MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6b91a4147f2fa3c5de006be8fa069dc1ad9d99e496c588487c217baea3c9fe0a. 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


MassLogger


Vendor detections: 10


Intelligence 10 IOCs YARA 1 File information Comments
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SHA256 hash: 6b91a4147f2fa3c5de006be8fa069dc1ad9d99e496c588487c217baea3c9fe0a
SHA3-384 hash: 24ed36611b63dcd3201ab6ea13056917fc8e596dcfdd0f6d6cd6bc48464aeb8776295a5fdf7c70d9a65011fb2c2cb46d
SHA1 hash: a07a6b84cf226f2d581a2758148b725991aac135
MD5 hash: 255bd80598ac9f4d2500f29f56fc62b5
humanhash: london-yellow-thirteen-black
File name:MyNew.vbs
Download: download sample
Signature MassLogger
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File size:74'731 bytes
First seen:2025-01-30 08:51:20 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 1536:nVfTYSdQsWf7Di2y2OoHCW65JWX1rSHB85OX+BvsAo:nVcCQsWf74PoHC5LBx+Bvdo
Threatray 41 similar samples on MalwareBazaar
TLSH T123732C68DF1A2D85727B38E7349E41B1406AE8D1C49887BBE0989DBC0DB1EDC17F41A7
Magika vba
Reporter JAMESWT_WT
Tags:156-253-250-62 MassLogger Masslogger rat vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
95
Origin country :
IT IT
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.VBS.Agent.BXH.Eldorado.722.13644.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=679b3f3929ae628cf42b7c82
Tags:
obfuscate xtreme sage
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated powershell
Link:
https://www.filescan.io/uploads/679b3db6a2886cdc5ac6af3e/reports/a137019d-6fd9-454e-b020-959a5deaf7b1/overview
Verdict:
Malicious
Labled as:
Generik.BIFUZBW trojan
Link:
https://www.hybrid-analysis.com/sample/6b91a4147f2fa3c5de006be8fa069dc1ad9d99e496c588487c217baea3c9fe0a
Result
Verdict:
MALICIOUS
Details
Base64 Encoded Powershell Directives
Detected one or more base64 encoded Powershell directives.
Result
Threat name:
MassLogger RAT
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Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1602859
Signature
.NET source code contains a sample name check
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Bypasses PowerShell execution policy
Contains functionality to log keystrokes (.Net Source)
Creates multiple autostart registry keys
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: PowerShell Base64 Encoded Invoke Keyword
Sigma detected: Powerup Write Hijack DLL
Sigma detected: Register Wscript In Run Key
Sigma detected: Suspicious PowerShell Parameter Substring
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Tries to detect the country of the analysis system (by using the IP)
Tries to harvest and steal browser information (history, passwords, etc)
VBScript performs obfuscated calls to suspicious functions
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Wscript starts Powershell (via cmd or directly)
Yara detected AntiVM3
Yara detected MassLogger RAT
Yara detected Telegram RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1602859 Sample: MyNew.vbs Startdate: 30/01/2025 Architecture: WINDOWS Score: 100 131 reallyfreegeoip.org 2->131 133 checkip.dyndns.org 2->133 135 2 other IPs or domains 2->135 143 Sigma detected: Register Wscript In Run Key 2->143 145 Found malware configuration 2->145 147 Malicious sample detected (through community Yara rule) 2->147 151 16 other signatures 2->151 11 wscript.exe 2 2->11         started        15 wscript.exe 2->15         started        17 wscript.exe 2->17         started        19 12 other processes 2->19 signatures3 149 Tries to detect the country of the analysis system (by using the IP) 131->149 process4 file5 117 C:\Users\user\AppData\Local\Temp\c.bat, ASCII 11->117 dropped 171 VBScript performs obfuscated calls to suspicious functions 11->171 173 Wscript starts Powershell (via cmd or directly) 11->173 175 Windows Scripting host queries suspicious COM object (likely to drop second stage) 11->175 177 Suspicious execution chain found 11->177 21 cmd.exe 1 11->21         started        24 cmd.exe 15->24         started        26 cmd.exe 17->26         started        179 Loading BitLocker PowerShell Module 19->179 28 cmd.exe 19->28         started        30 cmd.exe 19->30         started        32 cmd.exe 19->32         started        34 9 other processes 19->34 signatures6 process7 signatures8 157 Suspicious powershell command line found 21->157 159 Wscript starts Powershell (via cmd or directly) 21->159 161 Bypasses PowerShell execution policy 21->161 36 cmd.exe 2 21->36         started        39 conhost.exe 21->39         started        41 cmd.exe 24->41         started        43 conhost.exe 24->43         started        45 cmd.exe 26->45         started        47 conhost.exe 26->47         started        49 2 other processes 28->49 51 2 other processes 30->51 53 2 other processes 32->53 process9 signatures10 153 Suspicious powershell command line found 36->153 155 Wscript starts Powershell (via cmd or directly) 36->155 55 powershell.exe 36->55         started        60 powershell.exe 14 35 36->60         started        62 conhost.exe 36->62         started        64 powershell.exe 41->64         started        66 2 other processes 41->66 68 3 other processes 45->68 70 2 other processes 49->70 72 2 other processes 51->72 74 2 other processes 53->74 process11 dnsIp12 137 checkip.dyndns.com 132.226.8.169, 49739, 49881, 49976 UTMEMUS United States 55->137 139 reallyfreegeoip.org 104.21.112.1, 443, 49740, 49890 CLOUDFLARENETUS United States 55->139 107 C:\Users\user\...\WindowsUpdate_715.vbs, ASCII 55->107 dropped 109 C:\Users\user\...\WindowsUpdate_715.bat, ASCII 55->109 dropped 163 Creates multiple autostart registry keys 55->163 165 Found suspicious powershell code related to unpacking or dynamic code loading 55->165 141 0x0.st 168.119.145.117, 443, 49731, 49738 HETZNER-ASDE Germany 60->141 111 C:\Users\user\AppData\...\arwb2myg.cmdline, Unicode 60->111 dropped 167 Loading BitLocker PowerShell Module 60->167 76 csc.exe 3 60->76         started        79 cmstp.exe 8 7 60->79         started        113 C:\Users\user\...\WindowsUpdate_115.bat, ASCII 64->113 dropped 169 Tries to harvest and steal browser information (history, passwords, etc) 64->169 81 csc.exe 66->81         started        83 cmstp.exe 66->83         started        115 C:\Users\user\...\WindowsUpdate_123.bat, ASCII 68->115 dropped 85 csc.exe 68->85         started        87 cmstp.exe 68->87         started        89 2 other processes 70->89 91 2 other processes 72->91 93 2 other processes 74->93 file13 signatures14 process15 file16 119 C:\Users\user\AppData\Local\...\arwb2myg.dll, PE32 76->119 dropped 95 cvtres.exe 1 76->95         started        121 C:\Users\user\AppData\Local\...\virmugef.dll, PE32 81->121 dropped 97 cvtres.exe 81->97         started        123 C:\Users\user\AppData\Local\...\iqjgseft.dll, PE32 85->123 dropped 99 cvtres.exe 85->99         started        125 C:\Users\user\AppData\Local\...\0bkwlbvh.dll, PE32 89->125 dropped 101 cvtres.exe 89->101         started        127 C:\Users\user\AppData\Local\...\swvcjp2n.dll, PE32 91->127 dropped 103 cvtres.exe 91->103         started        129 C:\Users\user\AppData\Local\...\hza5nmmf.dll, PE32 93->129 dropped 105 cvtres.exe 93->105         started        process17
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/6b91a4147f2fa3c5de006be8fa069dc1ad9d99e496c588487c217baea3c9fe0a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6b91a4147f2fa3c5de006be8fa069dc1ad9d99e496c588487c217baea3c9fe0a/
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2025-01-29 01:12:36 UTC
File Type:
Text (VBS)
AV detection:
8 of 38 (21.05%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=noi2ifd7f6r4lxqanpupubu5ygwz3gpes3cyqsd4ef525i6j7yfa._file
Verdict:
malicious
Label(s):
snakekeylogger
Create hunting rule
Similar samples:
316e5e19fa998509392801b0f285440b38c99c5853caff39011d12b5b7275253
MassLogger
36c4b76918ad0cc2990097d29fe693eb3333709e20b33b97ab12d6ccbaf3e4bc
MassLogger
431062b66c0d6b55b34049aa675cbd69534b1680cf60578f57cebacf9d4d5bb9
MassLogger
844031a92a7e8e372c63342a0b815cd8a7b7d30760c8d162b40a9febb0a5d73a
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d1bd52996d15f124682fc7c59f4a70d7b54f5a89919f8de36f09fe0efc51eb5c
MassLogger
error
MassLogger
+ 31 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
collection discovery execution persistence
Link:
https://tria.ge/reports/250130-ksqebswpcv/
Behaviour
Kills process with taskkill
Suspicious behavior: CmdExeWriteProcessMemorySpam
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in System32 directory
Accesses Microsoft Outlook profiles
Adds Run key to start application
Looks up external IP address via web service
Checks computer location settings
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
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:Base64_Encoded_Powershell_Directives
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File information

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

Web download

MassLogger

Visual Basic Script (vbs) vbs 6b91a4147f2fa3c5de006be8fa069dc1ad9d99e496c588487c217baea3c9fe0a

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3420653/
  
Delivery method
Distributed via web download

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