MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b25b8ca9c790e8030383a0e15562726076f420e38976d4f0b5dadc6ddce2debd. 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: 13


Intelligence 13 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b25b8ca9c790e8030383a0e15562726076f420e38976d4f0b5dadc6ddce2debd
SHA3-384 hash: ed9c0131945de5cdbe02a6c8cb30146dc3d32e606178e50112246b48421e32589c59fcdcb89cb1174766e00ad8358ffe
SHA1 hash: 28c93330141efda43d4ef9bb4afd5202c697d039
MD5 hash: 4bfadec1a00cceecd1e15ef1de185133
humanhash: kentucky-two-nevada-march
File name:34435677825.vbs
Download: download sample
Signature Formbook
Create hunting rule
File size:2'188'987 bytes
First seen:2025-10-22 08:38:51 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 49152:bSe5PoR/ewnHSRvxDh3iE8gLYAVGIrE+Ha+k:0
TLSH T17FA5AEB28CB75EC92F7824CAC5DE7AC43F1C47538528A6906A4FB27F21595017EDC8AC
Magika vba
Reporter lowmal3
Tags:FormBook vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
87
Origin country :
DE DE
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/33711/
Detection(s):
Sanesecurity.Malware.28953.VbsHeur.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.PUA.Base64EXE-1.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68f89855ad6ce0f5ad409971
Tags:
valyria delphi emotet
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug base64 dropper fingerprint keylogger obfuscated obfuscated packed packed
Link:
https://www.filescan.io/uploads/68f898503a79800405f08353/reports/384b1c90-b760-4ef7-8e8b-efcc3e1b127d/overview
Verdict:
Malicious
Labled as:
Valyria
Link:
https://www.hybrid-analysis.com/sample/b25b8ca9c790e8030383a0e15562726076f420e38976d4f0b5dadc6ddce2debd
Verdict:
Malicious
File Type:
vbs
First seen:
2025-10-22T03:33:00Z UTC
Last seen:
2025-10-23T08:43:00Z UTC
Hits:
~100
Detections:
Trojan-Spy.Noon.HTTP.ServerRequest PDM:Trojan.Win32.Generic Backdoor.Agent.HTTP.C&C HEUR:Trojan-Dropper.Script.Generic Trojan-Spy.Win32.Noon.sb Trojan-Dropper.JS.SDrop.sb Trojan-Downloader.JS.Cryptoload.sb HEUR:Trojan.Win32.DelfInject.gen HEUR:Trojan.Script.Generic
Link:
https://opentip.kaspersky.com/b25b8ca9c790e8030383a0e15562726076f420e38976d4f0b5dadc6ddce2debd/results?tab=lookup
Result
Threat name:
DBatLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1799634
Signature
Allocates many large memory junks
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Benign windows process drops PE files
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Detected unpacking (changes PE section rights)
Drops PE files to the user root directory
Joe Sandbox ML detected suspicious sample
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)
Sample uses process hollowing technique
Sigma detected: Execution from Suspicious Folder
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
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)
VBScript performs obfuscated calls to suspicious functions
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Yara detected DBatLoader
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1799634 Sample: 34435677825.vbs Startdate: 22/10/2025 Architecture: WINDOWS Score: 100 42 www.kecertp.xyz 2->42 44 www.dorvian.xyz 2->44 46 9 other IPs or domains 2->46 62 Suricata IDS alerts for network traffic 2->62 64 Antivirus / Scanner detection for submitted sample 2->64 66 Multi AV Scanner detection for submitted file 2->66 70 5 other signatures 2->70 12 wscript.exe 2 2->12         started        signatures3 68 Performs DNS queries to domains with low reputation 44->68 process4 file5 40 C:\Users\user\AppData\Local\Temp\x.exe, PE32 12->40 dropped 86 Benign windows process drops PE files 12->86 88 VBScript performs obfuscated calls to suspicious functions 12->88 90 Windows Scripting host queries suspicious COM object (likely to drop second stage) 12->90 16 x.exe 1 12->16         started        signatures6 process7 file8 38 C:\Users\Public\vfbssovmI.exe, PE32 16->38 dropped 54 Drops PE files to the user root directory 16->54 56 Writes to foreign memory regions 16->56 58 Allocates memory in foreign processes 16->58 60 3 other signatures 16->60 20 vfbssovmI.exe 16->20         started        signatures9 process10 signatures11 72 Detected unpacking (changes PE section rights) 20->72 74 Maps a DLL or memory area into another process 20->74 23 gQZUbJXFIJr.exe 20->23 injected process12 signatures13 76 Maps a DLL or memory area into another process 23->76 26 HOSTNAME.EXE 13 23->26         started        process14 signatures15 78 Tries to steal Mail credentials (via file / registry access) 26->78 80 Tries to harvest and steal browser information (history, passwords, etc) 26->80 82 Modifies the context of a thread in another process (thread injection) 26->82 84 3 other signatures 26->84 29 qDMdnYcIRI0n.exe 26->29 injected 32 chrome.exe 26->32         started        34 firefox.exe 26->34         started        process16 dnsIp17 48 www.dorvian.xyz 203.161.50.154, 49702, 49703, 49704 VNPT-AS-VNVNPTCorpVN Malaysia 29->48 50 kecertp.xyz 67.223.118.73, 49698, 49699, 49700 VIMRO-AS15189US United States 29->50 52 5 other IPs or domains 29->52 36 WerFault.exe 4 32->36         started        process18
Score:
98%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/b25b8ca9c790e8030383a0e15562726076f420e38976d4f0b5dadc6ddce2debd
Verdict:
inconclusive
YARA:
1 match(es)
Link:
https://app.malva.re/file/4bfadec1a00cceecd1e15ef1de185133
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b25b8ca9c790e8030383a0e15562726076f420e38976d4f0b5dadc6ddce2debd/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/b25b8ca9c790e8030383a0e15562726076f420e38976d4f0b5dadc6ddce2debd
Threat name:
Script-WScript.Trojan.Valyria
Create hunting rule
Status:
Malicious
First seen:
2025-10-22 08:39:44 UTC
File Type:
Text
AV detection:
17 of 38 (44.74%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wjnyzkohsduaga4dudqvkytsmb3piihdrf3nj4fv3log3xhc326q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
dbatloader
Create hunting rule
Similar samples:
error
Formbook
Result
Malware family:
modiloader
Create hunting rule
Score:
  10/10
Tags:
family:formbook family:modiloader discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/251022-kkmnga1pak/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Executes dropped EXE
Formbook payload
ModiLoader Second Stage
Formbook
Formbook family
ModiLoader, DBatLoader
Modiloader family
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/b25b8ca9c790e8030383a0e15562726076f420e38976d4f0b5dadc6ddce2debd

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

File information

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

Malspam

Formbook

Visual Basic Script (vbs) vbs b25b8ca9c790e8030383a0e15562726076f420e38976d4f0b5dadc6ddce2debd

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/33711/

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