Trojan:MSIL/FormBook.ACA!MTB Virus Removal

Seeing the Trojan:MSIL/FormBook.ACA!MTB malware detection usually means that your PC is in big danger. This computer virus can correctly be identified as ransomware – type of malware which ciphers your files and forces you to pay for their decryption. Removing it requires some peculiar steps that must be done as soon as possible.

Trojan:MSIL/FormBook.ACA!MTB detection is a virus detection you can spectate in your system. It generally shows up after the provoking activities on your PC – opening the untrustworthy e-mail, clicking the banner in the Internet or installing the program from unreliable sources. From the second it appears, you have a short time to do something about it until it begins its malicious activity. And be sure – it is much better not to wait for these destructive things.

What is Trojan:MSIL/FormBook.ACA!MTB virus?

Trojan:MSIL/FormBook.ACA!MTB is ransomware-type malware. It searches for the documents on your disks, encrypts it, and after that asks you to pay the ransom for receiving the decryption key. Besides making your files inaccessible, this virus also does a ton of harm to your system. It alters the networking settings in order to prevent you from reading the removal articles or downloading the anti-malware program. In some cases, Trojan:MSIL/FormBook.ACA!MTB can additionally block the launching of anti-malware programs.

Trojan:MSIL/FormBook.ACA!MTB Summary

In total, Trojan:MSIL/FormBook.ACA!MTB virus activities in the infected system are next:

  • CAPE extracted potentially suspicious content;
  • The binary likely contains encrypted or compressed data.;
  • Authenticode signature is invalid;
  • Anomalous .NET characteristics;
  • Encrypting the files kept on the victim’s drives — so the victim cannot open these files;
  • Blocking the launching of .exe files of anti-virus apps
  • Blocking the launching of installation files of anti-virus apps

Ransomware has actually been a headache for the last 4 years. It is difficult to imagine a more dangerous malware for both individuals and companies. The algorithms used in Trojan:MSIL/FormBook.ACA!MTB (typically, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need to have a lot more time than our galaxy already exists, and possibly will exist. But that virus does not do all these horrible things without delay – it may take up to a few hours to cipher all of your documents. Thus, seeing the Trojan:MSIL/FormBook.ACA!MTB detection is a clear signal that you must start the clearing process.

Where did I get the Trojan:MSIL/FormBook.ACA!MTB?

General ways of Trojan:MSIL/FormBook.ACA!MTB injection are typical for all other ransomware examples. Those are one-day landing web pages where users are offered to download and install the free app, so-called bait e-mails and hacktools. Bait e-mails are a quite modern strategy in malware spreading – you get the e-mail that mimics some standard notifications about shippings or bank service conditions modifications. Inside of the email, there is a corrupted MS Office file, or a link which opens the exploit landing site.

Malicious email spam

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

Preventing it looks pretty easy, but still demands a lot of recognition. Malware can hide in different spots, and it is far better to stop it even before it gets into your computer than to trust in an anti-malware program. Essential cybersecurity knowledge is just an important thing in the modern-day world, even if your relationship with a PC stays on YouTube videos. That can keep you a lot of time and money which you would certainly spend while trying to find a fix guide.

Trojan:MSIL/FormBook.ACA!MTB malware technical details

File Info:

name: 21113FA0C8640C0CCAAA.mlwpath: /opt/CAPEv2/storage/binaries/3b7a97cc542f21664ff9c45645b7f0ad4cbdf8cdce0ab4be4973ffac60b68de8crc32: 76937828md5: 21113fa0c8640c0ccaaa06f9ba045133sha1: 802e1a2a2ae111113797027788d7c72d0744173esha256: 3b7a97cc542f21664ff9c45645b7f0ad4cbdf8cdce0ab4be4973ffac60b68de8sha512: 2f82b00ad9d63f2aad1327b7d412218e6524cc4cb6e1e19d5ce95d9019b254ca91141ac071e0b9978043c6d3faab5db100157d47113d4661139ae1d58dd3252cssdeep: 12288:ozBO5ZZC/W2n96vxzquj9e2s7rrX/QWGq/GKVwzpMC3RQ6jhiocFs:ozqTC/fgHFsXrX/Wq/jVwqC3yGitype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T111E401AC97A5C6A7C2A80BBD401661883F7444E3367AC63DDF97409EFB4BB080D956C7sha3_384: 6f680c0a91040231d24a57c78daccf1a0a4af642d9fa7f2e79ec6043eeeba7fea591590c4e050b320e47f896f10f79d0ep_bytes: ff250020400000000000000000000000timestamp: 2023-04-19 01:57:55

Version Info:

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

Trojan:MSIL/FormBook.ACA!MTB also known as:

Bkav W32.AIDetectMalware.CS
Lionic Trojan.Win32.Stealer.12!c
Elastic malicious (high confidence)
DrWeb Trojan.PackedNET.1965
MicroWorld-eScan Trojan.Ransom.Loki.BYX
FireEye Generic.mg.21113fa0c8640c0c
CAT-QuickHeal Trojan.GenericFC.S30154624
Skyhigh BehavesLike.Win32.Generic.jc
McAfee GenericRXVV-PO!21113FA0C864
Malwarebytes Injector.Trojan.MSIL.DDS
Zillya Trojan.Stealer.Win32.59390
Sangfor Suspicious.Win32.Save.a
K7AntiVirus Trojan ( 005a3d621 )
Alibaba TrojanPSW:MSIL/Stealer.8abcd6bb
K7GW Trojan ( 005a3d621 )
Cybereason malicious.a2ae11
Arcabit Trojan.Ransom.Loki.BYX
BitDefenderTheta Gen:NN.ZemsilF.36744.Rm0@aG3K@Ue
VirIT Trojan.Win32.MSIL_Heur.A
Symantec Scr.Malcode!gdn34
ESET-NOD32 a variant of MSIL/Injector.WFX
APEX Malicious
Cynet Malicious (score: 100)
Kaspersky HEUR:Trojan-PSW.MSIL.Stealer.gen
BitDefender Trojan.Ransom.Loki.BYX
Avast Win32:PWSX-gen [Trj]
Tencent Malware.Win32.Gencirc.13bfa526
Sophos Troj/Krypt-XE
F-Secure Trojan.TR/Dropper.MSIL.Gen
VIPRE Trojan.Ransom.Loki.BYX
Emsisoft Trojan.Ransom.Loki.BYX (B)
Ikarus Trojan-Spy.Agent
Google Detected
Avira TR/Dropper.MSIL.Gen
Antiy-AVL Trojan/MSIL.Injector
Microsoft Trojan:MSIL/FormBook.ACA!MTB
ZoneAlarm HEUR:Trojan-PSW.MSIL.Stealer.gen
GData Trojan.Ransom.Loki.BYX
Varist W32/MSIL_Agent.EUS.gen!Eldorado
AhnLab-V3 Trojan/Win.Injection.C5415069
ALYac Trojan.Ransom.Loki.BYX
MAX malware (ai score=87)
VBA32 TrojanLoader.MSIL.DaVinci.Heur
Cylance unsafe
Panda Trj/Chgt.AD
Rising Malware.Obfus/[email protected] (RDM.MSIL2:B2kcXRcMtz0b408FMxCSxA)
SentinelOne Static AI – Malicious PE
MaxSecure Trojan.Malware.74396735.susgen
Fortinet MSIL/Kryptik.AIRP!tr
AVG Win32:PWSX-gen [Trj]
DeepInstinct MALICIOUS
CrowdStrike win/malicious_confidence_100% (W)

How to remove Trojan:MSIL/FormBook.ACA!MTB?

About the author

Robert Bailey

Security engineer focused on malware behavior, removal workflows, and Windows hardening. Robert reviews threat articles for practical accuracy, checking detection names, symptoms, and cleanup steps before publication.

Leave a Comment