MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c91e5ce3dc54a407d6fce46eede37d2e2343f4db688e158e23abb543ce5a350. 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: 13

Intelligence 13 IOCs YARA 4 File information Comments

SHA256 hash:	4c91e5ce3dc54a407d6fce46eede37d2e2343f4db688e158e23abb543ce5a350
SHA3-384 hash:	c99865f9dc512d065a4aeb26b13f86fffb2835d438ffec2ed3a4d329c10ecd8e51657cdca182ef3688b02dc843798a49
SHA1 hash:	85c1ab9c6fe450a83fb2cc1681b45272020ce5a6
MD5 hash:	5859e656d5735eb9a1eeae9a94a3cc16
humanhash:	alpha-freddie-cat-butter
File name:	ZAgNhZBG.exe
Download:	download sample
Signature	njrat Create hunting rule
File size:	24'064 bytes
First seen:	2020-12-21 01:47:20 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'750 x AgentTesla, 19'656 x Formbook, 12'248 x SnakeKeylogger)
ssdeep	384:YMKFYuEEhERvoBG16Xuy0MHNw6Tg1Y+75JTFmRvR6JZlbw8hqIusZzZCw:vW4V6+yDRpcnuw
Threatray	506 similar samples on MalwareBazaar
TLSH	78B22A0E3FA98856C5BC1B7486A5965003B4D1870413EE2FCDC564CBAFB3AD91D48AF9
Reporter	pmelson
Tags:	exe NjRAT

Intelligence

File Origin

# of uploads :

# of downloads :

327

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

ZAgNhZBG.exe

Verdict:

Malicious activity

Analysis date:

2020-12-21 01:49:05 UTC

Tags:

rat njrat bladabindi trojan

Link:

https://app.any.run/tasks/c2e14d94-cc87-48c7-ae9e-89d95545a159

Note:

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

Detection:

Njrat

Link:

https://www.capesandbox.com/analysis/108634/

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a file in the %temp% directory

Creating a process from a recently created file

Creating a file

Creating a process with a hidden window

Creating a window

DNS request

Using the Windows Management Instrumentation requests

Sending a UDP request

Launching a process

Deleting a recently created file

Reading critical registry keys

Unauthorized injection to a recently created process

Launching the process to change the firewall settings

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

Sending a TCP request to an infection source

Enabling autorun by creating a file

Unauthorized injection to a system process

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.

Result

Threat name:

njRat BrowserPasswordDump Tool

Detection:

malicious

Classification:

phis.troj.adwa.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/567097

Signature

.NET source code contains potential unpacker

.NET source code references suspicious native API functions

Allocates memory in foreign processes

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

Contains functionality to log keystrokes (.Net Source)

Contains functionality to steal Internet Explorer form passwords

Creates autostart registry keys with suspicious names

Detected njRat

Drops PE files to the startup folder

Injects a PE file into a foreign processes

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 domain / URL

Multi AV Scanner detection for submitted file

Sample uses process hollowing technique

Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)

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

Tries to harvest and steal ftp login credentials

Tries to steal Instant Messenger accounts or passwords

Uses dynamic DNS services

Uses netsh to modify the Windows network and firewall settings

Writes to foreign memory regions

Yara detected BrowserPasswordDump Tool by SecurityXploded

Yara detected Njrat

Behaviour

Behavior Graph:

Download SVG

Detection:

njrat

Link:

https://mwdb.cert.pl/sample/4c91e5ce3dc54a407d6fce46eede37d2e2343f4db688e158e23abb543ce5a350/

Threat name:

ByteCode-MSIL.Backdoor.Bladabhindi

Status:

Malicious

First seen:

2020-12-21 01:48:05 UTC

AV detection:

27 of 29 (93.10%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=jsi6ltr5yvfea7lpzzdo5xrx2lrdip2nw2eocwhchk5viphfunia._file

Result

Malware family:

njrat

Score:

10/10

Tags:

family:njrat evasion persistence spyware trojan upx

Link:

https://tria.ge/reports/201221-dp5bj79tvx/

Behaviour

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Adds Run key to start application

Drops startup file

Loads dropped DLL

Reads data files stored by FTP clients

Uses the VBS compiler for execution

Executes dropped EXE

Modifies Windows Firewall

UPX packed file

njRAT/Bladabindi

Unpacked files

SH256 hash:

4c91e5ce3dc54a407d6fce46eede37d2e2343f4db688e158e23abb543ce5a350

MD5 hash:

5859e656d5735eb9a1eeae9a94a3cc16

SHA1 hash:

85c1ab9c6fe450a83fb2cc1681b45272020ce5a6

Detections:

win_njrat_g1

win_njrat_w1

Link:

https://www.unpac.me/results/f55420b5-54ab-446a-a380-8f34d41011f7/

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/4c91e5ce3dc54a407d6fce46eede37d2e2343f4db688e158e23abb543ce5a350

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
Description:	Detects malware from disclosed CN malware set
Reference:	https://twitter.com/cyberintproject/status/961714165550342146

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

Rule name:	Ping_Del_method_bin_mem Create hunting rule
Author:	James_inthe_box
Description:	cmd ping IP nul del

Rule name:	win_njrat_w1 Create hunting rule
Author:	Brian Wallace @botnet_hunter
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 4c91e5ce3dc54a407d6fce46eede37d2e2343f4db688e158e23abb543ce5a350

(this sample)

Link

https://www.virustotal.com/gui/file/4c91e5ce3dc54a407d6fce46eede37d2e2343f4db688e158e23abb543ce5a350/detection

Delivery method

Distributed via web download

Cape

https://www.capesandbox.com/analysis/108634/

Comments

Login required

You need to login to in order to write a comment. Login with your abuse.ch account.

No comments found for this malware sample