MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 6f66ae1e090ea58336d9d56ae8b70e7993c8617e0f674ee1b55ed40d88a18845. 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: 11
| SHA256 hash: | 6f66ae1e090ea58336d9d56ae8b70e7993c8617e0f674ee1b55ed40d88a18845 |
|---|---|
| SHA3-384 hash: | 0235f73d89dab7ee4c3963c36aa8154912f481ff17e51619698a602132c2e17feceb9420d957c9fb9a6fdc816be0fda7 |
| SHA1 hash: | a0814d681b92f8f9f68f4c8e81f121c212dc4e34 |
| MD5 hash: | cf298cec02bd9a6a100b78836442a189 |
| humanhash: | neptune-leopard-march-summer |
| File name: | DOC098712340.js |
| Download: | download sample |
| Signature | Formbook |
| File size: | 358'177 bytes |
| First seen: | 2025-05-22 06:04:49 UTC |
| Last seen: | Never |
| File type: |  js |
| MIME type: | text/plain |
| ssdeep | 96:K5s/BpZKBpnpsuBpZFBpMpsLBp9BpBprpsNBpZrBpkfspBp9uBprBpsHBpZKjBpF:CCsvAlyIeFDaVLa |
| Threatray | 93 similar samples on MalwareBazaar |
| TLSH | T1B0742B9DADE30466349FF730A29725BC99276754C9026AFBE2B3B63310BCE5C10F1066 |
| Magika | javascript |
| Reporter |  abuse_ch |
| Tags: | FormBook js |
Intelligence
File Origin
# of uploads :
1
# of downloads :
416
Origin country :
NLVendor Threat Intelligence
Detection(s):
Verdict:
Malicious
Score:
99.9%
Tags:
obfuscate remcos xtreme shell
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
obfuscated
Verdict:
Malicious
Labled as:
Trojan_JS_RemcosRAT_RVA_MTB
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
Connects to a pastebin service (likely for C&C)
Creates autostart registry keys with suspicious values (likely registry only malware)
Found Tor onion address
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
JScript performs obfuscated calls to suspicious functions
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)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: New RUN Key Pointing to Suspicious Folder
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Script Initiated Connection to Non-Local Network
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
Switches to a custom stack to bypass stack traces
System process connects to network (likely due to code injection or exploit)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
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
Yara detected Powershell download and execute
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Score:
61%
Verdict:
Susipicious
File Type:
SCRIPT
Threat name:
Script-JS.Backdoor.Remcos
Status:
Malicious
First seen:
2025-05-21 17:03:55 UTC
File Type:
Binary
AV detection:
10 of 38 (26.32%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
formbook
Similar samples:
+ 83 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
8/10
Tags:
execution persistence
Behaviour
Modifies registry class
Script User-Agent
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Malware family:
FormBook
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.
No further information available
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