Threat Database Trojans Trojan.Small

Trojan.Small

By CagedTech in Trojans
Published:
Last updated:

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 3,591
First Seen: July 24, 2009
Last Seen: June 29, 2026
OS(es) Affected: Windows

The detection of Trojan.Small on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to compromise the security of your computer, allowing unauthorized access and potentially leading to further malicious activities. It is essential to understand the nature of this threat and take prompt action to remove it and protect your system.

What Is Trojan.Small?

Trojan.Small is a type of Trojan horse malware, which is a broad category of malicious software that disguises itself as legitimate programs. Unlike viruses, Trojans do not replicate themselves but can cause significant harm by creating backdoors for remote access, stealing sensitive information, or downloading additional malware. The term "Trojan" originates from the legendary Trojan Horse, symbolizing how this malware infiltrates systems by pretending to be something it's not.

How Trojan.Small Operates

Trojan.Small, like other Trojans, operates by deceiving users into installing it on their systems. This can happen through various means, including opening malicious email attachments, downloading software from untrusted sources, or visiting compromised websites. Once installed, it can perform a variety of malicious activities, depending on its design. Common actions include data theft, such as logging keystrokes to capture passwords or credit card numbers, or using the infected computer as part of a botnet to conduct distributed denial-of-service (DDoS) attacks.

Symptoms of Infection

Identifying a Trojan infection can be challenging because it often does not display obvious symptoms. However, some signs may indicate its presence, such as unusual system behavior, including slow performance, frequent crashes, or unfamiliar programs appearing on your computer. Additionally, you might notice unexpected changes to your system settings or unusual network activity. Since Trojans can act as backdoors, allowing remote access to your system, any unauthorized access or changes should be investigated immediately.

  • Unexplained changes in system settings or files
  • Appearance of unfamiliar programs or icons
  • System crashes or instability
  • Unusual network activity

How to Remove Trojan.Small

  1. Enter Safe Mode with Networking to limit the malware's ability to interfere with the removal process. This mode starts Windows with minimal drivers and services, making it easier to remove malware.
  2. Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter. Ensure your antivirus software is up-to-date to increase the chances of detecting and removing the malware.
  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 certain are malicious or unnecessary.
  4. Reset your web browsers, such as Chrome, Firefox, or Edge, to their default settings. This can help remove any malicious extensions or settings changes made by the Trojan.
  5. After completing the above steps, reboot your system and perform another scan to ensure that the malware has been fully removed. Repeat the scanning process until no threats are detected.

Conclusion

Removing Trojan.Small from your system requires careful and immediate action to prevent further damage. By understanding how Trojans operate and following the steps outlined for removal, you can protect your computer and personal data from potential harm. Remember, prevention is key; always be cautious when downloading software, opening email attachments, or clicking on links from unknown sources. Regularly updating your operating system, browser, and security software can also significantly reduce the risk of infection. If you are unsure about any part of the removal process, consider seeking help from a cybersecurity professional to ensure your system is thoroughly cleaned and secured.

Aliases

15 security vendors flagged this file as malicious.

Antivirus Vendor Detection
Panda Trj/Dropper.JUW
Fortinet W32/Bublik.IJB!tr
AntiVir TR/Dropper.MSIL.Gen8
Kaspersky Trojan.Win32.Bublik.ijb
McAfee Generic Dropper!1ys
AVG Small.DSE
Fortinet MSIL/Agent.NRE
AntiVir TR/Rogue.7696779
Comodo TrojWare.MSIL.Agent.NRE
Sophos Mal/Generic-S
McAfee Artemis!AD1D76227900
AVG Small.EPZ
AntiVir TR/Spy.Gen
AVG Small.DPG
Fortinet W32/Agent.NQD!tr

File System Details

Trojan.Small may create the following file(s):
# File Name MD5 Detections
1. WpeSpy.dll 3fb67ceab8fb223312492842d7901e01 432
2. UDCS.del 90922dcdd8061a253c38331cd00b7f4a 42
3. csrssr.exe a619bf865103e649a0d982777ec68e5f 18
4. lsass.exe b2f7f05edb157fa02ed8622c1e32050d 16
5. easytether_x86.exe a11c59e11cb23eb77a9b3b2e05a8038c 15
6. wiadebug.exe c172362421ba36bf8a9ecaf1746e9ade 9
7. stlk.exe 8979bcc73a1967aa2495364322d88e8a 9
8. GoogleUpdateBeta.exe b00ddab62011882ed9e4b5960ee0f274 6
9. msdcsssc.exe 705b56f5e50af5d73432b5602513ebed 4
10. MsCtfMonitor.exe a213e3d724e07143663cdab36464d9b4 4
11. mspmsid.exe 9062f706ab6d9b3aeeb998bcce69b933 2
12. Dnscache.exe dde30704a5ba360e577ccbd000dd5d91 2
13. CG FUD.exe b1bb96d8653011c0dce2b825e1e5e360 1
14. tmp695.tmp.exe 25ec4aa3c491893e6addd8e3a81cbbdc 1
15. VSCover.exe 4ed67c056c520b02619836b5b5a03bed 1
16. upd.exe a90385f3cad3743ae8f2d90e37475d53 1
17. CLADD 053f46d2fb686277e92bc285c9f5d5c5 0
18. bpvol.dll 445d1efa817fd06d77b03aedca7c08a0 0
19. 84cczeh2.exe 1727dc4d5cf5f93f9f8eb7e43a5f6433 0
More files

Registry Details

Trojan.Small may create the following registry entry or registry entries:
Regexp file mask
%PUBLIC%\Videos\Adobe\upd.exe