MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 42a96a71d61fa31676c36a5e036d87dde899e1197a45c48833b4bfb4770feb01. 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: 18

Intelligence 18 IOCs YARA 15 File information Comments 2

SHA256 hash:	42a96a71d61fa31676c36a5e036d87dde899e1197a45c48833b4bfb4770feb01
SHA3-384 hash:	cd56b71aa6b0316acf4dae37448d4bc785377b34b25a4a325a094b1ffff30d51370dfa9ac36520ca73290653e27c2c29
SHA1 hash:	37080e506a8b1409ed692434dc010a2fd5596078
MD5 hash:	6f2933da19f4b614e6c8df1b924bfaad
humanhash:	mirror-quebec-wyoming-california
File name:	Nurcraft.exe
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	141'824 bytes
First seen:	2024-10-27 17:26:19 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep	3072:1S+h9PGWAIFY9KiFOps83Bz65/M6If+3Js+3JFkKeTnq:1/PlY9axBt25
TLSH	T15AD30742B640C2E1E57C4B73E166E5F10F327C1BEB1A691F2584FB4B39732816D13A6A
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
File icon (PE):
dhash icon	58c8d1d0cecbeeec (18 x AsyncRAT, 9 x XWorm, 6 x QuasarRAT)
Reporter	Anonymous
Tags:	AsyncRAT exe

Intelligence

File Origin

# of uploads :

# of downloads :

384

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Nurcraft.exe

Verdict:

Malicious activity

Analysis date:

2024-10-27 17:25:46 UTC

Tags:

xworm remote

Link:

https://app.any.run/tasks/abc52d19-b65e-4974-b608-3b461024f3ad

Note:

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

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=671e77ea5928ee28d55e6fbc

Tags:

Powershell Asyncrat Autorun Gumen

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

Creating a process with a hidden window

Creating a file in the %AppData% directory

Launching a process

Creating a window

Enabling the 'hidden' option for recently created files

Connection attempt to an infection source

Using the Windows Management Instrumentation requests

Sending a TCP request to an infection source

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

Creating a file in the mass storage device

Query of malicious DNS domain

Adding an exclusion to Microsoft Defender

Enabling autorun by creating a file

Enabling threat expansion on mass storage devices

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm asyncrat backdoor cmd explorer lolbin lolbin njrat packed packer_detected rat schtasks schtasks vbnet

Link:

https://www.filescan.io/uploads/671e77e71856d16cb60e81b2/reports/30607e57-dbce-48f5-886f-2aa07613d0fd/overview

Verdict:

Malicious

Labled as:

Jalapeno.Generic

Link:

https://www.hybrid-analysis.com/sample/42a96a71d61fa31676c36a5e036d87dde899e1197a45c48833b4bfb4770feb01

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Malware family:

XWorm

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/2f5fc479-94df-4563-98d3-fcad0c93b450

Result

Threat name:

XWorm

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1543351

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

AI detected suspicious sample

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

Bypasses PowerShell execution policy

C2 URLs / IPs found in malware configuration

Found malware configuration

Loading BitLocker PowerShell Module

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Protects its processes via BreakOnTermination flag

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

Uses schtasks.exe or at.exe to add and modify task schedules

Yara detected XWorm

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/42a96a71d61fa31676c36a5e036d87dde899e1197a45c48833b4bfb4770feb01

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/42a96a71d61fa31676c36a5e036d87dde899e1197a45c48833b4bfb4770feb01/

Threat name:

ByteCode-MSIL.Backdoor.XWormRAT

Status:

Malicious

First seen:

2024-10-27 17:27:10 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

30 of 38 (78.95%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=ikuwu4owd6rrm5wdnjpag3mh3xujtyizpjc4jcbtws73i5yp5maq._file

Verdict:

malicious

Label(s):

xworm

Similar samples:

error

AsyncRAT

Result

Malware family:

xworm

Score:

10/10

Tags:

family:xworm execution persistence rat trojan

Link:

https://tria.ge/reports/241027-v1eb5sxphw/

Behaviour

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Enumerates physical storage devices

Adds Run key to start application

Checks computer location settings

Drops startup file

Executes dropped EXE

Command and Scripting Interpreter: PowerShell

Detect Xworm Payload

Xworm

Xworm family

Malware Config

C2 Extraction:

takes-sbjct.gl.at.ply.gg:41371

Verdict:

Malicious

Tags:

rat xworm asyncrat asyncrat

YARA:

win_mal_XWorm MALWARE_Win_XWorm

Link:

https://app.threat.zone/submission/9e46e65e-d146-4c6a-af7d-1c399166db3a

Unpacked files

SH256 hash:

42a96a71d61fa31676c36a5e036d87dde899e1197a45c48833b4bfb4770feb01

MD5 hash:

6f2933da19f4b614e6c8df1b924bfaad

SHA1 hash:

37080e506a8b1409ed692434dc010a2fd5596078

Detections:

win_xworm_w0

Link:

https://www.unpac.me/results/6b18364e-15ec-47bd-bfec-f0d97f3974bb/

Malware family:

XWorm

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/42a96a71d61f/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/42a96a71d61fa31676c36a5e036d87dde899e1197a45c48833b4bfb4770feb01

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

File information

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

Web download

AsyncRAT

exe 42a96a71d61fa31676c36a5e036d87dde899e1197a45c48833b4bfb4770feb01

(this sample)

Delivery method

Distributed via web download

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

Comments

Login required

You need to login to in order to write a comment. Login with your abuse.ch account.

commented on 2024-10-30 19:43:49 UTC

RAT King Parser (https://github.com/jeFF0Falltrades/rat_king_parser) Output:

{
"sha256": "42a96a71d61fa31676c36a5e036d87dde899e1197a45c48833b4bfb4770feb01",
"yara_possible_family": "xworm",
"key": "d91afc050d4336e0872bc184d0e23ad91afc050d4336e0872bc184d0e23ad400",
"salt": "None",
"config": {
"Sleep": 3,
"Hosts": "takes-sbjct.gl.at.ply.gg",
"Port": "41371",
"KEY": "<123456789>",
"SPL": "<Xwormmm>",
"Groub": "minecraftcheat1",
"USBNM": "USB.exe",
"InstallDir": "%AppData%",
"InstallStr": "WindowsLogonIN.exe",
"Mutex": "MxqHSXsrqbfmnzhV"
}
}

commented on 2024-10-27 21:46:48 UTC