MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 81bbf492816fdf74123d81ae5f01d85764f9be418fe4930e7c569fcdff1b3787. 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: 14

Intelligence 14 IOCs YARA 14 File information Comments

SHA256 hash:	81bbf492816fdf74123d81ae5f01d85764f9be418fe4930e7c569fcdff1b3787
SHA3-384 hash:	761e7e1722d519a1f6f46549ccb8983a1d3e242679cea13eaaae538f998ca57abc99e47c71c270f8f652583f1ff1348a
SHA1 hash:	9d04d51e0aaebd285158afb51fbc7ffbc649f636
MD5 hash:	30378680f9c2d3b061ef60040018c4f1
humanhash:	bluebird-speaker-mountain-connecticut
File name:	bScr.exe
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	48'640 bytes
First seen:	2023-12-01 16:07:46 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep	768:4q+s3pUtDILNCCa+DiptelDSN+iV08YbygeGfjYz4dCvEgK/JvZVc6KN:4q+AGtQOptKDs4zb1RjYzMCnkJvZVclN
Threatray	56 similar samples on MalwareBazaar
TLSH	T121235D4037D88136F2BD47B4ADF2E64582B9E2676903CB5D6CC814EA1B13BC596036FE
TrID	40.9% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 32.2% (.CPL) Windows Control Panel Item (generic) (57583/11/19) 7.3% (.SCR) Windows screen saver (13097/50/3) 5.8% (.EXE) Win64 Executable (generic) (10523/12/4) 3.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
Reporter	pmelson
Tags:	AsyncRAT DCRat exe

Intelligence

File Origin

# of uploads :

# of downloads :

372

Origin country :

Vendor Threat Intelligence

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/461738/

Detection(s):

Sanesecurity.Malware.29669.UNOFFICIAL

Win.Malware.Generickdz-9865912-0

Win.Malware.Enigmaprotector-9874743-0

Win.Malware.Enigmaprotector-9881027-0

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

DNS request

Sending a custom TCP request

Using the Windows Management Instrumentation requests

Creating a window

Running batch commands

Launching a process

Verdict:

Malicious

Labled as:

Backdoo.1BBEAE4C

Link:

https://www.hybrid-analysis.com/sample/81bbf492816fdf74123d81ae5f01d85764f9be418fe4930e7c569fcdff1b3787

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:

AsyncRAT

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/601dc1fb-4ab9-47cb-a030-940b4f107e95

Result

Threat name:

AsyncRAT, DcRat

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1351535

Behaviour

Behavior Graph:

n/a

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/81bbf492816fdf74123d81ae5f01d85764f9be418fe4930e7c569fcdff1b3787

Detection:

dcrat

Link:

https://mwdb.cert.pl/sample/81bbf492816fdf74123d81ae5f01d85764f9be418fe4930e7c569fcdff1b3787/

Threat name:

ByteCode-MSIL.Backdoor.AsyncRAT

Status:

Malicious

First seen:

2023-12-01 16:08:05 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

21 of 23 (91.30%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=qg57jeubn7pxier5qgxf6aoyk5sptpsbr7sjgdt4k2p437y3g6dq._file

Verdict:

malicious

Label(s):

asyncrat

Result

Malware family:

asyncrat

Score:

10/10

Tags:

family:asyncrat botnet:ivan-dici-1 rat

Link:

https://tria.ge/reports/231201-tk7s3sdd9t/

Behaviour

Delays execution with timeout.exe

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Deletes itself

Async RAT payload

AsyncRat

Malware Config

C2 Extraction:

varo12l.duckdns.org:8523

Unpacked files

SH256 hash:

81bbf492816fdf74123d81ae5f01d85764f9be418fe4930e7c569fcdff1b3787

MD5 hash:

30378680f9c2d3b061ef60040018c4f1

SHA1 hash:

9d04d51e0aaebd285158afb51fbc7ffbc649f636

Detections:

DCRat

INDICATOR_SUSPICIOUS_EXE_WMI_EnumerateVideoDevice

win_asyncrat_unobfuscated

INDICATOR_SUSPICIOUS_EXE_DcRatBy

INDICATOR_SUSPICIOUS_EXE_B64_Artifacts

Link:

https://www.unpac.me/results/b6e7526e-b438-4285-b835-cb78ed585b37/

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/81bbf492816fdf74123d81ae5f01d85764f9be418fe4930e7c569fcdff1b3787

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:	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:	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:	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)