Trojan.Downloader.Gen.ASB
Trojan.Downloader.Gen.ASB is a detection name used to identify a type of malicious program that falls under the broader category of Trojan downloaders. As the name suggests, this type of threat is primarily designed to download and install additional malicious files onto a compromised computer, often without the user's knowledge or consent. Because this is a generic detection, it may be used to flag multiple variants of similar downloader-type malware that share common behaviors and characteristics rather than referring to a single, specific piece of code.
Table of Contents
What Trojan.Downloader.Gen.ASB Does
Like other members of the Trojan downloader family, Trojan.Downloader.Gen.ASB typically operates quietly in the background once it has infiltrated a system. Its main function is to establish a connection to a remote server controlled by cybercriminals and fetch additional malicious payloads. These payloads can vary widely and may include spyware, ransomware, adware, banking trojans, or other forms of malware, depending on the goals of the attackers behind the specific campaign.
Trojan downloaders of this kind are often designed to be lightweight and inconspicuous, making it easier for them to slip past basic security checks. Once installed, they may modify system settings, create new files or processes, and attempt to maintain persistence so they can continue running even after a system restart, though the exact techniques used can vary between variants.
How It Usually Gets Onto Computers
Trojan downloaders like this one typically spread through common infection vectors seen across the malware landscape. These often include malicious email attachments disguised as legitimate documents, bundled software downloaded from untrustworthy or pirated sources, fake software updates, and deceptive links found on compromised or malicious websites. Users may unknowingly install the Trojan while attempting to download cracked software, free tools, or media files from unreliable sources.
Risks for the User
The presence of a Trojan downloader on a system can expose users to significant risks, since it acts as a gateway for further infections. Depending on what additional malware is downloaded, victims may face data theft, financial loss, system instability, or loss of privacy. Because the actual payload can change, the full extent of the damage caused by Trojan.Downloader.Gen.ASB can vary from case to case, ranging from relatively minor nuisances like unwanted advertising to more severe threats such as credential theft or ransomware encryption.
Signs of Infection
Since Trojan downloaders are built to operate discreetly, infected systems may not show obvious symptoms right away. However, typical warning signs associated with this category of malware can include slower system performance, unexpected network activity, unfamiliar processes running in the background, new programs appearing without user installation, and security tools being disabled or malfunctioning. Users may also notice unusual pop-ups, browser redirects, or changes to system settings.
How to Stay Protected
To reduce the risk of infection from threats like Trojan.Downloader.Gen.ASB, users should avoid downloading software from unofficial or pirated sources, be cautious with email attachments and links from unknown senders, and keep their operating system and applications updated with the latest security patches. Running regular system scans, maintaining reputable security software, and practicing safe browsing habits are essential steps in defending against Trojan downloaders and the secondary threats they may introduce.
Analysis Report
General information
| Family Name: | Trojan.Downloader.Gen.ASB |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
c7ea152390f8fdd42198c996552c82fa
SHA1:
66da6e2222456a2f19a4b13e46aa4ddbae0585a8
SHA256:
226925DEEB44DFD412A3EF8812B86F8C8342E4528ACDF26FE1826877FA5DF855
File Size:
470.02 KB, 470016 bytes
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Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have security information
- File has exports table
- 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)
- IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)
File Traits
- dll
- x86
Block Information
Block Information
During analysis, EnigmaSoft breaks file samples into logical blocks for classification and comparison with other samples. Blocks can be used to generate malware detection rules and to group file samples into families based on shared source code, functionality and other distinguishing attributes and characteristics. This section lists a summary of this block data, as well as its classification by EnigmaSoft. A visual representation of the block data is also displayed, where available.| Total Blocks: | 1,166 |
|---|---|
| Potentially Malicious Blocks: | 133 |
| Whitelisted Blocks: | 1,033 |
| Unknown Blocks: | 0 |
Visual Map
? - Unknown Block
x - Potentially Malicious Block
Similar Families
Similar Families
This section lists other families that share similarities with this family, based on EnigmaSoft’s analysis. Many malware families are created from the same malware toolkits and use the same packing and encryption techniques but uniquely extend functionality. Similar families may also share source code, attributes, icons, subcomponents, compromised and/or invalid digital signatures, and network characteristics. Researchers leverage these similarities to rapidly and effectively triage file samples and extend malware detection rules.- Rugmi.FG
- Trojan.Downloader.Gen.ASB
Windows API Usage
Windows API Usage
This section lists Windows API calls that are used by the samples in this family. Windows API usage analysis is a valuable tool that can help identify malicious activity, such as keylogging, security privilege escalation, data encryption, data exfiltration, interference with antivirus software, and network request manipulation.| Category | API |
|---|---|
| Syscall Use |
Show More
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| Process Manipulation Evasion |
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| Process Shell Execute |
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| Anti Debug |
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Shell Command Execution
Shell Command Execution
This section lists Windows shell commands that are run by the samples in this family. Windows Shell commands are often leveraged by malware for nefarious purposes and can be used to elevate security privileges, download and launch other malware, exploit vulnerabilities, collect and exfiltrate data, and hide malicious activity.
C:\WINDOWS\SysWOW64\rundll32.exe C:\WINDOWS\system32\rundll32.exe c:\users\user\downloads\66da6e2222456a2f19a4b13e46aa4ddbae0585a8_0000470016.,LiQMAxHB
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