MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c84a91d4261563b4171103a1d72a3f86f48ec2eaca6e43d7f217bdcbc877124d. 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: 19


Intelligence 19 IOCs YARA 26 File information Comments
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SHA256 hash: c84a91d4261563b4171103a1d72a3f86f48ec2eaca6e43d7f217bdcbc877124d
SHA3-384 hash: 4043363153e05a225d6ee8549fa64bae6f171d09480b13e776a6b4bec81f92783a086bcc15d5d1bf9eb455eb944b1c67
SHA1 hash: 44fb185950925ca2fcb469fbedaceee0a451cbca
MD5 hash: da0c2ab9e92a4d36b177ae380e91feda
humanhash: cat-timing-illinois-kitten
File name:AsyncClient.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:48'640 bytes
First seen:2024-12-13 10:29:17 UTC
Last seen:2024-12-17 06:11:33 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 768:ku/dRTUo0HQbWUnmjSmo2qMOdvbvAaQ9+EUMpPPI4/AWXXz0bjx+IBE8IIC6sGBo:ku/dRTUPE2ovbVWSQAWXX4bjgF8AIdgx
TLSH T1F1233C003BE9812BF6BE4F7869F32145857AF2677603D50D2CC451DB5B23FC29A426EA
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 lontze7
Tags:AsyncRAT exe

Intelligence

File Origin
# of uploads :
2
# of downloads :
304
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
asyncrat
Create hunting rule
ID:
1
File name:
c84a91d4261563b4171103a1d72a3f86f48ec2eaca6e43d7f217bdcbc877124d
Verdict:
Malicious activity
Analysis date:
2024-12-13 00:12:39 UTC
Tags:
asyncrat
Link:
https://app.any.run/tasks/214e91d4-febc-47df-bd52-1e971cd939bf

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Packed.Razy-9625918-0
Create hunting rule

Win.Packed.AsyncRAT-9861056-1
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=675c0dde259e5b60544ed926
Tags:
asyncrat autorun
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Connection attempt
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Creating a file in the %temp% directory
Running batch commands
Creating a process with a hidden window
Creating a process from a recently created file
Creating a window
Launching a process
Creating a file in the %AppData% subdirectories
Searching for the window
Forced system process termination
Changing a file
Creating a file
Creating a file in the %AppData% directory
DNS request
Sending an HTTP GET request
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm asyncrat lolbin njrat obfuscated rat reg schtasks vbnet
Link:
https://www.filescan.io/uploads/675c0cb32fbd4734043016b9/reports/b9bbb37b-dc8f-41b4-8f20-eef4472a5c8c/overview
Verdict:
Malicious
Labled as:
Trojan.Mardom.MN.Generic
Link:
https://www.hybrid-analysis.com/sample/c84a91d4261563b4171103a1d72a3f86f48ec2eaca6e43d7f217bdcbc877124d
Result
Verdict:
MALICIOUS
Malware family:
Icarus Stealer
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/f695ca08-e9b3-49c5-b678-6e6fdf5432b1
Result
Threat name:
AsyncRAT, HVNC, PureLog Stealer
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1574525
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains suspicious base64 encoded strings
.NET source code contains very large strings
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Bypasses PowerShell execution policy
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
Sigma detected: Explorer NOUACCHECK Flag
Sigma detected: Suspicious Script Execution From Temp Folder
Suricata IDS alerts for network traffic
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected AsyncRAT
Yara detected Generic Downloader
Yara detected HVNC
Yara detected Powershell download and execute
Yara detected PureLog Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1574525 Sample: AsyncClient.exe Startdate: 13/12/2024 Architecture: WINDOWS Score: 100 38 google.com 2->38 40 checkip.dyndns.org 2->40 42 2 other IPs or domains 2->42 54 Suricata IDS alerts for network traffic 2->54 56 Found malware configuration 2->56 58 Malicious sample detected (through community Yara rule) 2->58 60 15 other signatures 2->60 11 AsyncClient.exe 1 4 2->11         started        15 svchost.exe 1 1 2->15         started        17 explorer.exe 5 4 2->17         started        signatures3 process4 dnsIp5 44 82.64.156.123, 49704, 49706, 80 PROXADFR France 11->44 36 C:\Users\user\AppData\Local\Temp\hklugq.exe, PE32 11->36 dropped 19 cmd.exe 1 11->19         started        46 127.0.0.1 unknown unknown 15->46 file6 process7 signatures8 62 Suspicious powershell command line found 19->62 64 Bypasses PowerShell execution policy 19->64 22 powershell.exe 12 19->22         started        24 conhost.exe 19->24         started        process9 process10 26 hklugq.exe 5 22->26         started        signatures11 66 Antivirus detection for dropped file 26->66 68 Multi AV Scanner detection for dropped file 26->68 70 Machine Learning detection for dropped file 26->70 29 hklugq.exe 15 4 26->29         started        32 explorer.exe 26->32         started        process12 dnsIp13 48 checkip.dyndns.com 193.122.130.0, 49716, 80 ORACLE-BMC-31898US United States 29->48 50 google.com 172.217.17.78 GOOGLEUS United States 29->50 52 83.147.52.247, 49715, 80 CUBENODEES Spain 29->52 34 conhost.exe 29->34         started        process14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c84a91d4261563b4171103a1d72a3f86f48ec2eaca6e43d7f217bdcbc877124d
Detection:
asyncrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/c84a91d4261563b4171103a1d72a3f86f48ec2eaca6e43d7f217bdcbc877124d/
Threat name:
ByteCode-MSIL.Backdoor.AsyncRat
Create hunting rule
Status:
Malicious
First seen:
2024-12-12 13:08:38 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
33 of 38 (86.84%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=zbfjdvbgcvr3ifyraoq5okr7q32i5qxkzjxehv7sc664xsdxcjgq._file
Verdict:
malicious
Label(s):
asyncrat
Create hunting rule
Similar samples:
error
AsyncRAT
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat botnet:default discovery execution persistence rat
Link:
https://tria.ge/reports/241213-mjtfqsxmbn/
Behaviour
Checks SCSI registry key(s)
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Uses Volume Shadow Copy WMI provider
Uses Volume Shadow Copy service COM API
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Command and Scripting Interpreter: PowerShell
Suspicious use of SetThreadContext
Enumerates connected drives
Looks up external IP address via web service
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Boot or Logon Autostart Execution: Active Setup
AsyncRat
Asyncrat family
Malware Config
C2 Extraction:
82.64.156.123:80
Verdict:
Malicious
Tags:
rat asyncrat Win.Packed.Razy-9625918-0
YARA:
malware_asyncrat asyncrat AsyncRat_Payload JPCERTCC_Asyncrat
Link:
https://app.threat.zone/submission/1a170472-12fc-48d0-886b-885e8613d4ef
Unpacked files
SH256 hash:
c84a91d4261563b4171103a1d72a3f86f48ec2eaca6e43d7f217bdcbc877124d
MD5 hash:
da0c2ab9e92a4d36b177ae380e91feda
SHA1 hash:
44fb185950925ca2fcb469fbedaceee0a451cbca
Detections:
AsyncRAT
Create hunting rule
win_asyncrat_w0
Create hunting rule
Link:
https://www.unpac.me/results/8193f76d-ca67-44cc-bab6-7e1ac379f978/
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/c84a91d4261563b4171103a1d72a3f86f48ec2eaca6e43d7f217bdcbc877124d

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:JPCERT/CC Incident Response Group
Description:detect AsyncRat in memory
Reference:internal research
Rule name:AsyncRAT
Create hunting rule
Author:kevoreilly, JPCERT/CC Incident Response Group
Description:AsyncRAT Payload
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
Author:JPCERT/CC Incident Response Group
Description:detect AsyncRat in memory
Reference:internal research
Rule name:malware_asyncrat
Create hunting rule
Description:detect AsyncRat in memory
Reference:https://github.com/NYAN-x-CAT/AsyncRAT-C-Sharp
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:RansomPyShield_Antiransomware
Create hunting rule
Author:XiAnzheng
Description:Check for Suspicious String and Import combination that Ransomware mostly abuse(can create FP)
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_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_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 c84a91d4261563b4171103a1d72a3f86f48ec2eaca6e43d7f217bdcbc877124d

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3346848/

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
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments