Trojan.Agent.Gen.GAO
Trojan.Agent.Gen.GAO is a generic detection name used to identify a trojan-type threat that behaves in ways consistent with other malicious programs grouped under the broad "Agent" family. Detections labeled "Gen" typically mean the file was flagged based on behavioral or heuristic patterns rather than an exact, previously cataloged signature. This means Trojan.Agent.Gen.GAO may represent a variety of malicious files that share similar code structures, functions, or behaviors rather than a single, specific piece of malware.
Because detailed technical specifics about this particular detection are not confirmed, the description below reflects the typical behavior of trojans in this category, which commonly perform these actions once active on a system.
Table of Contents
What This Threat Typically Does
Trojans classified under generic "Agent" detections commonly run quietly in the background without the user's knowledge or consent. Typical behavior for this type of threat includes:
- Downloading and installing additional malicious components onto the infected device
- Modifying system settings or configuration files to maintain persistence
- Communicating with a remote server controlled by attackers to receive instructions
- Collecting information from the infected machine, such as system details or browsing activity
- Disabling or interfering with security tools to avoid detection and removal
The exact capabilities of any individual file flagged as Trojan.Agent.Gen.GAO can vary, since the detection is heuristic-based and may apply to multiple unrelated malicious files sharing common traits.
How It Usually Gets Onto Computers
Trojans in this category typically spread through methods common to the broader trojan class, including:
- Email attachments or links in phishing messages disguised as legitimate documents or invoices
- Bundled installers for free or pirated software, including cracks and keygens
- Fake software updates or misleading download buttons on untrustworthy websites
- Malicious advertisements that redirect users to infected downloads
- Infected removable drives or peer-to-peer file sharing networks
Risks for the User
If left on a system, a trojan like this can expose users to several risks, including data theft, unauthorized remote access, financial loss, and further infections from additional malware it may download. Because trojans often operate silently, users may not immediately notice any impact, allowing attackers extended access to the compromised system.
Signs of Infection
Since this detection is generic, visible symptoms can vary widely, but typical warning signs associated with trojans include:
- Noticeable system slowdowns or increased CPU/network usage without a clear cause
- Unexpected pop-ups, error messages, or changes to browser or system settings
- New or unfamiliar programs appearing without the user's installation
- Security software being disabled or unable to update
- Unusual outbound network connections
How to Stay Protected
To reduce the risk of infection from threats like Trojan.Agent.Gen.GAO, users should keep their operating system and all installed software updated, avoid downloading programs from unverified or pirated sources, be cautious with email attachments and links from unknown senders, and use reputable security software to scan and monitor the system regularly. Maintaining regular backups of important files can also minimize damage in case of infection, while practicing safe browsing habits significantly lowers the chances of encountering such threats in the first place.
Analysis Report
General information
| Family Name: | Trojan.Agent.Gen.GAO |
|---|---|
| Signature status: | Self Signed |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
3f8fa75718b6d1b443b788a68cfdaf1e
SHA1:
099349795fbbf59074b55926818ee554273f3ca9
SHA256:
94069806A751BEADB67663DA37D0CB0697AB3D19A6E27F1E2118875BA17EAAC5
File Size:
55.30 KB, 55296 bytes
|
|
MD5:
1def2ec226d667dece04162bdf7b9b69
SHA1:
1b1aae6f2f2c4373b6d8be7d22422f8787fa28a1
SHA256:
72FF3D5068252BD439E2E79570EAE5257B0D3E07E37FC72D62435B9D502514A2
File Size:
5.17 MB, 5168536 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 has exports table
- File has TLS information
- File is 64-bit executable
- File is console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
- File is either console or GUI application
- File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
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- 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 Icons
File Icons
This section displays icon resources found within family samples. Malware often replicates icons commonly associated with legitimate software to mislead users into believing the malware is safe.
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 | Google LLC |
| File Description |
|
| File Version |
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| Internal Name |
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| Legal Copyright | Copyright 2026 Google LLC. All rights reserved. |
| Original Filename |
|
| Product Name |
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| Product Version |
|
Digital Signatures
Digital Signatures
This section lists digital signatures that are attached to samples within this family. When analyzing and verifying digital signatures, it is important to confirm that the signature’s root authority is a well-known and trustworthy entity and that the status of the signature is good. Malware is often signed with non-trustworthy “Self Signed” digital signatures (which can be easily created by a malware author with no verification). Malware may also be signed by legitimate signatures that have an invalid status, and by signatures from questionable root authorities with fake or misleading “Signer” names.| Signer | Root | Status |
|---|---|---|
| Google LLC | Google LLC | Self Signed |
File Traits
- dll
- HighEntropy
- Installer Version
- WriteProcessMemory
- 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: | 999 |
|---|---|
| Potentially Malicious Blocks: | 301 |
| Whitelisted Blocks: | 698 |
| Unknown Blocks: | 0 |
Visual Map
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0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block
? - 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.- Trojan.Agent.Gen.FQJ
- Trojan.Agent.Gen.GAO
- Trojan.Kryptik.Gen.KLV
Files Modified
Files Modified
This section lists files that were created, modified, moved and/or deleted by samples in this family. File system activity can provide valuable insight into how malware functions on the operating system.| File | Attributes |
|---|---|
| c:\users\user\appdata\local\google\chrome\bwhkcggxry\chrome140.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 262144 |
| c:\users\user\appdata\local\google\chrome\bwhkcggxry\chrome140.exe | Read Attributes,Synchronize,Write Attributes |
| c:\users\user\appdata\local\google\chrome\bwhkcggxry\google.dll | Generic Write,Read Attributes |
| c:\users\user\appdata\local\google\chrome\bwhkcggxry\google.dll | Read Attributes,Synchronize,Write Attributes |
| c:\users\user\appdata\local\google\chrome\bwhkcggxry\gupdt.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 262144 |
| c:\users\user\appdata\local\google\chrome\bwhkcggxry\gupdt.exe | Read Attributes,Synchronize,Write Attributes |
| c:\users\user\appdata\local\google\chrome\bwhkcggxry\gupw.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 262144 |
| c:\users\user\appdata\local\google\chrome\bwhkcggxry\gupw.exe | Read Attributes,Synchronize,Write Attributes |
| c:\users\user\ntuser.dat{53b39e87-18c4-11ea-a811-000d3aa4692b}.txr.3.regtrans-ms | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\ntuser.dat{53b39e87-18c4-11ea-a811-000d3aa4692b}.txr.4.regtrans-ms | Generic Read,Write Data,Write Attributes,Write extended,Append data |
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| c:\users\user\ntuser.dat{53b39e87-18c4-11ea-a811-000d3aa4692b}.txr.5.regtrans-ms | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\ntuser.dat{53b39e87-18c4-11ea-a811-000d3aa4692b}.txr.6.regtrans-ms | Generic Read,Write Data,Write Attributes,Write extended,Append data |
Registry Modifications
Registry Modifications
This section lists registry keys and values that were created, modified and/or deleted by samples in this family. Windows Registry activity can provide valuable insight into malware functionality. Additionally, malware often creates registry values to allow itself to automatically start and indefinitely persist after an initial infection has compromised the system.| Key::Value | Data | API Name |
|---|---|---|
| HKCU\software\google\chrome\bwhkcggxry::ldr | x�} xW�����$���(�C�6qd�Q;m�eI���mՒ'M;�m��%�G� \C�jp ?��p,���fYh��rhR���XJ[����i!��ͦK��s�G�]�Z �}�;��s�9��s�}�h�}�1B �%�aG3����r�c���%�]u���*�p(a�ţC�?�D�־�5��XC���g ��**Jk^! X"d�aΓwXˌ�d�.��HH�e�V!R�F"\��x� ��� | RegNtPreCreateKey |
| HKCU\software\google\chrome\bwhkcggxry::lsz | 雒 | RegNtPreCreateKey |
| HKCU\software\google\chrome\bwhkcggxry::isz | �p | RegNtPreCreateKey |
| HKCU\software\google\chrome\bwhkcggxry::udir | C:\Users\Lldqpajw\AppData\Local\Google\Chrome\bwhkcggxry | RegNtPreCreateKey |
| HKCU\software\microsoft\windows\currentversion\run::googleupdate140 | "C:\Users\Lldqpajw\AppData\Local\Google\Chrome\bwhkcggxry\chrome140.exe" /user | RegNtPreCreateKey |
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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|
| Service Control |
|
| Encryption Used |
|
