MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b80cb8d6e9a7cbb458cf6eae5bd4cf1631c5dc5892606641b962e41697c67436. 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: 7


Intelligence 7 IOCs YARA 3 File information Comments
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SHA256 hash: b80cb8d6e9a7cbb458cf6eae5bd4cf1631c5dc5892606641b962e41697c67436
SHA3-384 hash: 6b6d8a8590ba7820d634f3773595e37fe6a772a1eec0b825cac1ba57156325183fbeb1b0abaeda3c0e846e02483dcd75
SHA1 hash: 1be89e3264dba15f73540a91ffd2769ae928e820
MD5 hash: 5ee15e94baf8341f2192006a7da389a1
humanhash: venus-alabama-orange-edward
File name:SKM_750i25051513470.js
Download: download sample
Signature Formbook
Create hunting rule
File size:75'608 bytes
First seen:2025-05-23 08:30:09 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 768:XaCmWLbNl7VB2B+TISslNm54MJrBLhn+n5YeWTRitmmfVilPJ+RF3u6q6dEcOfGU:XLoWTR8tWcRF3x56Rfva0QUh2GrsECEh
TLSH T15C73D8D9704FA17F53A32324523F115AEAFDD5192929D8A4F58C89883B2082D93F1DBE
Magika javascript
Reporter abuse_ch
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
466
Origin country :
NL NL
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.26863.JsHeur.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.26444.JsHeur.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.PUA.JS.Downloader-133.UNOFFICIAL
Create hunting rule

Js.Dropper.Divergent-7133099-1
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6830348f4912a6b9dd4c51fa
Tags:
dropper xtreme shell
Verdict:
Malicious
Labled as:
TrojanDownloader/JS.Nemucod
Link:
https://www.hybrid-analysis.com/sample/b80cb8d6e9a7cbb458cf6eae5bd4cf1631c5dc5892606641b962e41697c67436
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1697595
Signature
Connects to a pastebin service (likely for C&C)
Creates autostart registry keys with suspicious values (likely registry only malware)
Injects a PE file into a foreign processes
JavaScript file contains suspicious strings
Javascript file is likely language aware (will only work on specific systems)
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
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: 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: Script Interpreter Execution From Suspicious Folder
Sigma detected: Windows Shell/Scripting Application File Write to Suspicious Folder
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)
Uses whoami command line tool to query computer and username
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:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1697595 Sample: SKM_750i25051513470.js Startdate: 23/05/2025 Architecture: WINDOWS Score: 100 52 www.fabu2024b01.xyz 2->52 54 paste.ee 2->54 56 ia600705.us.archive.org 2->56 64 Suricata IDS alerts for network traffic 2->64 66 Malicious sample detected (through community Yara rule) 2->66 68 Multi AV Scanner detection for submitted file 2->68 74 15 other signatures 2->74 11 wscript.exe 1 1 2->11         started        15 wscript.exe 1 2->15         started        17 wscript.exe 2->17         started        signatures3 70 Performs DNS queries to domains with low reputation 52->70 72 Connects to a pastebin service (likely for C&C) 54->72 process4 dnsIp5 60 paste.ee 23.186.113.60, 443, 49692, 49693 KLAYER-GLOBALNL Reserved 11->60 96 JScript performs obfuscated calls to suspicious functions 11->96 98 Suspicious powershell command line found 11->98 100 Wscript starts Powershell (via cmd or directly) 11->100 104 2 other signatures 11->104 19 powershell.exe 15 16 11->19         started        23 powershell.exe 15->23         started        102 System process connects to network (likely due to code injection or exploit) 17->102 signatures6 process7 dnsIp8 58 ia600705.us.archive.org 207.241.227.165, 443, 49694, 49701 INTERNET-ARCHIVEUS United States 19->58 76 Creates autostart registry keys with suspicious values (likely registry only malware) 19->76 78 Writes to foreign memory regions 19->78 80 Injects a PE file into a foreign processes 19->80 25 AddInProcess32.exe 19->25         started        28 cmd.exe 2 19->28         started        31 conhost.exe 19->31         started        33 conhost.exe 23->33         started        35 AddInProcess32.exe 23->35         started        signatures9 process10 file11 86 Maps a DLL or memory area into another process 25->86 37 QhpSNpjcdTfD0D.exe 25->37 injected 50 C:\Users\Public\Downloads\cartisane.js, Unicode 28->50 dropped 40 conhost.exe 28->40         started        signatures12 process13 signatures14 82 Maps a DLL or memory area into another process 37->82 84 Uses whoami command line tool to query computer and username 37->84 42 whoami.exe 13 37->42         started        process15 signatures16 88 Tries to steal Mail credentials (via file / registry access) 42->88 90 Tries to harvest and steal browser information (history, passwords, etc) 42->90 92 Maps a DLL or memory area into another process 42->92 94 2 other signatures 42->94 45 dTXv32BYotwe.exe 42->45 injected 48 chrome.exe 42->48         started        process17 dnsIp18 62 www.fabu2024b01.xyz 13.248.169.48, 49706, 80 AMAZON-02US United States 45->62
Score:
0%
Verdict:
Benign
File Type:
SCRIPT
Link:
https://malprob.io/report/b80cb8d6e9a7cbb458cf6eae5bd4cf1631c5dc5892606641b962e41697c67436
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b80cb8d6e9a7cbb458cf6eae5bd4cf1631c5dc5892606641b962e41697c67436/
Threat name:
Win32.Dropper.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-05-22 12:14:47 UTC
AV detection:
3 of 38 (7.89%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xaglrvxju7f3iwgpn2xfxvgpcyy4lxcysjqgmqnzmlsbnf6goq3a._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution persistence
Link:
https://tria.ge/reports/250523-kel5rabn8y/
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
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/b80cb8d6e9a7cbb458cf6eae5bd4cf1631c5dc5892606641b962e41697c67436

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:INDICATOR_SUSPICIOUS_JS_WMI_ExecQuery
Create hunting rule
Author:ditekSHen
Description:Detects JS potentially executing WMI queries
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:OBFUS_PowerShell_Common_Replace
Create hunting rule
Author:SECUINFRA Falcon Team
Description:Detects the common usage of replace for obfuscation

File information

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

Comments