MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5a4b33d906d084990e92fb7556609e492b878d2e69edce8eecfa409aeea80498. 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: 19

Intelligence 19 IOCs YARA 17 File information Comments

SHA256 hash:	5a4b33d906d084990e92fb7556609e492b878d2e69edce8eecfa409aeea80498
SHA3-384 hash:	bcab65f603a6bf2c0aeeba0cd482b0193dc92ba7cab8537be4baf2b0e39babd930e658c494f9924ec8a6a40e8ffda514
SHA1 hash:	fe53099b74045d3d263dfa9ea0d37a08f1b7bff4
MD5 hash:	0e767d7c682ca681606c0a85768814dc
humanhash:	december-whiskey-snake-black
File name:	bVeW.exe
Download:	download sample
Signature	njrat Create hunting rule
File size:	79'872 bytes
First seen:	2024-09-02 19:35:58 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'855 x AgentTesla, 19'783 x Formbook, 12'304 x SnakeKeylogger)
ssdeep	1536:Gtn+F1lyjDpnS5wpOk3JCK6pFozjP6fOpd/9nEh9TGAJtR:wQwpOk5CK6zO/9ESAJt
TLSH	T1AC733A4877F54A12E1BF1DB5897292220B35FC035E26F76D09D174AA5FB36C08A09FB2
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
Reporter	pmelson
Tags:	exe NjRAT

Intelligence

File Origin

# of uploads :

# of downloads :

457

Origin country :

Vendor Threat Intelligence

Malware family:

njrat

ID:

File name:

bVeW.exe

Verdict:

Malicious activity

Analysis date:

2024-09-02 19:53:19 UTC

Tags:

rat njrat bladabindi remote

Link:

https://app.any.run/tasks/cc56e793-1e1d-418f-a859-6aa5c43c6b18

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=66d613b78e12b8124ac90262

Tags:

Network Stealth

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Сreating synchronization primitives

Creating a window

Searching for synchronization primitives

DNS request

Connection attempt

Using the Windows Management Instrumentation requests

Sending a custom TCP request

Enabling a "Do not show hidden files" option

Verdict:

Malicious

Threat level:

10/10

Confidence:

90%

Tags:

anti-debug anti-vm cmd evasive eventvwr explorer hook keylogger lolbin lolbin njrat overlay rat schtasks vbnet wscript

Link:

https://www.filescan.io/uploads/66d64a2f8c54386fdbc896e5/reports/973c19ed-6cbe-4175-b111-75d8090f4556/overview

Verdict:

Malicious

Labled as:

Gen:Ransom.REntS.Generic

Link:

https://www.hybrid-analysis.com/sample/5a4b33d906d084990e92fb7556609e492b878d2e69edce8eecfa409aeea80498

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:

njRAT

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/954f1956-945e-4b60-b122-b05feb56a78c

Result

Threat name:

Njrat

Detection:

malicious

Classification:

phis.troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1503054

Signature

.NET source code contains potential unpacker

.NET source code references suspicious native API functions

AI detected suspicious sample

Antivirus / Scanner detection for submitted sample

Changes the view of files in windows explorer (hidden files and folders)

Contains functionality to capture screen (.Net source)

Contains functionality to log keystrokes (.Net Source)

Disables zone checking for all users

Found malware configuration

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Suricata IDS alerts for network traffic

Uses dynamic DNS services

Yara detected Generic Downloader

Yara detected Njrat

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/5a4b33d906d084990e92fb7556609e492b878d2e69edce8eecfa409aeea80498

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/5a4b33d906d084990e92fb7556609e492b878d2e69edce8eecfa409aeea80498/

Threat name:

ByteCode-MSIL.Backdoor.njRAT

Status:

Malicious

First seen:

2024-09-02 19:36:15 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

24 of 24 (100.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=ljfthwig2ccjsdus7n2vmye6jevypdjonhw45dxm7jajv3viasma._file

Verdict:

malicious

Label(s):

njrat

Result

Malware family:

njrat

Score:

10/10

Tags:

family:njrat botnet:lime discovery

Link:

https://tria.ge/reports/240902-ya9bdaxaqd/

Behaviour

Suspicious use of AdjustPrivilegeToken

System Location Discovery: System Language Discovery

Malware Config

C2 Extraction:

fdfdsfdsag.duckdns.org:8030

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/25f6d3b2-bcb8-49a4-ad2f-d89802891172

Unpacked files

SH256 hash:

5a4b33d906d084990e92fb7556609e492b878d2e69edce8eecfa409aeea80498

MD5 hash:

0e767d7c682ca681606c0a85768814dc

SHA1 hash:

fe53099b74045d3d263dfa9ea0d37a08f1b7bff4

Detections:

NjRat

win_njrat_w1

Njrat

CN_disclosed_20180208_c

Link:

https://www.unpac.me/results/504ae083-0509-40ad-a6f8-2775a5dd7cfd/

Malware family:

njRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/5a4b33d906d0/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/5a4b33d906d084990e92fb7556609e492b878d2e69edce8eecfa409aeea80498

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:	CN_disclosed_20180208_c Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects malware from disclosed CN malware set
Reference:	https://twitter.com/cyberintproject/status/961714165550342146

Rule name:	CN_disclosed_20180208_c_RID2E71 Create hunting rule
Author:	Florian Roth
Description:	Detects malware from disclosed CN malware set
Reference:	https://twitter.com/cyberintproject/status/961714165550342146

Rule name:	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer Create hunting rule
Author:	ditekSHen
Description:	detects Windows exceutables potentially bypassing UAC using eventvwr.exe

Rule name:	malware_Njrat_strings Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect njRAT in memory

Rule name:	MALWARE_Win_NjRAT Create hunting rule
Author:	ditekSHen
Description:	Detects NjRAT / Bladabindi / NjRAT Golden

Rule name:	MAL_njrat Create hunting rule
Author:	SECUINFRA Falcon Team

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:	NET Create hunting rule
Author:	malware-lu

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

Rule name:	Njrat Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect njRAT in memory

Rule name:	pe_imphash Create hunting rule

Rule name:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

Rule name:	Windows_Trojan_Njrat_30f3c220 Create hunting rule

Rule name:	Windows_Trojan_Njrat_30f3c220 Create hunting rule
Author:	Elastic Security

Rule name:	win_njrat_w1 Create hunting rule
Author:	Brian Wallace @botnet_hunter <bwall@ballastsecurity.net>
Description:	Identify njRat

File information

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

Web download

njrat

exe 5a4b33d906d084990e92fb7556609e492b878d2e69edce8eecfa409aeea80498

(this sample)

Link

https://www.virustotal.com/gui/file/5a4b33d906d084990e92fb7556609e492b878d2e69edce8eecfa409aeea80498/detection

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

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