MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 33dbb7d0c78bfa2e124b78409ecc7152a80016bbcccf39e960a2790d1efb8a22. 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 22 File information Comments

SHA256 hash:	33dbb7d0c78bfa2e124b78409ecc7152a80016bbcccf39e960a2790d1efb8a22
SHA3-384 hash:	591b98e6c69c12d3d2f4c281719d46a0256b0e6e7b13e84902631e573790781d95b2f92cc987def6b64a74908c7a6689
SHA1 hash:	a302e6d2cb4e97fcdd352ac51606583b748d4f82
MD5 hash:	93d2a83d9b1440fd27d7722fe6aeafc2
humanhash:	blossom-bacon-summer-xray
File name:	103_ETT177321458.JS
Download:	download sample
Signature	Formbook Create hunting rule
File size:	3'867'537 bytes
First seen:	2026-10-09 14:59:07 UTC
Last seen:	Never
File type:	js
MIME type:	application/javascript
ssdeep	98304:jJo8tAZz9IsWLx52IGabKH1kjKRCnfFfW4oKKHIknP61vLgRV9iX:3Gb1keofFfW4ozPZVM
TLSH	T15B068278001C67A06A2D562DE7137B44C73A546F2B3378EC37B831E6A7E1B157BEA049
Magika	txt
Reporter	abuse_ch
Tags:	FormBook js

Intelligence

File Origin

# of uploads :

# of downloads :

172

Origin country :

Vendor Threat Intelligence

No detections

Detection(s):

SecuriteInfo.com.Other.Malware-gen.23873412.UNOFFICIAL

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-debug dropper evasive obfuscated obfuscated packed repaired

Link:

https://www.filescan.io/uploads/6ac9014603d112694f120ba0/reports/d5f54b36-d970-463a-bf07-ea1aca83cf70/overview

Verdict:

Malicious

Labled as:

Trojan.Cryxos.JS

Link:

https://www.hybrid-analysis.com/sample/33dbb7d0c78bfa2e124b78409ecc7152a80016bbcccf39e960a2790d1efb8a22

Verdict:

Malicious

File Type:

First seen:

2026-10-09T03:56:00Z UTC

Last seen:

2026-10-10T13:09:00Z UTC

Hits:

~1000

Link:

https://opentip.kaspersky.com/33dbb7d0c78bfa2e124b78409ecc7152a80016bbcccf39e960a2790d1efb8a22/results?tab=lookup

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1984905

Signature

Found API chain indicative of debugger detection

Found direct / indirect Syscall (likely to bypass EDR)

JavaScript source code contains call to eval() to check own source code (likely for evading instrumentation)

JavaScript source code contains functionality to generate code involving a shell, file or stream

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

Queues an APC in another process (thread injection)

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)

Unusual module load detection (module proxying)

Windows Scripting host queries suspicious COM object (likely to drop second stage)

WScript reads language and country specific registry keys (likely country aware script)

Yara detected FormBook

Behaviour

Behavior Graph:

Download SVG

Score:

99%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/33dbb7d0c78bfa2e124b78409ecc7152a80016bbcccf39e960a2790d1efb8a22

Gathering data

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/33dbb7d0c78bfa2e124b78409ecc7152a80016bbcccf39e960a2790d1efb8a22/

Threat name:

Script-JS.Trojan.Cryxos

Status:

Malicious

First seen:

2026-10-09 12:55:27 UTC

File Type:

Binary

AV detection:

8 of 24 (33.33%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=gpn3pughrp5c4eslpbaj5tdrkkuaafv3zthtt2lauj4q2hx3rira._file

Verdict:

malicious

Label(s):

Formbook

Link:

https://reports.threatray.com/bf5d407c-ec19-4359-b315-bba392f18bed

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook execution rat spyware stealer trojan

Link:

https://tria.ge/reports/261009-scx38sy15n/

Behaviour

Modifies registry class

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Command and Scripting Interpreter: JavaScript

Enumerates physical storage devices

Checks computer location settings

Executes dropped EXE

Family: Formbook

Formbook payload

Please note that we are no longer able to provide a coverage score for Virus Total.

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:	MULTI_Malware_AgentTesla_ForgeAuto_ed343f78_Extrait Create hunting rule
Author:	Marjoriefort
Description:	Detects AgentTesla (inconnu, etat extrait)

Rule name:	pe_no_import_table Create hunting rule
Description:	Detect pe file that no import table

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/

Rule name:	WIN_Malware_SalatStealer_ForgeAuto_542e717b Create hunting rule
Author:	Marjoriefort
Description:	Detects SalatStealer (pe, etat binaire)

Rule name:	WIN_Malware_Sliver_ForgeAuto_2ddb463c Create hunting rule
Author:	Marjoriefort
Description:	Detects Sliver (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_2ffc3572 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_5001c94c Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_ce8c5b46 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_ValleyRAT_ForgeAuto_401c5e16 Create hunting rule
Author:	Marjoriefort
Description:	Detects ValleyRAT (pe, etat binaire)

File information

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

No further information available

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