What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Spectating the Worm:Win32/Slenfbot!D detection name usually means that your computer is in big danger. This malware can correctly be named as ransomware – type of malware which encrypts your files and forces you to pay for their decryption. Deleteing it requires some specific steps that must be done as soon as possible.
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Worm:Win32/Slenfbot!D detection is a malware detection you can spectate in your computer. It often appears after the preliminary procedures on your computer – opening the untrustworthy e-mail messages, clicking the advertisement in the Internet or installing the program from untrustworthy resources. From the second it appears, you have a short time to do something about it before it starts its malicious activity. And be sure – it is better not to await these harmful actions.

What is Worm:Win32/Slenfbot!D virus?

Worm:Win32/Slenfbot!D is ransomware-type malware. It searches for the files on your disk drive, encrypts it, and after that asks you to pay the ransom for receiving the decryption key. Besides making your documents inaccessible, this malware additionally does a lot of damage to your system. It modifies the networking setups in order to avoid you from reading the elimination guides or downloading the anti-malware program. In some cases, Worm:Win32/Slenfbot!D can also stop the launching of anti-malware programs.

Worm:Win32/Slenfbot!D Summary

Summarizingly, Worm:Win32/Slenfbot!D virus actions in the infected system are next:

  • Behavioural detection: Executable code extraction – unpacking;
  • SetUnhandledExceptionFilter detected (possible anti-debug);
  • 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;
  • Anomalous file deletion behavior detected (10+);
  • A process attempted to delay the analysis task.;
  • Dynamic (imported) function loading detected;
  • Enumerates running processes;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • A process created a hidden window;
  • CAPE extracted potentially suspicious content;
  • Unconventionial language used in binary resources: Russian;
  • Authenticode signature is invalid;
  • Deletes its original binary from disk;
  • Checks for the presence of known windows from debuggers and forensic tools;
  • Likely virus infection of existing system binary;
  • Attempts to identify installed analysis tools by a known file location;
  • Checks the presence of disk drives in the registry, possibly for anti-virtualization;
  • Creates a copy of itself;
  • Ciphering the documents kept on the target’s disks — so the victim cannot use these files;
  • Blocking the launching of .exe files of security tools
  • Blocking the launching of installation files of security tools

Ransomware has actually been a major problem for the last 4 years. It is hard to imagine a more dangerous malware for both individual users and organizations. The algorithms utilized in Worm:Win32/Slenfbot!D (generally, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need to have more time than our galaxy already exists, and possibly will exist. But that virus does not do all these terrible things instantly – it may take up to a few hours to cipher all of your documents. Therefore, seeing the Worm:Win32/Slenfbot!D detection is a clear signal that you need to start the elimination process.

Where did I get the Worm:Win32/Slenfbot!D?

Common ways of Worm:Win32/Slenfbot!D injection are basic for all other ransomware variants. Those are one-day landing sites where users are offered to download the free software, so-called bait emails and hacktools. Bait e-mails are a pretty new method in malware spreading – you receive the email that imitates some regular notifications about deliveries or bank service conditions updates. Inside of the email, there is a malicious 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 uncomplicated, but still requires tons of awareness. Malware can hide in various places, and it is much better to prevent it even before it goes into your system than to rely on an anti-malware program. Standard cybersecurity knowledge is just an essential item in the modern-day world, even if your interaction with a computer stays on YouTube videos. That may keep you a great deal of time and money which you would certainly spend while trying to find a fixing guide.

Worm:Win32/Slenfbot!D malware technical details

File Info:

name: 6A56319D9BD5489E5B82.mlw
path: /opt/CAPEv2/storage/binaries/ed211b05803b2c36fbdfb86d500a4afc8dbe4bec819d3e61dff324216a8409f0
crc32: ECE6F2AB
md5: 6a56319d9bd5489e5b82370834283d61
sha1: 178358f8ecc12678295970497d69f3c9fda06a67
sha256: ed211b05803b2c36fbdfb86d500a4afc8dbe4bec819d3e61dff324216a8409f0
sha512: a8ae9bf3719d475b338b88b96c48475e5c7433c8db294f2a442f76dd3c91482ecbb41d1c878aae8e937999ab7507bfc034bf4f6cbdf539467352e661f40a05fb
ssdeep: 6144:wFSLWPQDdc8idypFkZwSSGiGEMPZGWBX69H5B08V1t:wyL+/BGWh69Hr
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1174412257AF0C261C0E14136B5E9E45A712DB90C5FC8586FB38027D9B4316EC75EBA2F
sha3_384: 55a6724bceaa68aabd58d9914ee7dce18c63ed4afd1f515e1eb19cda899028bdbe424b532f5cf9bc586ef15485cef8c6
ep_bytes: 90558bec81c47cfdffff4f46b8712540
timestamp: 2009-01-02 03:45:48

Version Info:

CompanyName: Eper1 Software
FileDescription: Eper1 Internet Browser
FileVersion: 1190
InternalName: Eper1
LegalCopyright: Copyright © Eper1 Software 1995-2011
OriginalFilename: Eper1.exe
ProductName: Eper1 Internet Browser
ProductVersion: 11.01
Translation: 0x0409 0x04b0

Worm:Win32/Slenfbot!D also known as:

Elasticmalicious (high confidence)
VIPREVirTool.Win32.Obfuscator.da!j (v)
CrowdStrikewin/malicious_confidence_100% (W)
K7GWTrojan ( 0021925d1 )
K7AntiVirusTrojan ( 0021925d1 )
ESET-NOD32a variant of Win32/Kryptik.KWA
AvastWin32:Kryptik-AHL [Trj]
CynetMalicious (score: 100)
EmsisoftGen:Variant.Vundo.3 (B)
SophosML/PE-A + Mal/FakeAV-BW
MAXmalware (ai score=100)
RisingExploit.ShellCode!8.2A (CLOUD)
SentinelOneStatic AI – Malicious PE
AVGWin32:Kryptik-AHL [Trj]

How to remove Worm:Win32/Slenfbot!D?

Worm:Win32/Slenfbot!D malware is incredibly difficult to remove manually. It stores its files in multiple locations throughout the disk, and can get back itself from one of the elements. Moreover, numerous modifications in the registry, networking configurations and Group Policies are really hard to find and revert to the initial. It is far better to make use of a specific app – exactly, an anti-malware app. GridinSoft Anti-Malware will fit the most ideal for malware elimination purposes.

Why GridinSoft Anti-Malware? It is really light-weight and has its detection databases updated practically every hour. Additionally, it does not have such bugs and weakness as Microsoft Defender does. The combination of these details makes GridinSoft Anti-Malware suitable for taking out 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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