MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8b99770a23cd1e75ccd0d33d3bd17f33c95f35e101b33f3f11d539571f8ce94a. 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 1 YARA 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8b99770a23cd1e75ccd0d33d3bd17f33c95f35e101b33f3f11d539571f8ce94a
SHA3-384 hash: f2ebcebe811052526a35fe7cec18ad6ee7d02ce93a0f2b5e0df4c925ef585c11875b84bdf5ed4ca3abeb5a90e19ab50d
SHA1 hash: 3082b9072916e112243b2f9754770e16ecadcdcc
MD5 hash: 898d06052e53ef3f27f4357b03cad0c9
humanhash: vegan-glucose-virginia-nevada
File name:898d06052e53ef3f27f4357b03cad0c9.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:453'632 bytes
First seen:2022-06-05 06:55:38 UTC
Last seen:2022-06-05 07:30:27 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:dAk4vAd1uatjVkZ3ATG5WfZQD3VBidm5SagxQbrh0OU:rSU1uy838QD0m5SHQb2O
Threatray 3'735 similar samples on MalwareBazaar
TLSH T152A412C4AB1ADA05E482813C98779562430E6F0DAFBD49E711207B1FBC327CB2676D4E
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon d8d898a1919989b1 (1 x AgentTesla, 1 x AsyncRAT, 1 x QuasarRAT)
Reporter abuse_ch
Tags:AsyncRAT exe RAT


Avatar
abuse_ch
AsyncRAT C2:
198.23.145.147:1137

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
198.23.145.147:1137 https://threatfox.abuse.ch/ioc/656226/

Intelligence

File Origin
# of uploads :
2
# of downloads :
369
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
asyncrat
Create hunting rule
ID:
1
File name:
898d06052e53ef3f27f4357b03cad0c9.exe
Verdict:
Malicious activity
Analysis date:
2022-06-05 06:56:42 UTC
Tags:
trojan rat asyncrat
Link:
https://app.any.run/tasks/2da29fa3-1df8-4be8-87f3-1ac8ea47f3b3

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/276707/
Detection(s):
SecuriteInfo.com.Trojan.Inject4.33309.5590.28796.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Launching cmd.exe command interpreter
Creating a process with a hidden window
Forced system process termination
Running batch commands
Launching a process
Creating a file in the %AppData% subdirectories
Creating a file
Using the Windows Management Instrumentation requests
Forced shutdown of a system process
Sending a TCP request to an infection source
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated packed wacatac
Link:
https://www.filescan.io/uploads/629c539994af7c1190fad4ca/reports/e7910cbc-5f36-4ac3-8c61-47517a2e1941/overview
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/364d6562-c0b1-4c80-b1f9-daa614abd70a
Result
Threat name:
AsyncRAT
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1006811
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Creates an undocumented autostart registry key
Drops executable to a common third party application directory
Found malware configuration
Injects a PE file into a foreign processes
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
Snort IDS alert for network traffic
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected AsyncRAT
Yara detected Costura Assembly Loader
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 639307 Sample: mtrsNu1swW.exe Startdate: 05/06/2022 Architecture: WINDOWS Score: 100 32 Snort IDS alert for network traffic 2->32 34 Found malware configuration 2->34 36 Malicious sample detected (through community Yara rule) 2->36 38 11 other signatures 2->38 7 mtrsNu1swW.exe 5 2->7         started        process3 file4 24 C:\Users\user\AppData\Roaming\...\cloud.exe, PE32 7->24 dropped 26 C:\Users\user\...\cloud.exe:Zone.Identifier, ASCII 7->26 dropped 28 C:\Users\user\AppData\...\mtrsNu1swW.exe.log, ASCII 7->28 dropped 40 Creates an undocumented autostart registry key 7->40 42 Writes to foreign memory regions 7->42 44 Drops executable to a common third party application directory 7->44 46 Injects a PE file into a foreign processes 7->46 11 MSBuild.exe 2 7->11         started        14 cmd.exe 1 7->14         started        16 cmd.exe 1 7->16         started        signatures5 process6 dnsIp7 30 198.23.145.147, 1070, 49696 AS-COLOCROSSINGUS United States 11->30 18 conhost.exe 14->18         started        20 timeout.exe 1 14->20         started        22 conhost.exe 16->22         started        process8
Detection:
asyncrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/8b99770a23cd1e75ccd0d33d3bd17f33c95f35e101b33f3f11d539571f8ce94a/
Threat name:
ByteCode-MSIL.Trojan.Skeeyah
Create hunting rule
Status:
Malicious
First seen:
2022-06-03 13:11:54 UTC
File Type:
PE (.Net Exe)
Extracted files:
23
AV detection:
22 of 26 (84.62%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=romxocrdzuphltgq2m6txul7gpev6npbagzt6pyr2u4voh4m5ffa._file
Verdict:
malicious
Label(s):
asyncrat
Create hunting rule
Similar samples:
1299373ec40fc1f3f16957338574a9ad51a94e62220cc8c08f1ad81dee443544
AsyncRAT
16fc0cec13d88da3d0a36e4c42e733db8f1e21cafc18fd813a25cd0bc835f35a
AsyncRAT
438e8f8d626ca18bb5fbd3499cad058033b199c865badba6415e362d5b8dcd49
AsyncRAT
4964c618368217328e5fb70c84e047f18e5027ae0e6ea984b1b96c38ffad77c7
AsyncRAT
58cac4ef6c2a2c25e3a50ea093f3bc90933f046f76c14235b70cf6caf1bfd9ca
AsyncRAT
6527e25f86c1902c430fc0e52769359f831365969c35fc12ef837b7b63fcc939
AsyncRAT
cf495989e776f59e020fad15bb34b5f92573f9a1b96a51cdd5a02d31d339d502
AsyncRAT
f85fb30beeceb9e2721aa12deee155bb604c0a364f926da18644af7e6e5c7a25
AsyncRAT
f8d60cc318fc750f965180766b7edb64a81d86845b27b23f8d7bb0296adea2b7
AsyncRAT
+ 3'725 additional samples on MalwareBazaar
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat botnet:default rat suricata
Link:
https://tria.ge/reports/220605-hqcdksggh7/
Behaviour
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Async RAT payload
AsyncRat
suricata: ET MALWARE Generic AsyncRAT Style SSL Cert
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
Malware Config
C2 Extraction:
198.23.145.147:1070
198.23.145.147:1137
198.23.145.147:2525
Unpacked files
SH256 hash:
9f01d9f2ed07e630ec078efa5d760762c3c8ad3b06e9e8a9062a37d63d57b026
MD5 hash:
9fbb8cec55b2115c00c0ba386c37ce62
SHA1 hash:
e2378a1c22c35e40fd1c3e19066de4e33b50f24a
Link:
https://www.unpac.me/results/25b07e62-038b-446a-b6a5-cf7b55b95571/
SH256 hash:
e3473b354c4ba0307d236bff471c71144e33ceb4a35ade57aa2eba8dd0a652d5
MD5 hash:
aacc363454b41bb3268b1ce9f3235e43
SHA1 hash:
798eb3bd42b43ae030fe0854b5aa5be75739ec9d
Link:
https://www.unpac.me/results/25b07e62-038b-446a-b6a5-cf7b55b95571/
SH256 hash:
ed92a241b2dd3b6aef6e195312de13a764bf701d82dd63eb0e0db6dd404113cb
MD5 hash:
09489cd58b9ad313971a34e819ebceb2
SHA1 hash:
20dbdc7c031a19137594c14cb451532d41d2de29
Detections:
win_asyncrat_w0
Create hunting rule
Link:
https://www.unpac.me/results/25b07e62-038b-446a-b6a5-cf7b55b95571/
SH256 hash:
f3a96832c41d146f8b63af85ec0d09bd9ac6c42de6d2ee119671823bb5139a67
MD5 hash:
fe57b77d202489c6d0acc9bb10b295b5
SHA1 hash:
188859a45b5b29c3447ba6f0daab1d4509c60a24
Link:
https://www.unpac.me/results/25b07e62-038b-446a-b6a5-cf7b55b95571/
SH256 hash:
8b99770a23cd1e75ccd0d33d3bd17f33c95f35e101b33f3f11d539571f8ce94a
MD5 hash:
898d06052e53ef3f27f4357b03cad0c9
SHA1 hash:
3082b9072916e112243b2f9754770e16ecadcdcc
Link:
https://www.unpac.me/results/25b07e62-038b-446a-b6a5-cf7b55b95571/
Malware family:
AsyncRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/8b99770a23cd/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/8b99770a23cd1e75ccd0d33d3bd17f33c95f35e101b33f3f11d539571f8ce94a

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:INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Author:ditekSHen
Description:Detects executables packed with SmartAssembly
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: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: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: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.

Web download

AsyncRAT

Executable exe 8b99770a23cd1e75ccd0d33d3bd17f33c95f35e101b33f3f11d539571f8ce94a

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2202443/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/276707/
  
URLhaus
https://urlhaus.abuse.ch/url/2226748/

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