MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c89625e4304d4708308a8a4138af28b90d490e8bd29ccdf3bc1f567d9644a7d7. 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 24 File information Comments 2

SHA256 hash:	c89625e4304d4708308a8a4138af28b90d490e8bd29ccdf3bc1f567d9644a7d7
SHA3-384 hash:	6f1fd160467c33a0bdeaeea792f11d159751f8bcdfa861e48266985bf54f15b8192213578f3b3474e4268bc5a8a78ad9
SHA1 hash:	170c49a1115624e8fc5cafe7c33f76e54cf31c7a
MD5 hash:	493ac3e54bae1f0d5a31b68348352f6c
humanhash:	pasta-lemon-pluto-colorado
File name:	KrnlSetup.exe
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	89'600 bytes
First seen:	2024-12-10 09:02:28 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'853 x AgentTesla, 19'780 x Formbook, 12'304 x SnakeKeylogger)
ssdeep	1536:joG1/tjFDlZvSjvSr4wMiwTlVr6sQOvtbw++0W/QaIOAVg6h55OA34MKq5:joGjJD7EvBw7Y16sXvtbw+88OK5OA34C
TLSH	T1EC937C1837F90525E2FF9FB00DF57696CA75F6632A03D25F108A018A1713A88CE917FA
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	lontze7
Tags:	exe xworm

Intelligence

File Origin

# of uploads :

# of downloads :

502

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

KrnlSetup.exe

Verdict:

Malicious activity

Analysis date:

2024-12-10 09:06:38 UTC

Tags:

evasion pastebin telegram xworm remote ims-api generic

Link:

https://app.any.run/tasks/2d644eeb-0052-46e6-bfc2-2d191d5284f9

Note:

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

Verdict:

Malicious

Score:

94.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6758040b48182d1685578487

Tags:

asyncrat dropper micro remo

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Сreating synchronization primitives

Using the Windows Management Instrumentation requests

DNS request

Connection attempt

Sending an HTTP GET request

Creating a process with a hidden window

Launching a process

Adding an exclusion to Microsoft Defender

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm cmd explorer fingerprint hook lolbin obfuscated schtasks vbnet

Link:

https://www.filescan.io/uploads/675803c85194a7f476f5245b/reports/a7110740-5902-4935-b494-2e74a71b21b7/overview

Verdict:

Malicious

Labled as:

Jalapeno.Generic

Link:

https://www.hybrid-analysis.com/sample/c89625e4304d4708308a8a4138af28b90d490e8bd29ccdf3bc1f567d9644a7d7

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/346a70b3-aef0-461a-a5ba-a08e85cbce7a

Result

Threat name:

XWorm

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1572248

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

Check if machine is in data center or colocation facility

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

Contains functionality to capture screen (.Net source)

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

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

Sigma detected: System File Execution Location Anomaly

Suricata IDS alerts for network traffic

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

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

Uses the Telegram API (likely for C&C communication)

Yara detected Generic Downloader

Yara detected Telegram RAT

Yara detected Telegram Recon

Yara detected XWorm

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/c89625e4304d4708308a8a4138af28b90d490e8bd29ccdf3bc1f567d9644a7d7

Detection:

shortloader

Link:

https://mwdb.cert.pl/sample/c89625e4304d4708308a8a4138af28b90d490e8bd29ccdf3bc1f567d9644a7d7/

Threat name:

Win32.Exploit.Xworm

Status:

Malicious

First seen:

2024-12-10 09:03:04 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

20 of 24 (83.33%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=zclclzbqjvdqqmekrjatrlzixegusdul2kom3454d5lh3fseu7lq._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/241210-kz1hwasjbz/

Behaviour

Delays execution with timeout.exe

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

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

Checks computer location settings

Deletes itself

Drops startup file

Command and Scripting Interpreter: PowerShell

Detect Xworm Payload

Xworm

Xworm family

Verdict:

Malicious

Tags:

rat xworm External_IP_Lookup Win.Packed.njRAT-10002074-1

YARA:

win_mal_XWorm EXE_RAT_XWorm_April2024 MALWARE_Win_XWorm win_xworm_bytestring win_xworm_simple_strings

Link:

https://app.threat.zone/submission/3e07ff81-5a95-412b-869e-fc2fba38cad4

Unpacked files

SH256 hash:

c89625e4304d4708308a8a4138af28b90d490e8bd29ccdf3bc1f567d9644a7d7

MD5 hash:

493ac3e54bae1f0d5a31b68348352f6c

SHA1 hash:

170c49a1115624e8fc5cafe7c33f76e54cf31c7a

Detections:

XWorm

win_xworm_w0

Link:

https://www.unpac.me/results/a0b418ae-cd9a-4d7d-b9cd-43ca633b87e1/

Malware family:

XWorm

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/c89625e4304d/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/c89625e4304d4708308a8a4138af28b90d490e8bd29ccdf3bc1f567d9644a7d7

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

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:	INDICATOR_SUSPICIOUS_EXE_TelegramChatBot Create hunting rule
Author:	ditekSHen
Description:	Detects executables using Telegram Chat Bot

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:	RansomPyShield_Antiransomware Create hunting rule
Author:	XiAnzheng
Description:	Check for Suspicious String and Import combination that Ransomware mostly abuse(can create FP)

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:	telegram_bot_api Create hunting rule
Author:	rectifyq
Description:	Detects file containing Telegram Bot API

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

Rule name:	win_xworm_simple_strings Create hunting rule
Author:	Matthew @ Embee_Research
Description:	Detects simple strings 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:	ditekSHen
Description:	Detects XWorm

Rule name:	xworm Create hunting rule
Author:	jeFF0Falltrades

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.

Web download

AsyncRAT

exe c89625e4304d4708308a8a4138af28b90d490e8bd29ccdf3bc1f567d9644a7d7

(this sample)

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/3340045/

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

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Kasibe commented on 2024-12-10 09:42:49 UTC

Xworm

commented on 2024-12-10 09:05:45 UTC

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

{
"sha256": "c89625e4304d4708308a8a4138af28b90d490e8bd29ccdf3bc1f567d9644a7d7",
"yara_possible_family": "xworm",
"key": "5e8e4533aef182d53b1bb07a9113b25e8e4533aef182d53b1bb07a9113b26c00",
"salt": "None",
"config": {
"JbvJ6xv0FVcxuChjJ7QXjDMxvQ6YDf2m0": 3,
"YZy9mlNIISQ5AIrFaxPQMcwVqxOg85rnY": "https://pastebin.com/raw/5FinF5Mf",
"VZqaUTpyJP1QEyzwtq6vJz1rjboWx0Ebl": "<123456789>",
"337gb0bcRj1Fe4BRfkLfiIOoAuIUBiiuV": "<Xwormmm>",
"rydXYVPGDbXAbM2sfafR5TmfPqb9os8Lx": "niggereezzzz",
"EgnZ3IRDCto6d37fRsY2DLNzfNJqym3xG": "drivers.exe",
"NRqnTCInf2e3edKV5UEnOu565npzzrPx9": "%ProgramData%",
"kd2UvNAUunu4KMDpJh0bftK1qrq6fxJw9": "ntoskrnl.exe",
"tjs5jQIwkGDNlmcN5i3PPq4l1JheJawIF": "wS095JlWNJZxtKC9",
"6B9v0uJt6Xs4299GIvS7ASk9wf9QA9T3W": "6521061783:AAGQkZDgpgjXOESj9-XTf5_ylzpA9XFxUw8",
"fI14VNStejfQvR6klOFcOrkVnZ74StszT": "5999137434"
}
}