], bl
            //   eb76                 | jmp                 0x78
            //   ff30                 | push                dword ptr [eax]
            //   eb63                 | jmp                 0x65

        $sequence_15 = { 8b06 83661c00 83f807 0f87c7000000 ff24857e230010 832700 e9???????? }
            // n = 7, 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]
            //   832700               | and                 dword ptr [edi], 0
            //   e9????????           |                     

    condition:
        7 of them and filesize < 57344
}
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