Trojan.Downloader.Gen.QW
Trojan.Downloader.Gen.QW is a detection name used to identify a type of malicious program classified as a Trojan downloader. Threats in this category are designed primarily to secretly connect to remote servers and download additional malicious files onto an infected computer. Because detailed technical specifics about this particular variant are not publicly documented, the information below reflects the typical behavior associated with Trojan downloader threats in general.
Table of Contents
What This Threat Does
Like other members of the Trojan downloader family, Trojan.Downloader.Gen.QW typically operates quietly in the background without the user's knowledge or consent. Its main purpose is usually not to cause direct damage itself, but rather to act as a delivery mechanism for other malware. Once active on a system, this type of threat commonly contacts a remote command-and-control server, retrieves additional malicious payloads, and installs them without any visible warning to the user. These secondary payloads can include spyware, ransomware, additional trojans, adware, or other unwanted programs, depending on what the attackers behind the campaign intend to deploy.
Trojan downloaders may also modify system settings, create new files, or establish persistence mechanisms so that they continue running even after a system restart, ensuring that malicious downloads can continue over time.
How It Usually Gets Onto Computers
Threats like Trojan.Downloader.Gen.QW typically spread through common infection methods used by trojans in general. These can include malicious email attachments disguised as legitimate documents or invoices, bundled downloads from untrustworthy or pirated software sources, fake software updates, infected removable drives, or links in deceptive advertisements and compromised websites. Because trojans rely on tricking users rather than self-replicating, social engineering tactics are usually a key part of how they are distributed.
Risks for the User
The presence of a Trojan downloader on a system poses significant risk because it opens the door for further infections. Once this type of threat establishes itself, a computer may become compromised by multiple additional malicious programs, each carrying its own set of dangers. These can range from data theft and credential harvesting to file encryption, unauthorized remote access, and financial loss. Because the downloader itself can fetch new threats at any time, an infected machine may become increasingly compromised the longer it goes undetected.
Signs of Infection
Trojan downloaders are typically built to run stealthily, so visible symptoms may not always be obvious. However, users may notice some common warning signs, including:
- Slower than usual system performance or increased CPU and network activity
- Unexpected programs or files appearing on the system
- Unusual network connections or data being sent and received without explanation
- New toolbars, browser changes, or unfamiliar processes running in the background
- Security software being disabled or unable to update properly
How to Stay Protected
To reduce the risk of encountering threats like Trojan.Downloader.Gen.QW, users should avoid opening email attachments or clicking links from unknown or unexpected senders, download software only from official and trusted sources, and keep their operating system and applications updated with the latest security patches. Running reputable, up-to-date security software and performing regular system scans can help detect and remove such threats before they can download additional malware. Maintaining regular backups of important data also helps minimize the impact if a system does become compromised.
Analysis Report
General information
| Family Name: | Trojan.Downloader.Gen.QW |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
b41fad5032baafabd4e919a8d22585ff
SHA1:
d0b80d1f94ea18db7ad95f1b2f7ce2347b215c67
SHA256:
B0D1F5BF4D013C1C620DEFD1903E1D92DEDC7A24C9ACB35D3022A8F6AD2CB3FD
File Size:
2.13 MB, 2127360 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have security information
- File has exports table
- File is 64-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)
Windows PE Version Information
Windows PE Version Information
This section displays values and attributes that have been set in the Windows file version information data structure for samples within this family. To mislead users, malware actors often add fake version information mimicking legitimate software.| Name | Value |
|---|---|
| Company Name | SQLite Development Team |
| File Description | SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. |
| File Version | 3.36.0 |
| Internal Name | sqlite3 |
| Legal Copyright | http://www.sqlite.org/copyright.html |
| Product Name | SQLite |
| Product Version | 3.36.0 |
| Source Id | 2021-06-18 18:36:39 5c9a6c06871cb9fe42814af9c039eb6da5427a6ec28f187af7ebfb62eafa66e5 |
File Traits
- 2+ executable sections
- dll
- x64
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: | 6,590 |
|---|---|
| Potentially Malicious Blocks: | 1 |
| Whitelisted Blocks: | 6,589 |
| 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.RE
- Rugmi.XD
- Trojan.Downloader.Gen.QW
- Trojan.Downloader.Gen.YO
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 |
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