MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef2cda3a12c765e1311e63e4485f286f66db64e0a28cb1b26af360c933cfcf36. 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: 12

Intelligence 12 IOCs YARA 7 File information Comments

SHA256 hash:	ef2cda3a12c765e1311e63e4485f286f66db64e0a28cb1b26af360c933cfcf36
SHA3-384 hash:	283155dfe33c49aab8b5d54a94833a6c4e1b3a1573f0faa031cd1483c46577953aeaf6425e983af15f5bb3c00e1890a7
SHA1 hash:	14c78b2983a7a2f2dc8d57a899bf376d049d4d30
MD5 hash:	bd68f9bfca51f78953b2c4bd58701c85
humanhash:	king-wisconsin-berlin-double
File name:	file.exe
Download:	download sample
Signature	njrat Create hunting rule
File size:	1'563'136 bytes
First seen:	2023-05-24 01:18:25 UTC
Last seen:	2023-05-24 09:55:18 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	baa93d47220682c04d92f7797d9224ce (139 x RiseProStealer, 26 x Xtrat, 18 x CoinMiner)
ssdeep	24576:BCc/UVlpKZRVyco6Z52ZhD4mSUG5IP0R0CP1XPo1IVCh:4AZryYZ52TzSUGkCrK
Threatray	140 similar samples on MalwareBazaar
TLSH	T13B75236217099C16DF3A4BFA422ED1B743661C045E74C8AA2AE9FF47FF73242AC9105D
TrID	52.9% (.EXE) Win32 Executable (generic) (4505/5/1) 23.5% (.EXE) Generic Win/DOS Executable (2002/3) 23.5% (.EXE) DOS Executable Generic (2000/1)
File icon (PE):
dhash icon	44badaca4a5ab042 (1 x njrat)
Reporter	Chainskilabs
Tags:	exe NjRAT

Intelligence

File Origin

# of uploads :

# of downloads :

306

Origin country :

Vendor Threat Intelligence

Malware family:

njrat

ID:

File name:

Krnl.exe

Verdict:

Malicious activity

Analysis date:

2023-05-22 07:06:31 UTC

Tags:

rat njrat bladabindi

Link:

https://app.any.run/tasks/c134c1a1-0424-423d-9c9a-095c17e64ead

Note:

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

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/390936/

Detection(s):

SecuriteInfo.com.DeepScan.Generic.MSIL.Bladabindi.AF8E6D1D.18105.6027.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for synchronization primitives

DNS request

Searching for the window

Сreating synchronization primitives

Searching for analyzing tools

Creating a process with a hidden window

Enabling the 'hidden' option for analyzed file

Creating a file

Enabling the 'hidden' option for recently created files

Creating a window

Sending a custom TCP request

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

Launching the process to change the firewall settings

Creating a file in the mass storage device

Enabling autorun by creating a file

Enabling threat expansion on mass storage devices

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

packed

Link:

https://www.filescan.io/uploads/646d6607e164c8d51bac6373/reports/08670dae-976b-4a3c-9096-39640c6264c2/overview

Verdict:

Malicious

Labled as:

DeepScan:Generic.MSIL.Bladabindi

Link:

https://www.hybrid-analysis.com/sample/ef2cda3a12c765e1311e63e4485f286f66db64e0a28cb1b26af360c933cfcf36

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.

Verdict:

Unknown

Link:

https://analyze.intezer.com/analyses/709c26ee-04d6-4053-91a7-8244564f165e

Result

Threat name:

Njrat

Detection:

malicious

Classification:

spre.troj.adwa.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1241268

Signature

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Creates autorun.inf (USB autostart)

Creates autostart registry keys with suspicious names

Detected unpacking (changes PE section rights)

Drops PE files to the startup folder

Drops PE files with benign system names

Found malware configuration

Hides threads from debuggers

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 dropped file

Multi AV Scanner detection for submitted file

PE file contains section with special chars

Protects its processes via BreakOnTermination flag

Sigma detected: Drops fake system file at system root drive

Tries to detect sandboxes / dynamic malware analysis system (registry check)

Tries to detect sandboxes and other dynamic analysis tools (window names)

Tries to detect virtualization through RDTSC time measurements

Tries to evade debugger and weak emulator (self modifying code)

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/ef2cda3a12c765e1311e63e4485f286f66db64e0a28cb1b26af360c933cfcf36/

Threat name:

ByteCode-MSIL.Backdoor.Bladabhindi

Status:

Malicious

First seen:

2023-05-20 17:51:49 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

20 of 23 (86.96%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=54wnuoqsy5s6cmi6mpseqxzin5tnwzhaukgldmtk6nqmsm6pz43a._file

Result

Malware family:

n/a

Score:

9/10

Tags:

evasion persistence

Link:

https://tria.ge/reports/230524-bphqmsah91/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Drops autorun.inf file

Suspicious use of NtSetInformationThreadHideFromDebugger

Adds Run key to start application

Checks BIOS information in registry

Drops startup file

Identifies Wine through registry keys

Modifies Windows Firewall

Identifies VirtualBox via ACPI registry values (likely anti-VM)

Unpacked files

SH256 hash:

ef2cda3a12c765e1311e63e4485f286f66db64e0a28cb1b26af360c933cfcf36

MD5 hash:

bd68f9bfca51f78953b2c4bd58701c85

SHA1 hash:

14c78b2983a7a2f2dc8d57a899bf376d049d4d30

Link:

https://www.unpac.me/results/3dc3c941-7a71-45f5-a6d9-8c34d87b9a47/

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/ef2cda3a12c765e1311e63e4485f286f66db64e0a28cb1b26af360c933cfcf36

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:	Disable_Defender Create hunting rule
Author:	iam-py-test
Description:	Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen

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

Rule name:	meth_get_eip Create hunting rule
Author:	Willi Ballenthin

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
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.

Cape

https://www.capesandbox.com/analysis/390936/

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