MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 a5f96fa2821453e5c74f060e18b77424990f72e6387c60caff32a35d02c29758. 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
Formbook
Vendor detections: 13
| SHA256 hash: | a5f96fa2821453e5c74f060e18b77424990f72e6387c60caff32a35d02c29758 |
|---|---|
| SHA3-384 hash: | bfc66f985ecb84459113669570cf609ebf1572d35fd5152068d6b58415bf0391bf685e2c19493edae9527afe528cb9d6 |
| SHA1 hash: | 0891120d2b3867547e533ef398694c0858f2cd14 |
| MD5 hash: | 8d47610408b099f69dbf4aab6f6c1157 |
| humanhash: | pluto-magazine-vermont-eighteen |
| File name: | PRQ-26-0162.JS |
| Download: | download sample |
| Signature | Formbook |
| File size: | 5'790'328 bytes |
| First seen: | 2026-01-30 11:21:36 UTC |
| Last seen: | Never |
| File type: |  js |
| MIME type: | text/plain |
| ssdeep | 98304:6JzXKn37mem+xES+8pyJKGNmOi20DOjcSnETz+1S9YlUsiDkNfKCOc9DJ27uhDg/:6JrsmenxEQpJGJipDlSnE1xDuKTcjyP/ |
| Threatray | 2'716 similar samples on MalwareBazaar |
| TLSH | T14C463B843708D0719A27CFBD2A36A9D094995C7738C4CF15B089F9A1BB19D2FEB907B1 |
| Magika | javascript |
| Reporter |  lowmal3 |
| Tags: | FormBook js |
Intelligence
File Origin
# of uploads :
1
# of downloads :
143
Origin country :
DEVendor Threat Intelligence
No detections
Detection(s):
Verdict:
Malicious
Score:
81.4%
Tags:
obfuscate xtreme blic
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
aes base64 base64 base64 crypto evasive obfuscated obfuscated powershell privilege reconnaissance repaired
Verdict:
Malicious
File Type:
js
First seen:
2026-01-29T23:22:00Z UTC
Last seen:
2026-02-01T08:07:00Z UTC
Hits:
~1000
Detections:
Trojan-Spy.Win32.Noon.sb Trojan-Downloader.MSIL.Agent.c Trojan-Downloader.JS.SLoad.sb Trojan.MSIL.Crypt.sb HEUR:Trojan.Win32.Agentb.gen Trojan-Downloader.MSIL.Seraph.d Trojan.JS.SAgent.sb PDM:Trojan.Win32.Generic HEUR:Trojan.PowerShell.Tesre.sb HEUR:Trojan.Script.Generic
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Injects a PE file into a foreign processes
JavaScript source code contains functionality to generate code involving a shell, file or stream
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Queues an APC in another process (thread injection)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: PowerShell Base64 Encoded IEX Cmdlet
Sigma detected: Windows Shell/Scripting Application File Write to Suspicious Folder
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line 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 FormBook
Yara detected Powershell decode and execute
Behaviour
Behavior Graph:
Gathering data
Verdict:
Malicious
Threat:
Trojan-Downloader.MSIL.Noon
Threat name:
Win32.Trojan.Znyonm
Status:
Malicious
First seen:
2026-01-30 05:00:50 UTC
File Type:
Binary
AV detection:
7 of 24 (29.17%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
formbook
Similar samples:
+ 2'706 additional samples on MalwareBazaar
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Command and Scripting Interpreter: PowerShell
Checks computer location settings
Formbook payload
Formbook
Formbook family
Malware family:
DnlibLoader
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
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