What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Seeing the Win32/Zoltbot.B malware detection usually means that your PC is in big danger. This computer virus can correctly be identified as ransomware – type of malware which encrypts your files and asks you to pay for their decryption. Stopping it requires some specific steps that must be done as soon as possible.
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Win32/Zoltbot.B detection is a virus detection you can spectate in your computer. It generally appears after the preliminary activities on your computer – opening the untrustworthy email messages, clicking the advertisement in the Web or setting up the program from unreliable resources. From the instance it shows up, you have a short time to take action before it starts its destructive activity. And be sure – it is much better not to wait for these malicious actions.

What is Win32/Zoltbot.B virus?

Win32/Zoltbot.B 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 documents inaccessible, this virus also does a lot of damage to your system. It changes the networking setups in order to stop you from reading the removal guides or downloading the anti-malware program. In some cases, Win32/Zoltbot.B can additionally prevent the setup of anti-malware programs.

Win32/Zoltbot.B Summary

In summary, Win32/Zoltbot.B malware actions in the infected computer are next:

  • Performs HTTP requests potentially not found in PCAP.;
  • Drops a binary and executes it;
  • Authenticode signature is invalid;
  • Attempts to modify proxy settings;
  • Creates a copy of itself;
  • Anomalous binary characteristics;
  • Yara rule detections observed from a process memory dump/dropped files/CAPE;
  • Ciphering the documents kept on the target’s disk drives — so the victim cannot open these files;
  • Blocking the launching of .exe files of security tools
  • Blocking the launching of installation files of anti-virus programs

Ransomware has actually been a headache for the last 4 years. It is challenging to imagine a more damaging malware for both individual users and businesses. The algorithms used in Win32/Zoltbot.B (usually, 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. However, that malware does not do all these horrible things instantly – it can require up to several hours to cipher all of your documents. Hence, seeing the Win32/Zoltbot.B detection is a clear signal that you should start the elimination process.

Where did I get the Win32/Zoltbot.B?

Standard ways of Win32/Zoltbot.B injection are basic for all other ransomware examples. Those are one-day landing web pages where victims are offered to download the free program, so-called bait e-mails and hacktools. Bait e-mails are a relatively new strategy in malware spreading – you receive the email that imitates some standard notifications about shippings or bank service conditions shifts. Inside of the email, there is an infected MS Office file, or a web link which leads to the exploit landing site.

Malicious email spam

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

Avoiding it looks fairly simple, but still needs tons of attention. Malware can hide in various spots, and it is far better to prevent it even before it gets into your system than to rely upon an anti-malware program. Simple cybersecurity knowledge is just an important thing in the modern world, even if your interaction with a PC stays on YouTube videos. That can save you a lot of money and time which you would certainly spend while searching for a fixing guide.

Win32/Zoltbot.B malware technical details

File Info:

name: B43C9C51E1CD35BFC6EB.mlw
path: /opt/CAPEv2/storage/binaries/e040ae70fbb842f5fbd4fad618c5519c6327b7538e25439846dc7ede487968d5
crc32: D69C8005
md5: b43c9c51e1cd35bfc6eb2897cf08680d
sha1: 4f06084a6f07718f7f48cb6a9360f99c9da0a05e
sha256: e040ae70fbb842f5fbd4fad618c5519c6327b7538e25439846dc7ede487968d5
sha512: a0790e2f70cc3692e5b435b766e6704d451a303e2313068d6473579d70eb8585ba1916f647b3bc0e355dc53f623fcbb51d97c1fa3592d5a693241e0f75c0e006
ssdeep: 768:5pHynLwYrdMcp/+ZO7vAbljCVop4511oPhGzbm:5ywYo0ujCVzWGPm
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1EE55C442660441D7D45238BE82269B6ADDBBECF3230041FBDB91BDB9AE7C9E4543D10E
sha3_384: 5cbef7003d5ac694f3c4276e8e827470deba10cc88a2528e20b7d1dea4f394a2421932fd78a250ccac9d535113881b0c
ep_bytes: 558bec83ec086a00ff152c700101a348
timestamp: 2011-09-03 17:46:10

Version Info:

0: [No Data]

Win32/Zoltbot.B also known as:

Elasticmalicious (high confidence)
ESET-NOD32a variant of Win32/Zoltbot.B
RisingTrojan.Malagent!8.53C (TFE:2:fM8ypo2OwgS)
EmsisoftGen:Trojan.ExplorerHijack.trW@a0J5ydk (B)
SentinelOneStatic AI – Suspicious PE
CynetMalicious (score: 100)
MAXmalware (ai score=80)
CrowdStrikewin/malicious_confidence_100% (W)

How to remove Win32/Zoltbot.B?

Win32/Zoltbot.B malware is extremely difficult to delete manually. It places its files in multiple locations throughout the disk, and can restore itself from one of the elements. Furthermore, various alterations in the windows registry, networking setups and Group Policies are really hard to identify and return to the original. It is better to use a special app – exactly, an anti-malware app. GridinSoft Anti-Malware will definitely fit the best for malware elimination goals.

Why GridinSoft Anti-Malware? It is really lightweight and has its databases updated almost every hour. Furthermore, it does not have such bugs and exploits as Microsoft Defender does. The combination of these aspects makes GridinSoft Anti-Malware suitable for removing malware of any form.

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

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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