MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 73847acc61c5cf81e1ade006175ee43d851e6fed8c4697dd5713a7e16e39e20e. 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


QuasarRAT


Vendor detections: 19


Intelligence 19 IOCs YARA 24 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 73847acc61c5cf81e1ade006175ee43d851e6fed8c4697dd5713a7e16e39e20e
SHA3-384 hash: cde069b3fc21588d7e570a06ae473ccd8f2db7121258d961c8607dd3a660cb9d18924f6ee97f269cda9bb7807275f306
SHA1 hash: 9602f10242769a07ee023eb2763f5edc8c63b55e
MD5 hash: b8b80acbf99bb8858a5398887f62e54c
humanhash: papa-edward-network-river
File name:Client-built.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:1'882'112 bytes
First seen:2025-10-14 17:03:11 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 24576:pUt4DfHyclOYM5NKij8QzO4lcHNF0tXZWLuyWfnSUvnHTcX:pUtuSGOGqnXpyWbv
Threatray 229 similar samples on MalwareBazaar
TLSH T155950150B3E88107F0FF2FB9E8B616454B76B552D93AD71F098860AC1EA7780DE513A3
TrID 62.2% (.RLL) Microsoft Resource Library (x86) (177572/6/26)
25.6% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
3.6% (.EXE) Win64 Executable (generic) (10522/11/4)
2.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
1.7% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika pebin
Reporter burger
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
98
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Client-built.exe
Verdict:
Malicious activity
Analysis date:
2025-10-14 17:02:19 UTC
Tags:
uac
Link:
https://app.any.run/tasks/1e8ee058-fa4a-4114-b7b1-e07e837cc08b

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/32773/
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68ee824797a16d00a8d9ed9f
Tags:
vmdetect autorun quasar
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the system32 subdirectories
Launching a process
Sending a custom TCP request
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug anti-vm anti-vm base64 cmd cscript explorer fingerprint hacktool lolbin mshta obfuscated packed privilege reconnaissance runonce schtasks update
Link:
https://www.filescan.io/uploads/68ee8285275d977204b67fd9/reports/59965d51-7f20-496d-8157-1a2898dce565/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/73847acc61c5cf81e1ade006175ee43d851e6fed8c4697dd5713a7e16e39e20e
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-10-12T17:48:00Z UTC
Last seen:
2025-10-12T18:21:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/73847acc61c5cf81e1ade006175ee43d851e6fed8c4697dd5713a7e16e39e20e/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/380b1792-7ed9-4cbe-b065-c63eb7ca633f
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1795088
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains functionality to disable the Task Manager (.Net Source)
Drops executables to the windows directory (C:\Windows) and starts them
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Powershell connects to network
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: Potentially Suspicious PowerShell Child Processes
Sigma detected: Schedule system process
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1795088 Sample: Client-built.exe Startdate: 14/10/2025 Architecture: WINDOWS Score: 100 31 civil-perception.gl.at.ply.gg 2->31 43 Malicious sample detected (through community Yara rule) 2->43 45 Antivirus / Scanner detection for submitted sample 2->45 47 Multi AV Scanner detection for submitted file 2->47 49 8 other signatures 2->49 9 Client-built.exe 5 2->9         started        13 powershell.exe 2 2->13         started        signatures3 process4 file5 27 C:\Windows\System32\SubDir\powershell.exe, PE32 9->27 dropped 29 C:\Users\user\...\Client-built.exe.log, CSV 9->29 dropped 51 Drops executables to the windows directory (C:\Windows) and starts them 9->51 53 Uses schtasks.exe or at.exe to add and modify task schedules 9->53 55 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->55 15 powershell.exe 2 9->15         started        19 schtasks.exe 1 9->19         started        signatures6 process7 dnsIp8 33 civil-perception.gl.at.ply.gg 147.185.221.229, 11257 SALSGIVERUS United States 15->33 35 Antivirus detection for dropped file 15->35 37 Multi AV Scanner detection for dropped file 15->37 39 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->39 41 2 other signatures 15->41 21 schtasks.exe 1 15->21         started        23 conhost.exe 19->23         started        signatures9 process10 process11 25 conhost.exe 21->25         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/73847acc61c5cf81e1ade006175ee43d851e6fed8c4697dd5713a7e16e39e20e
Verdict:
QuasarRat
YARA:
15 match(es)
Tags:
.Net Executable Fody/Costura Packer Html Malicious Managed .NET PDB Path PE (Portable Executable) PE File Layout QuasarRat RAT SOS: 0.14 SOS: 0.15 SOS: 0.16 SOS: 0.18 SOS: 0.20 SOS: 0.22 SOS: 0.23 SOS: 0.24 SOS: 0.25 SOS: 0.26 SOS: 0.27 SOS: 0.29 SOS: 0.32 SOS: 0.34 SOS: 0.35 SOS: 0.64 Win 32 Exe x86
Link:
https://app.malva.re/file/b8b80acbf99bb8858a5398887f62e54c
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/73847acc61c5cf81e1ade006175ee43d851e6fed8c4697dd5713a7e16e39e20e/
Verdict:
Malicious
Threat:
Family.QUASAR
Link:
https://tip.neiki.dev/file/73847acc61c5cf81e1ade006175ee43d851e6fed8c4697dd5713a7e16e39e20e
Threat name:
ByteCode-MSIL.Hacktool.Aikaantivm
Create hunting rule
Status:
Malicious
First seen:
2025-10-14 17:03:06 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
23 of 24 (95.83%)
Threat level:
  1/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=oochvtdbyxhydynn4adboxxehwcr437nrrdjpxkxcot6c3rz4iha._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
43ceae1fc8f4e94ef2b73ad8555a5182588cf924ea042baebab1a3805e1cdaed
QuasarRAT
52456d908d99b33a3dfc07c2e17a4e2dff6e9488bb0f36fe2e240a3d24ba00b2
QuasarRAT
5df7a18c5674abbab89a53d3398c3398b800b14f8ff08488d89407402325f75a
QuasarRAT
6dbb22d7e0e30cbba3a888b9e736c9953c7edd4bb04a8855ff998f188e77e661
QuasarRAT
73847acc61c5cf81e1ade006175ee43d851e6fed8c4697dd5713a7e16e39e20e
QuasarRAT
8768859060387f56a2243b3d68d1b88fc12def261668c945d67ba7772f569b24
QuasarRAT
ea90d10a0f856d00da2e68829e7c87e04f0d4834a05405cdbda1455c05f7de0f
QuasarRAT
error
QuasarRAT
+ 219 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar execution persistence spyware trojan
Link:
https://tria.ge/reports/251014-vk16zahx9a/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Drops file in System32 directory
Executes dropped EXE
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
�
Verdict:
Malicious
Tags:
red_team_tool rat quasar_rat backdoor backnet Win.Malware.Generic-9883083-0
YARA:
HKTL_EXE_AlKhaser_Jul_01 MAL_QuasarRAT_May19_1 malware_windows_quasarrat MAL_BackNet_Nov18_1
Link:
https://app.threat.zone/submission/568288b4-7733-4f91-aba1-594929c6c0c4
Unpacked files
SH256 hash:
73847acc61c5cf81e1ade006175ee43d851e6fed8c4697dd5713a7e16e39e20e
MD5 hash:
b8b80acbf99bb8858a5398887f62e54c
SHA1 hash:
9602f10242769a07ee023eb2763f5edc8c63b55e
Detections:
QuasarRAT
Create hunting rule
Link:
https://www.unpac.me/results/1763a7d9-3ca1-4b87-a185-400efb2582dd/
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/73847acc61c5/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Quasar
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/73847acc61c5cf81e1ade006175ee43d851e6fed8c4697dd5713a7e16e39e20e

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:Check_Dlls
Create hunting rule
Rule name:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:Detect_PowerShell_Obfuscation
Create hunting rule
Author:daniyyell
Description:Detects obfuscated PowerShell commands commonly used in malicious scripts.
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:INDICATOR_EXE_Packed_Fody
Create hunting rule
Author:ditekSHen
Description:Detects executables manipulated with Fody
Rule name:Indicator_MiniDumpWriteDump
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects PE files and PowerShell scripts that use MiniDumpWriteDump either through direct imports or string references
Rule name:INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
Author:ditekSHen
Description:Detects Windows executables referencing non-Windows User-Agents
Rule name:INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
Create hunting rule
Author:ditekSHen
Description:Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion
Rule name:MAL_BackNet_Nov18_1
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects BackNet samples
Reference:https://github.com/valsov/BackNet
Rule name:MAL_BackNet_Nov18_1_RID2D6D
Create hunting rule
Author:Florian Roth
Description:Detects BackNet samples
Reference:https://github.com/valsov/BackNet
Rule name:MAL_QuasarRAT_May19_1
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:MAL_QuasarRAT_May19_1
Create hunting rule
Description:Detects QuasarRAT malware
Rule name:MAL_QuasarRAT_May19_1_RID2E1E
Create hunting rule
Author:Florian Roth
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:Multifamily_RAT_Detection
Create hunting rule
Author:Lucas Acha (http://www.lukeacha.com)
Description:Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

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/32773/

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