MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4a3b8ecf4ad2fb359346c0c4b6be203c3b9ba719a318786be71ba75da0228e87. 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

AsyncRAT

Vendor detections: 10

Intelligence 10 IOCs YARA 24 File information Comments

SHA256 hash:	4a3b8ecf4ad2fb359346c0c4b6be203c3b9ba719a318786be71ba75da0228e87
SHA3-384 hash:	9f5fcc13a6134efba2e9cc30b71a6b63288cbebcb179a055794b2eb2ae7f3aee278a6f7a49257f9cee215d9110eab156
SHA1 hash:	8341052f04493c5d6d3a770f554e38ad5069873a
MD5 hash:	7ec59a5f9d410aa47a06fce78d6e9365
humanhash:	iowa-sierra-queen-mississippi
File name:	sostener1.vbs
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	2'479'176 bytes
First seen:	2025-08-27 12:26:09 UTC
Last seen:	Never
File type:	vbs
MIME type:	text/plain
ssdeep	96:2///h///h///h///h///h///h///h///2///h///h///h///h///h///h///h//M:q3w+1EhWnGxZbQHd0thbG
TLSH	T10FB55F2E3F43A0BC3C39F2A9165DB9A06756B6793A77CC4688CF4A4D3C69DF10D20961
TrID	66.6% (.TXT) Text - UTF-16 (LE) encoded (2000/1) 33.3% (.MP3) MP3 audio (1000/1)
Magika	vba
Reporter	Joker
Tags:	AsyncRAT GuLoader vbs

Intelligence

File Origin

# of uploads :

# of downloads :

121

Origin country :

Vendor Threat Intelligence

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/23878/

Verdict:

Malicious

Score:

94.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68aef9913e988eb6ab82ceac

Tags:

obfuscate asyncrat xtreme shell

Verdict:

Unknown

Threat level:

2.5/10

Confidence:

100%

Link:

https://www.filescan.io/uploads/68aef9c51c81c34281d53dba/reports/a1749313-5b39-47ab-8180-8d45caabc3c8/overview

Verdict:

Malicious

Labled as:

GT:VB.Honolulu.1

Link:

https://www.hybrid-analysis.com/sample/4a3b8ecf4ad2fb359346c0c4b6be203c3b9ba719a318786be71ba75da0228e87

Verdict:

Malicious

File Type:

unknown

Link:

https://opentip.kaspersky.com/4a3b8ecf4ad2fb359346c0c4b6be203c3b9ba719a318786be71ba75da0228e87/results?tab=lookup

Score:

97%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/4a3b8ecf4ad2fb359346c0c4b6be203c3b9ba719a318786be71ba75da0228e87

Gathering data

Detection:

dcrat

Link:

https://mwdb.cert.pl/sample/4a3b8ecf4ad2fb359346c0c4b6be203c3b9ba719a318786be71ba75da0228e87/

Threat name:

Script-WScript.Trojan.GuLoader

Status:

Malicious

First seen:

2025-08-27 12:27:42 UTC

File Type:

Text (VBS)

AV detection:

7 of 24 (29.17%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=ji5y5t2k2l5tle2gydclnprahq5zxjyzummhq27hdotv3ibcr2dq._file

Result

Malware family:

asyncrat

Score:

10/10

Tags:

family:asyncrat botnet:llegan1111 defense_evasion discovery execution rat

Link:

https://tria.ge/reports/250827-pm43razvgx/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Command and Scripting Interpreter: PowerShell

Checks computer location settings

Badlisted process makes network request

Modifies trusted root certificate store through registry

AsyncRat

Asyncrat family

Malware Config

C2 Extraction:

enviosenvios8899.duckdns.org:1111

Dropper Extraction:

https://www.dropbox.com/scl/fi/wodfuzrbz0pc7kkc3yl2u/dll.txt?rlkey=erzuh647o5ctzdnc0j1sgw83v&st=2st75vf5&dl=1

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/4a3b8ecf4ad2fb359346c0c4b6be203c3b9ba719a318786be71ba75da0228e87

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:	AcRat Create hunting rule
Author:	Nikos 'n0t' Totosis
Description:	AcRat Payload (based on AsyncRat)

Rule name:	CP_AllMal_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication

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:	dcrat Create hunting rule
Author:	jeFF0Falltrades

Rule name:	dcrat_kingrat Create hunting rule
Author:	jeFF0Falltrades

Rule name:	dcrat_rkp Create hunting rule
Author:	jeFF0Falltrades
Description:	Detects DCRat payloads

Rule name:	INDICATOR_SUSPICIOUS_EXE_B64_Artifacts Create hunting rule
Author:	ditekSHen
Description:	Detects executables embedding bas64-encoded APIs, command lines, registry keys, etc.

Rule name:	INDICATOR_SUSPICIOUS_EXE_DcRatBy Create hunting rule
Author:	ditekSHen
Description:	Detects executables containing the string DcRatBy

Rule name:	INDICATOR_SUSPICIOUS_EXE_WMI_EnumerateVideoDevice Create hunting rule
Author:	ditekSHen
Description:	Detects executables attemping to enumerate video devices using WMI

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_WIN_AsyncRat_RAT_PE Create hunting rule
Author:	Phatcharadol Thangplub
Description:	Use to detect AsyncRAT implant.

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:	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_Generic_Threat_ce98c4bc Create hunting rule
Author:	Elastic Security

Rule name:	Windows_Trojan_DCRat_1aeea1ac Create hunting rule
Author:	Elastic Security

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