MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c3900a803dc86d1a56154be75e2d00b686a531cc123603311c185a2b297890b4. 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: 12


Intelligence 12 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c3900a803dc86d1a56154be75e2d00b686a531cc123603311c185a2b297890b4
SHA3-384 hash: 0606223be06f7a1399a9ca8e46103d48513fa4dded58d3ec91d1a974dff7ca3f904523a92a2227994f63f1a1dad71d73
SHA1 hash: 1c2ecb1a5d6f2dc362404a7c43d828937d47410d
MD5 hash: c9414e3a2137c7746dd946badc9e4029
humanhash: hawaii-colorado-six-ack
File name:Credit Note CN 014 25.26.ptf doc scanned from an Avast multifunctional device901010.JS
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:11'069'539 bytes
First seen:2026-04-16 02:24:11 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 98304:+vAuNLA4XDm58xmTpfpAXvPgHEs3+9dbZaVD1u1xO:+obgD0vFfKfIHEs3g1ZYD1cO
TLSH T1A8B6B77286A77C256EE3CBCD4035C9211C4F3467698DCB82B06EA23C5855E93C6B91FB
Magika javascript
Reporter koluke
Tags:js RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
141
Origin country :
JP JP
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Generic-EXE.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69e0486b45787c53e53a29d9
Tags:
autorun emotet
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug base64 dropper evasive formbook lolbin masquerade obfuscated obfuscated packed persistence repaired schtasks
Link:
https://www.filescan.io/uploads/69e04865799d5bf325014ae3/reports/eb13395b-b81e-4ab9-9690-c904842dca75/overview
Verdict:
Malicious
Labled as:
HEUR_Trojan_Script_Generic
Link:
https://www.hybrid-analysis.com/sample/c3900a803dc86d1a56154be75e2d00b686a531cc123603311c185a2b297890b4
Verdict:
Malicious
File Type:
js
First seen:
2026-04-13T22:43:00Z UTC
Last seen:
2026-04-18T00:28:00Z UTC
Hits:
~1000
Detections:
Trojan.Win32.Shellcode.sb Trojan-PSW.Win32.Stealer.sb Backdoor.Win32.Remcos.sb Trojan-Downloader.JS.Cryptoload.sb Backdoor.Win32.Remcos.f Backdoor.Remcos.TCP.C&C Trojan.JS.SAgent.sb HEUR:Trojan.Script.Generic HEUR:Trojan-Dropper.Script.Generic
Link:
https://opentip.kaspersky.com/c3900a803dc86d1a56154be75e2d00b686a531cc123603311c185a2b297890b4/results?tab=lookup
Score:
98%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/c3900a803dc86d1a56154be75e2d00b686a531cc123603311c185a2b297890b4
Gathering data
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/c3900a803dc86d1a56154be75e2d00b686a531cc123603311c185a2b297890b4/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/c3900a803dc86d1a56154be75e2d00b686a531cc123603311c185a2b297890b4
Threat name:
Script-JS.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2026-04-14 01:41:47 UTC
File Type:
Text (JavaScript)
AV detection:
8 of 24 (33.33%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yoiavab5zbwruvqvjptv4liaw2dkkmomci3agmi4dbncwklysc2a._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:donutloader family:remcos botnet:remotehost discovery execution loader persistence rat
Link:
https://tria.ge/reports/260416-cv1zvahw81/
Behaviour
Scheduled Task/Job: Scheduled Task
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
Enumerates processes with tasklist
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Command and Scripting Interpreter: PowerShell
Detects DonutLoader
Family: DonutLoader
Family: Remcos
Malware Config
C2 Extraction:
www.greatnewcorp.com:2404
www.greatnewcorpbackup1.com:2404
www.greatnewcorpbackup2.com:2404
www.greatnewcorpbackup3.com: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/c3900a803dc86d1a56154be75e2d00b686a531cc123603311c185a2b297890b4

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:ClamAV_Emotet_String_Aggregate
Create hunting rule
Rule name:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
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

Java Script (JS) js c3900a803dc86d1a56154be75e2d00b686a531cc123603311c185a2b297890b4

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments