MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e83a7f188ce669f2c40f7698c3ad038a491a4c007b6a8830894342c5ccf2a6e3. 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


Nitol


Vendor detections: 10


Intelligence 10 IOCs YARA 30 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e83a7f188ce669f2c40f7698c3ad038a491a4c007b6a8830894342c5ccf2a6e3
SHA3-384 hash: eef79978d3ce2d6f7294bf06e819d151c1d766c0636052ffe6ceae443402cd864295b8194cde903f97ae2e247cd947d8
SHA1 hash: 30917c3b78038b77b53f0468c0721b8fa48d20ac
MD5 hash: 01cb354fbf7d5ab0d1096a2a857136a5
humanhash: fillet-seven-queen-early
File name:MeganVPN-letes1.5.5.37.exe
Download: download sample
Signature Nitol
Create hunting rule
File size:22'912'259 bytes
First seen:2025-05-31 20:21:24 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 357b59ff56f808887438b8bd8ad0eaa6 (12 x Nitol)
ssdeep 393216:Yec+WarpzmzGnkfV8tfGWcSWNKQ/kg/bZzvtMA63NiSA:gihmSkOtfGWcSWJZzlAi
TLSH T1AF37015276F840F5D0BA8139C9928A4BD2F2B8410B35C7CF41A45AAD1F377E24D3AF66
TrID 44.4% (.EXE) Win64 Executable (generic) (10522/11/4)
21.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
8.7% (.ICL) Windows Icons Library (generic) (2059/9)
8.5% (.EXE) OS/2 Executable (generic) (2029/13)
8.4% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
dhash icon fadadac2a2b8c4e4 (11 x Nitol, 2 x Amadey, 2 x AgentTesla)
Reporter aachum
Tags:exe huazai168-com Nitol


Avatar
iamaachum
https://tiaojuan.com/ => https://gnexbns.top/MeganVPN-letes1.5.5.37.zip

C2: huazai168.com

Intelligence

File Origin
# of uploads :
1
# of downloads :
503
Origin country :
ES ES
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
MeganVPN-letes1.5.5.37.exe
Verdict:
Malicious activity
Analysis date:
2025-05-31 20:24:29 UTC
Tags:
auto-reg upx antivm websocket
Link:
https://app.any.run/tasks/eb513503-0e75-448f-ba28-a1ad0a8d1d6f

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/6593/
Detection(s):
PUA.Win.Trojan.Winlock-6629293-0
Create hunting rule

MiscreantPunch.SingleXOR.EXE.7.UNOFFICIAL
Create hunting rule

MiscreantPunch.SingleXOR.EXE.123.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.W32.Agent.FNS.tr.dldr.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
97.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=683b6994668438e362e928c8
Tags:
dropper emotet virus shell
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Сreating synchronization primitives
Searching for synchronization primitives
Creating a process from a recently created file
Creating a window
Launching a process
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
Creating a file
Creating a file in the Program Files subdirectories
Searching for the window
Running batch commands
Enabling the 'hidden' option for recently created files
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
adaptive-context base64 datper expired-cert explorer fingerprint fingerprint installer invalid-signature lolbin microsoft_visual_cc msiexec obfuscated overlay overlay packed powershell regsvr32 runonce signed xor-pe zero
Link:
https://www.filescan.io/uploads/683b652bfd02ed5e0591d4c7/reports/839e6029-6938-44e5-a3e7-0184ba8e5cd0/overview
Verdict:
Malicious
Labled as:
Trojan_Win32_Wacatac_B_ml
Link:
https://www.hybrid-analysis.com/sample/e83a7f188ce669f2c40f7698c3ad038a491a4c007b6a8830894342c5ccf2a6e3
Result
Threat name:
Nitol
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
90 / 100
Link:
https://www.joesandbox.com/analysis/1703080
Signature
Allocates memory in foreign processes
Bypasses PowerShell execution policy
Changes security center settings (notifications, updates, antivirus, firewall)
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to modify Windows User Account Control (UAC) settings
Creates multiple autostart registry keys
Disable UAC(promptonsecuredesktop)
Disables UAC (registry)
Found evasive API chain checking for user administrative privileges
Found suspicious powershell code related to unpacking or dynamic code loading
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Modifies the DNS server
Modifies the windows firewall
Multi AV Scanner detection for submitted file
Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes)
Sample is not signed and drops a device driver
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Suspect Svchost Activity
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses netsh to modify the Windows network and firewall settings
Uses schtasks.exe or at.exe to add and modify task schedules
Uses threadpools to delay analysis
Writes to foreign memory regions
Yara detected Nitol
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1703080 Sample: MeganVPN-letes1.5.5.37.exe Startdate: 31/05/2025 Architecture: WINDOWS Score: 90 125 yandex.com 2->125 127 www.yandex.com 2->127 129 12 other IPs or domains 2->129 149 Malicious sample detected (through community Yara rule) 2->149 151 Multi AV Scanner detection for submitted file 2->151 153 Yara detected Nitol 2->153 155 10 other signatures 2->155 10 MeganVPN-letes1.5.5.37.exe 4 2->10         started        13 svchost.exe 2->13         started        16 sppsvc.exe 2->16         started        18 9 other processes 2->18 signatures3 process4 dnsIp5 115 C:\Users\user\AppData\Local\...\lua5.1.dll, PE32+ 10->115 dropped 117 C:\Users\user\AppData\Local\...\irsetup.exe, PE32+ 10->117 dropped 21 irsetup.exe 12 10->21         started        157 Changes security center settings (notifications, updates, antivirus, firewall) 13->157 24 MpCmdRun.exe 13->24         started        159 Uses threadpools to delay analysis 16->159 131 127.0.0.1 unknown unknown 18->131 161 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 18->161 163 Modifies the DNS server 18->163 26 drvinst.exe 18->26         started        28 drvinst.exe 18->28         started        30 iusb3mon.exe 18->30         started        file6 signatures7 process8 file9 99 C:\Users\user\AppData\Local\...\iusb3mon.exe, PE32 21->99 dropped 101 C:\Program Files\Your Product\LetsVPN.exe, PE32 21->101 dropped 103 C:\Users\user\AppData\...\vcruntime140.dll, PE32 21->103 dropped 105 C:\Users\user\AppData\Local\...\msvcp140.dll, PE32 21->105 dropped 32 LetsVPN.exe 21->32         started        36 iusb3mon.exe 21->36         started        39 powershell.exe 11 21->39         started        43 6 other processes 21->43 41 conhost.exe 24->41         started        107 C:\Windows\System32\...\tap0901.sys (copy), PE32+ 26->107 dropped 109 C:\Windows\System32\...\SET8C02.tmp, PE32+ 26->109 dropped 111 C:\Windows\System32\...\tap0901.sys (copy), PE32+ 28->111 dropped 113 C:\Windows\System32\drivers\SET9586.tmp, PE32+ 28->113 dropped process10 dnsIp11 85 C:\Program Files (x86)\...\tap0901.sys, PE32+ 32->85 dropped 87 C:\Program Files (x86)\...\LetsPRO.exe, PE32 32->87 dropped 89 C:\Program Files (x86)\...\LetsPRO.exe.config, XML 32->89 dropped 93 219 other files (1 malicious) 32->93 dropped 135 Sample is not signed and drops a device driver 32->135 45 LetsPRO.exe 32->45         started        47 powershell.exe 32->47         started        50 tapinstall.exe 32->50         started        59 8 other processes 32->59 133 huazai168.com 8.217.170.91, 25448, 49727, 49728 CNNIC-ALIBABA-US-NET-APAlibabaUSTechnologyCoLtdC Singapore 36->133 91 C:\Users\user\AppData\Local\...\6273328_t.xml, XML 36->91 dropped 137 Suspicious powershell command line found 36->137 139 Creates multiple autostart registry keys 36->139 141 Contains functionality to capture and log keystrokes 36->141 143 9 other signatures 36->143 53 cmd.exe 36->53         started        55 powershell.exe 36->55         started        61 3 other processes 36->61 57 conhost.exe 39->57         started        63 6 other processes 43->63 file12 signatures13 process14 file15 65 LetsPRO.exe 45->65         started        165 Loading BitLocker PowerShell Module 47->165 69 conhost.exe 47->69         started        95 C:\Users\user\AppData\...\tap0901.sys (copy), PE32+ 50->95 dropped 97 C:\Users\user\AppData\Local\...\SET86B3.tmp, PE32+ 50->97 dropped 71 conhost.exe 50->71         started        167 Uses schtasks.exe or at.exe to add and modify task schedules 53->167 169 Uses netsh to modify the Windows network and firewall settings 53->169 73 conhost.exe 53->73         started        75 schtasks.exe 53->75         started        171 Found suspicious powershell code related to unpacking or dynamic code loading 55->171 81 2 other processes 55->81 83 13 other processes 59->83 77 conhost.exe 61->77         started        79 schtasks.exe 61->79         started        signatures16 process17 dnsIp18 119 yandex.com 77.88.44.55, 443, 49744 YANDEXRU Russian Federation 65->119 121 23.98.101.155, 443, 49750, 49767 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 65->121 123 12 other IPs or domains 65->123 145 Creates multiple autostart registry keys 65->145 147 Loading BitLocker PowerShell Module 65->147 signatures19
Score:
47%
Verdict:
Susipicious
File Type:
PE
Link:
https://malprob.io/report/e83a7f188ce669f2c40f7698c3ad038a491a4c007b6a8830894342c5ccf2a6e3
Gathering data
Threat name:
Win64.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-05-29 17:01:35 UTC
File Type:
PE+ (Exe)
Extracted files:
811
AV detection:
13 of 24 (54.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=5a5h6gem4zu7frapo2mmhlidrjerutaapnviqmejinbmlthsu3rq._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
defense_evasion discovery execution persistence privilege_escalation trojan upx
Link:
https://tria.ge/reports/250531-y533vaxvcy/
Behaviour
Checks SCSI registry key(s)
Checks processor information in registry
Gathers network information
Modifies data under HKEY_USERS
Modifies system certificate store
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
System policy modification
Enumerates physical storage devices
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
Suspicious use of SetThreadContext
UPX packed file
Adds Run key to start application
Checks installed software on the system
Checks whether UAC is enabled
Command and Scripting Interpreter: PowerShell
Indicator Removal: File Deletion
Network Service Discovery
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Drops file in Drivers directory
Modifies Windows Firewall
UAC bypass
Verdict:
Informative
Tags:
trojan
YARA:
Windows_Trojan_TwistedTinsel_aa56e527
Link:
https://app.threat.zone/submission/d29ccbbe-0169-4f33-b3a9-df4bda89f68a
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/e83a7f188ce6/report/overview.html
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
Create hunting rule
Author:phoul (@phoul)
Description:Look for Blowfish constants
Rule name:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:command_and_control
Create hunting rule
Author:CD_R0M_
Description:This rule searches for common strings found by malware using C2. Based on a sample used by a Ransomware group
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:DebuggerException__SetConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:dgaaga
Create hunting rule
Author:Harshit
Description:Detects suspicious PowerShell or registry activity
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:grakate_stealer_nov_2021
Create hunting rule
Rule name:INDICATOR_SUSPICIOUS_EXE_ClearMyTracksByProcess
Create hunting rule
Author:ditekSHen
Description:Detects executables calling ClearMyTracksByProcess
Rule name:INDICATOR_SUSPICIOUS_References_SecTools
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many IR and analysis tools
Rule name:malware_shellcode_hash
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_peb_parsing
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:SUSP_XORed_MSDOS_Stub_Message
Create hunting rule
Author:Florian Roth
Description:Detects suspicious XORed MSDOS stub message
Reference:https://yara.readthedocs.io/en/latest/writingrules.html#xor-strings
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:UPXProtectorv10x2
Create hunting rule
Author:malware-lu
Rule name:UPXV200V290MarkusOberhumerLaszloMolnarJohnReiser
Create hunting rule
Author:malware-lu
Rule name:upx_largefile
Create hunting rule
Author:k3nr9
Rule name:vmdetect
Create hunting rule
Author:nex
Description:Possibly employs anti-virtualization techniques
Rule name:Windows_Trojan_TwistedTinsel_aa56e527
Create hunting rule
Author:Elastic Security

File information

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

Web download

Nitol

Executable exe e83a7f188ce669f2c40f7698c3ad038a491a4c007b6a8830894342c5ccf2a6e3

(this sample)

  
Link
https://tria.ge/250531-x9zqjsgq4s/behavioral1
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/6593/

Comments