MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a91638f920f9f47a7eb83352ae426349ea5ab748720e2fd3ae196bdc5b035eff. 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: 12

Intelligence 12 IOCs YARA 1 File information Comments

SHA256 hash:	a91638f920f9f47a7eb83352ae426349ea5ab748720e2fd3ae196bdc5b035eff
SHA3-384 hash:	c48153c9a9eda0653e30645d6cc8fc5ff1d6937338a2dbf9f53bb25bde725e5fb08ea9a1acbfcbc457ab9ec98b90a9ac
SHA1 hash:	2e4735bcd5856b86d113ebd1a70e1d0c2acbb719
MD5 hash:	ea85aa1bc9c253b33937e59b69276073
humanhash:	cold-idaho-south-wolfram
File name:	sostener1.vbs
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	2'479'096 bytes
First seen:	2025-08-19 05:21:31 UTC
Last seen:	Never
File type:	vbs
MIME type:	text/plain
ssdeep	768:cqqq9qqq9qqq9qqqdqqq9qqq9qqq9qqqCqqq9qqq9qqq9qqqdqqq9qqq9qqq9qqs:rF/D
Threatray	1'767 similar samples on MalwareBazaar
TLSH	T1BEB53A07D6968034FE64C6C15FE228F3C5AA2F0D26448FEE48439C64B4797F17994ABB
TrID	66.6% (.TXT) Text - UTF-16 (LE) encoded (2000/1) 33.3% (.MP3) MP3 audio (1000/1)
Magika	mp3
Reporter	abuse_ch
Tags:	AsyncRAT vbs

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/22041/

Detection(s):

SecuriteInfo.com.GT.VB.Honolulu.1.8AC35E3E.24746.17517.UNOFFICIAL

Verdict:

Malicious

Score:

92.5%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68a40a59c2f5296a1a284060

Tags:

obfuscate asyncrat xtreme shell

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

base64 base64 evasive obfuscated powershell

Link:

https://www.filescan.io/uploads/68a40a4e419c816a6e8b70c7/reports/c146cdea-6180-46fd-b609-c56effca8f33/overview

Verdict:

Malicious

Labled as:

GT:VB.Honolulu.1

Link:

https://www.hybrid-analysis.com/sample/a91638f920f9f47a7eb83352ae426349ea5ab748720e2fd3ae196bdc5b035eff

Result

Threat name:

AsyncRAT, Dacic, DcRat

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1759871

Signature

.NET source code contains potential unpacker

.NET source code references suspicious native API functions

Bypasses PowerShell execution policy

C2 URLs / IPs found in malware configuration

Encrypted powershell cmdline option found

Found malware configuration

Found suspicious powershell code related to unpacking or dynamic code loading

Injects a PE file into a foreign processes

Joe Sandbox ML detected suspicious sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Potential dropper URLs found in powershell memory

Sample uses string decryption to hide its real strings

Sigma detected: Base64 Encoded PowerShell Command Detected

Sigma detected: Potential PowerShell Command Line Obfuscation

Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet

Sigma detected: Script Interpreter Execution From Suspicious Folder

Sigma detected: Suspicious Script Execution From Temp Folder

Sigma detected: WScript or CScript Dropper

Suricata IDS alerts for network traffic

Suspicious execution chain found

Suspicious powershell command line found

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

Uses dynamic DNS services

VBScript performs obfuscated calls to suspicious functions

Windows Scripting host queries suspicious COM object (likely to drop second stage)

Writes to foreign memory regions

Wscript starts Powershell (via cmd or directly)

Yara detected AsyncRAT

Yara detected Dacic

Yara detected DcRat

Yara detected Generic Downloader

Behaviour

Behavior Graph:

Download SVG

Score:

99%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/a91638f920f9f47a7eb83352ae426349ea5ab748720e2fd3ae196bdc5b035eff

Gathering data

Detection:

dcrat

Link:

https://mwdb.cert.pl/sample/a91638f920f9f47a7eb83352ae426349ea5ab748720e2fd3ae196bdc5b035eff/

Threat name:

Script-WScript.Backdoor.AsyncRAT

Status:

Malicious

First seen:

2025-08-18 19:47:26 UTC

File Type:

Text (VBS)

AV detection:

8 of 24 (33.33%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=veldr6ja7h2hu7vygnjk4qtdjhvfvn2ioihc7u5odfv5ywydl37q._file

Result

Malware family:

asyncrat

Score:

10/10

Tags:

family:asyncrat botnet:11111 defense_evasion discovery execution rat

Link:

https://tria.ge/reports/250819-f3ch1azrx9/

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

Blocklisted process makes network request

Modifies trusted root certificate store through registry

AsyncRat

Asyncrat family

Malware Config

C2 Extraction:

oficios2026.duckdns.org:1111

Dropper Extraction:

https://store-na-phx-1.gofile.io/download/direct/dfaca5c3-f89a-4550-8eed-3e9bd5716e4d/DllSkys.txt

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/a91638f920f9f47a7eb83352ae426349ea5ab748720e2fd3ae196bdc5b035eff

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:	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)