MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ab4e3ac934689f76e8b891a7a65fbe9b9c942cb77557f10e569ce43298620801. 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: 19

Intelligence 19 IOCs YARA 17 File information Comments

SHA256 hash:	ab4e3ac934689f76e8b891a7a65fbe9b9c942cb77557f10e569ce43298620801
SHA3-384 hash:	1a063a049cec6be1ce9c77bbf93ec51a7fc2d4f111b6e3c4efe08d82b437f4b0b31517c237fabd8d1084662052ba04e3
SHA1 hash:	a0ec76acc8bbc612413f82506d4f6ff7621142d5
MD5 hash:	940afbf66dd29a1895db01cf1ee82442
humanhash:	oklahoma-robert-foxtrot-violet
File name:	Viewbot_cursusV9.2.exe
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	176'128 bytes
First seen:	2025-05-28 21:33:06 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'610 x Formbook, 12'242 x SnakeKeylogger)
ssdeep	3072:qOUKPu8bvbgMG34VYOxr/4Bz65/M6If+3Js+3JFkKeTnF:qOvuuvbs34VYxBt25
TLSH	T189046B42B791C2A1E47D4A73D4A6E5F10F327C1BEF0AA51F3484BB4B3933541AD13A6A
TrID	67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 9.7% (.EXE) Win64 Executable (generic) (10522/11/4) 6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika	pebin
dhash icon	58c8d1d0cecbeeec (18 x AsyncRAT, 9 x XWorm, 6 x QuasarRAT)
Reporter	BastianHein
Tags:	AsyncRAT exe

Intelligence

File Origin

# of uploads :

# of downloads :

484

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Viewbot_cursusV9.2.exe

Verdict:

Malicious activity

Analysis date:

2025-05-28 21:55:12 UTC

Tags:

evasion pastebin auto-startup crypto-regex xworm auto-reg

Link:

https://app.any.run/tasks/23f2e59e-962b-4ecc-bd1f-cbb02a757392

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection:

XWorm

Link:

https://www.capesandbox.com/analysis/6107/

Detection(s):

Win.Packed.njRAT-10002074-1

Win.Packed.Msilzilla-10019837-0

Win.Packed.Loveletter-10023052-0

Win.Packed.Loveletter-10024677-0

Win.Packed.Msilzilla-10024808-0

Win.Packed.Msilzilla-10026193-0

Win.Malware.Deepscan-10028866-0

ditekSHen.MALWARE.Win.Trojan.AsyncRAT.UNOFFICIAL

Verdict:

Malicious

Score:

97.4%

Link:

https://cyber-fortress.com/docs/result/index.php?id=683783ca668438e362e7dfc8

Tags:

asyncrat dropper micro remo

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

Using the Windows Management Instrumentation requests

DNS request

Connection attempt

Sending an HTTP GET request

Creating a file in the %AppData% directory

Sending a custom TCP request

Creating a window

Searching for the window

Connection attempt to an infection source

Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch

Setting a global event handler for the keyboard

Query of malicious DNS domain

Enabling autorun by creating a file

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm asyncrat backdoor base64 fingerprint obfuscated obfuscated rat reconnaissance vbnet xworm

Link:

https://www.filescan.io/uploads/683781b9fd02ed5e058d40e2/reports/5f9af9d3-df79-486e-9067-357d92ac9890/overview

Verdict:

Malicious

Labled as:

Dump:Generic.Malware.SFL

Link:

https://www.hybrid-analysis.com/sample/ab4e3ac934689f76e8b891a7a65fbe9b9c942cb77557f10e569ce43298620801

Malware family:

XWorm

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/72621a6d-89a4-40eb-84ca-a8dcbeb17ad6

Result

Threat name:

XWorm

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1701118

Signature

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

.NET source code contains potential unpacker

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

C2 URLs / IPs found in malware configuration

Check if machine is in data center or colocation facility

Connects to a pastebin service (likely for C&C)

Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)

Found malware configuration

Joe Sandbox ML detected suspicious sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Sample uses string decryption to hide its real strings

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Yara detected XWorm

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/ab4e3ac934689f76e8b891a7a65fbe9b9c942cb77557f10e569ce43298620801

Detection:

xworm

Link:

https://mwdb.cert.pl/sample/ab4e3ac934689f76e8b891a7a65fbe9b9c942cb77557f10e569ce43298620801/

Threat name:

ByteCode-MSIL.Spyware.AsyncRAT

Status:

Malicious

First seen:

2025-05-28 07:27:30 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

22 of 24 (91.67%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=vnhdvsjuncpxn2fysgt2mx56toojilfxovl7cdswttsdfgdcbaaq._file

Verdict:

malicious

Label(s):

xworm

Similar samples:

error

AsyncRAT

Result

Malware family:

xworm

Score:

10/10

Tags:

family:xworm persistence rat trojan

Link:

https://tria.ge/reports/250528-1fpv2acl5x/

Behaviour

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Adds Run key to start application

Legitimate hosting services abused for malware hosting/C2

Looks up external IP address via web service

Drops startup file

Executes dropped EXE

Detect Xworm Payload

Xworm

Xworm family

Verdict:

Malicious

Tags:

rat xworm Win.Packed.njRAT-10002074-1

YARA:

EXE_RAT_XWorm_April2024 MALWARE_Win_XWorm win_mal_XWorm win_xworm_bytestring

Link:

https://app.threat.zone/submission/83dded50-5a38-41d4-9168-626d20f0258b

Unpacked files

SH256 hash:

ab4e3ac934689f76e8b891a7a65fbe9b9c942cb77557f10e569ce43298620801

MD5 hash:

940afbf66dd29a1895db01cf1ee82442

SHA1 hash:

a0ec76acc8bbc612413f82506d4f6ff7621142d5

Detections:

win_xworm_w0

Link:

https://www.unpac.me/results/ec5dbaae-caa4-453c-bf4a-a45abb63345c/

Malware family:

XWorm

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/ab4e3ac93468/report/overview.html

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/ab4e3ac934689f76e8b891a7a65fbe9b9c942cb77557f10e569ce43298620801

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:	DebuggerCheck__RemoteAPI Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

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

Rule name:	EXE_RAT_XWorm_April2024 Create hunting rule
Author:	Yashraj Solanki - Cyber Threat Intelligence Analyst at Bridewell

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:	Multifamily_RAT_Detection Create hunting rule
Author:	Lucas Acha (http://www.lukeacha.com)
Description:	Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables

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

Rule name:	pe_imphash Create hunting rule

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:	win_xworm_bytestring Create hunting rule
Author:	Matthew @ Embee_Research
Description:	Detects bytestring present in unobfuscated xworm

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

Rule name:	xworm Create hunting rule
Author:	jeFF0Falltrades

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

Rule name:	xworm_kingrat Create hunting rule
Author:	jeFF0Falltrades

File information

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

Cape

https://www.capesandbox.com/analysis/6107/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high

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