Categories: Trojan

MSIL/TrojanDropper.Small.AQ removal instruction

The MSIL/TrojanDropper.Small.AQ is considered dangerous by lots of security experts. When this infection is active, you may notice unwanted processes in Task Manager list. In this case, it is adviced to scan your computer with GridinSoft Anti-Malware.

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What MSIL/TrojanDropper.Small.AQ virus can do?

  • Yara rule detections observed from a process memory dump/dropped files/CAPE
  • Reads data out of its own binary image
  • CAPE extracted potentially suspicious content
  • Drops a binary and executes it
  • The binary likely contains encrypted or compressed data.
  • Authenticode signature is invalid
  • Anomalous .NET characteristics
  • Uses Windows utilities for basic functionality
  • CAPE detected the njRat malware family
  • Creates known Njrat/Bladabindi RAT registry keys

How to determine MSIL/TrojanDropper.Small.AQ?


File Info:

name: CBFEFAF61FA65B36A017.mlwpath: /opt/CAPEv2/storage/binaries/fa169e3dac93d494cbef35933066435d56048e9e5d6c2f41f8d473eb45983cb8crc32: 839E735Fmd5: cbfefaf61fa65b36a0176bba4c41a3a2sha1: 0bcedd8cf6061b467a1267cea927a220e4f6f549sha256: fa169e3dac93d494cbef35933066435d56048e9e5d6c2f41f8d473eb45983cb8sha512: c313501b5dc5801435f44f1ac8c416d066fa713e51beb94ee498cef32e37d3464ccc55c2c81673b97e12fd11e119eab76387f5ccf49be2dc29a3a7bdd97335fdssdeep: 768:8Com2TeCfVt3rXzv2+VnZ3Ce1kP/Rqq+9l6P:9om2SS33v2GZ3CwAqz9l6Ptype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T11C13D032A7D6052BDAEA06374FC2274B9B68B614866F0F5F04C2107E5AAA14437E076Bsha3_384: cd473c41c0dd292a2aa67d376320c29a3f715dc26320ff823c1750d86d0f51f04e52d7a6b244ee2ed39030e26a697e8cep_bytes: ff250020400000000000000000000000timestamp: 2014-12-25 00:44:43

Version Info:

Translation: 0x0000 0x04b0FileDescription: FileVersion: 0.0.0.0InternalName: 0.exeLegalCopyright: OriginalFilename: 0.exeProductVersion: 0.0.0.0Assembly Version: 0.0.0.0

MSIL/TrojanDropper.Small.AQ also known as:

Bkav W32.AIDetectNet.01
Lionic Trojan.Win32.Generic.m48a
MicroWorld-eScan Gen:Variant.MSILKrypt.6
ALYac Gen:Variant.MSILKrypt.6
Cylance Unsafe
VIPRE Gen:Variant.MSILKrypt.6
Sangfor Suspicious.Win32.Save.a
K7AntiVirus Trojan ( 700000121 )
K7GW Trojan ( 700000121 )
CrowdStrike win/malicious_confidence_100% (W)
Cyren W32/Kazy.DD.gen!Eldorado
Symantec ML.Attribute.HighConfidence
Elastic malicious (high confidence)
ESET-NOD32 a variant of MSIL/TrojanDropper.Small.AQ
APEX Malicious
Kaspersky Trojan-Dropper.MSIL.Small.b
BitDefender Gen:Variant.MSILKrypt.6
NANO-Antivirus Trojan.Win32.Drop.dmdsep
Avast Win32:RATX-gen [Trj]
Ad-Aware Gen:Variant.MSILKrypt.6
Sophos ML/PE-A
DrWeb Trojan.DownLoader9.34179
Zillya Dropper.Small.Win32.14617
McAfee-GW-Edition BehavesLike.Win32.Generic.pm
Trapmine malicious.high.ml.score
FireEye Generic.mg.cbfefaf61fa65b36
Emsisoft Gen:Variant.MSILKrypt.6 (B)
Ikarus Trojan-Dropper.MSIL.Small
GData Gen:Variant.MSILKrypt.6
Jiangmin TrojanDropper.FrauDrop.tov
Google Detected
Avira TR/Dropper.Gen
Antiy-AVL Trojan/Generic.ASBOL.29DC
Microsoft Backdoor:MSIL/Bladabindi
Cynet Malicious (score: 100)
Acronis suspicious
McAfee GenericRXCX-DN!CBFEFAF61FA6
MAX malware (ai score=84)
Malwarebytes MachineLearning/Anomalous.100%
Rising Trojan.Generic/MSIL@AI.100 (RDM.MSIL:wawaAI2kvmtqHGSGkokwww)
Yandex Trojan.DR.FrauDrop!VWZUlW1YdIM
SentinelOne Static AI – Malicious PE
MaxSecure Trojan.Malware.300983.susgen
Fortinet MSIL/Dropper.VS!tr
BitDefenderTheta Gen:NN.ZemsilF.34698.cm0@aWmAgRc
AVG Win32:RATX-gen [Trj]
Cybereason malicious.61fa65
Panda Generic Malware

How to remove MSIL/TrojanDropper.Small.AQ?

  • Download and install GridinSoft Anti-Malware.
  • Open GridinSoft Anti-Malware and perform a “Standard scan“.
  • Move to quarantine” all items.
  • Open “Tools” tab – Press “Reset Browser Settings“.
  • Select proper browser and options – Click “Reset”.
  • Restart your computer.
Paul Valéry

I'm a cyber security analyst and data science expert with 5+ years of experience with security software contractors.

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