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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4642639dc64e95d1b2bc142a6dfec376cf55cf313370e7fd434b95a5cc792bb4. 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


RemcosRAT


Vendor detections: 10


Intelligence 10 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4642639dc64e95d1b2bc142a6dfec376cf55cf313370e7fd434b95a5cc792bb4
SHA3-384 hash: aabaf5dbd32e7ad49a05f750d710fa2bb5bbc32927eda5b4f0cd26d6b16e4ff372b4d380b84b0df192b26cdbd3ca2b79
SHA1 hash: 657caa9ed4ad20fba3442cd8ba8c7645c7e94fc0
MD5 hash: b603913323144de7e406b9f012feb430
humanhash: early-black-eleven-batman
File name:Fnblgen.vbs
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:195'700 bytes
First seen:2026-09-30 03:07:18 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 3072:PEH+egxBA9o2mcfS6enl/r8aWtOACewRJYW/o0OCaSZpoxre9k7S:Pk+egxUo2mxNfoVCeC6WA0WKCxKd
TLSH T1AA145C70ED34026A4F4717AAFCA51A62CABC8619462650F5FEDD030D60079ECE3FE66D
Magika vba
Reporter threatcat_ch
Tags:RemcosRAT vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
89
Origin country :
CH CH
Vendor Threat Intelligence
No detections
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/89795/
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd lolbin obfuscated
Link:
https://www.filescan.io/uploads/6abc7d1a5c2aaff86ae5efe6/reports/aca5adf5-ff9c-470a-b056-3c826c7498b2/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/4642639dc64e95d1b2bc142a6dfec376cf55cf313370e7fd434b95a5cc792bb4
Verdict:
Malicious
File Type:
vbs
First seen:
2026-09-29T23:32:00Z UTC
Last seen:
2026-09-30T00:06:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/4642639dc64e95d1b2bc142a6dfec376cf55cf313370e7fd434b95a5cc792bb4/results?tab=lookup
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1979752
Signature
Found suspicious powershell code related to unpacking or dynamic code loading
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Obfuscated command line found
Powershell connects to network
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Switches to a custom stack to bypass stack traces
VBScript performs obfuscated calls to suspicious functions
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
WScript reads language and country specific registry keys (likely country aware script)
Wscript starts Powershell (via cmd or directly)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1979752 Sample: Fnblgen.vbs Startdate: 30/09/2026 Architecture: WINDOWS Score: 100 27 drive.usercontent.google.com 2->27 29 drive.google.com 2->29 43 Malicious sample detected (through community Yara rule) 2->43 45 Multi AV Scanner detection for submitted file 2->45 47 Yara detected GuLoader 2->47 49 2 other signatures 2->49 9 wscript.exe 1 2->9         started        signatures3 process4 signatures5 51 VBScript performs obfuscated calls to suspicious functions 9->51 53 Wscript starts Powershell (via cmd or directly) 9->53 55 Obfuscated command line found 9->55 57 3 other signatures 9->57 12 cmd.exe 1 9->12         started        process6 signatures7 59 Wscript starts Powershell (via cmd or directly) 12->59 15 powershell.exe 1 18 12->15         started        19 conhost.exe 12->19         started        21 cmd.exe 1 12->21         started        process8 dnsIp9 31 drive.google.com 142.251.111.100, 443, 49720 GOOGLE-GoogleLLCUS United States 15->31 33 drive.usercontent.google.com 172.253.62.132, 443, 49721 GOOGLE-GoogleLLCUS United States 15->33 35 Writes to foreign memory regions 15->35 37 Found suspicious powershell code related to unpacking or dynamic code loading 15->37 39 Switches to a custom stack to bypass stack traces 15->39 41 Powershell connects to network 15->41 23 backgroundTaskHost.exe 15->23         started        25 backgroundTaskHost.exe 15->25         started        signatures10 process11
Score:
97%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/4642639dc64e95d1b2bc142a6dfec376cf55cf313370e7fd434b95a5cc792bb4
Verdict:
Malware
YARA:
1 match(es)
Tags:
COM Behavior Trace DeObfuscated Obfuscated SOS: 0.32 T1027 T1059.005 VBScript WScript.Shell
Link:
https://app.malva.re/file/b603913323144de7e406b9f012feb430
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4642639dc64e95d1b2bc142a6dfec376cf55cf313370e7fd434b95a5cc792bb4/
Gathering data
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=izbghhogj2k5dmv4cqvg37wdo3hvltzrgnyop7kdjok2ltdzfo2a._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection defense_evasion discovery execution privilege_escalation rat
Link:
https://tria.ge/reports/260930-dmyp7axydt/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
Enumerates physical storage devices
Executes a command shell one-liner
Reads the TCP/IP host and domain name from the registry
System Location Discovery: System Language Discovery
Executes a VBScript file via the Windows Script Host.
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Accesses Microsoft Outlook profiles
Contacts third-party web service commonly abused for C2
Enumerates connected drives
Checks computer location settings
Badlisted process makes network request
Family: Remcos
Malware Config
C2 Extraction:
91.92.41.94:2404
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4642639dc64e95d1b2bc142a6dfec376cf55cf313370e7fd434b95a5cc792bb4

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:Cerberus
Create hunting rule
Author:Jean-Philippe Teissier / @Jipe_
Description:Cerberus
Rule name:detect_tiny_vbs
Create hunting rule
Author:daniyyell
Description:Detects tiny VBS delivery technique
Rule name:telebot_framework
Create hunting rule
Author:vietdx.mb

File information

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

Malspam

RemcosRAT

Visual Basic Script (vbs) vbs 4642639dc64e95d1b2bc142a6dfec376cf55cf313370e7fd434b95a5cc792bb4

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/89795/

Comments