MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 c48b4f43a3e30194eaa5c877fa8db49be22fe74a1777e267e68de3e9bc8577fd. 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: | c48b4f43a3e30194eaa5c877fa8db49be22fe74a1777e267e68de3e9bc8577fd |
|---|---|
| SHA3-384 hash: | cf35949f12f006880ebcfa163a026777930b47652368793010d3dc161d701f3fd15b10fa6445a0f9c9f7d4be5086b339 |
| SHA1 hash: | af64cb7d80ad676825a1c8b021e9b3736d7eba9e |
| MD5 hash: | aa4d761fe9803f4eb66f4c5f4afd4f41 |
| humanhash: | music-oscar-maryland-spring |
| File name: | SPECIFICATIONS.js |
| Download: | download sample |
| Signature | Formbook |
| File size: | 30'406 bytes |
| First seen: | 2026-06-15 12:22:55 UTC |
| Last seen: | Never |
| File type: |  js |
| MIME type: | text/plain |
| ssdeep | 768:0fyVeG3wdBKimZRc5pzhpQbxQ9610l7CFJSc:QnA1ZJxQ96y7cUc |
| TLSH | T1D7D270C937D5B4644323BC3B7E6BB2E6E16D8CC8BA5C9444FBA5708AFC24708C925758 |
| Magika | javascript |
| Reporter |  threatcat_ch |
| Tags: | FormBook js |
Intelligence
File Origin
# of uploads :
1
# of downloads :
138
Origin country :
CHVendor Threat Intelligence
No detections
Verdict:
Malicious
Score:
90.2%
Tags:
shellcode shell hype
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
aspnet_compiler base64 encrypted evasive evasive lolbin obfuscated reconnaissance repaired
Verdict:
Malicious
Labled as:
SVM:TrojanDownloader/JS.Nemucod
Verdict:
Malicious
File Type:
js
First seen:
2026-06-15T01:17:00Z UTC
Last seen:
2026-06-15T08:53:00Z UTC
Hits:
~1000
Detections:
HEUR:Trojan.Script.Badur.genw Trojan-Downloader.JS.SLoad.sb HEUR:Trojan-Downloader.Script.Generic Trojan-Downloader.Agent.HTTP.C&C PDM:Trojan.Win32.Generic HEUR:Trojan.Script.Generic Trojan.Win32.Agent.sb Trojan.JS.SAgent.sb Trojan-Spy.Win32.Noon.sb
Result
Threat name:
FormBook
Detection:
malicious
Classification:
evad.troj.spyw.expl
Score:
100 / 100
Signature
.NET source code contains potential unpacker
AI detected malicious Powershell script
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
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
Potential obfuscated javascript found
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Script Initiated Connection to Non-Local Network
Sigma detected: Suspicious PowerShell Parameter Substring
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
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)
Unusual module load detection (module proxying)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
WScript reads language and country specific registry keys (likely country aware script)
Wscript starts Powershell (via cmd or directly)
Yara detected FormBook
Yara detected Generic JS Downloader
Yara detected Powershell decode and execute
Behaviour
Behavior Graph:
Score:
97%
Verdict:
Malware
File Type:
SCRIPT
Gathering data
Verdict:
Malicious
Threat:
Family.FORMBOOK
Detection(s):
Suspicious file
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook adware collection discovery execution rat spyware stealer trojan
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
Command and Scripting Interpreter: JavaScript
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Checks computer location settings
Badlisted process makes network request
Family: Formbook
Formbook payload
Malware family:
FormBook
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
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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