MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2fe91ae0e4839ae3fb202495f0ab07bdd08c0f06209de131a1660d9a0c834836. 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: 11


Intelligence 11 IOCs YARA 24 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2fe91ae0e4839ae3fb202495f0ab07bdd08c0f06209de131a1660d9a0c834836
SHA3-384 hash: a36c456601d7008b7d321e824dc7f441b26879ca4f0b86d969825b93382384b50983799bd53dd376142ccdf89d39eb96
SHA1 hash: 824f0f62e1f42a45c5112b404604d3d42b457b12
MD5 hash: 16a123f5f1e6627600586bb3d271288a
humanhash: carpet-minnesota-east-october
File name:KLvpn_Installer.msi
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:29'708'288 bytes
First seen:2026-04-02 11:03:39 UTC
Last seen:Never
File type:Microsoft Software Installer (MSI) msi
MIME type:application/x-msi
ssdeep 786432:+Tkq1yVZyJSXhi69IORVwVNxEREnUlio3K:T9VSSxie9RVc4qnUh
TLSH T14E57335BD45DEF65D80A5036D14CA6CE21212FEA0D84883AF89E7EF1B2B457390F1E87
TrID 88.4% (.MST) Windows SDK Setup Transform script (61000/1/5)
11.5% (.) Generic OLE2 / Multistream Compound (8000/1)
Magika msi
Reporter aachum
Tags:apt APT41 CHN CobaltStrike msi Plusdrop QuasarRAT


Avatar
iamaachum
https://kualinvpn.com/download => https://soft2down.oss-ap-southeast-1.aliyuncs.com/KLvpn_Installer.zip

IOCs:
btc23556gvbvc.icu (156.245.234.13:80)
119.29.29.29:53

Intelligence

File Origin
# of uploads :
1
# of downloads :
137
Origin country :
US US
Vendor Threat Intelligence
Gathering data
Detection:
HijackLoader
Create hunting rule
Link:
https://www.capesandbox.com/analysis/60204/
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug anti-vm CAB cmd crypto evasive findstr fingerprint installer installer lolbin opendir packed
Link:
https://www.filescan.io/uploads/69ce4d3190759d6205c0d3d2/reports/ae0072d2-c33d-45d8-854f-0fb1823413d2/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/2fe91ae0e4839ae3fb202495f0ab07bdd08c0f06209de131a1660d9a0c834836
Verdict:
Malicious
File Type:
msi
First seen:
2026-04-03T10:17:00Z UTC
Last seen:
2026-04-03T10:22:00Z UTC
Hits:
~10
Detections:
Trojan.PowerShell.Cobalt.sb Trojan-Spy.MSIL.Downeks.sb HEUR:Trojan.Win32.Generic Trojan.Win64.Shlem.sb Trojan.Win32.Shelm.a UDS:DangerousObject.Multi.Generic Trojan.MSIL.Quasar.sb Trojan.MSIL.Quasar.a Trojan-PSW.Win32.Stealer.sb Trojan-PSW.MSIL.Virinom.sb HEUR:Trojan.Win64.Shelma.a Trojan.Win64.Shelm.sb Trojan.Win32.Shellcode.sb Trojan.Win32.Quasar.sb HEUR:Trojan.VBS.Agent.gen HEUR:Trojan-Dropper.OLE2.Agent.gen
Link:
https://opentip.kaspersky.com/2fe91ae0e4839ae3fb202495f0ab07bdd08c0f06209de131a1660d9a0c834836/results?tab=lookup
Result
Threat name:
DonutLoader, Quasar, XRat
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
81 / 100
Link:
https://www.joesandbox.com/analysis/1892696
Signature
Antivirus detection for URL or domain
Contains functionality to inject code into remote processes
Drops executables to the windows directory (C:\Windows) and starts them
Found direct / indirect Syscall (likely to bypass EDR)
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Sample is not signed and drops a device driver
Unusual module load detection (module proxying)
Yara detected DonutLoader
Yara detected Quasar RAT
Yara detected XRat
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1892696 Sample: KLvpn_Installer.msi Startdate: 02/04/2026 Architecture: WINDOWS Score: 81 97 stzb.163.com 2->97 99 s-cache.nie.163.com 2->99 101 2 other IPs or domains 2->101 109 Malicious sample detected (through community Yara rule) 2->109 111 Antivirus detection for URL or domain 2->111 113 Multi AV Scanner detection for dropped file 2->113 115 4 other signatures 2->115 10 msiexec.exe 12 22 2->10         started        13 XyRFgISTZJpo.exe 1 2->13         started        15 XyRFgISTZJpo.exe 1 2->15         started        17 msiexec.exe 5 2->17         started        signatures3 process4 file5 79 C:\Program Files (x86)\...\letsvpntest.exe, PE32 10->79 dropped 81 C:\Program Files (x86)\...\eQHGtSOiEFABMWZ, DOS 10->81 dropped 83 C:\...\VyTQzasnKkqWBlm.exe, PE32 10->83 dropped 19 msiexec.exe 1 16 10->19         started        23 conhost.exe 13->23         started        25 conhost.exe 15->25         started        process6 file7 69 C:\Windows\zdZAMDaboBqOLrJTCaYvcLQlaTgSNm, PE32+ 19->69 dropped 71 C:\Windows\eQHGtSOiEFABMWZ, DOS 19->71 dropped 73 C:\Windows\XyRFgISTZJpo.exe, PE32+ 19->73 dropped 75 6 other malicious files 19->75 dropped 117 Sample is not signed and drops a device driver 19->117 27 XyRFgISTZJpo.exe 3 19->27         started        31 VyTQzasnKkqWBlm.exe 33 19->31         started        34 letsvpntest.exe 15 19->34         started        36 2 other processes 19->36 signatures8 process9 dnsIp10 107 s-cache.nie.163.com 42.186.160.148, 49724, 49726, 49728 NETEASE-ASGuangzhouNetEaseComputerSystemCoLtdCN China 27->107 123 Multi AV Scanner detection for dropped file 27->123 125 Drops executables to the windows directory (C:\Windows) and starts them 27->125 127 Contains functionality to inject code into remote processes 27->127 129 Unusual module load detection (module proxying) 27->129 38 XyRFgISTZJpo.exe 15 35 27->38         started        43 XyRFgISTZJpo.exe 27->43         started        45 XyRFgISTZJpo.exe 27->45         started        53 2 other processes 27->53 85 C:\...\zdZAMDaboBqOLrJTCaYvcLQlaTgSNm, PE32+ 31->85 dropped 87 C:\...\SodaMusicLauncher.exe, PE32 31->87 dropped 89 C:\Program Files (x86)\...\2_XyRFgISTZJpo.exe, PE32+ 31->89 dropped 91 C:\Program Files (x86)\...\XTXYeIWa.sys, data 31->91 dropped 131 Sample is not signed and drops a device driver 31->131 47 conhost.exe 31->47         started        93 C:\Users\user\AppData\Local\...\nsDialogs.dll, PE32 34->93 dropped 95 C:\Users\user\AppData\Local\...\System.dll, PE32 34->95 dropped 49 conhost.exe 36->49         started        51 conhost.exe 36->51         started        file11 signatures12 process13 dnsIp14 103 btc23556gvbvc.icu 156.245.234.13, 80 DXTL-HKDXTLTseungKwanOServiceHK Seychelles 38->103 105 ipwho.is 104.20.44.133, 49731, 49749, 49754 CLOUDFLARENETUS United States 38->105 77 C:\ProgramData\...\TMark.sys, ASCII 38->77 dropped 119 Sample is not signed and drops a device driver 38->119 121 Found direct / indirect Syscall (likely to bypass EDR) 38->121 55 WerFault.exe 16 38->55         started        57 conhost.exe 38->57         started        59 conhost.exe 43->59         started        61 WerFault.exe 43->61         started        63 conhost.exe 45->63         started        65 WerFault.exe 45->65         started        67 conhost.exe 53->67         started        file15 signatures16 process17
Score:
100%
Verdict:
Malware
File Type:
ARCHIVE
Link:
https://malprob.io/report/2fe91ae0e4839ae3fb202495f0ab07bdd08c0f06209de131a1660d9a0c834836
Verdict:
Malware
YARA:
5 match(es)
Tags:
.Net ADODB.Stream Batch Command CAB:COMPRESSION:MSZIP DeObfuscated Executable Managed .NET Office Document PDB Path PE (Portable Executable) PE File Layout PowerShell PowerShell Call Scripting.FileSystemObject SOS: 0.00 SOS: 0.01 SOS: 0.04 SOS: 0.06 SOS: 0.11 SOS: 0.13 SOS: 0.14 SOS: 0.15 SOS: 0.16 SOS: 0.17 SOS: 0.18 SOS: 0.19 SOS: 0.20 SOS: 0.21 SOS: 0.22 SOS: 0.23 SOS: 0.24 SOS: 0.25 SOS: 0.26 SOS: 0.27 SOS: 0.28 SOS: 0.29 SOS: 0.30 SOS: 0.31 SOS: 0.32 SOS: 0.35 SOS: 0.39 SOS: 0.40 SOS: 0.41 SOS: 0.43 SOS: 0.47 SOS: 0.52 SOS: 0.68 SOS: 0.73 WScript.Shell
Link:
https://app.malva.re/file/16a123f5f1e6627600586bb3d271288a
Gathering data
Verdict:
Malicious
Threat:
Family.DONUTLOADER
Link:
https://tip.neiki.dev/file/2fe91ae0e4839ae3fb202495f0ab07bdd08c0f06209de131a1660d9a0c834836
Threat name:
Win32.Trojan.Qwexlafiba
Create hunting rule
Status:
Malicious
First seen:
2026-04-02 11:04:34 UTC
File Type:
Binary (Archive)
Extracted files:
814
AV detection:
6 of 24 (25.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=f7urvyheqonoh6zaesk7bkyhxxiiydygeco6cmnbmygzudedja3a._file
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:donutloader family:quasar defense_evasion discovery execution loader persistence privilege_escalation ransomware spyware trojan
Link:
https://tria.ge/reports/260402-m6dzkagz6p/
Behaviour
Checks SCSI registry key(s)
Gathers network information
Modifies data under HKEY_USERS
Modifies registry class
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: LoadsDriver
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Uses Volume Shadow Copy service COM API
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
Event Triggered Execution: Installer Packages
Event Triggered Execution: Netsh Helper DLL
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Drops file in System32 directory
Checks installed software on the system
Enumerates connected drives
Network Service Discovery
Executes dropped EXE
Loads dropped DLL
Unexpected DNS network traffic destination
Drops file in Drivers directory
Modifies Windows Firewall
Detects DonutLoader
DonutLoader
Donutloader family
Quasar RAT
Quasar family
Quasar payload
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:CMD_Ping_Localhost
Create hunting rule
Rule name:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
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:detect_powershell
Create hunting rule
Author:daniyyell
Description:Detects suspicious PowerShell activity related to malware execution
Rule name:detect_tiny_vbs
Create hunting rule
Author:daniyyell
Description:Detects tiny VBS delivery technique
Rule name:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
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_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:malware_shellcode_hash
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:Suspicious_Process
Create hunting rule
Author:Security Research Team
Description:Suspicious process creation
Rule name:Sus_All_Windows_PE_Malware
Create hunting rule
Author:DiegoAnalytics
Description:Detects Windows PE malware of all types, avoids non-executables like .html
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)
Rule name:telebot_framework
Create hunting rule
Author:vietdx.mb
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:TH_AntiVM_MassHunt_Win_Malware_2026_CYFARE
Create hunting rule
Author:CYFARE
Description:Detects Windows malware employing anti-VM / anti-sandbox evasion techniques across VMware, VirtualBox, Hyper-V, QEMU, Xen, and generic sandbox environments
Reference:https://cyfare.net/
Rule name:VECT_Ransomware
Create hunting rule
Author:Mustafa Bakhit
Description:Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

File information

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

Web download

QuasarRAT

Microsoft Software Installer (MSI) msi 2fe91ae0e4839ae3fb202495f0ab07bdd08c0f06209de131a1660d9a0c834836

(this sample)

  
Link
https://tria.ge/260402-msp5nsbx7x/behavioral3
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/60204/

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