MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4a4d4e50959a6853fbf3ba58b9bb8c89d9e8b0ed0a52ee48d0496a233cb1572d. 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: 13


Intelligence 13 IOCs YARA File information Comments

SHA256 hash: 4a4d4e50959a6853fbf3ba58b9bb8c89d9e8b0ed0a52ee48d0496a233cb1572d
SHA3-384 hash: c9a3b97fde774355f54a1010840be12ddf9de3d241efe16ff3b8d0e449be436267a4dcaffd2e9287bbbf684b39553cf7
SHA1 hash: ff35c6968085dc2427b855c035f508a5cec95dba
MD5 hash: f785afe49d098f8fbac776f8fbfee8d8
humanhash: crazy-victor-montana-coffee
File name:PO_28918370932,PDF.js
Download: download sample
Signature RemcosRAT
File size:1'342'367 bytes
First seen:2026-01-16 16:33:31 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 3072:3223jCAuPreBrl9MQm0BPlhF43FL5xIVp58DrWM3t2BsPnFFtE/XrnHtLNv9QNIC:W
Threatray 1'989 similar samples on MalwareBazaar
TLSH T1F555B97770BFBEB91F7150E6E6E1BA5D5EF5606B13824608B119EDCB405A0CEAB03432
Magika javascript
Reporter abuse_ch
Tags:js RemcosRAT

Intelligence


File Origin
# of uploads :
1
# of downloads :
178
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Verdict:
Malicious
Score:
90.2%
Tags:
obfuscate autorun xtreme blic
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
repaired
Verdict:
Malicious
File Type:
js
First seen:
2026-01-15T21:04:00Z UTC
Last seen:
2026-01-18T03:46:00Z UTC
Hits:
~100
Detections:
HEUR:Trojan.Script.Generic Trojan.VBS.SAgent.sb PDM:Trojan.Win32.Generic Trojan.JS.SAgent.sb HEUR:Trojan-Downloader.Script.Generic HEUR:Trojan.Script.Startup.gen
Result
Threat name:
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
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
Creates processes via WMI
Detected Remcos RAT
Drops script or batch files to the startup folder
Found hidden mapped module (file has been removed from disk)
Found malware configuration
Injects a PE file into a foreign processes
JavaScript source code contains functionality to generate code involving a shell, file or stream
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Drops script at startup location
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: PowerShell Base64 Encoded Reflective Assembly Load
Sigma detected: Remcos
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
Unusual module load detection (module proxying)
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 Generic Downloader
Yara detected MSILDownloaderGeneric
Yara detected Powershell decode and execute
Yara detected Powershell download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1852195 Sample: PO_28918370932,PDF.js Startdate: 16/01/2026 Architecture: WINDOWS Score: 100 51 resc.cloudinary.com.cdn.cloudflare.net 2->51 53 res.cloudinary.com 2->53 59 Suricata IDS alerts for network traffic 2->59 61 Found malware configuration 2->61 63 Malicious sample detected (through community Yara rule) 2->63 65 20 other signatures 2->65 8 powershell.exe 14 15 2->8         started        12 wscript.exe 1 3 2->12         started        15 wscript.exe 1 2->15         started        signatures3 process4 dnsIp5 55 192.3.171.243, 49691, 49697, 80 AS-COLOCROSSINGUS United States 8->55 57 resc.cloudinary.com.cdn.cloudflare.net 104.16.78.6, 443, 49689, 49696 CLOUDFLARENETUS United States 8->57 79 Writes to foreign memory regions 8->79 81 Injects a PE file into a foreign processes 8->81 83 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 8->83 17 dllhst3g.exe 4 3 8->17         started        22 conhost.exe 8->22         started        45 C:\...\PO_28918370932,PDF.js:Zone.Identifier, ASCII 12->45 dropped 47 C:\Users\user\...\PO_28918370932,PDF.js, Unicode 12->47 dropped 85 Suspicious powershell command line found 12->85 87 Wscript starts Powershell (via cmd or directly) 12->87 89 Drops script or batch files to the startup folder 12->89 91 3 other signatures 12->91 24 powershell.exe 15->24         started        file6 signatures7 process8 dnsIp9 49 192.3.136.208, 2404, 49694, 49695 AS-COLOCROSSINGUS United States 17->49 39 C:\Users\user\AppData\Local\Temp\TH7335.tmp, MS-DOS 17->39 dropped 41 C:\Users\user\AppData\Local\Temp\TH7305.tmp, MS-DOS 17->41 dropped 43 C:\Users\user\AppData\Local\Temp\TH72E4.tmp, MS-DOS 17->43 dropped 67 Contains functionality to bypass UAC (CMSTPLUA) 17->67 69 Detected Remcos RAT 17->69 71 Contains functionalty to change the wallpaper 17->71 77 7 other signatures 17->77 26 RmClient.exe 1 17->26         started        29 RmClient.exe 1 17->29         started        31 RmClient.exe 1 17->31         started        73 Writes to foreign memory regions 24->73 75 Injects a PE file into a foreign processes 24->75 33 dllhst3g.exe 24->33         started        35 conhost.exe 24->35         started        37 dllhst3g.exe 24->37         started        file10 signatures11 process12 signatures13 93 Tries to steal Mail credentials (via file registry) 26->93 95 Tries to harvest and steal browser information (history, passwords, etc) 26->95 97 Unusual module load detection (module proxying) 26->97 99 Tries to steal Instant Messenger accounts or passwords 29->99 101 Tries to steal Mail credentials (via file / registry access) 29->101 103 Detected Remcos RAT 33->103
Gathering data
Result
Malware family:
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection discovery execution rat
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Drops startup file
Badlisted process makes network request
Command and Scripting Interpreter: PowerShell
Detected Nirsoft tools
NirSoft MailPassView
Process spawned unexpected child process
Remcos
Remcos family
Malware Config
C2 Extraction:
192.3.136.208:2404
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.

Comments