Categories: Malware

What is “MSIL/Packed.SmartAssembly.N suspicious”?

The MSIL/Packed.SmartAssembly.N suspicious 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/Packed.SmartAssembly.N suspicious virus can do?

  • SetUnhandledExceptionFilter detected (possible anti-debug)
  • Behavioural detection: Executable code extraction – unpacking
  • Yara rule detections observed from a process memory dump/dropped files/CAPE
  • Creates RWX memory
  • Guard pages use detected – possible anti-debugging.
  • Dynamic (imported) function loading detected
  • 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.
  • .NET file is packed/obfuscated with SmartAssembly
  • Authenticode signature is invalid
  • Uses Windows utilities for basic functionality
  • Behavioural detection: Injection (Process Hollowing)
  • Executed a process and injected code into it, probably while unpacking
  • Sniffs keystrokes
  • Behavioural detection: Injection (inter-process)
  • Created a process from a suspicious location
  • Installs itself for autorun at Windows startup
  • CAPE detected the njRat malware family
  • Creates a copy of itself
  • Creates known Njrat/Bladabindi RAT registry keys

How to determine MSIL/Packed.SmartAssembly.N suspicious?


File Info:

name: 8E02225F9C7ACFEF5058.mlwpath: /opt/CAPEv2/storage/binaries/ade422d18b6b9cf24000a8f2b57ad344e248abcfd1086b2dc600c7d8ffdc332dcrc32: 79302898md5: 8e02225f9c7acfef50589076585518a8sha1: b71a89f937042a941fe596c88ee008a2e79c9ca7sha256: ade422d18b6b9cf24000a8f2b57ad344e248abcfd1086b2dc600c7d8ffdc332dsha512: 7421da196f0cf65973743f7c0aef532133cf2de8dbb1f9434810a2750a543b69514c7499422cc19808b79b985cf510063ea10ef74f7be0634db0b6e9c814d167ssdeep: 6144:PopTOp+0JzeRbvikXAF3g/TTGLQrBWJPC:PoFOp+0IQ3gbSLa2Ctype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T16164DF173E41E2C2F76E8576488A91311653AC6AD947D62B32CCBF0F78FC7A1B5128B1sha3_384: 7a2851c0482e54586b59989b9188ded7f09d18ea1013e751cf31ea1bdc5c4af9b5d6bb76a22140f1d7ec437205236b06ep_bytes: ff250020400000000000000000000000timestamp: 2016-01-30 13:37:15

Version Info:

0: [No Data]

MSIL/Packed.SmartAssembly.N suspicious also known as:

Elastic malicious (high confidence)
DrWeb BackDoor.Bladabindi.13678
MicroWorld-eScan Gen:Variant.MSILPerseus.1044
FireEye Generic.mg.8e02225f9c7acfef
ALYac Gen:Variant.MSILPerseus.1044
Cylance Unsafe
Zillya Trojan.Disfa.Win32.50772
Sangfor Backdoor.Win32.Bladabindi.8
K7AntiVirus Trojan ( 0055e39a1 )
Alibaba Backdoor:MSIL/SmartAssembly.389d440f
K7GW Trojan ( 0055e39a1 )
Cybereason malicious.f9c7ac
BitDefenderTheta Gen:NN.ZemsilF.34294.tm0@aaBkYve
Cyren W32/Trojan.FDW.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Packed.SmartAssembly.N suspicious
APEX Malicious
Paloalto generic.ml
Kaspersky HEUR:Trojan.MSIL.Generic
BitDefender Gen:Variant.MSILPerseus.1044
NANO-Antivirus Trojan.Win32.Disfa.eakkaq
Avast MSIL:GenMalicious-L [Trj]
Ad-Aware Gen:Variant.MSILPerseus.1044
Sophos ML/PE-A + Mal/Behav-421
Comodo Malware@#3n64h7a0rhrsn
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Generic.fh
Emsisoft Gen:Variant.MSILPerseus.1044 (B)
Ikarus Trojan.MSIL.Injector
GData Gen:Variant.MSILPerseus.1044
Jiangmin Trojan.MSIL.alsb
MaxSecure Trojan.Malware.300983.susgen
Avira TR/Dropper.MSIL.Gen
MAX malware (ai score=82)
Antiy-AVL Trojan/Generic.ASMalwS.1730580
Kingsoft Win32.Troj.Disfa.is.(kcloud)
Microsoft Trojan:MSIL/Bladabindi
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Agent.C2412061
McAfee Artemis!8E02225F9C7A
VBA32 Trojan.MSIL.Disfa
Malwarebytes MachineLearning/Anomalous.97%
Tencent Msil.Trojan.Generic.Eaww
Yandex Trojan.Disfa!Bm8F91gO1S4
SentinelOne Static AI – Malicious PE
eGambit Unsafe.AI_Score_99%
Fortinet MSIL/Generic.AP.AE1B177!tr
Webroot W32.Malware.Gen
AVG MSIL:GenMalicious-L [Trj]
Panda Trj/GdSda.A
CrowdStrike win/malicious_confidence_100% (D)

How to remove MSIL/Packed.SmartAssembly.N suspicious?

  • 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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