MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 efb5f3b0881e717089934912881bcdb63874e66a00ba2250a845827e2ac40ff7. 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: 14


Intelligence 14 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: efb5f3b0881e717089934912881bcdb63874e66a00ba2250a845827e2ac40ff7
SHA3-384 hash: e7ad9ce701aa0632232d921bcd08a1b846e82bee1ff905f090f68f205dfe4c4c6dc6b10717597b0b4b3f1b9045e43821
SHA1 hash: e5ee1113eb5e3eeb112666e6ae31fd730c46c15e
MD5 hash: 781bd32997cb871ab30fb3f303d45cab
humanhash: missouri-oven-arizona-april
File name:KbSetup.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:64'512 bytes
First seen:2022-12-19 01:23:36 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'750 x AgentTesla, 19'656 x Formbook, 12'248 x SnakeKeylogger)
ssdeep 1536:QhW5hc1kw0kVqq1oWN6WHtbbTwlqtMkNGODpqKmY7:QhW5hc1kWVqq1ftbbTAqtMggz
Threatray 4'158 similar samples on MalwareBazaar
TLSH T10F535A002798C965E2AD4AF8BCF2550106B1D5372102DA9E7CC854DBAB9FFC65A123FF
TrID 60.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.8% (.SCR) Windows screen saver (13097/50/3)
8.7% (.EXE) Win64 Executable (generic) (10523/12/4)
5.4% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
Reporter JaffaCakes118
Tags:AsyncRAT exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
185
Origin country :
GB GB
Vendor Threat Intelligence
Malware family:
asyncrat
Create hunting rule
ID:
1
File name:
KbSetup.exe
Verdict:
Malicious activity
Analysis date:
2022-12-19 01:24:46 UTC
Tags:
asyncrat
Link:
https://app.any.run/tasks/5594b459-7d3c-434b-97ef-3e8ac0fd351a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/347773/
Detection(s):
Win.Packed.Razy-9807129-0
Create hunting rule

Win.Malware.Generickdz-9865912-0
Create hunting rule

Win.Malware.Enigmaprotector-9874743-0
Create hunting rule

Win.Malware.Enigmaprotector-9881027-0
Create hunting rule

Win.Trojan.AsyncRAT-9914220-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Creating a file
Launching a process
Creating a process from a recently created file
DNS request
Unauthorized injection to a recently created process
Enabling autorun by creating a file
Gathering data
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.
Malware family:
ModernLoader
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4bd5073f-1918-48db-98d9-a92de751c1e2
Result
Threat name:
AsyncRAT
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1136810
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Drops PE files with benign system names
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: Schedule system process
System process connects to network (likely due to code injection or exploit)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AsyncRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 769540 Sample: KbSetup.exe Startdate: 19/12/2022 Architecture: WINDOWS Score: 100 36 Malicious sample detected (through community Yara rule) 2->36 38 Antivirus / Scanner detection for submitted sample 2->38 40 Multi AV Scanner detection for submitted file 2->40 42 5 other signatures 2->42 7 KbSetup.exe 7 2->7         started        11 svchost.exe 3 2->11         started        process3 file4 30 C:\Users\user\AppData\Roaming\svchost.exe, PE32 7->30 dropped 32 C:\Users\user\AppData\...\KbSetup.exe.log, CSV 7->32 dropped 46 Drops PE files with benign system names 7->46 13 cmd.exe 1 7->13         started        15 cmd.exe 1 7->15         started        48 Antivirus detection for dropped file 11->48 50 System process connects to network (likely due to code injection or exploit) 11->50 52 Multi AV Scanner detection for dropped file 11->52 54 Machine Learning detection for dropped file 11->54 signatures5 process6 signatures7 18 svchost.exe 2 13->18         started        22 conhost.exe 13->22         started        24 timeout.exe 1 13->24         started        56 Uses schtasks.exe or at.exe to add and modify task schedules 15->56 26 conhost.exe 15->26         started        28 schtasks.exe 1 15->28         started        process8 dnsIp9 34 dtbvira.zapto.org 72.239.2.39, 5200 BHN-33363US United States 18->34 44 System process connects to network (likely due to code injection or exploit) 18->44 signatures10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/efb5f3b0881e717089934912881bcdb63874e66a00ba2250a845827e2ac40ff7/
Threat name:
ByteCode-MSIL.Backdoor.AsyncRAT
Create hunting rule
Status:
Malicious
First seen:
2022-12-19 01:24:08 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
25 of 26 (96.15%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=5627hmeidzyxbcmtjejiqg6nwy4hjztkac5ceufiiwbh4kweb73q._file
Verdict:
malicious
Similar samples:
0479683ff6d420fc73b1b229615dce2b94d896ca839747e2c7ca94a258b8ccfd
AsyncRAT
2b2b457dcd95ad2887c6f8d52041c3120ae9a674c34131ec09d18eead38e0992
AsyncRAT
533be061fa24c8041cdf7bd850a18090f02e9d96016a954dd4373860106cad40
AsyncRAT
5a6f5d425060a2bfc152e1c2673991151e8863354deb3c4febd60ce42a80f35e
AsyncRAT
5f031f346380c107df7bcb2af95a4a9cc23e1446bb2b9986db5f88af8749a400
AsyncRAT
9e90db01ca80d818532e8945641e807c541ede136613374bc39da9d1102c1be9
AsyncRAT
b6e4d99871249faefd2ed9dab5dd045d3d9ea13b4608262588eb157ddc312a68
AsyncRAT
c4aad61b17ef29e12e9ad04c985db3bc6b3fa3f79cfb472eb8e1d197bff4f606
AsyncRAT
eb8302fbd0a3eda7620c0af1728a5d151afe1648d07525862c3701fc34c36d63
AsyncRAT
+ 4'148 additional samples on MalwareBazaar
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat botnet:venom clients rat
Link:
https://tria.ge/reports/221219-bsdabsha4x/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Checks computer location settings
Executes dropped EXE
Async RAT payload
AsyncRat
Malware Config
C2 Extraction:
dtbvira.zapto.org:5200
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/960d3bdb-72e8-44c6-aea8-bc1493564a50
Unpacked files
SH256 hash:
efb5f3b0881e717089934912881bcdb63874e66a00ba2250a845827e2ac40ff7
MD5 hash:
781bd32997cb871ab30fb3f303d45cab
SHA1 hash:
e5ee1113eb5e3eeb112666e6ae31fd730c46c15e
Detections:
VenomRat
Create hunting rule
Link:
https://www.unpac.me/results/bed0063d-7224-44e1-bd0a-1498a1129c5d/
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/efb5f3b0881e717089934912881bcdb63874e66a00ba2250a845827e2ac40ff7

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_Detection_Dec_2022
Create hunting rule
Author:Potatech
Description:AsyncRat
Rule name:INDICATOR_SUSPICIOUS_EXE_WMI_EnumerateVideoDevice
Create hunting rule
Author:ditekSHen
Description:Detects executables attemping to enumerate video devices using WMI
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

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

AsyncRAT

Executable exe efb5f3b0881e717089934912881bcdb63874e66a00ba2250a845827e2ac40ff7

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/347773/

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