MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 da97458433211f9901d8028600bdded7c5a01f1eecebacc488cd02eaa093b5d8. 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: 8

Intelligence 8 IOCs YARA 1 File information Comments

SHA256 hash:	da97458433211f9901d8028600bdded7c5a01f1eecebacc488cd02eaa093b5d8
SHA3-384 hash:	4dc66b91cf049d244bee1474373240451dfc95ab8fd4c356117bcf72941e8c3cecc10bec5f9ece1be649deb25fe9f3aa
SHA1 hash:	dec80a3df75a75f44cf48ac8dca1bdacd0ce6f20
MD5 hash:	a88fff2150b85ca290a4b73d173f0bcf
humanhash:	blue-utah-asparagus-whiskey
File name:	ErxMjVrB.exe
Download:	download sample
Signature	njrat Create hunting rule
File size:	36'864 bytes
First seen:	2020-09-23 10:33:00 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep	384:i8RZLj6icdri5Z7JAyk/O4GfZ5Ze6yN0rAF+rMRTyN/0L+EcoinblneHQM3epzX9:dRLHJ7k/O4GbZ7yirM+rMRa8Nu26t
Threatray	57 similar samples on MalwareBazaar
TLSH	7FF22A4D7BE08568C9FE067B05B2E4130776E04F5E23D90D8EF264AA36636C18F54AA2
Reporter	pmelson
Tags:	exe NjRAT

Intelligence

File Origin

# of uploads :

# of downloads :

133

Origin country :

n/a

Vendor Threat Intelligence

Detection:

Njrat

Link:

https://www.capesandbox.com/analysis/64795/

Detection(s):

Win.Trojan.B-468

Win.Trojan.Generic-6417450-0

Win.Trojan.Generic-6454614-0

Win.Trojan.Generic-6454615-0

Win.Dropper.njRAT-7436651-0

Win.Packed.Generic-7672854-0

Win.Packed.Generic-7672855-0

Win.Packed.njRAT-7672853-1

Result

Verdict:

Malware

Maliciousness:

Behaviour

Sending a UDP request

Enabling the 'hidden' option for analyzed file

Creating a file in the %temp% directory

Creating a process from a recently created file

Creating a file

Enabling the 'hidden' option for files in the %temp% directory

Creating a process with a hidden window

Creating a window

DNS request

Unauthorized injection to a recently created process

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

Launching the process to change the firewall settings

Connection attempt to an infection source

Enabling autorun by creating a file

Result

Threat name:

njRat

Detection:

malicious

Classification:

troj.adwa.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/473223

Signature

.NET source code contains potential unpacker

.NET source code references suspicious native API functions

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

Contains functionality to log keystrokes (.Net Source)

Creates autostart registry keys with suspicious names

Detected njRat

Drops PE files to the startup folder

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Modifies the windows firewall

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Uses dynamic DNS services

Uses netsh to modify the Windows network and firewall settings

Yara detected Njrat

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/da97458433211f9901d8028600bdded7c5a01f1eecebacc488cd02eaa093b5d8/

Threat name:

ByteCode-MSIL.Backdoor.Bladabhindi

Status:

Malicious

First seen:

2020-09-23 10:34:34 UTC

AV detection:

27 of 29 (93.10%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=3klulbbteepzsaoyakdabpo627c2ahy65tv2zreizubovietwxma._file

Result

Malware family:

n/a

Score:

8/10

Tags:

persistence evasion

Link:

https://tria.ge/reports/200923-23ym583xke/

Behaviour

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Modifies service

Adds Run key to start application

Drops startup file

Loads dropped DLL

Drops startup file

Executes dropped EXE

Modifies Windows Firewall

Executes dropped EXE

Modifies Windows Firewall

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

Threat name:

NJRat

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/da97458433211f9901d8028600bdded7c5a01f1eecebacc488cd02eaa093b5d8

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.