MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1578d1e95037312fdbb8e0f46f086316e68bad3b9c8cd9a5a9a113fc6a883b90. 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: 10

Intelligence 10 IOCs 2 YARA 9 File information Comments 1

SHA256 hash:	1578d1e95037312fdbb8e0f46f086316e68bad3b9c8cd9a5a9a113fc6a883b90
SHA3-384 hash:	b0ae5247d92e703febbff9f29bb8cfa0111ed2d3764eb58e076f452913320f68d54e56e36f029cd55136dee2463d35e4
SHA1 hash:	a01ae5dbe2782eec6e6aec456d4a108d1361835a
MD5 hash:	de2a2111aa4725f2e06fdafa574fcbf6
humanhash:	connecticut-ink-nebraska-pennsylvania
File name:	1578D1E95037312FDBB8E0F46F086316E68BAD3B9C8CD.exe
Download:	download sample
Signature	njrat Create hunting rule
File size:	166'400 bytes
First seen:	2021-05-12 06:15:39 UTC
Last seen:	2021-05-12 07:01:35 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep	3072:G56QB9olQZ0jNg9i0gg41vsJXe+yj2989Yd9ErhpZHbnVaqgijI296:GsQB9id0c1v+Xe+G2989G9mbbnV5
Threatray	1'005 similar samples on MalwareBazaar
TLSH	45F30BC3B7CD8586F1AEB73079D1315317719CE2252BC63A68A0E2867852FC05F92B67
Reporter	abuse_ch
Tags:	exe NjRAT RAT

abuse_ch

njrat C2:
89.182.30.194:3601

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOC	ThreatFox Reference
89.182.30.194:3601	https://threatfox.abuse.ch/ioc/35963/
89.182.30.194:3604	https://threatfox.abuse.ch/ioc/35964/

Intelligence

File Origin

# of uploads :

# of downloads :

228

Origin country :

n/a

Vendor Threat Intelligence

Detection(s):

ditekSHen.MALWARE.Win.Trojan.DLAgent02.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Launching a process

Creating a process with a hidden window

DNS request

Sending a custom TCP request

Running batch commands

Sending a UDP request

Unauthorized injection to a recently created process

Adding an access-denied ACE

Creating a file

Creating a window

Using the Windows Management Instrumentation requests

Reading critical registry keys

Creating a file in the %temp% directory

Creating a process from a recently created file

Sending a TCP request to an infection source

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

Enabling autorun by creating a file

Adding exclusions to Windows Defender

Enabling autorun

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:

AsyncRAT

Detection:

malicious

Classification:

troj.adwa.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/779478

Signature

.NET source code contains very large strings

.NET source code references suspicious native API functions

Adds a directory exclusion to Windows Defender

C2 URLs / IPs found in malware configuration

Connects to a pastebin service (likely for C&C)

Contains functionality to hide a thread from the debugger

Creates an undocumented autostart registry key

Drops PE files to the startup folder

Found malware configuration

Hides threads from debuggers

Machine Learning detection for dropped file

Machine Learning detection for sample

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Protects its processes via BreakOnTermination flag

Sigma detected: Powershell adding suspicious path to exclusion list

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

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Uses dynamic DNS services

Yara detected AsyncRAT

Yara detected Costura Assembly Loader

Behaviour

Behavior Graph:

Download SVG

Detection:

asyncrat

Link:

https://mwdb.cert.pl/sample/1578d1e95037312fdbb8e0f46f086316e68bad3b9c8cd9a5a9a113fc6a883b90/

Threat name:

ByteCode-MSIL.Trojan.Remcos

Status:

Malicious

First seen:

2021-05-11 00:11:00 UTC

AV detection:

19 of 29 (65.52%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=cv4nd2kqg4ys7w5y4d2g6cddc3tixlj3tsgntjnjuej7y2uihoia._file

Verdict:

malicious

Label(s):

asyncrat

Result

Malware family:

asyncrat

Score:

10/10

Tags:

family:asyncrat evasion persistence rat spyware stealer trojan

Link:

https://tria.ge/reports/210512-6szyf5ee8e/

Behaviour

Delays execution with timeout.exe

Modifies data under HKEY_USERS

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Program crash

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Adds Run key to start application

Legitimate hosting services abused for malware hosting/C2

Deletes itself

Drops startup file

Loads dropped DLL

Reads user/profile data of web browsers

Windows security modification

Executes dropped EXE

Async RAT payload

AsyncRat

Modifies WinLogon for persistence

Modifies Windows Defender Real-time Protection settings

Turns off Windows Defender SpyNet reporting

Windows security bypass

Malware Config

C2 Extraction:

dontreachme3.ddns.net:3601
dontreachme1.ddns.net:3601

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/1578d1e95037312fdbb8e0f46f086316e68bad3b9c8cd9a5a9a113fc6a883b90

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:	asyncrat Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect AsyncRat in memory
Reference:	internal research

Rule name:	INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse Create hunting rule
Author:	ditekSHen
Description:	Detects file containing reversed ASEP Autorun registry keys

Rule name:	MALWARE_Win_DLAgent02 Create hunting rule
Author:	ditekSHen
Description:	Detects known downloader agent downloading encoded binaries in patches from paste-like websites, most notably hastebin

Rule name:	pe_imphash Create hunting rule

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

Rule name:	Reverse_text_bin_mem Create hunting rule
Author:	James_inthe_box
Description:	Reverse text detected

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

Rule name:	win_asyncrat_j1 Create hunting rule
Author:	Johannes Bader @viql
Description:	detects AsyncRAT

Rule name:	win_asyncrat_w0 Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect AsyncRat in memory
Reference:	internal research

File information

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

No further information available

Comments

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a̵c̵c̸i̵d̷e̵n̷t̴a̷l̴r̵e̷b̸e̴l̸ commented on 2021-05-12 06:59:15 UTC

============================================================
MBC behaviors list (github.com/accidentalrebel/mbcscan):
============================================================
0) [B0009] Anti-Behavioral Analysis::Virtual Machine Detection