MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 86f98dc5a9a8de8404238ebe7c6a1e86f88cf39c1129e2bafd021a1199162f56. 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: 21


Intelligence 21 IOCs YARA 28 File information Comments 1

SHA256 hash: 86f98dc5a9a8de8404238ebe7c6a1e86f88cf39c1129e2bafd021a1199162f56
SHA3-384 hash: 2728bcf5c6eb16031da3df247e7308b1361cd9ad713339a4fde7f7595adeb1e7d81e7435b8b4124e4d653aed03583c09
SHA1 hash: 5a3e3b4c30529380acd3c0b55b84222efee6fc34
MD5 hash: 2ad39f4cc1d37972dc62f3531ccc9343
humanhash: juliet-network-lithium-alanine
File name:Client-built.exe
Download: download sample
Signature QuasarRAT
File size:3'265'536 bytes
First seen:2025-10-09 11:07:22 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'861 x AgentTesla, 19'793 x Formbook, 12'305 x SnakeKeylogger)
ssdeep 49152:CvWI22SsaNYfdPBldt698dBcjHF4mSmzeLoGd0mTHHB72eh2NT:Cv722SsaNYfdPBldt6+dBcjHF4mok
Threatray 1'426 similar samples on MalwareBazaar
TLSH T1BFE55A1477F85E62E16BD3B2D5F0542363F0F82AF3A3EB0B5191677A1C93B4098426A7
TrID 58.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
13.2% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
8.4% (.EXE) Win64 Executable (generic) (10522/11/4)
5.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.0% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika pebin
Reporter burger
Tags:exe QuasarRAT

Intelligence


File Origin
# of uploads :
1
# of downloads :
97
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Client-built.exe
Verdict:
Malicious activity
Analysis date:
2025-10-09 11:07:13 UTC
Tags:
n/a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.9%
Tags:
infosteal autorun quasar
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% 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-vm expand explorer infostealer lolbin obfuscated obfuscated obfuscated remote runonce stealer stealer threat
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-10-09T08:11:00Z UTC
Last seen:
2025-10-11T01:04:00Z UTC
Hits:
~10
Detections:
Trojan-PSW.Win32.Stealer.sb Trojan-PSW.MSIL.Agent.sb Trojan.Win32.Quasar.sb Trojan.MSIL.Quasar.a HEUR:Trojan-Spy.MSIL.Agent.sb HEUR:Trojan.MSIL.Quasar.gen PDM:Trojan.Win32.Generic VHO:Trojan-PSW.MSIL.Convagent.gen PDM:Trojan.Win32.Tasker.cust
Result
Threat name:
AsyncRAT, Quasar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Found malware configuration
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
Sample uses string decryption to hide its real strings
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AsyncRAT
Yara detected Quasar RAT
Behaviour
Behavior Graph:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1792056 Sample: Client-built.exe Startdate: 09/10/2025 Architecture: WINDOWS Score: 100 161 Found malware configuration 2->161 163 Malicious sample detected (through community Yara rule) 2->163 165 Antivirus detection for dropped file 2->165 167 6 other signatures 2->167 14 Client-built.exe 5 2->14         started        18 Client.exe 4 2->18         started        process3 file4 155 C:\Users\user\AppData\Roaming\...\Client.exe, PE32 14->155 dropped 157 C:\Users\user\...\Client-built.exe.log, CSV 14->157 dropped 205 Uses schtasks.exe or at.exe to add and modify task schedules 14->205 207 Hides that the sample has been downloaded from the Internet (zone.identifier) 14->207 20 Client.exe 5 14->20         started        24 schtasks.exe 1 14->24         started        159 C:\Users\user\AppData\...\zfB3p91IdKg2.bat, DOS 18->159 dropped 26 cmd.exe 1 18->26         started        28 schtasks.exe 1 18->28         started        signatures5 process6 file7 143 C:\Users\user\AppData\...\uTwNOqJMrURr.bat, DOS 20->143 dropped 183 Antivirus detection for dropped file 20->183 185 Multi AV Scanner detection for dropped file 20->185 187 Hides that the sample has been downloaded from the Internet (zone.identifier) 20->187 189 Installs a global keyboard hook 20->189 30 cmd.exe 1 20->30         started        33 schtasks.exe 1 20->33         started        35 SIHClient.exe 6 20->35         started        37 conhost.exe 24->37         started        191 Uses ping.exe to sleep 26->191 39 Client.exe 26->39         started        42 conhost.exe 26->42         started        44 PING.EXE 1 26->44         started        46 chcp.com 1 26->46         started        48 conhost.exe 28->48         started        signatures8 process9 file10 199 Uses ping.exe to sleep 30->199 201 Uses ping.exe to check the status of other devices and networks 30->201 50 Client.exe 30->50         started        54 conhost.exe 30->54         started        56 PING.EXE 1 30->56         started        58 chcp.com 1 30->58         started        60 conhost.exe 33->60         started        149 C:\Users\user\AppData\...\rsYGiAf551tE.bat, DOS 39->149 dropped 203 Hides that the sample has been downloaded from the Internet (zone.identifier) 39->203 62 cmd.exe 39->62         started        64 schtasks.exe 39->64         started        signatures11 process12 file13 141 C:\Users\user\AppData\...\xS0lB2gA7jgA.bat, DOS 50->141 dropped 175 Hides that the sample has been downloaded from the Internet (zone.identifier) 50->175 66 cmd.exe 50->66         started        69 schtasks.exe 50->69         started        71 conhost.exe 50->71         started        177 Uses ping.exe to sleep 62->177 73 Client.exe 62->73         started        76 conhost.exe 62->76         started        78 chcp.com 62->78         started        80 PING.EXE 62->80         started        82 conhost.exe 64->82         started        signatures14 process15 file16 169 Uses ping.exe to sleep 66->169 84 Client.exe 66->84         started        88 conhost.exe 66->88         started        90 chcp.com 66->90         started        92 PING.EXE 66->92         started        94 conhost.exe 69->94         started        151 C:\Users\user\AppData\...\4YBcZhJaQ3pJ.bat, DOS 73->151 dropped 171 Hides that the sample has been downloaded from the Internet (zone.identifier) 73->171 96 cmd.exe 73->96         started        98 schtasks.exe 73->98         started        signatures17 process18 file19 145 C:\Users\user\AppData\...\l8DJOn195SJs.bat, DOS 84->145 dropped 193 Hides that the sample has been downloaded from the Internet (zone.identifier) 84->193 100 cmd.exe 84->100         started        103 schtasks.exe 84->103         started        195 Uses ping.exe to sleep 96->195 105 Client.exe 96->105         started        108 conhost.exe 96->108         started        110 chcp.com 96->110         started        112 PING.EXE 96->112         started        114 conhost.exe 98->114         started        signatures20 process21 file22 179 Uses ping.exe to sleep 100->179 116 Client.exe 100->116         started        120 conhost.exe 100->120         started        122 chcp.com 100->122         started        124 PING.EXE 100->124         started        153 C:\Users\user\AppData\...\IlHr11oWqO7o.bat, DOS 105->153 dropped 181 Hides that the sample has been downloaded from the Internet (zone.identifier) 105->181 126 schtasks.exe 105->126         started        128 cmd.exe 105->128         started        signatures23 process24 file25 147 C:\Users\user\AppData\...\sfVnbiBNjFu4.bat, DOS 116->147 dropped 197 Hides that the sample has been downloaded from the Internet (zone.identifier) 116->197 130 cmd.exe 116->130         started        133 schtasks.exe 116->133         started        135 conhost.exe 126->135         started        137 conhost.exe 128->137         started        signatures26 process27 signatures28 173 Uses ping.exe to sleep 130->173 139 conhost.exe 133->139         started        process29
Verdict:
inconclusive
YARA:
9 match(es)
Tags:
.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.31 Win 32 Exe x86
Threat name:
ByteCode-MSIL.Backdoor.Quasar
Status:
Malicious
First seen:
2025-10-09 11:07:15 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
23 of 24 (95.83%)
Threat level:
  5/5
Result
Malware family:
Score:
  10/10
Tags:
family:quasar botnet:office04 discovery execution persistence spyware trojan
Behaviour
Runs ping.exe
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Enumerates physical storage devices
System Network Configuration Discovery: Internet Connection Discovery
Checks computer location settings
Executes dropped EXE
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
24.167.47.6 :4782
Verdict:
Malicious
Tags:
rat quasar_rat stealer Win.Malware.Generic-9883083-0
YARA:
MAL_QuasarRAT_May19_1 malware_windows_quasarrat win_quasar_rat_client MALWARE_Win_Quasarstealer
Unpacked files
SH256 hash:
86f98dc5a9a8de8404238ebe7c6a1e86f88cf39c1129e2bafd021a1199162f56
MD5 hash:
2ad39f4cc1d37972dc62f3531ccc9343
SHA1 hash:
5a3e3b4c30529380acd3c0b55b84222efee6fc34
Detections:
QuasarRAT
Malware family:
QuasarRAT
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.

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:BLOWFISH_Constants
Author:phoul (@phoul)
Description:Look for Blowfish constants
Rule name:CP_Script_Inject_Detector
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DetectEncryptedVariants
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:Detect_PowerShell_Obfuscation
Author:daniyyell
Description:Detects obfuscated PowerShell commands commonly used in malicious scripts.
Rule name:FreddyBearDropper
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:INDICATOR_SUSPICIOUS_Binary_References_Browsers
Author:ditekSHen
Description:Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
Rule name:INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Author:ditekSHen
Description:Detects Windows executables referencing non-Windows User-Agents
Rule name:INDICATOR_SUSPICIOUS_GENInfoStealer
Author:ditekSHen
Description:Detects executables containing common artifacts observed in infostealers
Rule name:Lumma_Stealer_Detection
Author:ashizZz
Description:Detects a specific Lumma Stealer malware sample using unique strings and behaviors
Reference:https://seanthegeek.net/posts/compromized-store-spread-lumma-stealer-using-fake-captcha/
Rule name:MALWARE_Win_QuasarStealer
Author:ditekshen
Description:Detects Quasar infostealer
Rule name:MAL_QuasarRAT_May19_1
Description:Detects QuasarRAT malware
Rule name:MAL_QuasarRAT_May19_1
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_RID2E1E
Author:Florian Roth
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:MD5_Constants
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:Multifamily_RAT_Detection
Author:Lucas Acha (http://www.lukeacha.com)
Description:Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables
Rule name:NET
Author:malware-lu
Rule name:pe_imphash
Rule name:quasarrat
Author:jeFF0Falltrades
Rule name:quasarrat_kingrat
Author:jeFF0Falltrades
Rule name:RANSOMWARE
Author:ToroGuitar
Rule name:RC6_Constants
Author:chort (@chort0)
Description:Look for RC6 magic constants in binary
Reference:https://twitter.com/mikko/status/417620511397400576
Rule name:RIPEMD160_Constants
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:SHA512_Constants
Author:phoul (@phoul)
Description:Look for SHA384/SHA512 constants
Rule name:Skystars_Malware_Imphash
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_CMD_Powershell_Usage
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:Windows_Generic_Threat_803feff4
Author:Elastic Security
Rule name:win_quasar_rat_client
Author:Matthew @ Embee_Research
Description:Detects strings present in Quasar Rat Samples.

File information


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

Comments



Avatar
commented on 2025-10-09 11:11:08 UTC

RAT King Parser (https://github.com/jeFF0Falltrades/rat_king_parser) Output:

{
"sha256": "86f98dc5a9a8de8404238ebe7c6a1e86f88cf39c1129e2bafd021a1199162f56",
"yara_possible_family": "quasarrat",
"key": "53378f6ed98ea59ec6b2a6b0987211a6a471fd092fd68beff29ed51523592316",
"salt": "bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941",
"config": {
"obfuscated_key_1": "1.4.1",
"obfuscated_key_2": "24.167.47.6 :4782;",
"obfuscated_key_3": 3000,
"obfuscated_key_4": "APPLICATIONDATA",
"obfuscated_key_5": "SubDir",
"obfuscated_key_6": "Client.exe",
"obfuscated_key_7": true,
"obfuscated_key_8": true,
"obfuscated_key_9": "bfc874cf-817c-4165-b98d-72a1452e34cf",
"obfuscated_key_10": "Discord Backround Services",
"obfuscated_key_11": false,
"obfuscated_key_12": true,
"obfuscated_key_13": "914B1E405DA12F3D794433766338559675F4247A",
"obfuscated_key_14": "Office04",
"obfuscated_key_15": "Logs",
"obfuscated_key_16": "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",
"obfuscated_key_17": "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",
"obfuscated_key_18": true,
"obfuscated_key_19": false,
"obfuscated_key_20": "",
"obfuscated_key_21": "",
"obfuscated_key_22": true
}
}