MSIL/Agent.EF

Written by Robert Bailey
Spectating the MSIL/Agent.EF malware detection usually means that your PC is in big danger. This virus can correctly be identified as ransomware – type of malware which ciphers your files and forces you to pay for their decryption. Deleteing it requires some unusual steps that must be done as soon as possible.
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MSIL/Agent.EF detection is a malware detection you can spectate in your computer. It usually shows up after the preliminary procedures on your PC – opening the untrustworthy email messages, clicking the advertisement in the Web or setting up the program from untrustworthy resources. From the instance it appears, you have a short time to do something about it until it starts its destructive action. And be sure – it is far better not to await these malicious things.

What is MSIL/Agent.EF virus?

MSIL/Agent.EF is ransomware-type malware. It searches for the documents on your disks, encrypts it, and then asks you to pay the ransom for receiving the decryption key. Besides making your files locked, this virus also does a lot of damage to your system. It changes the networking setups in order to avoid you from checking out the elimination articles or downloading the antivirus. In some cases, MSIL/Agent.EF can additionally stop the setup of anti-malware programs.

MSIL/Agent.EF Summary

Summarizingly, MSIL/Agent.EF ransomware actions in the infected PC are next:

  • SetUnhandledExceptionFilter detected (possible anti-debug);
  • At least one process apparently crashed during execution;
  • Yara rule detections observed from a process memory dump/dropped files/CAPE;
  • Creates RWX memory;
  • Possible date expiration check, exits too soon after checking local time;
  • Guard pages use detected – possible anti-debugging.;
  • Dynamic (imported) function loading detected;
  • Enumerates the modules from a process (may be used to locate base addresses in process injection);
  • CAPE extracted potentially suspicious content;
  • Authenticode signature is invalid;
  • Uses Windows utilities for basic functionality;
  • Behavioural detection: Injection (inter-process);
  • Installs itself for autorun at Windows startup;
  • Attempts to modify Explorer settings to prevent hidden files from being displayed;
  • Encrypting the documents located on the victim’s disks — so the victim cannot check these files;
  • Blocking the launching of .exe files of anti-virus programs
  • Blocking the launching of installation files of anti-malware programs

Ransomware has been a horror story for the last 4 years. It is hard to picture a more dangerous virus for both individuals and businesses. The algorithms utilized in MSIL/Agent.EF (typically, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need a lot more time than our galaxy currently exists, and possibly will exist. But that malware does not do all these bad things immediately – it can take up to several hours to cipher all of your documents. Thus, seeing the MSIL/Agent.EF detection is a clear signal that you have to start the elimination process.

Where did I get the MSIL/Agent.EF?

Routine ways of MSIL/Agent.EF spreading are common for all other ransomware examples. Those are one-day landing websites where users are offered to download and install the free app, so-called bait e-mails and hacktools. Bait e-mails are a pretty modern strategy in malware distribution – you get the email that simulates some standard notifications about deliveries or bank service conditions changes. Inside of the email, there is an infected MS Office file, or a web link which opens the exploit landing site.

Malicious email spam

Malicious email message. This one tricks you to open the phishing website.

Avoiding it looks quite simple, however, still demands a lot of awareness. Malware can hide in different places, and it is better to stop it even before it goes into your system than to rely upon an anti-malware program. Basic cybersecurity knowledge is just an important thing in the modern world, even if your interaction with a PC stays on YouTube videos. That may save you a great deal of time and money which you would certainly spend while looking for a solution.

MSIL/Agent.EF malware technical details

File Info:

name: C3586724A33E9A0353CB.mlw
path: /opt/CAPEv2/storage/binaries/b9b248c2610178e948d3ace3654ec8ffbfcb530f91d9819a4a8355c84b12812a
crc32: 7D50832A
md5: c3586724a33e9a0353cb1c5c5debf659
sha1: 6101fcc1aec4007d7522212e2b874976ea2b97b5
sha256: b9b248c2610178e948d3ace3654ec8ffbfcb530f91d9819a4a8355c84b12812a
sha512: 06b989d6948b5b3826ba2ecf423ec3d3171819bb1b2a874e3678860482921690b8f9c1955d155910dafbd10d1478d79501462a6f52c4bb0d3ca4ad35b1b25de0
ssdeep: 3072:5Qc01zAf6QGkBIO20ZvvVRDEbFUMqMNE:5QcygYkBIOFNbDEpUMv
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T122B37C11B7C84AE5D6EE07B85077072147B2FD7AA986D30E2EE871F99C733804152B6B
sha3_384: ecf62ee077da4be3a16cfb7d35f13b7de2f34fb237e13b86afd2b09cf39ba68330c059a22b0c675dca40f7a0878577c8
ep_bytes: ff250020400000000000000000000000
timestamp: 2012-06-02 12:12:48

Version Info:

CompanyName: Microsoft Corporation
FileDescription: Microsoft Security Client Policy Configuration Tool
FileVersion: 4.18.18362.1 (WinBuild.160101.0800)
InternalName: ConfigSecurityPolicy.exe
LegalCopyright: © Microsoft Corporation. All rights reserved.
OriginalFilename: ConfigSecurityPolicy.exe
ProductName: Microsoft® Windows® Operating System
ProductVersion: 4.18.18362.1
Translation: 0x0409 0x04b0

MSIL/Agent.EF also known as:

tehtrisGeneric.Malware
DrWebTrojan.MulDrop20.13470
MicroWorld-eScanTrojan.GenericKDZ.89286
FireEyeGeneric.mg.c3586724a33e9a03
McAfeeGenericRXTG-FA!C3586724A33E
CylanceUnsafe
K7AntiVirusTrojan ( 700000121 )
K7GWTrojan ( 700000121 )
Cybereasonmalicious.4a33e9
BitDefenderThetaGen:NN.ZemsilF.34742.gm0@ay2IuYai
CyrenW32/MSIL_Agent.DJX.gen!Eldorado
SymantecTrojan.Gen.MBT
Elasticmalicious (high confidence)
ESET-NOD32a variant of MSIL/Agent.EF
APEXMalicious
ClamAVWin.Virus.Renamer-9953540-0
KasperskyHEUR:Trojan-Ransom.Win32.Generic
BitDefenderTrojan.GenericKDZ.89286
AvastWin32:MalwareX-gen [Trj]
Ad-AwareTrojan.GenericKDZ.89286
EmsisoftTrojan.GenericKDZ.89286 (B)
McAfee-GW-EditionGenericRXTG-FA!C3586724A33E
Trapminemalicious.moderate.ml.score
SophosMSIL/Grenam-A
SentinelOneStatic AI – Suspicious PE
GDataTrojan.GenericKDZ.89286
AviraHEUR/AGEN.1235262
ArcabitIL:Trojan.MSILMamut.D112D
MicrosoftVirus:MSIL/Grenam.gen!A
CynetMalicious (score: 99)
VBA32TScope.Trojan.MSIL
ALYacIL:Trojan.MSILMamut.4397
MAXmalware (ai score=81)
MalwarebytesTrojan.Injector
RisingVirus.Grenam!1.A2DD (CLASSIC)
IkarusWorm.MSIL.Bladabindi
FortinetMSIL/Agent.EF!worm
AVGWin32:MalwareX-gen [Trj]
CrowdStrikewin/malicious_confidence_100% (W)

How to remove MSIL/Agent.EF?

MSIL/Agent.EF malware is incredibly hard to erase manually. It places its data in several locations throughout the disk, and can recover itself from one of the elements. Moreover, various changes in the windows registry, networking configurations and also Group Policies are quite hard to identify and change to the initial. It is much better to utilize a special app – exactly, an anti-malware tool. GridinSoft Anti-Malware will definitely fit the most ideal for virus removal purposes.

Why GridinSoft Anti-Malware? It is really light-weight and has its databases updated nearly every hour. In addition, it does not have such bugs and vulnerabilities as Microsoft Defender does. The combination of these facts makes GridinSoft Anti-Malware perfect for taking out malware of any kind.

Remove the viruses with GridinSoft Anti-Malware

  • Download and install GridinSoft Anti-Malware. After the installation, you will be offered to perform the Standard Scan. Approve this action.
  • Gridinsoft Anti-Malware during the scan process

  • Standard scan checks the logical disk where the system files are stored, together with the files of programs you have already installed. The scan lasts up to 6 minutes.
  • GridinSoft Anti-Malware scan results

  • When the scan is over, you may choose the action for each detected virus. For all files of [SHORT_NAME] the default option is “Delete”. Press “Apply” to finish the malware removal.
  • GridinSoft Anti-Malware - After Cleaning
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About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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