MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6c3b8f706293d8462261afe66048575af6798cd0ebaec43f77a742609be0f869. 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: 12


Intelligence 12 IOCs 1 YARA 7 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6c3b8f706293d8462261afe66048575af6798cd0ebaec43f77a742609be0f869
SHA3-384 hash: 27ea2cdc42a2eec9343d522268c05bc03f1ccb35f698860e67ac7e1df978c70d24f68f3177e4c1d9421b2095bcf5e8d0
SHA1 hash: 2ea3eb5811d3edcb81037426def59f82b8009174
MD5 hash: a39ec61a10362618f29b30e22a3c003f
humanhash: sink-dakota-july-blue
File name:a39ec61a10362618f29b30e22a3c003f.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:3'400'896 bytes
First seen:2021-05-17 03:55:25 UTC
Last seen:2021-05-17 04:02:04 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:fDuREyB1NcbeKAkgSDyIGyzABWURLkAffc9CZVCAuqUhxfmbWE:LuSyB1ClgGl+f6+HsfQ
Threatray 995 similar samples on MalwareBazaar
TLSH F1F5E018BBEDCA12E2EE8779E8D1009097B5A953B143E7DF948417F92D03B819E0365F
Reporter abuse_ch
Tags:AsyncRAT exe RAT


Avatar
abuse_ch
AsyncRAT C2:
66.42.72.69:1337

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
66.42.72.69:1337 https://threatfox.abuse.ch/ioc/43798/

Intelligence

File Origin
# of uploads :
2
# of downloads :
139
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
MemorableClient.exe
Verdict:
Suspicious activity
Analysis date:
2021-05-14 20:27:54 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/b74625df-349d-4ead-bad6-8d007b12c745

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/157761/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a process from a recently created file
Running batch commands
Creating a process with a hidden window
Creating a file
Launching a process
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
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.
Result
Threat name:
AsyncRAT
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/783257
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Disables the Windows task manager (taskmgr)
Found malware configuration
Machine Learning detection for dropped file
Machine Learning detection for sample
May check the online IP address of the machine
Modifies Group Policy settings
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Query firmware table information (likely to detect VMs)
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AsyncRAT
Yara detected Defender Control Hacktool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 415653 Sample: WAnYq4Yh0Z.exe Startdate: 17/05/2021 Architecture: WINDOWS Score: 100 121 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->121 123 Found malware configuration 2->123 125 Antivirus detection for dropped file 2->125 127 10 other signatures 2->127 9 WAnYq4Yh0Z.exe 6 2->9         started        13 Runtime Broker.exe 2->13         started        16 Runtime Broker.exe 2->16         started        18 2 other processes 2->18 process3 dnsIp4 81 C:\Users\user\AppData\...\WAnYq4Yh0Z.exe, PE32 9->81 dropped 83 C:\Users\...\WAnYq4Yh0Z.exe:Zone.Identifier, ASCII 9->83 dropped 85 C:\Users\user\AppData\...\WAnYq4Yh0Z.exe.log, ASCII 9->85 dropped 149 Query firmware table information (likely to detect VMs) 9->149 151 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 9->151 20 WAnYq4Yh0Z.exe 17 9 9->20         started        25 cmd.exe 1 9->25         started        115 us-east-1.route-1.000webhost.awex.io 13->115 117 riftrebirth.000webhostapp.com 13->117 119 3 other IPs or domains 13->119 87 C:\Users\user\AppData\...\juscheduler.exe, PE32 13->87 dropped 89 C:\Users\user\...\VisualStudioUpdaterTmp.exe, PE32+ 13->89 dropped 91 Sink to receive as...ent application.exe, PE32 13->91 dropped 93 Sink to receive as...exe:Zone.Identifier, ASCII 13->93 dropped 95 C:\Users\user\AppData\...\Runtime Broker.exe, PE32 16->95 dropped 97 C:\...\Runtime Broker.exe:Zone.Identifier, ASCII 16->97 dropped 27 Runtime Broker.exe 16->27         started        29 cmd.exe 16->29         started        31 Runtime Broker.exe 18->31         started        33 cmd.exe 18->33         started        file5 signatures6 process7 dnsIp8 103 api64.ipify.org 64.185.233.11, 443, 49721, 49729 WEBNXUS United States 20->103 105 cdn.discordapp.com 162.159.130.233, 443, 49714, 49734 CLOUDFLARENETUS United States 20->105 113 4 other IPs or domains 20->113 75 C:\Users\user\AppData\...\KernelUpdate1.exe, PE32 20->75 dropped 77 C:\Users\user\AppData\...\Runtime Broker.exe, PE32 20->77 dropped 79 C:\...\Runtime Broker.exe:Zone.Identifier, ASCII 20->79 dropped 137 Antivirus detection for dropped file 20->137 139 Multi AV Scanner detection for dropped file 20->139 141 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 20->141 147 3 other signatures 20->147 35 KernelUpdate1.exe 3 20->35         started        39 VisualStudioUpdaterTmp.exe 20->39         started        41 cmd.exe 1 20->41         started        143 Uses schtasks.exe or at.exe to add and modify task schedules 25->143 43 conhost.exe 25->43         started        45 choice.exe 1 25->45         started        107 162.159.133.233, 443, 49724 CLOUDFLARENETUS United States 27->107 109 145.14.144.38, 443, 49738 AWEXUS Netherlands 27->109 111 riftrebirth.000webhostapp.com 27->111 145 Query firmware table information (likely to detect VMs) 27->145 47 cmd.exe 27->47         started        49 conhost.exe 29->49         started        51 choice.exe 29->51         started        53 conhost.exe 33->53         started        file9 signatures10 process11 dnsIp12 101 66.42.72.69, 1337, 49720 AS-CHOOPAUS United States 35->101 129 Antivirus detection for dropped file 35->129 131 Multi AV Scanner detection for dropped file 35->131 133 Machine Learning detection for dropped file 35->133 55 cmd.exe 35->55         started        135 Tries to harvest and steal browser information (history, passwords, etc) 39->135 57 conhost.exe 39->57         started        59 juscheduler.exe 41->59         started        63 conhost.exe 41->63         started        65 conhost.exe 47->65         started        67 juscheduler.exe 47->67         started        signatures13 process14 file15 69 conhost.exe 55->69         started        71 schtasks.exe 55->71         started        99 C:\Windows\System32behaviorgraphroupPolicy\gpt.ini, ASCII 59->99 dropped 153 Modifies Group Policy settings 59->153 73 juscheduler.exe 59->73         started        signatures16 process17
Detection:
asyncrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/6c3b8f706293d8462261afe66048575af6798cd0ebaec43f77a742609be0f869/
Threat name:
ByteCode-MSIL.Backdoor.AsyncRAT
Create hunting rule
Status:
Malicious
First seen:
2021-05-15 22:23:01 UTC
AV detection:
34 of 47 (72.34%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=nq5y64dcspmemitbv7tgascxll3htdgq5oxmip3xu5bgbg7a7buq._file
Verdict:
malicious
Label(s):
asyncrat
Create hunting rule
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AsyncRAT
+ 985 additional samples on MalwareBazaar
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat evasion persistence rat spyware stealer trojan upx
Link:
https://tria.ge/reports/210517-cnjmclnvre/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Drops file in System32 directory
Adds Run key to start application
Loads dropped DLL
Reads user/profile data of web browsers
Windows security modification
Disables Task Manager via registry modification
Downloads MZ/PE file
Executes dropped EXE
UPX packed file
Async RAT payload
AsyncRat
Modifies security service
Suspicious use of NtCreateUserProcessOtherParentProcess
Malware Config
C2 Extraction:
66.42.72.69:1337
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/6c3b8f706293d8462261afe66048575af6798cd0ebaec43f77a742609be0f869

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:pe_imphash
Create hunting rule
Rule name:Reverse_text_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Reverse text detected
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_asyncrat_j1
Create hunting rule
Author:Johannes Bader @viql
Description:detects AsyncRAT
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.

Cape
Cape
https://www.capesandbox.com/analysis/157761/

Comments


Avatar
a̵c̵c̸i̵d̷e̵n̷t̴a̷l̴r̵e̷b̸e̴l̸ commented on 2021-05-17 03:59:14 UTC

============================================================
MBC behaviors list (github.com/accidentalrebel/mbcscan):
============================================================
0) [B0009] Anti-Behavioral Analysis::Virtual Machine Detection
1) [C0027.001] Cryptography Micro-objective::AES::Encrypt Data
3) [B0023] Execution::Install Additional Program