MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b6f3ca45b91abcf36da7f3233065170ea55a65a03aa8baa62ee0801a480ceb6b. 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 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b6f3ca45b91abcf36da7f3233065170ea55a65a03aa8baa62ee0801a480ceb6b
SHA3-384 hash: 4cebf73574452028ffb62345cf60201c9c182bd0d388a83b38c112c588f3954248ca5ce1ff7443b05e0efd67d73e5d25
SHA1 hash: e9aa64aafe760eddd8f2d4d3062b5901c75a9dc7
MD5 hash: f2bd596fb9d3765c321165c961aa9a91
humanhash: chicken-green-purple-mockingbird
File name:Brenntag_purchase_order_72877893u82_request_for_quotations_specifications_new_docs.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:40'330 bytes
First seen:2026-05-04 14:44:12 UTC
Last seen:2026-05-04 15:10:13 UTC
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 768:E1xO5Z+et9KhhhhhhhhhhhhhhhhhUlUHRTdiU3vAVHVPwWd0c:EKKl8q81
TLSH T1D1038D16729FDA0860A356C945AF13744B5F766E1FBF4089008DEECC8FE3521989B7A2
TrID 66.6% (.TXT) Text - UTF-16 (LE) encoded (2000/1)
33.3% (.MP3) MP3 audio (1000/1)
Magika vba
Reporter lowmal3
Tags:js RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
124
Origin country :
DE DE
Vendor Threat Intelligence
Gathering data
Detection(s):
Sanesecurity.Malware.26866.JsHeur.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 masquerade obfuscated powershell powershell powershell repaired
Link:
https://www.filescan.io/uploads/69f8b0ccdf14f1cb2ac9a5c4/reports/c594b1a6-33b3-4f41-b522-33e57410200c/overview
Verdict:
Suspicious
Labled as:
PowerShell/TrojanDownloader.Agent
Link:
https://www.hybrid-analysis.com/sample/b6f3ca45b91abcf36da7f3233065170ea55a65a03aa8baa62ee0801a480ceb6b
Verdict:
Malicious
File Type:
js
First seen:
2026-05-04T06:18:00Z UTC
Last seen:
2026-05-05T12:58:00Z UTC
Hits:
~1000
Detections:
PDM:Trojan.Win32.Generic Trojan.JS.SAgent.sb HEUR:Trojan.Script.Generic HEUR:Trojan.PowerShell.Generic
Link:
https://opentip.kaspersky.com/b6f3ca45b91abcf36da7f3233065170ea55a65a03aa8baa62ee0801a480ceb6b/results?tab=lookup
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1908152
Signature
.NET source code contains method to dynamically call methods (often used by packers)
AI detected malicious Powershell script
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
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 functionality to steal Internet Explorer form passwords
Contains functionalty to change the wallpaper
Creates autostart registry keys with suspicious values (likely registry only malware)
Creates multiple autostart registry keys
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Hides threads from debuggers
Injects a PE file into a foreign processes
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
JScript performs obfuscated calls to suspicious functions
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Self deletion via cmd or bat file
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Execution of Powershell Script in Public Folder
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: Windows Shell/Scripting Application File Write to Suspicious Folder
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Unusual module load detection (module proxying)
Uses dynamic DNS services
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
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 MSIL Injector
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1908152 Sample: Brenntag_purchase_order_728... Startdate: 04/05/2026 Architecture: WINDOWS Score: 100 110 lastore7kajp1.duckdns.org 2->110 112 smarthomy.cl 2->112 114 andrefelipedonascime1775471117328.2082219.meusitehostgator.com.br 2->114 140 Suricata IDS alerts for network traffic 2->140 142 Found malware configuration 2->142 144 Malicious sample detected (through community Yara rule) 2->144 148 17 other signatures 2->148 12 wscript.exe 1 1 2->12         started        15 cmd.exe 2->15         started        17 cmd.exe 2->17         started        19 cmd.exe 2->19         started        signatures3 146 Uses dynamic DNS services 110->146 process4 signatures5 176 JScript performs obfuscated calls to suspicious functions 12->176 178 Suspicious powershell command line found 12->178 180 Wscript starts Powershell (via cmd or directly) 12->180 182 4 other signatures 12->182 21 powershell.exe 17 12->21         started        25 powershell.exe 15->25         started        27 conhost.exe 15->27         started        29 powershell.exe 17->29         started        31 conhost.exe 17->31         started        33 powershell.exe 19->33         started        35 conhost.exe 19->35         started        process6 file7 98 C:\Users\Public\yrnvr.ps1, Unicode 21->98 dropped 168 Self deletion via cmd or bat file 21->168 170 Suspicious execution chain found 21->170 172 Found suspicious powershell code related to unpacking or dynamic code loading 21->172 37 powershell.exe 14 18 21->37         started        40 conhost.exe 21->40         started        42 conhost.exe 25->42         started        44 conhost.exe 29->44         started        46 conhost.exe 33->46         started        signatures8 process9 dnsIp10 116 andrefelipedonascime1775471117328.2082219.meusitehostgator.com.br 172.64.145.200, 443, 49718, 49721 CLOUDFLARENETUS United States 37->116 48 powershell.exe 17 37->48         started        process11 dnsIp12 108 smarthomy.cl 45.239.218.18, 443, 49720 INTERPITTELECOMUNICACIONESLTDACL Brazil 48->108 94 C:\Users\user\AppData\LocalLow\...\szmsb.ps1, ASCII 48->94 dropped 96 C:\Users\user\AppData\LocalLow\...\rnqhr.ps1, Unicode 48->96 dropped 136 Self deletion via cmd or bat file 48->136 138 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 48->138 53 powershell.exe 8 48->53         started        56 cmd.exe 1 48->56         started        58 cmd.exe 1 48->58         started        60 6 other processes 48->60 file13 signatures14 process15 signatures16 150 Writes to foreign memory regions 53->150 152 Hides threads from debuggers 53->152 154 Injects a PE file into a foreign processes 53->154 62 RegAsm.exe 53->62         started        67 powershell.exe 53->67         started        69 conhost.exe 53->69         started        71 powershell.exe 53->71         started        156 Suspicious powershell command line found 56->156 158 Wscript starts Powershell (via cmd or directly) 56->158 73 powershell.exe 56->73         started        75 conhost.exe 56->75         started        160 Uses ping.exe to sleep 58->160 162 Uses ping.exe to check the status of other devices and networks 58->162 77 PING.EXE 1 58->77         started        164 Creates autostart registry keys with suspicious values (likely registry only malware) 60->164 166 Creates multiple autostart registry keys 60->166 79 PING.EXE 1 60->79         started        81 2 other processes 60->81 process17 dnsIp18 118 lastore7kajp1.duckdns.org 172.111.232.230, 49722, 49723, 49724 AMANAHA-NEWCA United States 62->118 100 C:\Users\user\AppData\Roaming\lamprs.dat, data 62->100 dropped 102 C:\...\fpfuwnoyfrvxmjhwfsifqtzlkptjknhdqr.vbs, data 62->102 dropped 104 C:\Users\user\AppData\...\Login Data.tmp, SQLite 62->104 dropped 106 2 other malicious files 62->106 dropped 122 Contains functionality to bypass UAC (CMSTPLUA) 62->122 124 Contains functionalty to change the wallpaper 62->124 126 Contains functionality to steal Internet Explorer form passwords 62->126 134 6 other signatures 62->134 83 wscript.exe 62->83         started        85 powershell.exe 67->85         started        128 Writes to foreign memory regions 73->128 130 Hides threads from debuggers 73->130 132 Injects a PE file into a foreign processes 73->132 87 RegAsm.exe 73->87         started        90 conhost.exe 73->90         started        92 powershell.exe 73->92         started        120 127.0.0.1 unknown unknown 79->120 file19 signatures20 process21 signatures22 174 Installs a global keyboard hook 87->174
Score:
98%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/b6f3ca45b91abcf36da7f3233065170ea55a65a03aa8baa62ee0801a480ceb6b
Gathering data
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b6f3ca45b91abcf36da7f3233065170ea55a65a03aa8baa62ee0801a480ceb6b/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/b6f3ca45b91abcf36da7f3233065170ea55a65a03aa8baa62ee0801a480ceb6b
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w3z4urnzdk6pg3nh6mrtazixb2svuznahkulvjro4cabusam5nvq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos defense_evasion discovery execution persistence rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/260504-r4ekjahz7p/
Behaviour
Modifies registry class
Runs ping.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
System policy modification
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
System Network Configuration Discovery: Internet Connection Discovery
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Checks installed software on the system
Command and Scripting Interpreter: PowerShell
Indicator Removal: File Deletion
.NET Reactor proctector
Checks computer location settings
Reads user/profile data of web browsers
Badlisted process makes network request
Family: Remcos
Suricata alert: REMCOS RAT Malware Inbound C2 Communication
Suricata alert: REMCOS RAT Malware Outbound C2 Communication
UAC bypass
Malware family:
DesckVB-RAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b6f3ca45b91a/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

File information

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

Malspam

RemcosRAT

Java Script (JS) js b6f3ca45b91abcf36da7f3233065170ea55a65a03aa8baa62ee0801a480ceb6b

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments