MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fd5b9cbb176cfea7cb3ba0b8f10e323eb1a9c1a914a0ab9182aa033c8ea18429. 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: 17


Intelligence 17 IOCs YARA 14 File information Comments
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SHA256 hash: fd5b9cbb176cfea7cb3ba0b8f10e323eb1a9c1a914a0ab9182aa033c8ea18429
SHA3-384 hash: 528f4a6efa40ab30a5fec68945e2467eb21fe8e1a1ae6434753b2ad59d553fdc49901ed72a1eafb6499b247c424c87bb
SHA1 hash: 3dc9749dc480d00097873f1fbb263bb25dc83f49
MD5 hash: 7b439e2b88bad323ade65a03b9e2303d
humanhash: oklahoma-bulldog-zebra-muppet
File name:bN39.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:67'584 bytes
First seen:2023-06-14 17:07:58 UTC
Last seen:2023-06-26 22:07:22 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 1536:z2wukvF1ak9gcKu5UYF/cyh+90PfSbuNvQRvo/px8AAZc5HrPlTGFx:z2dkvF1ak9Ku5UYF/LnHSbuNveovrAZ5
TLSH T1086319043BE98019F3BECF74A9F6618446F9F5AF2912D95D1C8910DE0632B829941FFB
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10523/12/4)
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) (4505/5/1)
Reporter pmelson
Tags:AsyncRAT exe

Intelligence

File Origin
# of uploads :
4
# of downloads :
320
Origin country :
US US
Vendor Threat Intelligence
Malware family:
asyncrat
Create hunting rule
ID:
1
File name:
bN39.exe
Verdict:
Malicious activity
Analysis date:
2023-06-14 17:09:10 UTC
Tags:
trojan rat asyncrat
Link:
https://app.any.run/tasks/56016b12-3bcc-4e7a-87a8-bb81200e920b

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/398930/
Detection(s):
Win.Packed.Razy-9625918-0
Create hunting rule

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
DNS request
Creating a window
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Setting a global event handler for the keyboard
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm asyncrat cmd.exe greyware lolbin packed rat reg
Link:
https://www.filescan.io/uploads/6489f3f390acee489f787fe7/reports/77ded1cc-50c9-46e3-b88a-40955cfc345f/overview
Verdict:
Malicious
Labled as:
IL:Trojan.MSILZilla
Link:
https://www.hybrid-analysis.com/sample/fd5b9cbb176cfea7cb3ba0b8f10e323eb1a9c1a914a0ab9182aa033c8ea18429
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/03a0db1a-15be-4f3f-892b-fabee55a2365
Result
Threat name:
AsyncRAT
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1254730
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Found malware configuration
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Modifies the hosts 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)
Uses dynamic DNS services
Yara detected AsyncRAT
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 887750 Sample: bN39.exe Startdate: 14/06/2023 Architecture: WINDOWS Score: 100 22 Snort IDS alert for network traffic 2->22 24 Found malware configuration 2->24 26 Malicious sample detected (through community Yara rule) 2->26 28 9 other signatures 2->28 7 bN39.exe 4 2->7         started        process3 dnsIp4 20 walder08.duckdns.org 181.141.4.153, 49721, 8000 EPMTelecomunicacionesSAESPCO Colombia 7->20 18 C:\Windows\System32\drivers\etc\hosts, ASCII 7->18 dropped 30 Modifies the hosts file 7->30 12 cmd.exe 1 7->12         started        file5 signatures6 process7 process8 14 taskkill.exe 1 12->14         started        16 conhost.exe 12->16         started       
Detection:
asyncrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/fd5b9cbb176cfea7cb3ba0b8f10e323eb1a9c1a914a0ab9182aa033c8ea18429/
Threat name:
ByteCode-MSIL.Backdoor.AsyncRAT
Create hunting rule
Status:
Malicious
First seen:
2023-06-14 17:08:06 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7vnzzoyxnt7kpsz3uc4pcdrsh2y2tqnjcsqkxemcvibtzdvbqquq._file
Verdict:
malicious
Label(s):
asyncrat
Create hunting rule
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat botnet:default rat spyware stealer
Link:
https://tria.ge/reports/230614-vnjfbsbf93/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Reads user/profile data of web browsers
Async RAT payload
AsyncRat
Malware Config
C2 Extraction:
walder08.duckdns.org:8000
Unpacked files
SH256 hash:
fd5b9cbb176cfea7cb3ba0b8f10e323eb1a9c1a914a0ab9182aa033c8ea18429
MD5 hash:
7b439e2b88bad323ade65a03b9e2303d
SHA1 hash:
3dc9749dc480d00097873f1fbb263bb25dc83f49
Detections:
AsyncRAT
Create hunting rule
win_asyncrat_w0
Create hunting rule
Link:
https://www.unpac.me/results/5152c712-c25b-4305-a66c-0afcef9d4e61/
Malware family:
AsyncRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/fd5b9cbb176c/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/fd5b9cbb176cfea7cb3ba0b8f10e323eb1a9c1a914a0ab9182aa033c8ea18429

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_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:msil_suspicious_use_of_strreverse
Create hunting rule
Author:dr4k0nia
Description:Detects mixed use of Microsoft.CSharp and VisualBasic to use StrReverse
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:Windows_Trojan_Asyncrat_11a11ba1
Create hunting rule
Author:Elastic Security
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 fd5b9cbb176cfea7cb3ba0b8f10e323eb1a9c1a914a0ab9182aa033c8ea18429

(this sample)

  
Link
https://www.virustotal.com/gui/file/fd5b9cbb176cfea7cb3ba0b8f10e323eb1a9c1a914a0ab9182aa033c8ea18429/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/398930/

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