MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8160be5c40028ff2f6cfd92cf379a94fe627fea67c7790ee4f35084a27d1ed55. 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 File information Comments

SHA256 hash: 8160be5c40028ff2f6cfd92cf379a94fe627fea67c7790ee4f35084a27d1ed55
SHA3-384 hash: 35675068bf3e373cc9e8970fae5f6196fa351095cf8a4d5e7636188c731154f44eb3ace9a6932c519e9407725351787a
SHA1 hash: bbffcb0e61221ec1d9740511e42f4586f27e8e40
MD5 hash: 92785d162903d76eefa7719e29a4c53e
humanhash: eighteen-nuts-vermont-lamp
File name:POC0000302025.js
Download: download sample
Signature Formbook
File size:135'102 bytes
First seen:2025-05-13 08:15:58 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 768:UGkmP4/44p3rBpHmwd0O7aqBfri7/hLpgtr7X:O
Threatray 46 similar samples on MalwareBazaar
TLSH T160D333527CA9DE0C257A804028AABC7D3F37ED825212DEFF50A04B752355F5BF365A28
Magika javascript
Reporter abuse_ch
Tags:FormBook js

Intelligence


File Origin
# of uploads :
1
# of downloads :
444
Origin country :
NL NL
Vendor Threat Intelligence
Verdict:
Malicious
Score:
94.9%
Tags:
obfuscate xtreme shell
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 evasive obfuscated overlay powershell
Verdict:
Malicious
Labled as:
SVM:TrojanDownloader/JS.Nemucod
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
Found direct / indirect Syscall (likely to bypass EDR)
Found Tor onion address
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
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
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Net WebClient Casing Anomalies
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
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
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:
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1688702 Sample: POC0000302025.js Startdate: 13/05/2025 Architecture: WINDOWS Score: 100 46 www.openlocker.xyz 2->46 48 www.quvy.site 2->48 50 12 other IPs or domains 2->50 66 Suricata IDS alerts for network traffic 2->66 68 Malicious sample detected (through community Yara rule) 2->68 70 Multi AV Scanner detection for submitted file 2->70 74 10 other signatures 2->74 11 wscript.exe 1 1 2->11         started        14 svchost.exe 1 1 2->14         started        signatures3 72 Performs DNS queries to domains with low reputation 46->72 process4 dnsIp5 80 JScript performs obfuscated calls to suspicious functions 11->80 82 Suspicious powershell command line found 11->82 84 Wscript starts Powershell (via cmd or directly) 11->84 86 2 other signatures 11->86 17 powershell.exe 14 15 11->17         started        58 127.0.0.1 unknown unknown 14->58 signatures6 process7 dnsIp8 40 ia600801.us.archive.org 207.241.227.151, 443, 49699 INTERNET-ARCHIVEUS United States 17->40 42 pub-ee582455809e427681c0d15d9645b5cc.r2.dev 172.66.0.235, 443, 49700 CLOUDFLARENETUS United States 17->42 44 archive.org 207.241.224.2, 443, 49698 INTERNET-ARCHIVEUS United States 17->44 60 Found Tor onion address 17->60 62 Writes to foreign memory regions 17->62 64 Injects a PE file into a foreign processes 17->64 21 MSBuild.exe 17->21         started        24 conhost.exe 17->24         started        26 MSBuild.exe 17->26         started        signatures9 process10 signatures11 78 Maps a DLL or memory area into another process 21->78 28 vManGBWEXJ.exe 21->28 injected process12 signatures13 88 Maps a DLL or memory area into another process 28->88 90 Found direct / indirect Syscall (likely to bypass EDR) 28->90 31 RMActivate.exe 13 28->31         started        process14 signatures15 92 Tries to steal Mail credentials (via file / registry access) 31->92 94 Tries to harvest and steal browser information (history, passwords, etc) 31->94 96 Modifies the context of a thread in another process (thread injection) 31->96 98 3 other signatures 31->98 34 vManGBWEXJ.exe 31->34 injected 38 firefox.exe 31->38         started        process16 dnsIp17 52 jz917.top 15.197.225.128, 49713, 49714, 49715 TANDEMUS United States 34->52 54 dewa212vipgo.boats 63.250.42.190, 49712, 80 NAMECHEAP-NETUS United States 34->54 56 3 other IPs or domains 34->56 76 Found direct / indirect Syscall (likely to bypass EDR) 34->76 signatures18
Threat name:
Script-JS.Trojan.AgentTesla
Status:
Malicious
First seen:
2025-05-12 13:02:08 UTC
File Type:
Binary
AV detection:
11 of 37 (29.73%)
Threat level:
  5/5
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
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.

Comments