MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 50738407f70e37470182a0da6b44e78eb9cd2be3f7c43e066ea85f92388c79ae. 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

Formbook

Vendor detections: 17

Intelligence 17 IOCs YARA 17 File information Comments

SHA256 hash:	50738407f70e37470182a0da6b44e78eb9cd2be3f7c43e066ea85f92388c79ae
SHA3-384 hash:	8af1609642b7ca6912b40291617663c182cbc224a933993b61c4b478cbf5ba12b62bf20c78ca648533e4d84c81bc1ed3
SHA1 hash:	c7eff0f1d56e71a601cff1e161879ea520886a32
MD5 hash:	d59bcf447ab9a90d1c6e9701d85d5700
humanhash:	cold-salami-quiet-item
File name:	xclient.exe
Download:	download sample
Signature	Formbook Create hunting rule
File size:	117'248 bytes
First seen:	2024-09-05 02:34:52 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep	1536:GdhFi6Bk2II8vXtCl9GUYui4avWesQbXJQDBYk6zLOpQcI5/Bv/5t94:GJmvy9GUI4QrbbXSDCLOpQcI5/1Rt94
TLSH	T1B8B3D63967D8F222D4AD5ABCC87271F28678ADDADC06811FFD813D463532DF489B2690
TrID	67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 9.7% (.EXE) Win64 Executable (generic) (10523/12/4) 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	1b6ccc6c4c6c2986 (3 x AsyncRAT, 2 x BitRAT, 1 x CoinMiner)
Reporter	adm1n_usa32
Tags:	exe FormBook xworm

Intelligence

File Origin

# of uploads :

# of downloads :

404

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Windows Security.exe

Verdict:

Malicious activity

Analysis date:

2024-09-05 02:38:32 UTC

Tags:

evasion

Link:

https://app.any.run/tasks/04b13589-a3c1-4dcc-9cde-d9b0943a1d6e

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=66d918da8e12b8124ac94150

Tags:

Discovery Execution Generic Infostealer Network Stealth Trojan

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

Creating a file in the %AppData% directory

Launching a process

Creating a window

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

Setting a global event handler for the keyboard

Adding an exclusion to Microsoft Defender

Enabling autorun by creating a file

Verdict:

Malicious

Labled as:

Jalapeno.Generic

Link:

https://www.hybrid-analysis.com/sample/50738407f70e37470182a0da6b44e78eb9cd2be3f7c43e066ea85f92388c79ae

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/6668e63f-1e69-427e-a333-464646d800cf

Result

Threat name:

XWorm

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1504606

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

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 domain / URL

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Protects its processes via BreakOnTermination flag

Sample uses string decryption to hide its real strings

Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet

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

Yara detected Generic Downloader

Yara detected XWorm

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/50738407f70e37470182a0da6b44e78eb9cd2be3f7c43e066ea85f92388c79ae

Detection:

xworm

Link:

https://mwdb.cert.pl/sample/50738407f70e37470182a0da6b44e78eb9cd2be3f7c43e066ea85f92388c79ae/

Threat name:

ByteCode-MSIL.Spyware.AsyncRAT

Status:

Malicious

First seen:

2024-09-05 02:35:04 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

28 of 38 (73.68%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=kbzyib7xby3uoamcudngwrhhr2442k7d67cd4btovbpzeoempgxa._file

Verdict:

malicious

Result

Malware family:

xworm

Score:

10/10

Tags:

family:xworm execution persistence rat trojan

Link:

https://tria.ge/reports/240905-c21bwssfjh/

Behaviour

Scheduled Task/Job: Scheduled Task

Suspicious behavior: AddClipboardFormatListener

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

Looks up external IP address via web service

Checks computer location settings

Drops startup file

Executes dropped EXE

Command and Scripting Interpreter: PowerShell

Detect Xworm Payload

Xworm

Malware Config

C2 Extraction:

127.0.0.1:7000

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/d3d25778-69ad-4f74-b6f9-f8ac553c72c1

Unpacked files

SH256 hash:

50738407f70e37470182a0da6b44e78eb9cd2be3f7c43e066ea85f92388c79ae

MD5 hash:

d59bcf447ab9a90d1c6e9701d85d5700

SHA1 hash:

c7eff0f1d56e71a601cff1e161879ea520886a32

Detections:

XWorm

win_xworm_w0

Link:

https://www.unpac.me/results/7b243af9-afaf-43e9-8f03-d09c6bbbf456/

Parent samples :

50738407f70e37470182a0da6b44e78eb9cd2be3f7c43e066ea85f92388c79ae
5ff4fc5985d8d9877dd5b4abe081ee91681b187e99a466b802a8795fd9e500ab

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/50738407f70e/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/50738407f70e37470182a0da6b44e78eb9cd2be3f7c43e066ea85f92388c79ae

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:	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:	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.

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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