MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bb3d1286bb2b5bc25e0818fca4a7d4f18e0a818cf543dd7819ca99937f7966df. 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

njrat

Vendor detections: 17

Intelligence 17 IOCs YARA 16 File information Comments

SHA256 hash:	bb3d1286bb2b5bc25e0818fca4a7d4f18e0a818cf543dd7819ca99937f7966df
SHA3-384 hash:	5353678b2e0103b732048ca18860ed5b76500c11ed817cf9a4b772fe5fb473ce749922ce12688c327af4f2213aaa8e39
SHA1 hash:	4d94fe4fc00e52703fbe15d18e85998f6a92e053
MD5 hash:	5e70c383a38d3ecc7d779bc76e61753f
humanhash:	bulldog-mountain-nevada-iowa
File name:	Startup.exe
Download:	download sample
Signature	njrat Create hunting rule
File size:	41'984 bytes
First seen:	2025-03-28 19:39:00 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (49'242 x AgentTesla, 20'499 x Formbook, 12'374 x SnakeKeylogger)
ssdeep	768:TcAz60wqEL3OixHL1s7LZy69wF19j5Q6EO9h0LV:TcAz60K/xHLG7LZaF19j5Q6EO9EV
TLSH	T1D3133B0877D04B15D5FEAFB01A72B5410675F90BE913E74E0CE498DA2B27AC08E52BE7
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
Reporter	BastianHein
Tags:	exe NjRAT

Intelligence

File Origin

# of uploads :

# of downloads :

425

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Startup.exe

Verdict:

Malicious activity

Analysis date:

2025-03-28 13:03:26 UTC

Tags:

stealer xworm

Link:

https://app.any.run/tasks/548f71ca-3cc3-4517-876b-e6ee18655151

Note:

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

Detection(s):

Win.Packed.njRAT-10002074-1

Win.Packed.Msilzilla-10019837-0

Win.Packed.Loveletter-10023052-0

Win.Dropper.Nanocore-10024427-0

Win.Packed.Loveletter-10024677-0

Win.Packed.Msilzilla-10026193-0

Win.Packed.Msilzilla-10026194-0

ditekSHen.MALWARE.Win.Trojan.AsyncRAT.UNOFFICIAL

ditekSHen.MALWARE.Win.XWorm.UNOFFICIAL

Verdict:

Malicious

Score:

97.4%

Link:

https://cyber-fortress.com/docs/result/index.php?id=67e69e1d855e5ec524092cec

Tags:

asyncrat autorun

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Сreating synchronization primitives

Using the Windows Management Instrumentation requests

Creating a process with a hidden window

Creating a file in the %AppData% directory

Enabling the 'hidden' option for recently created files

Adding an access-denied ACE

Creating a file in the %AppData% subdirectories

Connection attempt

Creating a window

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

Creating a file in the mass storage device

Adding an exclusion to Microsoft Defender

Enabling threat expansion on mass storage devices

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm asyncrat backdoor cmd explorer fingerprint lolbin njrat obfuscated packed packer_detected rat reconnaissance vbnet xworm

Link:

https://www.filescan.io/uploads/67e6fae66a150b67eec84211/reports/39170582-1d42-42b2-92e2-c3be89246599/overview

Verdict:

Malicious

Labled as:

Genie.8DN.Generic

Link:

https://www.hybrid-analysis.com/sample/bb3d1286bb2b5bc25e0818fca4a7d4f18e0a818cf543dd7819ca99937f7966df

Malware family:

XWorm

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/e258466c-1d14-4728-be4f-c52e0712d2b7

Result

Threat name:

StormKitty, SugarDump, XWorm

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1651456

Signature

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

.NET source code contains potential unpacker

Adds a directory exclusion to Windows Defender

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

Bypasses PowerShell execution policy

C2 URLs / IPs found in malware configuration

Contains functionality to capture screen (.Net source)

Found malware configuration

Joe Sandbox ML detected suspicious sample

Loading BitLocker PowerShell Module

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

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: Powershell Base64 Encoded MpPreference Cmdlet

Suricata IDS alerts for network traffic

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

Yara detected BrowserPasswordDump

Yara detected StormKitty Stealer

Yara detected SugarDump

Yara detected XWorm

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/bb3d1286bb2b5bc25e0818fca4a7d4f18e0a818cf543dd7819ca99937f7966df

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/bb3d1286bb2b5bc25e0818fca4a7d4f18e0a818cf543dd7819ca99937f7966df/

Threat name:

ByteCode-MSIL.Spyware.AsyncRAT

Status:

Malicious

First seen:

2025-03-26 01:50:00 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

30 of 36 (83.33%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=xm6rfbv3fnn4exqidd6kjj6u6ghavamm6vb526azzkmzg73zm3pq._file

Verdict:

malicious

Label(s):

xworm

stormkitty

Similar samples:

error

njrat

Result

Malware family:

xworm

Score:

10/10

Tags:

family:stormkitty family:xworm credential_access discovery execution persistence rat spyware stealer trojan

Link:

https://tria.ge/reports/250328-yc375ssk14/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Browser Information Discovery

Enumerates physical storage devices

Adds Run key to start application

Checks computer location settings

Credentials from Password Stores: Windows Credential Manager

Drops startup file

Executes dropped EXE

Reads user/profile data of web browsers

Command and Scripting Interpreter: PowerShell

Detect Xworm Payload

StormKitty

StormKitty payload

Stormkitty family

Xworm

Xworm family

Verdict:

Malicious

Tags:

rat xworm Win.Packed.njRAT-10002074-1

YARA:

win_mal_XWorm MALWARE_Win_XWorm

Link:

https://app.threat.zone/submission/e3e2d30b-7214-4fcc-a626-8e23bfe5a5ab

Unpacked files

SH256 hash:

bb3d1286bb2b5bc25e0818fca4a7d4f18e0a818cf543dd7819ca99937f7966df

MD5 hash:

5e70c383a38d3ecc7d779bc76e61753f

SHA1 hash:

4d94fe4fc00e52703fbe15d18e85998f6a92e053

Detections:

win_xworm_w0

XWorm

Link:

https://www.unpac.me/results/522d49f7-aa0e-40a9-ab47-09f88af57004/

Malware family:

XWorm

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/bb3d1286bb2b/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/bb3d1286bb2b5bc25e0818fca4a7d4f18e0a818cf543dd7819ca99937f7966df

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:	Disable_Defender Create hunting rule
Author:	iam-py-test
Description:	Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen

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

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_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.

No further information available

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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