MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef99b1fde610f8d8348ffe784852789eff4aff37aec92439c7076f793940b305. 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: 11


Intelligence 11 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef99b1fde610f8d8348ffe784852789eff4aff37aec92439c7076f793940b305
SHA3-384 hash: 6b10a7dff93fba5a1c7fdcaf5a2a86a3e87c38c9cb97da9826a08f55fad2fe5478b7bd2e54049c47154dbf15ba0c4f95
SHA1 hash: c4f7af056d09e087af380a6891cebf9d33ca124a
MD5 hash: f416bdb17daf4b30b55b760b1d4884db
humanhash: vermont-september-april-bluebird
File name:iaminthebestdutyservicewithgreatnessgiven.hta
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:2'013 bytes
First seen:2025-03-20 10:02:24 UTC
Last seen:Never
File type:HTML Application (hta) hta
MIME type:text/html
ssdeep 24:hPgWw2dSATWh9HaJTNdTz/zyBDcxrypwya8qjxMCO:tgNqS196JTTz/z+DsFnqCO
Threatray 693 similar samples on MalwareBazaar
TLSH T1BE412629581642DA047F05EB2C92D524F593429BD12A982E3A4CC5326FF4BDF47D92CE
Magika vba
Reporter abuse_ch
Tags:hta RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
111
Origin country :
DE DE
Vendor Threat Intelligence
Verdict:
Malicious
Score:
90.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67dbe7ee115e7b48b48f1179
Tags:
stration spawn sage
Result
Verdict:
Malicious
File Type:
HTA File - Malicious
Link:
https://app.docguard.net/ef99b1fde610f8d8348ffe784852789eff4aff37aec92439c7076f793940b305/results/dashboard
Payload URLs
URL
File name
https://paste.ee/d/FF1mzpTG/0
HTA File
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd evasive lolbin timeout wscript
Link:
https://www.filescan.io/uploads/67dbe7fa5ca829f67322aac9/reports/edf23fa4-4fa7-4fbb-a8bb-29819866cddd/overview
Verdict:
Malicious
Labled as:
VBS/TrojanDownloader.Agent
Link:
https://www.hybrid-analysis.com/sample/ef99b1fde610f8d8348ffe784852789eff4aff37aec92439c7076f793940b305
Result
Verdict:
UNKNOWN
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.spre.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1644086
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Command shell drops VBS files
Connects to a pastebin service (likely for C&C)
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Delayed program exit found
Detected Remcos RAT
Found malware configuration
Injects a PE file into a foreign processes
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Legitimate Application Dropped Script
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Remcos
Sigma detected: Script Initiated Connection to Non-Local Network
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Suspicious MSHTA Child Process
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: Windows Shell/Scripting Application File Write to Suspicious Folder
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
System process connects to network (likely due to code injection or exploit)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected Powershell decode and execute
Yara detected Powershell download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected VBS Downloader Generic
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1644086 Sample: iaminthebestdutyservicewith... Startdate: 20/03/2025 Architecture: WINDOWS Score: 100 44 paste.ee 2->44 46 geoplugin.net 2->46 64 Suricata IDS alerts for network traffic 2->64 66 Found malware configuration 2->66 68 Malicious sample detected (through community Yara rule) 2->68 72 18 other signatures 2->72 10 mshta.exe 2 2->10         started        signatures3 70 Connects to a pastebin service (likely for C&C) 44->70 process4 file5 36 C:\Windows\Temp\postmarks.bat, DOS 10->36 dropped 13 cmd.exe 2 10->13         started        process6 file7 38 C:\Windows\Temp\bibliophilic.vbs, ASCII 13->38 dropped 78 Command shell drops VBS files 13->78 17 wscript.exe 14 13->17         started        21 conhost.exe 13->21         started        23 timeout.exe 1 13->23         started        signatures8 process9 dnsIp10 42 paste.ee 23.186.113.60, 443, 49714 KLAYER-GLOBALNL Reserved 17->42 56 System process connects to network (likely due to code injection or exploit) 17->56 58 Suspicious powershell command line found 17->58 60 Wscript starts Powershell (via cmd or directly) 17->60 62 2 other signatures 17->62 25 powershell.exe 15 15 17->25         started        signatures11 process12 dnsIp13 48 69.48.201.40, 49716, 80 SRS-6-Z-7381US United States 25->48 50 217.154.16.81, 49719, 80 KCOM-SPNService-ProviderNetworkex-MistralGB United Kingdom 25->50 74 Writes to foreign memory regions 25->74 76 Injects a PE file into a foreign processes 25->76 29 CasPol.exe 4 15 25->29         started        34 conhost.exe 25->34         started        signatures14 process15 dnsIp16 52 216.9.225.133, 10890, 49732 ATT-INTERNET4US Reserved 29->52 54 geoplugin.net 178.237.33.50, 49733, 80 ATOM86-ASATOM86NL Netherlands 29->54 40 C:\Users\user\AppData\Local\Temp\...\logs.dat, data 29->40 dropped 80 Contains functionality to bypass UAC (CMSTPLUA) 29->80 82 Detected Remcos RAT 29->82 84 Contains functionalty to change the wallpaper 29->84 86 5 other signatures 29->86 file17 signatures18
Score:
0%
Verdict:
Benign
File Type:
SCRIPT
Link:
https://malprob.io/report/ef99b1fde610f8d8348ffe784852789eff4aff37aec92439c7076f793940b305
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ef99b1fde610f8d8348ffe784852789eff4aff37aec92439c7076f793940b305/
Threat name:
Script-WScript.Trojan.Remcos
Create hunting rule
Status:
Malicious
First seen:
2025-03-19 14:48:00 UTC
File Type:
Text (HTML)
Extracted files:
1
AV detection:
11 of 36 (30.56%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=56m3d7pgcd4nqnep7z4equtyt37uv7zxv3esiooha5xxsokawmcq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
02a3bd948e6463c2dc29482b77286aa13e7c76043a16fffd0b0ce05e53c1c68e
RemcosRAT
0a49388831b59889e4ef8e73a28c502e357a1a943a63ae2d44bae6637aff796a
RemcosRAT
2bc8d61404e72f2eb612343614a9972fc8adbe09c1d00a5cf91a9e7e41036291
RemcosRAT
3e49d70f9760a923912c03f409100f2d54bd04e05e91ff2a626bae414a08ca6a
RemcosRAT
6711c242230b0e6838533c8b15f8944904aecc62f5f6f2b567f13e48dc8ec8c4
RemcosRAT
87e631fb93fc2aff5d101ec977978df26ef3b577739fa2b0dd659acb02a66ade
RemcosRAT
ae57ca5e5949a61cbd760060312b9e31a932cedec6026a4b99b0254af954d863
RemcosRAT
cea3a71806ecfdd4c4ba8a81c7cab7e2e3e30cd1da823cd3e4b145a949cc3617
RemcosRAT
db0957f9d8a95431403d63b33f7c424a5593424ceaf6aefb25694557a2e558b3
RemcosRAT
ef99b1fde610f8d8348ffe784852789eff4aff37aec92439c7076f793940b305
RemcosRAT
error
RemcosRAT
+ 683 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost discovery execution rat
Link:
https://tria.ge/reports/250320-l3hynszwby/
Behaviour
Delays execution with timeout.exe
Modifies Internet Explorer settings
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Command and Scripting Interpreter: PowerShell
Checks computer location settings
Blocklisted process makes network request
Remcos
Remcos family
Malware Config
C2 Extraction:
216.9.225.133:10890
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Remcos
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/ef99b1fde610f8d8348ffe784852789eff4aff37aec92439c7076f793940b305

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:SUSP_Websites
Create hunting rule
Author:SECUINFRA Falcon Team
Description:Detects the reference of suspicious sites that might be used to download further malware

File information

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

Web download

RemcosRAT

HTML Application (hta) hta ef99b1fde610f8d8348ffe784852789eff4aff37aec92439c7076f793940b305

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3483448/
  
Delivery method
Distributed via web download

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