MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b339b9836e45b4be044cd0e5e120a4577e27dc82ecbc4ecf3258d07d5e927986. 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

AsyncRAT

Vendor detections: 13

Intelligence 13 IOCs YARA 18 File information Comments

SHA256 hash:	b339b9836e45b4be044cd0e5e120a4577e27dc82ecbc4ecf3258d07d5e927986
SHA3-384 hash:	6a542681bbbc8bcf55a861d151f30f52b17d287d277fd1246b032a5aed8188cb00cecaf7c64d3a2424cf0b6e09380081
SHA1 hash:	180356f9f1d05f9f9d99e2bd083637ae4e7bd5c1
MD5 hash:	7801fe25c9c647eb9b86b73193daf5ee
humanhash:	monkey-freddie-summer-white
File name:	DETALLES Y ESPECIFICACIONES DE LA CONSULTA.vbs
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	188'660 bytes
First seen:	2026-10-30 06:12:09 UTC
Last seen:	2026-11-02 07:05:28 UTC
File type:	vbs
MIME type:	text/plain
ssdeep	3072:BNtWCsCOjCZwy1q3PZPbHshndl+/l9asxG44Qn/569lErEz+tw:lRVOjSx6NLshdlYnaeKew
TLSH	T19904F0A32D5976378BC6648D5E10C82F079D11FA93AEB8067D7FA1084FBA07386CD5C9
Magika	txt
Reporter	threatcat_ch
Tags:	AsyncRAT vbs

Intelligence

File Origin

# of uploads :

# of downloads :

394

Origin country :

Vendor Threat Intelligence

No detections

Detection:

XWorm

Link:

https://www.capesandbox.com/analysis/96085/

Detection(s):

SecuriteInfo.com.Script.SNH-gen.75657131.UNOFFICIAL

Verdict:

Malicious

Score:

92.5%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6ae4353eb121dd519dcebd1a

Tags:

infosteal rapid

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm encrypted fingerprint lolbin obfuscated wscript

Link:

https://www.filescan.io/uploads/6ae4354be6b262c8f21989fc/reports/99784469-2fbd-4593-88cc-e5b9235e176b/overview

Verdict:

Malicious

Labled as:

Valyria

Link:

https://www.hybrid-analysis.com/sample/b339b9836e45b4be044cd0e5e120a4577e27dc82ecbc4ecf3258d07d5e927986

Verdict:

Malicious

File Type:

vbs

First seen:

2026-10-29T14:08:00Z UTC

Last seen:

2026-11-01T04:44:00Z UTC

Hits:

~10000

Link:

https://opentip.kaspersky.com/b339b9836e45b4be044cd0e5e120a4577e27dc82ecbc4ecf3258d07d5e927986/results?tab=lookup

Result

Threat name:

AgentTesla, AveMaria, DarkCloud, DarkTor

Detection:

malicious

Classification:

phis.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1995082

Signature

.NET source code contains method to dynamically call methods (often used by packers)

.NET source code contains potential unpacker

AI detected malicious Powershell script

Antivirus detection for dropped file

Bypasses PowerShell execution policy

C2 URLs / IPs found in malware configuration

Connects to many ports of the same IP (likely port scanning)

Contains functionality to hide user accounts

Creates an autostart registry key pointing to binary in C:\Windows

Found malware configuration

Increases the number of concurrent connection per server for Internet Explorer

Injects a PE file into a foreign processes

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Potential malicious VBS script found (has network functionality)

Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)

Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)

Sample uses string decryption to hide its real strings

Sigma detected: Script Interpreter Execution From Suspicious Folder

Sigma detected: Suspicious Script Execution From Temp Folder

Sigma detected: WScript or CScript Dropper

Suricata IDS alerts for network traffic

Suspicious execution chain found

Suspicious powershell command line found

Tries to harvest and steal browser information (history, passwords, etc)

Tries to harvest and steal ftp login credentials

Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)

Tries to steal Mail credentials (via file / registry access)

Uses dynamic DNS services

Uses known network protocols on non-standard ports

VBScript performs obfuscated calls to suspicious functions

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 AgentTesla

Yara detected AntiVM3

Yara detected AveMaria stealer

Yara detected Costura Assembly Loader

Yara detected DarkCloud

Yara detected DarkTortilla Crypter

Yara detected MSIL Injector

Yara detected Telegram RAT

Yara detected UACMe UAC Bypass tool

Yara detected XWorm

Behaviour

Behavior Graph:

Download SVG

Score:

88%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/b339b9836e45b4be044cd0e5e120a4577e27dc82ecbc4ecf3258d07d5e927986

Verdict:

Malware

YARA:

1 match(es)

Tags:

COM Behavior Trace DeObfuscated Obfuscated SOS: 0.24 T1027 T1059.005 VBScript

Link:

https://app.malva.re/file/7801fe25c9c647eb9b86b73193daf5ee

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/b339b9836e45b4be044cd0e5e120a4577e27dc82ecbc4ecf3258d07d5e927986/

Threat name:

Win32.Trojan.Ravartar

Status:

Malicious

First seen:

2026-10-29 22:09:35 UTC

File Type:

Text

AV detection:

12 of 23 (52.17%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=wm43ta3oiw2l4bcm2ds6cifek57cpxec5s6e5tzsldih2xuspgda._file

Result

Malware family:

xworm

Score:

10/10

Tags:

family:agenttesla family:xworm collection costura defense_evasion discovery execution keylogger packer pyinstaller rat spyware stealer trojan upx

Link:

https://tria.ge/reports/261030-gyadhshw8y/

Behaviour

Kills process with taskkill

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

outlook_office_path

Detects Pyinstaller

Enumerates physical storage devices

Reads the TCP/IP host and domain name from the registry

System Location Discovery: System Language Discovery

Costura .NET executable packer

Enumerates video capture drivers

Executes a VBScript file via the Windows Script Host.

Suspicious use of SetThreadContext

UPX packed file

Accesses Microsoft Outlook profiles

.NET Reactor proctector

Checks computer location settings

Executes dropped EXE

Reads WinSCP keys stored on the system

Reads data files stored by FTP clients

Reads user/profile data of local email clients

Reads user/profile data of web browsers

Command and Scripting Interpreter: PowerShell

Detect Xworm Payload

Family: AgentTesla

Family: Xworm

Malware Config

C2 Extraction:

vallxx.duckdns.org:4689

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/b339b9836e45b4be044cd0e5e120a4577e27dc82ecbc4ecf3258d07d5e927986

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:	ByteCode_MSIL_Backdoor_AsyncRAT Create hunting rule
Author:	ReversingLabs
Description:	Yara rule that detects AsyncRAT backdoor.

Rule name:	Detect_PowerShell_Obfuscation Create hunting rule
Author:	daniyyell
Description:	Detects obfuscated PowerShell commands commonly used in malicious scripts.

Rule name:	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA Create hunting rule
Author:	ditekSHen
Description:	Detects Windows executables referencing non-Windows User-Agents

Rule name:	MALWARE_Win_AsyncRAT Create hunting rule
Author:	ditekSHen
Description:	Detects AsyncRAT

Rule name:	MALWARE_Win_XWorm Create hunting rule
Author:	ditekSHen
Description:	Detects XWorm

Rule name:	MAL_AsyncRAT_Family_V_0_5_8 Create hunting rule
Author:	Trezzza
Description:	Detects AsyncRAT version 0.5.8 and some other versions of AsyncRAT. The name reflects the analysed sample.

Rule name:	NETexecutableMicrosoft Create hunting rule
Author:	malware-lu

Rule name:	Njrat Create hunting rule
Author:	botherder https://github.com/botherder
Description:	Njrat

Rule name:	pe_imphash Create hunting rule

Rule name:	rat_win_xworm_v3 Create hunting rule
Author:	Sekoia.io
Description:	Finds XWorm (version XClient, v3) samples based on characteristic strings

Rule name:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

Rule name:	SUSP_DOTNET_PE_List_AV Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detecs .NET Binary that lists installed AVs

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:	VECT_Ransomware Create hunting rule
Author:	Mustafa Bakhit
Description:	Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

Rule name:	WIN_Malware_XWorm_ForgeAuto_6b06c990_Extrait Create hunting rule
Author:	Marjoriefort
Description:	Detects XWorm (pe, etat extrait)

Rule name:	WIN_Sample_Unique_69354b41 Create hunting rule
Author:	Marjoriefort
Description:	Specimen unique (soumission Bazaar) - strings distinctifs propres au sample
Reference:	69354b41e10daf03d3f3af881b32d5c0fec56b1cfe96629fd4c5263413a42854.exe

Rule name:	win_xworm_w0 Create hunting rule
Author:	jeFF0Falltrades
Description:	Detects win.xworm.

Rule name:	xworm Create hunting rule
Author:	jeFF0Falltrades

File information

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

Malspam

AsyncRAT

vbs b339b9836e45b4be044cd0e5e120a4577e27dc82ecbc4ecf3258d07d5e927986

(this sample)

Delivery method

Distributed via e-mail attachment

Cape

https://www.capesandbox.com/analysis/96085/

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