MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 41f893a07eabc7494ac541ee87eab00b852f27a5192196bc1e89fceed1d4eaef. 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: 20

Intelligence 20 IOCs YARA 25 File information Comments

SHA256 hash:	41f893a07eabc7494ac541ee87eab00b852f27a5192196bc1e89fceed1d4eaef
SHA3-384 hash:	99f4efce1b0f5e749aae3ad5decdb7333fcb779925d72370f580185ff41d940784f281abb913826a943eeb24bed31f10
SHA1 hash:	99f4a90e137681433458df0ea2369295114c2657
MD5 hash:	cde57d3c6ebee8b62736fcceafee3b7f
humanhash:	speaker-winner-edward-maryland
File name:	CustomResolutionUtility_Setup.exe
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	46'592 bytes
First seen:	2025-12-30 22:37:40 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'611 x Formbook, 12'242 x SnakeKeylogger)
ssdeep	768:3uCGNTdxtrhWU5nGLmo2qrqKASwbwoaJwKSyi5PI9zjb7gXsi+JumZBDZCd:3uCGNTdri2vKASwbuaCX93bEXJ+JumHC
TLSH	T10B232A003BE9812BF2BE4FB8A9F21145857EF6673603D64E1CC4419B5613FC69A42AFD
TrID	67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 9.7% (.EXE) Win64 Executable (generic) (10522/11/4) 6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika	pebin
Reporter	Anonymous
Tags:	AsyncRAT botnet c2 exe RAT

Intelligence

File Origin

# of uploads :

# of downloads :

101

Origin country :

Vendor Threat Intelligence

Malware configuration found for:

AsyncRAT

Details

AsyncRAT

c2 socket addresses or a dead drop resolver url, a version, a mutex, an SSL certificate and server signature, an interval, varying flags, and possibly a filepath and a group

Link:

https://research.acce.ciphertechsolutions.com/results/1b446afe-16cd-4892-aa42-8b22067f4a8d/

Malware family:

asyncrat

ID:

File name:

CustomResolutionUtility_Setup.exe

Verdict:

Malicious activity

Analysis date:

2025-12-30 22:38:58 UTC

Tags:

auto-reg asyncrat

Link:

https://app.any.run/tasks/d006a431-a8de-4b27-ad4f-87d6b3ec2c92

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/46603/

Detection(s):

Win.Packed.Razy-9625918-0

Win.Packed.AsyncRAT-9856570-1

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=69545456d2357cccc3de08c4

Tags:

asyncrat autorun

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm asyncrat asyncrat base64 fareit fingerprint lolbin obfuscated razy reconnaissance reg samas schtasks vbnet

Link:

https://www.filescan.io/uploads/695454557d55b68cb20c8b7c/reports/24ebd58b-89fc-4534-a4ce-b35ee2d98c9e/overview

Verdict:

Malicious

Labled as:

AsyncRAT.Marte.B.Generic

Link:

https://www.hybrid-analysis.com/sample/41f893a07eabc7494ac541ee87eab00b852f27a5192196bc1e89fceed1d4eaef

Verdict:

Malicious

File Type:

exe x32

First seen:

2025-12-30T19:48:00Z UTC

Last seen:

2025-12-30T23:28:00Z UTC

Hits:

~10

Detections:

Backdoor.MSIL.Crysan.sb Backdoor.MSIL.Crysan.d Backdoor.MSIL.Crysan.c Backdoor.MSIL.Crysan.b PDM:Trojan.Win32.Tasker.cust PDM:Trojan.Win32.Generic HEUR:Trojan.Win32.Generic HEUR:Backdoor.MSIL.SheetRat.gen HEUR:Backdoor.MSIL.Crysan.gen

Link:

https://opentip.kaspersky.com/41f893a07eabc7494ac541ee87eab00b852f27a5192196bc1e89fceed1d4eaef/results?tab=lookup

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/16fb8235-0b37-422f-b00b-763c0d740c63

Score:

98%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/41f893a07eabc7494ac541ee87eab00b852f27a5192196bc1e89fceed1d4eaef

Verdict:

njRat

YARA:

14 match(es)

Tags:

.Net AsyncRAT Executable Managed .NET njRat PE (Portable Executable) PE File Layout RAT SOS: 0.21 Win 32 Exe x86

Malware Config

C2 Extraction:

PORT: 80,443,5555,6606,8000,8080,8443

Link:

https://app.malva.re/file/cde57d3c6ebee8b62736fcceafee3b7f

Detection:

asyncrat

Link:

https://mwdb.cert.pl/sample/41f893a07eabc7494ac541ee87eab00b852f27a5192196bc1e89fceed1d4eaef/

Verdict:

Malicious

Threat:

Family.ASYNCRAT

Link:

https://tip.neiki.dev/file/41f893a07eabc7494ac541ee87eab00b852f27a5192196bc1e89fceed1d4eaef

Threat name:

ByteCode-MSIL.Backdoor.AsyncRAT

Status:

Malicious

First seen:

2025-12-30 22:38:13 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

23 of 24 (95.83%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=ih4jhid6vpdusswfihxip2vqbocs6j5fdeqznpa6rh6o5uou5lxq._file

Verdict:

malicious

Label(s):

asyncrat

Similar samples:

error

AsyncRAT

Gathering data

Verdict:

Malicious

Tags:

rat asyncrat Win.Packed.Razy-9625918-0

YARA:

AsyncRat_Payload JPCERTCC_Asyncrat Windows_Generic_Threat_ce98c4bc asyncrat malware_asyncrat win_asyncrat_unobfuscated

Link:

https://app.threat.zone/submission/5d2f6636-e6c9-456a-9528-9ad744b42908

Unpacked files

SH256 hash:

41f893a07eabc7494ac541ee87eab00b852f27a5192196bc1e89fceed1d4eaef

MD5 hash:

cde57d3c6ebee8b62736fcceafee3b7f

SHA1 hash:

99f4a90e137681433458df0ea2369295114c2657

Detections:

win_asyncrat_w0

AsyncRAT

Link:

https://www.unpac.me/results/9dc42a30-c723-40bd-9524-b6f6f94ea175/

Malware family:

AsyncRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/41f893a07eab/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/41f893a07eabc7494ac541ee87eab00b852f27a5192196bc1e89fceed1d4eaef

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:	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:	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:	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)