MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 664e8ea263f2cec14927d140deb99bfa8e9cf3194bc64afdb2bbc492e5d34057. 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: 9


Intelligence 9 IOCs YARA 16 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 664e8ea263f2cec14927d140deb99bfa8e9cf3194bc64afdb2bbc492e5d34057
SHA3-384 hash: 365434ef02bc990e27a03697850999b09ea1359b4cb60201b56a0c620d0d4db99e4510828d111ad741e61a474fd5c1e9
SHA1 hash: 2fe85d97d06142c78178f1cffbb244f97abb6288
MD5 hash: 8649b5b07cbaed2fd695ea611e8fd0d5
humanhash: nevada-wolfram-seven-low
File name:Barclays MT103 Confirmation copy.js
Download: download sample
Signature Formbook
Create hunting rule
File size:3'109'525 bytes
First seen:2026-08-05 07:58:10 UTC
Last seen:2026-08-05 12:24:23 UTC
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 12288:tHerLrFZf/4Vq2TUrhektMavdWBXesuWV2r/ivbo0NNuM4J98:yXvf/2Qhe6JlAWM5
TLSH T1BEE518F377AE2B5656A43B1E740D2A940B2EC0B50DD257E8F8CF1AA85F4F0071DA498D
Magika javascript
Reporter abuse_ch
Tags:Barclays FormBook js

Intelligence

File Origin
# of uploads :
2
# of downloads :
134
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm aspnet_compiler base64 base64 cscript encrypted evasive evasive fingerprint lolbin obfuscated obfuscated powershell reconnaissance repaired taskkill wscript
Link:
https://www.filescan.io/uploads/6a72ed227bb7fba3cab83eb1/reports/bb5ec809-e7ac-4019-a984-22001a76fbdc/overview
Verdict:
Suspicious
Labled as:
JS/Packed.Agent
Link:
https://www.hybrid-analysis.com/sample/664e8ea263f2cec14927d140deb99bfa8e9cf3194bc64afdb2bbc492e5d34057
Verdict:
Malicious
File Type:
Txt
First seen:
2026-08-05T04:44:00Z UTC
Last seen:
2026-08-05T04:54:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/664e8ea263f2cec14927d140deb99bfa8e9cf3194bc64afdb2bbc492e5d34057/results?tab=lookup
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1952575
Signature
.NET source code contains method to dynamically call methods (often used by packers)
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
JavaScript file contains suspicious strings
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)
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: 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 reads language and country specific registry keys (likely country aware script)
Wscript starts Powershell (via cmd or directly)
Yara detected FormBook
Yara detected Powershell decode and execute
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1952575 Sample: Barclays MT103 Confirmation... Startdate: 05/08/2026 Architecture: WINDOWS Score: 100 43 www.quantrai.xyz 2->43 45 www.teamswanborn.nl 2->45 47 7 other IPs or domains 2->47 55 Malicious sample detected (through community Yara rule) 2->55 57 Antivirus detection for URL or domain 2->57 59 Multi AV Scanner detection for submitted file 2->59 63 7 other signatures 2->63 11 wscript.exe 3 2->11         started        signatures3 61 Performs DNS queries to domains with low reputation 43->61 process4 signatures5 85 Suspicious powershell command line found 11->85 87 Wscript starts Powershell (via cmd or directly) 11->87 89 Bypasses PowerShell execution policy 11->89 91 3 other signatures 11->91 14 powershell.exe 16 11->14         started        17 taskkill.exe 1 11->17         started        process6 signatures7 93 Writes to foreign memory regions 14->93 95 Injects a PE file into a foreign processes 14->95 19 aspnet_compiler.exe 14->19         started        22 aspnet_compiler.exe 14->22         started        24 aspnet_compiler.exe 14->24         started        28 24 other processes 14->28 26 conhost.exe 17->26         started        process8 signatures9 65 Modifies the context of a thread in another process (thread injection) 19->65 67 Maps a DLL or memory area into another process 19->67 69 Queues an APC in another process (thread injection) 19->69 30 6fcQRkE7DxhIrt.exe 19->30 injected 71 Found direct / indirect Syscall (likely to bypass EDR) 22->71 34 Fu2x6P1FATQs.exe 22->34 injected 73 Unusual module load detection (module proxying) 24->73 75 Switches to a custom stack to bypass stack traces 24->75 process10 dnsIp11 49 www.quantrai.xyz 159.198.43.66, 49721, 49722, 49723 NAMECHEAP-NET-NamecheapIncUS United States 30->49 51 matchfix.co.za 129.232.128.66, 49725, 49726, 49727 xneeloZA South Africa 30->51 53 3 other IPs or domains 30->53 97 Binary is likely a compiled AutoIt script file 30->97 99 Maps a DLL or memory area into another process 30->99 101 Found direct / indirect Syscall (likely to bypass EDR) 30->101 36 icacls.exe 13 30->36         started        39 icacls.exe 34->39         started        signatures12 process13 signatures14 77 Tries to steal Mail credentials (via file / registry access) 36->77 79 Tries to harvest and steal browser information (history, passwords, etc) 36->79 81 Modifies the context of a thread in another process (thread injection) 36->81 83 3 other signatures 36->83 41 firefox.exe 36->41         started        process15
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/664e8ea263f2cec14927d140deb99bfa8e9cf3194bc64afdb2bbc492e5d34057
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/664e8ea263f2cec14927d140deb99bfa8e9cf3194bc64afdb2bbc492e5d34057/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mzhi5itd6lhmcsjh2fan5om37khjz4yzjpdev7nsxpcjfzotiblq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook adware collection defense_evasion discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/260805-jt2y3sxzby/
Behaviour
Kills process with taskkill
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
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Checks computer location settings
Modifies file permissions
Badlisted process makes network request
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:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/664e8ea263f2cec14927d140deb99bfa8e9cf3194bc64afdb2bbc492e5d34057

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
Create hunting rule
Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:TH_Win_ETW_Bypass_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Windows ETW Bypass Detection Rule - 2025
Reference:https://cyfare.net/

File information

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

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