MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 28b61c22d9bb96686bb3bb6e758fb1bba123d83720eb1d3588c673ac9040ed86. 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: 15


Intelligence 15 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 28b61c22d9bb96686bb3bb6e758fb1bba123d83720eb1d3588c673ac9040ed86
SHA3-384 hash: 5edf644a1991e2f6cafd003b74d5ec74ef53dfeac035c4a0e4b2d2cc70e3d2dad2edb946eb21e4256d5de7f174dd2879
SHA1 hash: 3b40da85790c6814315a4c94b4eee6db776182cc
MD5 hash: a30d8074ae1e20e4620d80630b265e50
humanhash: eighteen-yellow-missouri-colorado
File name:a30d8074ae1e20e4620d80630b265e50.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:612'678 bytes
First seen:2021-09-14 08:40:52 UTC
Last seen:2021-09-14 10:12:12 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash a79b360c3a87da82cb4458e92a93bd72 (3 x AsyncRAT)
ssdeep 6144:leq/ctmHAtV6vHr9q/C0XIPHn/RflEq1hM0VKiEgwrKOQb9G:leHFXIPHZl1HpEvGbE
Threatray 1'327 similar samples on MalwareBazaar
TLSH T1E4D4812EA5286A4CF35580BCB9718DFF26453C3F40A7B9B3E24CE98B15B53D3646530A
dhash icon f0d4b2d1d8b0d0f0 (20 x BitRAT, 11 x AsyncRAT, 4 x QuasarRAT)
Reporter abuse_ch
Tags:AsyncRAT exe RAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
208
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a30d8074ae1e20e4620d80630b265e50.exe
Verdict:
Malicious activity
Analysis date:
2021-09-14 08:59:10 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/262eb20c-00dc-4540-be8e-d3d35ffaac49

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
BitRAT
Create hunting rule
Link:
https://www.capesandbox.com/analysis/187762/
Detection(s):
SecuriteInfo.com.Trojan.Siggen14.19963.31721.6206.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Launching a process
Sending an HTTP GET request
Using the Windows Management Instrumentation requests
Creating a file in the %temp% directory
Running batch commands
Creating a process with a hidden window
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Connection attempt to an infection source
Sending a TCP request to an infection source
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
evasive overlay packed
Link:
https://www.filescan.io/uploads/61750dc1db358dd15ed92237/reports/cbbf95d6-8793-4fb5-a3db-53b9ce9c3ae6/overview
Malware family:
AsyncRAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/cfd15f61-a887-411c-9e2a-f405a4d285cb
Result
Threat name:
AsyncRAT BitRAT
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/850511
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Bypasses PowerShell execution policy
Connects to many ports of the same IP (likely port scanning)
Contains functionality to hide a thread from the debugger
Creates files in alternative data streams (ADS)
Creates multiple autostart registry keys
Hides threads from debuggers
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sample uses process hollowing technique
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: Suspicious Script Execution From Temp Folder
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected AsyncRAT
Yara detected BitRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 482954 Sample: yX9ebgba3m.exe Startdate: 14/09/2021 Architecture: WINDOWS Score: 100 74 Multi AV Scanner detection for submitted file 2->74 76 Yara detected BitRAT 2->76 78 Yara detected AntiVM3 2->78 80 7 other signatures 2->80 10 yX9ebgba3m.exe 1 2 2->10         started        14 dh.exe 2->14         started        16 dh.exe 2->16         started        18 2 other processes 2->18 process3 file4 62 C:\Users\user\AppData\Roaming\cw\ch.exe, PE32 10->62 dropped 94 Creates multiple autostart registry keys 10->94 96 Writes to foreign memory regions 10->96 98 Allocates memory in foreign processes 10->98 20 RegAsm.exe 1 4 10->20         started        100 Multi AV Scanner detection for dropped file 14->100 102 Machine Learning detection for dropped file 14->102 104 Sample uses process hollowing technique 14->104 25 RegAsm.exe 14->25         started        106 Injects a PE file into a foreign processes 16->106 27 RegAsm.exe 16->27         started        29 RegAsm.exe 16->29         started        31 RegAsm.exe 16->31         started        39 2 other processes 16->39 33 RegAsm.exe 3 18->33         started        35 RegAsm.exe 2 18->35         started        37 RegAsm.exe 18->37         started        signatures5 process6 dnsIp7 64 185.157.160.147, 1973, 1975, 49740 OBE-EUROPEObenetworkEuropeSE Sweden 20->64 60 C:\Users\user\AppData\Local\Temp\urophz.exe, PE32 20->60 dropped 86 Contains functionality to hide a thread from the debugger 20->86 41 cmd.exe 1 20->41         started        88 Hides threads from debuggers 25->88 file8 signatures9 process10 signatures11 90 Suspicious powershell command line found 41->90 92 Bypasses PowerShell execution policy 41->92 44 powershell.exe 14 41->44         started        46 conhost.exe 41->46         started        process12 process13 48 urophz.exe 1 2 44->48         started        file14 56 C:\Users\user\AppData\Roaming\de\dh.exe, PE32 48->56 dropped 66 Multi AV Scanner detection for dropped file 48->66 68 Machine Learning detection for dropped file 48->68 70 Creates multiple autostart registry keys 48->70 72 Sample uses process hollowing technique 48->72 52 RegAsm.exe 1 1 48->52         started        signatures15 process16 file17 58 C:\Users\user\AppData\Local:14-09-2021, ASCII 52->58 dropped 82 Creates files in alternative data streams (ADS) 52->82 84 Hides threads from debuggers 52->84 signatures18
Detection:
asyncrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/28b61c22d9bb96686bb3bb6e758fb1bba123d83720eb1d3588c673ac9040ed86/
Threat name:
Win32.Trojan.Bulz
Create hunting rule
Status:
Malicious
First seen:
2021-09-14 04:20:53 UTC
AV detection:
15 of 43 (34.88%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=fc3byiwzxolgq25txnxhld5rxoqshwbxedvr2nmiyzz2zeca5wda._file
Verdict:
malicious
Label(s):
asyncrat
Create hunting rule
Similar samples:
0a975dd0ed5ad0c5be58ca6ed4c1fc01a3cab3b4322b49c786354ca0335dce1b
AsyncRAT
2134fd37c725045eda3f016dc0da56c82b9d35a03a5ea4cedc15415c66eb0259
AsyncRAT
5cc9dfb0172bf01da6b14d43521673e2250cdae8edee6ce5089ebe2838defda2
AsyncRAT
6476d20efbafc2f125919f44a3e70e27e70812f68963c7c3e31f1ce7afe414d0
AsyncRAT
a20939d2791cfeb8dfd3f2e7b6f18e77b57086b2a06d6d735461ade24f9eeced
AsyncRAT
d23cfd87e8aee8e9db354bb276f0eee64da604014eb93ae74d6af9dc31613330
AsyncRAT
e5fcad2ee0a3f7bd63a8154eed6ae60a382e1eafeca26395cdd3a491c815383e
AsyncRAT
+ 1'317 additional samples on MalwareBazaar
Result
Malware family:
bitrat
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat family:bitrat botnet:6 persistence rat trojan
Link:
https://tria.ge/reports/210914-klez1sadcj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
Async RAT payload
AsyncRat
BitRAT
BitRAT Payload
Malware Config
C2 Extraction:
185.157.160.147:1973
Unpacked files
SH256 hash:
16188f8ed30d0126fbd665834d0cd8784896b66789cc8dd5ffb1cecf2c843b8d
MD5 hash:
8cf2a9660ef827b8ab9fb4b547b9cfb0
SHA1 hash:
4a71d5405411c63ff7c29afe3696437b670060c7
Detections:
win_asyncrat_w0
Create hunting rule
Link:
https://www.unpac.me/results/7c4ef806-1ae8-4358-9971-41c4f443dea9/
SH256 hash:
28b61c22d9bb96686bb3bb6e758fb1bba123d83720eb1d3588c673ac9040ed86
MD5 hash:
a30d8074ae1e20e4620d80630b265e50
SHA1 hash:
3b40da85790c6814315a4c94b4eee6db776182cc
Link:
https://www.unpac.me/results/7c4ef806-1ae8-4358-9971-41c4f443dea9/
Malware family:
AsyncRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/28b61c22d9bb/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/28b61c22d9bb96686bb3bb6e758fb1bba123d83720eb1d3588c673ac9040ed86

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_EXE_ASEP_REG_Reverse
Create hunting rule
Author:ditekSHen
Description:Detects file containing reversed ASEP Autorun registry keys
Rule name:pe_imphash
Create hunting rule
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.

Web download

AsyncRAT

Executable exe 28b61c22d9bb96686bb3bb6e758fb1bba123d83720eb1d3588c673ac9040ed86

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1608769/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/187762/
  
URLhaus
https://urlhaus.abuse.ch/url/1608283/
  
URLhaus
https://urlhaus.abuse.ch/url/1608100/

Comments