MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 264e109751bb5d6f6c54a93a5a717ef05e28a49e82b362d2a8d09bc9cead9ee3. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.
Database Entry
GuLoader
Vendor detections: 11
| SHA256 hash: | 264e109751bb5d6f6c54a93a5a717ef05e28a49e82b362d2a8d09bc9cead9ee3 |
|---|---|
| SHA3-384 hash: | 70524eada3a14e8afb70d2367ce1758b66432a04cf0529e6ea2042d00800929eb17ae85129d3c9757386dd5c7b80bcdb |
| SHA1 hash: | 6374f41dab05b67b4ea63543bcb8b4c766886b63 |
| MD5 hash: | a19c8cb7ae5297c8c764d3e9ced0441c |
| humanhash: | earth-autumn-sodium-don |
| File name: | RFQ 000240_RO_xlsx.js |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 27'999 bytes |
| First seen: | 2026-11-10 06:56:13 UTC |
| Last seen: | Never |
| File type: |  js |
| MIME type: | text/plain |
| ssdeep | 384:TOH5pkN3cuhLLH67we8ko+Iki5Qmv/L6luDjaVCx4VCDgSHYeJr2PV/KUgdK60Vs:E5arLgwM/7mulDVCxITSzKPVi/z0m |
| TLSH | T14DC22A404B476CB10B46B781CD4B4DA5CCE58A02C472DFA0F5EF9B15E142998EEB96CF |
| Magika | javascript |
| Reporter |  lowmal3 |
| Tags: | GuLoader js |
Intelligence
File Origin
# of uploads :
1
# of downloads :
154
Origin country :
DEVendor Threat Intelligence
No detections
Verdict:
Malicious
Score:
92.5%
Tags:
stration autorun shell sage
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Using the Windows Management Instrumentation requests
Running batch commands
Creating a process with a hidden window
Launching cmd.exe command interpreter
Launching a process
Deleting a recently created file
Sending a custom TCP request
DNS request
Connection attempt
Sending an HTTP GET request
Creating synchronization primitives
Possible injection to a system process
Creating a file in the Windows directory
Forced shutdown of a system process
Unauthorized injection to a system process
Verdict:
Suspicious
Labled as:
JS/Agent.FKB
Verdict:
Malicious
File Type:
js
Result
Threat name:
GuLoader
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
Check if machine is in data center or colocation facility
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Creates processes via WMI
Found suspicious powershell code related to unpacking or dynamic code loading
Hides threads from debuggers
JavaScript source code contains functionality to generate code involving a shell, file or stream
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Obfuscated command line found
Powershell connects to network
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Unusual module load detection (module proxying)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected GuLoader
Behaviour
Behavior Graph:
Verdict:
inconclusive
YARA:
3 match(es)
Tags:
PowerShell T1059.001
Threat name:
Script-JS.Trojan.Guloader
Status:
Malicious
First seen:
2026-11-09 23:56:36 UTC
File Type:
Text (JavaScript)
AV detection:
4 of 36 (11.11%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
10/10
Tags:
defense_evasion discovery execution privilege_escalation ransomware
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Volume Shadow Copy service COM API
Command and Scripting Interpreter: JavaScript
Executes a command shell one-liner
Reads the TCP/IP host and domain name from the registry
System Location Discovery: System Language Discovery
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Badlisted process makes network request
Process spawned unexpected child process
Malware Family:
gen3
Malicious:
True
Tags:
javascript
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
YARA Signatures
MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.
| Rule name: | detect_powershell |
|---|---|
| Author: | daniyyell |
| Description: | Detects suspicious PowerShell activity related to malware execution |
| Rule name: | Detect_PowerShell_Obfuscation |
|---|---|
| Author: | daniyyell |
| Description: | Detects obfuscated PowerShell commands commonly used in malicious scripts. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
No further information available
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