MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 51f3f7d8ac847527e0652b7841b3f37844b24f1e5b206af23debd479b8aa6a86. 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: 16

Intelligence 16 IOCs YARA 24 File information Comments

SHA256 hash:	51f3f7d8ac847527e0652b7841b3f37844b24f1e5b206af23debd479b8aa6a86
SHA3-384 hash:	95c40b73e935e6f8a0f1d27e077e89be2a5ca637abfc44d8050cd7a98dfd3c5ea22107d8ab25359bc1d3461871cb7eef
SHA1 hash:	f7fb4b05e98fff19289f6ba090fcb5384f0dbc89
MD5 hash:	503d8173c0d8d38e05dead2de759a1d4
humanhash:	winter-pip-fillet-maryland
File name:	503d8173c0d8d38e05dead2de759a1d4.exe
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	46'080 bytes
First seen:	2024-05-09 22:55:20 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'659 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep	768:puwpFTAY3IQWUe9jqmo2qLoKjPGaG6PIyzjbFgX3i2XXf9r1BDZ6x:puwpFTA4/2xKTkDy3bCXSIXl3d6x
Threatray	2'940 similar samples on MalwareBazaar
TLSH	T18C232B003BE8822BF2BE5F7898F26245857AF6A32603D5491CC451D75623FC6DA436FE
TrID	60.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.8% (.SCR) Windows screen saver (13097/50/3) 8.7% (.EXE) Win64 Executable (generic) (10523/12/4) 5.4% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
Reporter	abuse_ch
Tags:	AsyncRAT exe RAT

abuse_ch

AsyncRAT C2:
84.247.154.81:8808

Intelligence

File Origin

# of uploads :

# of downloads :

421

Origin country :

Vendor Threat Intelligence

Malware family:

asyncrat

ID:

File name:

51f3f7d8ac847527e0652b7841b3f37844b24f1e5b206af23debd479b8aa6a86.exe

Verdict:

Malicious activity

Analysis date:

2024-05-09 22:58:14 UTC

Tags:

rat asyncrat remote

Link:

https://app.any.run/tasks/4493f7f3-6a43-40d7-bc86-b5e754adf77b

Note:

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

Detection(s):

Win.Packed.Razy-9625918-0

Win.Packed.AsyncRAT-9856570-1

Win.Packed.AsyncRAT-9861056-1

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Сreating synchronization primitives

Using the Windows Management Instrumentation requests

Running batch commands

Creating a process with a hidden window

Creating a file in the %AppData% directory

Creating a file in the %temp% directory

Creating a file

Launching a process

Creating a process from a recently created file

Creating a window

Connection attempt

Sending a custom TCP request

Unauthorized injection to a recently created process

Enabling autorun by creating a file

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm asyncrat asyncrat config-extracted fareit lolbin njrat rat razy reg samas schtasks

Link:

https://www.filescan.io/uploads/663d5486f55673e065ace396/reports/be48a70e-4914-44c4-9e50-e880550a5a7b/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/51f3f7d8ac847527e0652b7841b3f37844b24f1e5b206af23debd479b8aa6a86

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/87f1980a-cd82-4ed0-91cb-26b0a1e255a7

Result

Threat name:

AsyncRAT

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1439231

Signature

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)

Drops PE files with benign system names

Found malware configuration

Machine Learning detection for dropped file

Machine Learning detection for 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

Sigma detected: Files With System Process Name In Unsuspected Locations

Sigma detected: Invoke-Obfuscation CLIP+ Launcher

Sigma detected: Invoke-Obfuscation VAR+ Launcher

Sigma detected: Schedule system process

Sigma detected: Suspect Svchost Activity

Sigma detected: System File Execution Location Anomaly

Snort IDS alert for network traffic

System process connects to network (likely due to code injection or exploit)

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

Yara detected Generic Downloader

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/51f3f7d8ac847527e0652b7841b3f37844b24f1e5b206af23debd479b8aa6a86

Detection:

asyncrat

Link:

https://mwdb.cert.pl/sample/51f3f7d8ac847527e0652b7841b3f37844b24f1e5b206af23debd479b8aa6a86/

Threat name:

ByteCode-MSIL.Backdoor.AsyncRAT

Status:

Malicious

First seen:

2024-05-06 12:04:48 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

32 of 38 (84.21%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=khz7pwfmqr2spydffn4edm7tpbclety6lmqgv4r55pkhtofknkda._file

Verdict:

malicious

Label(s):

asyncrat

AsyncRAT

13f53967b03017371c9385a4266b5f3169afe48e933a5cbbf95f24843c05f376

AsyncRAT

4a72f887ce916e9eaef552c54fdcdc51dd610b3b5c92528956341281bdcbed82

AsyncRAT

512eae984c0fd479fdcd2f73253fc52adeed18d104dff390b5b9563b3ca8dff5

AsyncRAT

51f3f7d8ac847527e0652b7841b3f37844b24f1e5b206af23debd479b8aa6a86

AsyncRAT

8545fedaeb113fdb4000b3f6a8d0f0f4694f9198203086a7d1230385a5180f78

AsyncRAT

85b4167417d416880d3e9f1ff438e1e5b125ceb28de4e3ebd9b5725717815157

AsyncRAT

8737b9c5969931c61500427c301c40e635acec433bd4450e1dca9f202e97fb6f

AsyncRAT

+ 2'930 additional samples on MalwareBazaar

Result

Malware family:

asyncrat

Score:

10/10

Tags:

family:asyncrat botnet:default rat

Link:

https://tria.ge/reports/240509-2wnhksbe9t/

Behaviour

Creates scheduled task(s)

Delays execution with timeout.exe

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Async RAT payload

AsyncRat

Malware Config

C2 Extraction:

84.247.154.81:6606
84.247.154.81:7707
84.247.154.81:8808

Unpacked files

SH256 hash:

51f3f7d8ac847527e0652b7841b3f37844b24f1e5b206af23debd479b8aa6a86

MD5 hash:

503d8173c0d8d38e05dead2de759a1d4

SHA1 hash:

f7fb4b05e98fff19289f6ba090fcb5384f0dbc89

Detections:

AsyncRAT

win_asyncrat_w0

INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse

asyncrat

Link:

https://www.unpac.me/results/b3d7676d-ea44-4f59-b8b5-f9b0e8ec5d45/

Malware family:

AsyncRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/51f3f7d8ac84/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/51f3f7d8ac847527e0652b7841b3f37844b24f1e5b206af23debd479b8aa6a86

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

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
Description:	detect AsyncRat in memory
Reference:	https://github.com/NYAN-x-CAT/AsyncRAT-C-Sharp

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

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:	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:	Windows_Generic_Threat_ce98c4bc Create hunting rule
Author:	Elastic Security

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_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)

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.

Web download

AsyncRAT

exe 51f3f7d8ac847527e0652b7841b3f37844b24f1e5b206af23debd479b8aa6a86

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/2845012/

Delivery method

Distributed via web download

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high

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