MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a1356741bd99e618e22d0dec2d61febd45015ab20d825b0a7e5b7ed3aab0cc38. 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 19 File information Comments

SHA256 hash:	a1356741bd99e618e22d0dec2d61febd45015ab20d825b0a7e5b7ed3aab0cc38
SHA3-384 hash:	aa8b284cee2c907fa51b48d82bda32c784dd90c6c5dc32fbcf93eea087e10b707f5945d24af57e8b9c68ff8493bf3e6a
SHA1 hash:	ec8a410b8dea4e5bf1f30446d2cb4f38289ebeef
MD5 hash:	61bb06bffad8c1a1c18a0f3154cc9b46
humanhash:	item-carolina-king-iowa
File name:	AES_ExportBegleitDokument_21bf6a8f-71c8 CMR Versandpapiere Galeri TR TP 52646.pdf.js
Download:	download sample
Signature	Formbook Create hunting rule
File size:	33'950 bytes
First seen:	2026-09-23 13:52:13 UTC
Last seen:	Never
File type:	js
MIME type:	text/plain
ssdeep	768:B23gp8fSdoEztGTSCWPOnzP/JMGE4vleInSUjHdyKGUdHSVzL7K6GhRT2SyLpMu1:gKN/tGTSG/X+71
TLSH	T1FEE2EE5055927988A373AB7ABB27ACA8FB770A6700948503B87C7444EFF4908CDE4DF5
Magika	javascript
Reporter	lowmal3
Tags:	FormBook js

Intelligence

File Origin

# of uploads :

# of downloads :

167

Origin country :

Vendor Threat Intelligence

No detections

Detection(s):

SecuriteInfo.com.JS.Obfus-2303.UNOFFICIAL

Verdict:

Malicious

Score:

99.1%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6acdacb67378c656ff4d6bf8

Tags:

dwnldr virus shell

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

encrypted evasive masquerade obfuscated opendir powershell repaired

Link:

https://www.filescan.io/uploads/6ab3d9999e369e6ac12e80a4/reports/00c7460c-d59b-4599-8efb-03a0bd2781de/overview

Verdict:

Malicious

Labled as:

SVM:TrojanDownloader/JS.MalBehav.gen

Link:

https://www.hybrid-analysis.com/sample/a1356741bd99e618e22d0dec2d61febd45015ab20d825b0a7e5b7ed3aab0cc38

Verdict:

Malicious

File Type:

First seen:

2026-09-23T02:33:00Z UTC

Last seen:

2026-09-25T11:36:00Z UTC

Hits:

~1000

Link:

https://opentip.kaspersky.com/a1356741bd99e618e22d0dec2d61febd45015ab20d825b0a7e5b7ed3aab0cc38/results?tab=lookup

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1976847

Signature

.NET source code references suspicious native API functions

Bypasses PowerShell execution policy

Found direct / indirect Syscall (likely to bypass EDR)

Injects a PE file into a foreign processes

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

JavaScript source code contains functionality to generate code involving HTTP requests or file downloads

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

Queues an APC in another process (thread injection)

Sigma detected: Script Initiated Connection to Non-Local Network

Sigma detected: Suspicious Parent Double Extension File Execution

Sigma detected: Suspicious PowerShell Parameter Substring

Sigma detected: WScript or CScript Dropper

Suricata IDS alerts for network traffic

Suspicious execution chain 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)

Unusual module load detection (module proxying)

Uses an obfuscated file name to hide its real file extension (double extension)

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 Generic JS Downloader

Yara detected Powershell decode and execute

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/a1356741bd99e618e22d0dec2d61febd45015ab20d825b0a7e5b7ed3aab0cc38

Gathering data

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a1356741bd99e618e22d0dec2d61febd45015ab20d825b0a7e5b7ed3aab0cc38/

Threat name:

Script.Trojan.Cryxos

Status:

Malicious

First seen:

2026-09-23 08:52:10 UTC

File Type:

Text (JavaScript)

AV detection:

9 of 23 (39.13%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=ue2woqn5thtbryrnbxwc2yp6xvcqcwvsbwbfwct6ln7nhkvqzq4a._file

Result

Malware family:

n/a

Score:

8/10

Tags:

execution

Link:

https://tria.ge/reports/260923-q6g8rsvv4p/

Behaviour

Command and Scripting Interpreter: JavaScript

Badlisted process makes network request

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/a1356741bd99e618e22d0dec2d61febd45015ab20d825b0a7e5b7ed3aab0cc38

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:	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:	Suspicious_Process Create hunting rule
Author:	Security Research Team
Description:	Suspicious process creation

Rule name:	SUSP_JS_HexObfuscated_ActiveX_Launcher Create hunting rule
Author:	Marjoriefort
Description:	JS obfusque (identifiants _0x) instanciant ActiveX sous WScript - dropper JScript frais
Reference:	Veille fraicheur 2026-09-14 / cluster JS _0x

Rule name:	SUSP_obfuscated_JS_obfuscatorio Create hunting rule
Author:	@imp0rtp3
Description:	Detect JS obfuscation done by the js obfuscator (often malicious)
Reference:	https://obfuscator.io

Rule name:	Sus_CMD_Powershell_Usage Create hunting rule
Author:	XiAnzheng
Description:	May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

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.

No further information available

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