MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d66af8fb064d5606405675e1f610ebf62bf3caefed5347e1a6b24cfd0faac7dd. 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: 21


Intelligence 21 IOCs YARA 25 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d66af8fb064d5606405675e1f610ebf62bf3caefed5347e1a6b24cfd0faac7dd
SHA3-384 hash: 0dbc15353593134d33915c498195d8d64d76783cf8161aeb530d2f4eb4f30542072cf0d01503eeb137203a27ed60e058
SHA1 hash: e3a826ded224f617be08ee0a0ae64ca20b89cdce
MD5 hash: efb464936649cf2066718807f1121e3f
humanhash: one-lima-uncle-bravo
File name:firefox.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:46'592 bytes
First seen:2025-12-23 15:46:35 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 768:ru66dT9slTJWUhDuzmo2qLFO5QSCBzHSNjPI7zjbDgX3iHcPsOXSVuHZ3DBDZKw:ru66dT9We2WO59ESK73bcXSHcPsm5HZ9
Threatray 1'761 similar samples on MalwareBazaar
TLSH T1D8233B003BED812BF2BE4F7899F22145467AB6633603E54E2CC451975713FC69A42AFE
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 Kaitokib
Tags:AsyncRAT botnet c2 exe RAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
80
Origin country :
HK HK
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/f95d7586-ddef-4bc1-8497-394b0b3edae6/
Malware family:
asyncrat
Create hunting rule
ID:
1
File name:
firefox.exe
Verdict:
Malicious activity
Analysis date:
2025-12-23 16:19:16 UTC
Tags:
auto-reg asyncrat rat
Link:
https://app.any.run/tasks/7e51f7a2-4662-4df6-b41b-398f8872fe56

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
AsyncRAT
Create hunting rule
Link:
https://www.capesandbox.com/analysis/45871/
Detection(s):
Win.Packed.Razy-9625918-0
Create hunting rule

Win.Packed.AsyncRAT-9856570-1
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=694ac10901c7b4a8fe551acc
Tags:
asyncrat autorun
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm asyncrat base64 config-extracted fingerprint lolbin obfuscated reconnaissance reg schtasks vbnet
Link:
https://www.filescan.io/uploads/694ac104e126b9ff438e977a/reports/15b21b75-2c7c-4eb0-9093-50a0c8e2718e/overview
Verdict:
Malicious
Labled as:
AsyncRAT.Marte.B.Generic
Link:
https://www.hybrid-analysis.com/sample/d66af8fb064d5606405675e1f610ebf62bf3caefed5347e1a6b24cfd0faac7dd
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-12-23T13:10:00Z UTC
Last seen:
2025-12-23T16:59:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.MSIL.Crysan.gen Backdoor.MSIL.Crysan.sb Backdoor.MSIL.Crysan.d Backdoor.MSIL.Crysan.c Backdoor.MSIL.Crysan.b PDM:Trojan.Win32.Generic HEUR:Trojan.Win32.Generic HEUR:Backdoor.MSIL.SheetRat.gen
Link:
https://opentip.kaspersky.com/d66af8fb064d5606405675e1f610ebf62bf3caefed5347e1a6b24cfd0faac7dd/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/054271df-a308-442d-a3c4-c5d7ef185eec
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/d66af8fb064d5606405675e1f610ebf62bf3caefed5347e1a6b24cfd0faac7dd
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
Link:
https://app.malva.re/file/efb464936649cf2066718807f1121e3f
Detection:
asyncrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/d66af8fb064d5606405675e1f610ebf62bf3caefed5347e1a6b24cfd0faac7dd/
Verdict:
Malicious
Threat:
Family.ASYNCRAT
Link:
https://tip.neiki.dev/file/d66af8fb064d5606405675e1f610ebf62bf3caefed5347e1a6b24cfd0faac7dd
Threat name:
ByteCode-MSIL.Backdoor.AsyncRAT
Create hunting rule
Status:
Malicious
First seen:
2025-12-23 16:19:18 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
23 of 24 (95.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2zvpr6ygjvlamqcwoxq7mehl6yv7hsxp5vjupyngwjgp2d5ky7oq._file
Verdict:
malicious
Label(s):
asyncrat
Create hunting rule
Similar samples:
565233cc8e4de34e543ed83307c22a381888cb10ce1c0e8059def7f55aa0df9d
AsyncRAT
5659b4ea8582b110707f84728ceeb09d22e72c0f729a02d6d73dbf268b2397bd
AsyncRAT
5e088f3ae8bf2631e5aaa8de2facd537a65ef5e269924213e14ee41d94b6a446
AsyncRAT
7c8c576731dd13174bd9289726bc59c98fa0db27515da65d5f3434c5c2921d02
AsyncRAT
7f14cf5740bb204942ae69690aea4bb17dea9bee17323311a6613c766a716b24
AsyncRAT
b2abe1af5fe4b3891a3dc402af96d3ea32ac5e002370fc263060ff4ce8675332
AsyncRAT
error
AsyncRAT
+ 1'751 additional samples on MalwareBazaar
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat botnet:default defense_evasion discovery execution persistence rat
Link:
https://tria.ge/reports/251223-twshjawpd1/
Behaviour
Delays execution with timeout.exe
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Checks computer location settings
Executes dropped EXE
Async RAT payload
AsyncRat
Asyncrat family
Malware Config
C2 Extraction:
koz2.in.net:6606
koz2.in.net:7707
koz2.in.net:8808
koz2.in.net:443
koz2.in.net:80
download.koz2.in.net:6606
download.koz2.in.net:7707
download.koz2.in.net:8808
download.koz2.in.net:443
download.koz2.in.net:80
api.koz2.in.net:6606
api.koz2.in.net:7707
api.koz2.in.net:8808
api.koz2.in.net:443
api.koz2.in.net:80
www.koz2.in.net:6606
www.koz2.in.net:7707
www.koz2.in.net:8808
www.koz2.in.net:443
www.koz2.in.net:80
logs.koz2.in.net:6606
logs.koz2.in.net:7707
logs.koz2.in.net:8808
logs.koz2.in.net:443
logs.koz2.in.net:80
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/814a9f0d-f971-4ccb-84e5-bb4589446c7b
Unpacked files
SH256 hash:
d66af8fb064d5606405675e1f610ebf62bf3caefed5347e1a6b24cfd0faac7dd
MD5 hash:
efb464936649cf2066718807f1121e3f
SHA1 hash:
e3a826ded224f617be08ee0a0ae64ca20b89cdce
Detections:
win_asyncrat_w0
Create hunting rule
AsyncRAT
Create hunting rule
Link:
https://www.unpac.me/results/71686c67-46b0-47bf-b91a-5e62cc3638b6/
Malware family:
AsyncRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/d66af8fb064d/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/d66af8fb064d5606405675e1f610ebf62bf3caefed5347e1a6b24cfd0faac7dd

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)
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

Executable exe d66af8fb064d5606405675e1f610ebf62bf3caefed5347e1a6b24cfd0faac7dd

(this sample)

  
Link
https://yaraify.abuse.ch/scan/results/ee02426b-e011-11f0-9df4-42010aa4000b
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/45871/

Comments