Threat Database Worms Worm.Cridex.B

Worm.Cridex.B

By CagedTech in Worms
Published:
Last updated:

Threat Scorecard

Threat Level: 50 % (Medium)
Infected Computers: 1,468
First Seen: November 4, 2011
Last Seen: June 6, 2026
OS(es) Affected: Windows

The detection of Worm.Cridex.B on your system indicates a potential security threat that requires immediate attention. This malware is designed to replicate itself and spread to other computers, potentially causing harm to your data and system performance. It is essential to understand the nature of this threat and take prompt action to remove it and prevent future infections.

What Is Worm.Cridex.B?

Worm.Cridex.B is a type of malware that can infect computers without the need for user interaction. Its primary goal is to spread to other systems, often through exploited vulnerabilities or by attaching itself to other programs. The name "Worm.Cridex.B" suggests that it is a variant of a known malware, but the specifics of its operation and impact can vary. Understanding that malware can evolve and change, it's crucial to focus on general removal and prevention strategies rather than specific details that might quickly become outdated.

How Worm.Cridex.B Operates

Malware like Worm.Cridex.B typically operates by exploiting system vulnerabilities to gain access to a computer. Once inside, it can start replicating itself, spreading to other parts of the system, and potentially to other computers through network connections. It may also download additional malicious components or create backdoors for remote access. The exact mechanisms can vary, but the overall goal is often to compromise system security for malicious purposes, such as data theft or using the infected computer as part of a botnet for distributed attacks.

Symptoms of Infection

Symptoms of a Worm.Cridex.B infection can be subtle at first but may become more pronounced as the malware spreads and compromises system resources. Common signs include slow system performance, unexpected crashes, and unusual network activity. You might also notice unfamiliar programs or processes running in the background, and in some cases, files may be modified or deleted without your knowledge. Since malware can hide its activities, some infections might not display obvious symptoms, making regular system checks and antivirus scans crucial for early detection.

How to Remove Worm.Cridex.B

  1. Enter Safe Mode with Networking to limit the malware's ability to spread or interfere with the removal process. This mode allows you to use the internet to download necessary tools while minimizing system activity.
  2. Perform a full scan of your system using a reputable antivirus tool, such as SpyHunter. Ensure your antivirus software is updated to the latest version to increase the chances of detecting and removing the malware effectively.
  3. Uninstall suspicious programs that you do not recognize or that were installed around the time the malware was detected. Be cautious and only remove programs you are sure are not needed or are known to be malicious.
  4. Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings. This can help remove any malicious extensions or settings changes made by the malware.
  5. After completing the above steps, reboot your computer and perform another full scan to ensure the malware has been completely removed. Repeat the scanning process until no threats are detected to confirm the removal was successful.

Conclusion

Removing Worm.Cridex.B requires a systematic approach to ensure all components of the malware are eliminated from your system. By following the steps outlined above and maintaining good computer hygiene, such as regularly updating your operating system and antivirus software, avoiding suspicious downloads, and being cautious with email attachments, you can significantly reduce the risk of future infections. Remember, prevention and early detection are key to protecting your digital assets and maintaining system security.

Aliases

15 security vendors flagged this file as malicious.

Antivirus Vendor Detection
AVG SHeur4.SJJ
Fortinet W32/Yakes.B!tr
Antiy-AVL Trojan/Win32.Dapato.gen
Sophos Troj/Zbot-BNJ
AntiVir Worm/Cridex.B.79
BitDefender Trojan.Generic.KD.547797
Kaspersky Trojan-Dropper.Win32.Dapato.aeuk
McAfee Generic.bfr!ek
CAT-QuickHeal Worm.Cridex
Panda Trj/Genetic.gen
AVG Dropper.Generic7.CLFO
Fortinet W32/Injector.ZVR!tr
AhnLab-V3 Trojan/Win32.Zbot
AntiVir TR/Agent.135168.156
Kaspersky Trojan-Dropper.Win32.Dapato.cbzv

File System Details

Worm.Cridex.B may create the following file(s):
# File Name MD5 Detections
1. syitm.exe 291a7a563820f3a52c35bb1bc5a69f6f 25
2. lmsxqcbysw.exe ddbcb37b750a7558bcc88118f0d96ee9 15
3. Protection.exe ee5f80e4d3a4b14a72255b4b875f547f 11
4. jodrive32.exe 104f8c14a26836fdb665dbe89ec6c578 7
5. DTite.exe 6f12c5a35a6934cae04509b5ef544551 6
6. Boonty.exe f5539e7e4a4bfe6946a2e133ff593b71 5
7. KB00033595.exe 417841bff309c1261eb0e42d80ead7ad 5
8. RegFast.exe 4ff7e022f86ac6dc20ed2f7779b1582e 4
9. csrss.exe 8740a9dfed239ddd4a11de5b99b44e1b 4
10. snpr.exe 8e5b78bfe0013a8717b550e1b4509a3e 3
11. KB724257.exe bc7d442906437eebebb6a21e20a35dd1 3
12. KB00706635.exe 7a8a7250e99f2856ff1b2792e5c391ee 2
13. KB00300586.exe d3ccd99936bd4a904ca0e2e2a50936fd 2
14. Qtasai.scr e80ae6ff28ef78cfb12a927a86517677 2
15. KB00765271.exe 28b6eabdde29421eb00f07119e803e39 2
16. KB00450223.exe ef0e291414e6e8848985f14c3c1d056c 2
17. 74472b74.dll 25976c7732707537f5fd5c20540dba73 1
18. KB00012088.exe 5c2db9405e1828a5909d7b7dacc5c2fd 1
19. KB00256353.exe 8c23e55f7b0ca489bb4b05f9c6721761 1
20. KB00818303.exe 98f669d6e8a0b92401dc6bd6ed1291d4 1
21. KB00574440.exe 783be0270efa0235b19b4e7182ece043 1
22. KB00009976.exe 9df3e9fb927c7d846ca1337758ef5d60 1
23. KB00158076.exe 947a37cab6737c1a506b6098db864f31 1
24. kb00737510.exe 51be3218c2c6df6600bb2127402f9f11 1
25. KB00866601.exe e0e2888476ee55cab70f43d57fd4e949 1
26. __kb00066679.exe 038be3d87c1bb305f6bb2706d7718b6f 1
27. KB00144083.exe acdd4c2a377933d89139b5ee6eefc464 1