MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f787bb3704a9fe637e0e2ebdfb570ed8ae9dff3495bf4b765deb21dcde55e711. 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: 10


Intelligence 10 IOCs YARA 2 File information Comments
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SHA256 hash: f787bb3704a9fe637e0e2ebdfb570ed8ae9dff3495bf4b765deb21dcde55e711
SHA3-384 hash: dda6ec054c33b6341256c3e85025b225b9cdbf41fe62c7b0b00df4b1cd3ddbf591cbd87c608bc371c67b26a920633733
SHA1 hash: dd5bceca6dc28755095c290ed274d70e6fbc0b4a
MD5 hash: 1f8499799f482802918c2c5fde6c179f
humanhash: social-network-violet-early
File name:SW_683200.js
Download: download sample
Signature Formbook
Create hunting rule
File size:971'816 bytes
First seen:2026-08-06 14:35:07 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 24576:GOP8YAzjiKHhMVVMZgbuK/FBH84/g0nSdxmDORtwE4AAodgf:wYAj60y0tE
TLSH T13B255CED82349405132C2AB21A47A496504BF56DB70BC2379276C6BD179F291FC3B8BF
Magika javascript
Reporter abuse_ch
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
156
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.JS.Muldrop.1383.19429.31828.UNOFFICIAL
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Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
downloader encrypted repaired
Link:
https://www.filescan.io/uploads/6a749bdf54bff14a4bde4e0e/reports/43be0102-83b6-4afd-a924-afcfcc75a862/overview
Verdict:
Malicious
Labled as:
Trojan.JS.Downloader.JS
Link:
https://www.hybrid-analysis.com/sample/f787bb3704a9fe637e0e2ebdfb570ed8ae9dff3495bf4b765deb21dcde55e711
Verdict:
Malicious
File Type:
js
First seen:
2026-08-05T10:08:00Z UTC
Last seen:
2026-08-08T10:19:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/f787bb3704a9fe637e0e2ebdfb570ed8ae9dff3495bf4b765deb21dcde55e711/results?tab=lookup
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
evad.troj.spyw.expl
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1953482
Signature
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
Bypasses PowerShell execution policy
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
JScript performs obfuscated calls to suspicious functions
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
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Suspicious PowerShell Parameter Substring
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Sigma detected: WScript or CScript Dropper - File
Suricata IDS alerts for network traffic
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)
Windows Shell Script Host drops VBS files
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 AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1953482 Sample: SW_683200.js Startdate: 06/08/2026 Architecture: WINDOWS Score: 100 57 www.nn33to.xyz 2->57 59 viviasquare.shop 2->59 61 24 other IPs or domains 2->61 75 Suricata IDS alerts for network traffic 2->75 77 Antivirus detection for URL or domain 2->77 79 Multi AV Scanner detection for submitted file 2->79 83 9 other signatures 2->83 12 wscript.exe 1 6 2->12         started        signatures3 81 Performs DNS queries to domains with low reputation 57->81 process4 file5 49 C:\Users\user\AppData\...\svc_82641_e6ff, ASCII 12->49 dropped 51 C:\Users\user\AppData\...\svc_22077_e79b.vbs, ASCII 12->51 dropped 53 C:\Users\user\AppData\...\run_81196_e6ff.ps1, C 12->53 dropped 55 C:\Users\user\AppData\...\log_12586_e6ff, ASCII 12->55 dropped 107 JScript performs obfuscated calls to suspicious functions 12->107 109 Suspicious powershell command line found 12->109 111 Wscript starts Powershell (via cmd or directly) 12->111 113 5 other signatures 12->113 16 wscript.exe 1 12->16         started        signatures6 process7 signatures8 69 Suspicious powershell command line found 16->69 71 Wscript starts Powershell (via cmd or directly) 16->71 73 WScript reads language and country specific registry keys (likely country aware script) 16->73 19 powershell.exe 23 16->19         started        process9 file10 45 C:\Users\user\AppData\...\s5ecfv5c.cmdline, Unicode 19->45 dropped 85 Writes to foreign memory regions 19->85 87 Injects a PE file into a foreign processes 19->87 23 MSBuild.exe 19->23         started        26 csc.exe 3 19->26         started        29 conhost.exe 19->29         started        signatures11 process12 file13 97 Modifies the context of a thread in another process (thread injection) 23->97 99 Maps a DLL or memory area into another process 23->99 101 Queues an APC in another process (thread injection) 23->101 103 3 other signatures 23->103 31 GYukyiQDfPYV.exe 23->31 injected 47 C:\Users\user\AppData\Local\...\s5ecfv5c.dll, PE32 26->47 dropped 34 cvtres.exe 1 26->34         started        signatures14 process15 signatures16 115 Binary is likely a compiled AutoIt script file 31->115 117 Maps a DLL or memory area into another process 31->117 119 Found direct / indirect Syscall (likely to bypass EDR) 31->119 36 findstr.exe 13 31->36         started        process17 signatures18 89 Tries to steal Mail credentials (via file / registry access) 36->89 91 Tries to harvest and steal browser information (history, passwords, etc) 36->91 93 Modifies the context of a thread in another process (thread injection) 36->93 95 3 other signatures 36->95 39 N2FHvNApOP.exe 36->39 injected 43 firefox.exe 36->43         started        process19 dnsIp20 63 72.251.11.125, 49885, 49886, 49887 OVHFR Canada 39->63 65 parking.d.parity.domains 72.251.11.93, 49873, 49874, 49875 OVHFR Canada 39->65 67 14 other IPs or domains 39->67 105 Binary is likely a compiled AutoIt script file 39->105 signatures21
Score:
97%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/f787bb3704a9fe637e0e2ebdfb570ed8ae9dff3495bf4b765deb21dcde55e711
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f787bb3704a9fe637e0e2ebdfb570ed8ae9dff3495bf4b765deb21dcde55e711/
Threat name:
Script-JS.Trojan.Redirector
Create hunting rule
Status:
Malicious
First seen:
2026-08-05 15:36:02 UTC
File Type:
Text (JavaScript)
AV detection:
11 of 24 (45.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=66d3wnyevh7gg7qof267wvyo3cxj37zusw7uw5s55mq5zxsv44iq._file
Verdict:
malicious
Label(s):
Formbook
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Link:
https://reports.threatray.com/f8f6070e-11c4-4a7c-bd6d-e78fdbbaf791
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/260806-rygspsdl9w/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Executes a VBScript file via the Windows Script Host.
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.07
Link:
https://yomi.yoroi.company/submissions/f787bb3704a9fe637e0e2ebdfb570ed8ae9dff3495bf4b765deb21dcde55e711

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:SUSP_obfuscated_JS_obfuscatorio
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Author:@imp0rtp3
Description:Detect JS obfuscation done by the js obfuscator (often malicious)
Reference:https://obfuscator.io
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Comments