MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8eb3881ba7d320c0760042529414e8ee87b8bfc648c34d87dd36ed854b0c8b7b. 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:	8eb3881ba7d320c0760042529414e8ee87b8bfc648c34d87dd36ed854b0c8b7b
SHA3-384 hash:	e055d24ae221a13a8f41bb07b443b42ab16e349da38cf3389caff19e0ab95842585967ade1c5471cc131748419284d0f
SHA1 hash:	42ddaf9aef498e366fecdad6b2acbbe9d9d0d47c
MD5 hash:	2308cedb77f66e4a821d57e8ee1e08a5
humanhash:	edward-timing-april-don
File name:	6UT0pBxT.exe
Download:	download sample
Signature	njrat Create hunting rule
File size:	708'608 bytes
First seen:	2021-07-19 18:47:29 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	6f0fecaae0f40ed3ea31df971b69bcca (1 x njrat, 1 x DarkComet)
ssdeep	12288:wX2JVHMRtDaSm3TJvVNvWV5YTsY7tHwbz/htfcoCoK632zb7G/QXiU:2ss2Sm39NNv9wY7tHwbzfIoK6MosiU
Threatray	112 similar samples on MalwareBazaar
TLSH	T112E48F31F2808837D97219789C5F92E5982DBE212E34794B3AE62F4C5F3D6C239162D7
Reporter	pmelson
Tags:	DarkComet exe NjRAT

Intelligence

File Origin

# of uploads :

# of downloads :

927

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

6UT0pBxT.exe

Verdict:

Malicious activity

Analysis date:

2021-07-19 18:49:32 UTC

Tags:

n/a

Link:

https://app.any.run/tasks/2d17fcaa-be71-465e-ab90-fb4fdc14892e

Note:

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

Detection:

DarkComet

Link:

https://www.capesandbox.com/analysis/172641/

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:

DarkComet

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/d2e70a2d-7a02-4678-89c6-7b8de3e09671

Result

Threat name:

Darkcomet Njrat

Detection:

malicious

Classification:

rans.troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/818492

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

C2 URLs / IPs found in malware configuration

Changes security center settings (notifications, updates, antivirus, firewall)

Contains functionality to capture and log keystrokes

Contains functionality to inject code into remote processes

Contains functionality to log keystrokes

Contains functionality to log keystrokes (.Net Source)

Contains functionalty to change the wallpaper

Creates a thread in another existing process (thread injection)

Creates an undocumented autostart registry key

Deletes itself after installation

Detected Darkcomet RAT

Found malware configuration

Installs a global keyboard hook

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Uses cmd line tools excessively to alter registry or file data

Uses dynamic DNS services

Writes to foreign memory regions

Yara detected DarkComet

Yara detected Njrat

Behaviour

Behavior Graph:

Download SVG

Detection:

njrat

Link:

https://mwdb.cert.pl/sample/8eb3881ba7d320c0760042529414e8ee87b8bfc648c34d87dd36ed854b0c8b7b/

Threat name:

Win32.Backdoor.Fynloski

Status:

Malicious

First seen:

2021-07-19 18:48:07 UTC

AV detection:

27 of 28 (96.43%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=r2zyqg5h2mqma5qaijjjifhi52d3rp6gjdbu3b65g3wyksymrn5q._file

Result

Malware family:

darkcomet

Score:

10/10

Tags:

family:darkcomet evasion persistence rat trojan

Link:

https://tria.ge/reports/210719-knkkkhdk3j/

Behaviour

Modifies registry class

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

System policy modification

Views/modifies file attributes

Enumerates physical storage devices

Adds Run key to start application

Checks computer location settings

Deletes itself

Loads dropped DLL

Windows security modification

Executes dropped EXE

Sets file to hidden

Darkcomet

Modifies WinLogon for persistence

Modifies security service

Windows security bypass

Unpacked files

SH256 hash:

8eb3881ba7d320c0760042529414e8ee87b8bfc648c34d87dd36ed854b0c8b7b

MD5 hash:

2308cedb77f66e4a821d57e8ee1e08a5

SHA1 hash:

42ddaf9aef498e366fecdad6b2acbbe9d9d0d47c

Detections:

win_darkcomet_auto

win_darkcomet_g0

Link:

https://www.unpac.me/results/e80426d0-b433-4d03-af42-47760beaa488/

Parent samples :

8eb3881ba7d320c0760042529414e8ee87b8bfc648c34d87dd36ed854b0c8b7b
846d82f6f9d6b965ef683cd91724d72917263cf21e9f0f7e4ed2cb4f1ceacce8

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

Threat name:

DarkComet

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/8eb3881ba7d320c0760042529414e8ee87b8bfc648c34d87dd36ed854b0c8b7b

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:	Intezer_Vaccine_DarkComet Create hunting rule
Author:	Intezer Labs
Description:	Automatic YARA vaccination rule created based on the file's genes
Reference:	https://analyze.intezer.com

Rule name:	Malware_QA_update Create hunting rule
Author:	Florian Roth
Description:	VT Research QA uploaded malware - file update.exe
Reference:	VT Research QA

Rule name:	RAT_DarkComet Create hunting rule
Author:	Kevin Breen <kevin@techanarchy.net>
Description:	Detects DarkComet RAT
Reference:	http://malwareconfig.com/stats/DarkComet

Rule name:	win_darkcomet_auto Create hunting rule
Author:	Felix Bilstein - yara-signator at cocacoding dot com
Description:	autogenerated rule brought to you by yara-signator