Threat Database Trojans Trojan.Locky.LB

Trojan.Locky.LB

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 17
First Seen: June 16, 2021
Last Seen: October 13, 2026
OS(es) Affected: Windows

Trojan.Locky.LB is a Windows-based Trojan horse that quietly infiltrates computers and performs malicious actions in the background without the user's knowledge or consent. Classified as a high-risk threat with a danger level of 8 out of 10, this Trojan is designed to give attackers unauthorized access to an infected system, making it a serious concern for both home users and businesses.

What Trojan.Locky.LB Does

Once Trojan.Locky.LB installs itself on a computer, it runs silently in the background, avoiding detection while it carries out harmful tasks. Like other threats in the Trojan category, it may give remote attackers significant or even complete control over the infected system. This can include the ability to covertly delete files, install additional malware onto the machine, steal sensitive information, change system settings, and monitor the victim's activity. Because the Trojan operates stealthily, many users remain unaware that their computer has been compromised until significant damage has already been done.

How It Usually Gets Onto Computers

Trojan.Locky.LB typically spreads by exploiting system vulnerabilities and security flaws found in outdated software or unpatched operating systems. It is also commonly distributed through software downloads from malicious or compromised websites. Another common infection method involves email attachments sent from untrusted or unknown sources. These attachments may be disguised as harmless files, including executables (.exe), screensavers (.pif), video files (.avi), or even image files (.jpg), tricking users into opening them. Once opened, the malicious code executes and the Trojan installs itself without any visible warning signs.

Risks for the User

The presence of Trojan.Locky.LB on a system poses serious risks. Because it can grant hackers remote access, attackers may use the infection to steal personal or financial information, harvest login credentials, or spy on the user's online activities. The Trojan can also serve as a gateway for additional malware, including ransomware or spyware, to be downloaded and installed on the compromised machine. Deleted files, altered system settings, and degraded system performance are also common consequences. In some cases, infected machines may be enlisted into larger networks controlled by attackers for further malicious purposes.

Signs of Infection

Because Trojans like Locky.LB are designed to operate stealthily, noticeable symptoms can be subtle or absent. However, users should watch for warning signs such as unexplained slowdowns in system performance, unfamiliar processes running in the background, unexpected changes to system or browser settings, programs crashing or behaving erratically, and files going missing or becoming inaccessible. Unusual network activity or unexpected outbound connections can also indicate that a Trojan is communicating with a remote attacker.

How to Stay Protected

To reduce the risk of infection from threats like Trojan.Locky.LB, users should keep their operating system and all installed software fully updated to close known security vulnerabilities. Avoid downloading software from untrusted or unofficial websites, and never open email attachments from unknown or unexpected senders, especially executable files or files with unusual extensions. Maintaining regular backups of important files, using a reputable and up-to-date security solution, and practicing caution when browsing the web are all essential steps toward protecting your system from this and similar Trojan threats.

Analysis Report

General information

Family Name: Trojan.Locky.LB
Signature status: No Signature

Known Samples

MD5: ec60506a4b8664bb838228515cbc90e1
SHA1: 4fdb40ce3dc66138481ceef74295624d24e51dc9
SHA256: 9FDE08F5B08D38F5B3BBF06D072363513D368C39ECBFB734A25648133B429CEB
File Size: 407.55 KB, 407552 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • File doesn't have debug information
  • File doesn't have exports table
  • File doesn't have security information
  • File is 32-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is Native application (NOT .NET application)
  • File is not packed
  • IMAGE_FILE_DLL is not set inside PE header (Executable)
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  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Icons

File Traits

  • 2+ executable sections
  • HighEntropy
  • No Version Info
  • x86

Block Information

Total Blocks: 316
Potentially Malicious Blocks: 195
Whitelisted Blocks: 121
Unknown Blocks: 0

Visual Map

0 0 0 0 0 0 0 0 x 0 0 0 0 0 x 0 0 0 x 0 x x 0 x x x x 0 x 0 x x 0 x x x x x 0 x 0 x x 0 0 x x x x 0 x 0 x x 0 0 x x x x 0 0 x 0 x x 0 0 x x x x 0 0 x 0 x x 0 0 x x x x 0 0 x 0 x x 0 x x x x x 0 0 x 0 x x 0 x x x x x 0 0 x 0 x x 0 x x x x x 0 0 x 0 x x 0 x x x x x 0 0 x 0 x x 0 x x x x x 0 0 x 0 x x 0 0 x x x x 0 0 x x x 0 0 x x x x 0 0 x 0 x x 0 x x x x x 0 0 x 0 x x 0 x x x x x 0 0 x 0 x x 0 0 x x x x 0 0 x x x 0 x x x x x 0 0 x 0 x x 0 x x x x x 0 0 x x x 0 x x x x x 0 0 x x x 0 0 x x x x 0 x 0 x x 0 0 x x x x 0 0 x 0 x x 0 x x x x x 0 0 x 0 x x 0 x x x x x 0 0 x 0 x x 0 0 x x x x 0 0 x x x 0 x x x x x 0 0 x 0 x x 0 0 x 0
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

Similar Families

  • Locky.LC