MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b16d313553a948e95d0dfc250f47060b83ca23a2b19db24c380ce01fa607f65. 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: 21

Intelligence 21 IOCs YARA 36 File information Comments 1

SHA256 hash:	4b16d313553a948e95d0dfc250f47060b83ca23a2b19db24c380ce01fa607f65
SHA3-384 hash:	60bfc4b94ac139d793d545c403d4b17a9504b96d6e37bdef1694bbf3f3d1fe0f74577c372108007c37d67e8230d1f79e
SHA1 hash:	b837f1a0c886c91b3ba0f788ab9aea5e91cbe669
MD5 hash:	083c81aa9258d1058ef4cda4f9ac6699
humanhash:	uranus-vermont-speaker-aspen
File name:	083c81aa9258d1058ef4cda4f9ac6699.exe
Download:	download sample
Signature	njrat Create hunting rule
File size:	66'048 bytes
First seen:	2026-02-16 16:11:48 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (49'239 x AgentTesla, 20'492 x Formbook, 12'372 x SnakeKeylogger)
ssdeep	1536:0k+yyiX8/UgTlfSPvHtOhEAb6Zbbljs+PjDljj2f+:9+X/UgdgtSEAb6tljsm
TLSH	T1FD534B0437F9C129F5FE8F7898F2215486B9B6677A13DB4D0CD420D50A22BC5DA826FE
TrID	70.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 6.2% (.EXE) Win64 Executable (generic) (6522/11/2) 4.8% (.EXE) Win16 NE executable (generic) (5038/12/1) 4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika	pebin
Reporter	abuse_ch
Tags:	exe NjRAT

Intelligence

File Origin

# of uploads :

# of downloads :

227

Origin country :

Vendor Threat Intelligence

Malware configuration found for:

AsyncRAT

Details

Link:

https://research.acce.ciphertechsolutions.com/results/84faf939-e2ba-4873-aa99-588a861af036/

Malware family:

asyncrat

ID:

File name:

083c81aa9258d1058ef4cda4f9ac6699.exe

Verdict:

Malicious activity

Analysis date:

2026-02-16 16:12:58 UTC

Tags:

auto-sch auto-reg rat asyncrat remote

Link:

https://app.any.run/tasks/3bcabb3f-3fde-4d22-890d-0ad497f698b6

Note:

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

Detection:

AsyncRAT

Link:

https://www.capesandbox.com/analysis/53436/

Detection(s):

Win.Packed.Razy-9625918-0

Win.Packed.AsyncRAT-9861056-1

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=699341e32715406c647a213f

Tags:

asyncrat vmdetect autorun

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

anti-vm anti-vm asyncrat base64 evasive explorer fingerprint lolbin obfuscated obfuscated reconnaissance reg schtasks vbnet wscript

Link:

https://www.filescan.io/uploads/699341e3930564ff3ca4055c/reports/d9c30829-5e17-4957-a63f-84bb73b221a1/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/4b16d313553a948e95d0dfc250f47060b83ca23a2b19db24c380ce01fa607f65

Verdict:

Malicious

File Type:

exe x32

First seen:

2026-02-13T04:21:00Z UTC

Last seen:

2026-02-13T17:03:00Z UTC

Hits:

~10

Detections:

PDM:Trojan.Win32.Tasker.cust HEUR:Trojan-Downloader.MSIL.Agent.gen HEUR:Backdoor.MSIL.SheetRat.gen Backdoor.MSIL.Crysan.sb Backdoor.MSIL.Crysan.d Backdoor.MSIL.Crysan.b Trojan-PSW.Win32.Stealer.sb Trojan.Win32.Vimditator.sb Trojan.Win32.Agent.sb Trojan.MSIL.Dnoper.sb PDM:Trojan.Win32.Generic HEUR:Trojan.Win32.Generic

Link:

https://opentip.kaspersky.com/4b16d313553a948e95d0dfc250f47060b83ca23a2b19db24c380ce01fa607f65/results?tab=lookup

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/61f58726-3d5b-4804-bde8-fa9b5c0553c3

Result

Threat name:

AsyncRAT

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1870043

Signature

.NET source code contains potential unpacker

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

Found malware configuration

Joe Sandbox ML detected suspicious sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Protects its processes via BreakOnTermination flag

Sample uses string decryption to hide its real strings

Sigma detected: Invoke-Obfuscation CLIP+ Launcher

Sigma detected: Invoke-Obfuscation VAR+ Launcher

Suricata IDS alerts for network traffic

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

Uses schtasks.exe or at.exe to add and modify task schedules

Yara detected AsyncRAT

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/4b16d313553a948e95d0dfc250f47060b83ca23a2b19db24c380ce01fa607f65

Verdict:

AsyncRAT

YARA:

15 match(es)

Tags:

.Net AsyncRAT Executable Managed .NET PE (Portable Executable) PE File Layout RAT SOS: 0.81 Win 32 Exe x86

Malware Config

C2 Extraction:

CNC: 127.0.0.1,37.114.46.213
PORT: 6606,7707,8808

Link:

https://app.malva.re/file/083c81aa9258d1058ef4cda4f9ac6699

Detection:

asyncrat

Link:

https://mwdb.cert.pl/sample/4b16d313553a948e95d0dfc250f47060b83ca23a2b19db24c380ce01fa607f65/

Verdict:

Malicious

Threat:

Family.ANARCHYRAT

Link:

https://tip.neiki.dev/file/4b16d313553a948e95d0dfc250f47060b83ca23a2b19db24c380ce01fa607f65

Threat name:

ByteCode-MSIL.Backdoor.AsyncRAT

Status:

Malicious

First seen:

2026-02-12 23:22:03 UTC

File Type:

PE (.Net 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=jmlnge2vhkki5foq37bfb5dqmc4dzir2fmm5wjgdqdhad6tap5sq._file

Verdict:

malicious

Label(s):

asyncrat

Similar samples:

error

njrat

Result

Malware family:

asyncrat

Score:

10/10

Tags:

family:asyncrat defense_evasion discovery execution persistence rat

Link:

https://tria.ge/reports/260216-tnmmbadv3f/

Behaviour

Delays execution with timeout.exe

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Adds Run key to start application

Checks computer location settings

Executes dropped EXE

Async RAT payload

AsyncRat

Asyncrat family

Unpacked files

SH256 hash:

4b16d313553a948e95d0dfc250f47060b83ca23a2b19db24c380ce01fa607f65

MD5 hash:

083c81aa9258d1058ef4cda4f9ac6699

SHA1 hash:

b837f1a0c886c91b3ba0f788ab9aea5e91cbe669

Detections:

win_asyncrat_w0

AsyncRAT

Link:

https://www.unpac.me/results/276627bb-92fb-4190-9324-abf552097650/

Malware family:

AsyncRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/4b16d313553a/report/overview.html

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

Threat name:

iSpy Keylogger

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/4b16d313553a948e95d0dfc250f47060b83ca23a2b19db24c380ce01fa607f65

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:	kevoreilly, JPCERT/CC Incident Response Group
Description:	AsyncRat Payload

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

Rule name:	asyncrat_kingrat Create hunting rule
Author:	jeFF0Falltrades

Rule name:	Check_Qemu_Description Create hunting rule

Rule name:	Check_Qemu_DeviceMap Create hunting rule

Rule name:	Check_VBox_Description Create hunting rule

Rule name:	Check_VBox_DeviceMap Create hunting rule

Rule name:	Check_VBox_VideoDrivers Create hunting rule

Rule name:	Check_VMWare_DeviceMap Create hunting rule

Rule name:	CP_Script_Inject_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

Rule name:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerCheck__QueryInfo Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerCheck__RemoteAPI Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

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

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

Rule name:	malware_asyncrat Create hunting rule
Description:	detect AsyncRat in memory
Reference:	https://github.com/NYAN-x-CAT/AsyncRAT-C-Sharp

Rule name:	MAL_AsnycRAT Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detects AsnycRAT based on it's config decryption routine

Rule name:	MAL_AsyncRAT_Config_Decryption Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detects AsnycRAT based on it's config decryption routine

Rule name:	MAL_Winnti_Sample_May18_1 Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects malware sample from Burning Umbrella report - Generic Winnti Rule
Reference:	https://401trg.pw/burning-umbrella/

Rule name:	MAL_Winnti_Sample_May18_1_RID3003 Create hunting rule
Author:	Florian Roth
Description:	Detects malware sample from Burning Umbrella report - Generic Winnti Rule
Reference:	https://401trg.pw/burning-umbrella/

Rule name:	Mal_WIN_AsyncRat_RAT_PE Create hunting rule
Author:	Phatcharadol Thangplub
Description:	Use to detect AsyncRAT implant.

Rule name:	msil_suspicious_use_of_strreverse Create hunting rule
Author:	dr4k0nia
Description:	Detects mixed use of Microsoft.CSharp and VisualBasic to use StrReverse

Rule name:	Multifamily_RAT_Detection Create hunting rule
Author:	Lucas Acha (http://www.lukeacha.com)
Description:	Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables

Rule name:	NET Create hunting rule
Author:	malware-lu

Rule name:	NETexecutableMicrosoft Create hunting rule
Author:	malware-lu

Rule name:	Njrat Create hunting rule
Author:	botherder https://github.com/botherder
Description:	Njrat

Rule name:	pe_imphash Create hunting rule

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

Rule name:	SUSP_DOTNET_PE_List_AV Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detecs .NET Binary that lists installed AVs

Rule name:	SUSP_Reverse_Run_Key Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detects a Reversed Run Key

Rule name:	Sus_CMD_Powershell_Usage Create hunting rule
Author:	XiAnzheng
Description:	May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

Rule name:	Windows_Trojan_Asyncrat_11a11ba1 Create hunting rule
Author:	Elastic Security

Rule name:	win_asyncrat_bytecodes Create hunting rule
Author:	Matthew @ Embee_Research
Description:	Detects bytecodes present in unobfuscated AsyncRat Samples. Rule may also pick up on other Asyncrat-derived malware (Dcrat/venom etc)

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.

Cape

https://www.capesandbox.com/analysis/53436/

Comments

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commented on 2026-02-16 16:16:12 UTC

RAT King Parser (https://github.com/jeFF0Falltrades/rat_king_parser) Output:

{
"sha256": "4b16d313553a948e95d0dfc250f47060b83ca23a2b19db24c380ce01fa607f65",
"yara_possible_family": "asyncrat",
"key": "956beef14814033ac311d5d0541b929358536b086d1b05ad0568f38f0607394a",
"salt": "bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941",
"config": {
"obfuscated_key_1": "6606,7707,8808",
"obfuscated_key_2": "127.0.0.1,37.114.46.213",
"obfuscated_key_3": "Amnesia 0.7.2",
"obfuscated_key_4": "true",
"obfuscated_key_5": "%AppData%",
"obfuscated_key_6": "win32.exe",
"obfuscated_key_7": "R2FkbnZPNzRtRFNqeTJmRmFvdnpRalJkYlVoU3VjQWk=",
"obfuscated_key_8": "nXCHjS4a1bRD",
"obfuscated_key_9": "%offlineKL%",
"obfuscated_key_10": "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",
"obfuscated_key_11": "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",
"obfuscated_key_12": "false",
"obfuscated_key_13": "null",
"obfuscated_key_14": "true",
"obfuscated_key_15": "null",
"obfuscated_key_16": "3",
"obfuscated_key_17": "Default"
}
}