MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 49ff687dbb13ed84815f3f57c660a0a4fc5cb21c82b605ce53338538a864586d. 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 23 File information Comments

SHA256 hash:	49ff687dbb13ed84815f3f57c660a0a4fc5cb21c82b605ce53338538a864586d
SHA3-384 hash:	f34393c65998b51a25c5b17c217160f45ef3dffc056bd231d4ac6a25908c5cb022a1b15d55f859236d3c86c3607850a2
SHA1 hash:	3a0e314b7bbdf5467df8b92a348c1b464fd502b0
MD5 hash:	fcfae4fdcc273f8a46c51d49fa8a4a03
humanhash:	illinois-berlin-washington-ceiling
File name:	spoolsv.exe
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	138'752 bytes
First seen:	2024-12-08 14:05:25 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep	3072:pG+KeZW7bSWaWDbkDOrZBRHQbPRyZ2pPYU:pU17buWDbkiBR8AZ2
TLSH	T133D3BE18B3D64118E0BF5FB15CF676669A74FE635A02C61F20C5378F2E33A858C416EA
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	6960e896228a6968 (3 x CoinMiner, 2 x AsyncRAT, 1 x RaccoonStealer)
Reporter	aachum
Tags:	exe NoCry RedLineStealer StormKitty xworm

iamaachum

l3monrat.com/spoolsv.exe

XWorm C2: 78.70.235.238:7000
f8terat.ddns.net:7000
https://api.telegram.org/bot7742194912:AAGSH51C4BpkbbvEQlO-cv-lDoJZMVxqyN4/sendMessage?chat_id=5456205643

Intelligence

File Origin

# of uploads :

# of downloads :

408

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

spoolsv.exe

Verdict:

Malicious activity

Analysis date:

2024-12-08 14:06:40 UTC

Tags:

evasion telegram xworm ims-api generic remote ransomware

Link:

https://app.any.run/tasks/d40f52c7-a6c9-43fa-aa83-cca05ea1f435

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=6755a7cbfca9c44c249758ae

Tags:

asyncrat autorun

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 process with a hidden window

Launching a process

Creating a window

Adding an exclusion to Microsoft Defender

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

adaptive-context anti-vm asyncrat backdoor cmd explorer fingerprint hook keylogger lolbin njrat obfuscated rat schtasks vbnet

Link:

https://www.filescan.io/uploads/6755a7cc0e0a7ef3cfc31791/reports/e746b219-acec-45a3-9933-52aa1e48b6e1/overview

Verdict:

Malicious

Labled as:

MSIL.Krypt..Generic

Link:

https://www.hybrid-analysis.com/sample/49ff687dbb13ed84815f3f57c660a0a4fc5cb21c82b605ce53338538a864586d

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/24618bce-a29f-48b6-9cfc-0772b3d93569

Result

Threat name:

RedLine, StormKitty, XWorm

Detection:

malicious

Classification:

rans.troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1570972

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

Bypasses PowerShell execution policy

C2 URLs / IPs found in malware configuration

Check if machine is in data center or colocation facility

Found malware configuration

Found many strings related to Crypto-Wallets (likely being stolen)

Loading BitLocker PowerShell Module

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Protects its processes via BreakOnTermination flag

Queries sensitive disk information (via WMI, Win32_DiskDrive, 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: Files With System Process Name In Unsuspected Locations

Sigma detected: New RUN Key Pointing to Suspicious Folder

Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet

Sigma detected: Schedule system process

Sigma detected: Script Interpreter Execution From Suspicious Folder

Sigma detected: Suspicious Script Execution From Temp Folder

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)

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

Tries to steal Crypto Currency Wallets

Uses dynamic DNS services

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

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

Writes many files with high entropy

Yara detected AntiVM3

Yara detected Generic Downloader

Yara detected RedLine Stealer

Yara detected StormKitty Stealer

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/49ff687dbb13ed84815f3f57c660a0a4fc5cb21c82b605ce53338538a864586d

Detection:

shortloader

Link:

https://mwdb.cert.pl/sample/49ff687dbb13ed84815f3f57c660a0a4fc5cb21c82b605ce53338538a864586d/

Threat name:

ByteCode-MSIL.Spyware.AsyncRAT

Status:

Malicious

First seen:

2024-11-19 01:38:09 UTC

AV detection:

21 of 24 (87.50%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=jh7wq7n3cpwyjak7h5l4myfaut6fzmq4qk3altstgoctrkdelbwq._file

Verdict:

malicious

Label(s):

xworm

Similar samples:

error

AsyncRAT

Result

Malware family:

xworm

Score:

10/10

Tags:

family:xworm discovery execution persistence ransomware rat trojan

Link:

https://tria.ge/reports/241208-redxpsvrhy/

Behaviour

Enumerates system info in registry

Modifies Internet Explorer settings

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Browser Information Discovery

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Sets desktop wallpaper using registry

Adds Run key to start application

Looks up external IP address via web service

Checks computer location settings

Drops startup file

Command and Scripting Interpreter: PowerShell

Detect Xworm Payload

Xworm

Xworm family

Malware Config

C2 Extraction:

78.70.235.238:7000
f8terat.ddns.net:7000

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/1a6fdd67-f4ed-4b0d-9102-562f60fc9a53

Unpacked files

SH256 hash:

49ff687dbb13ed84815f3f57c660a0a4fc5cb21c82b605ce53338538a864586d

MD5 hash:

fcfae4fdcc273f8a46c51d49fa8a4a03

SHA1 hash:

3a0e314b7bbdf5467df8b92a348c1b464fd502b0

Detections:

XWorm

win_xworm_w0

INDICATOR_SUSPICIOUS_EXE_TelegramChatBot

MALWARE_Win_XWorm

win_xworm_simple_strings

win_mal_XWorm

INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

win_xworm_bytestring

MALWARE_Win_AsyncRAT

Link:

https://www.unpac.me/results/617ae437-1d37-4135-be7d-cb00d3e1e20b/

Malware family:

XWorm

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/49ff687dbb13/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

SNC

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/49ff687dbb13ed84815f3f57c660a0a4fc5cb21c82b605ce53338538a864586d

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:	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 49ff687dbb13ed84815f3f57c660a0a4fc5cb21c82b605ce53338538a864586d

(this sample)

Link

https://tria.ge/241208-rcrqsavre1/static1

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/3336991/

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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