MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 413a08efe39bc4eea9841564f4497bf2ab6e5e074d7bf4e7f9be6d80da274e68. 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 18 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 413a08efe39bc4eea9841564f4497bf2ab6e5e074d7bf4e7f9be6d80da274e68
SHA3-384 hash: 6e76b953d96e0d90939df8bdc1ba4e62ebc919b300a1df37ecee22f1ab952592eebd558bca3be1aedd8b7b47dc98e965
SHA1 hash: 4e32eecd66b6c000e7d60d7a1918edbe38c092ed
MD5 hash: cb7123859479f5215f8404d5a7e3ce4f
humanhash: solar-item-river-kilo
File name:Doc 489333.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:5'757'814 bytes
First seen:2025-12-23 10:29:22 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 98304:pdSDSWHoJb5BB9sEsUy43tlziDf8tlXWpOIixwsGdMXl:psmFN5BLTsO3riDfilGfixwBdM1
TLSH T1FE4661156BF01088C1D2D979DA1E1A985C4E7A17A6D76CDB3038BC9B707F8C9B630E36
Magika javascript
Reporter smica83
Tags:js RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
128
Origin country :
HU HU
Vendor Threat Intelligence
No detections
Verdict:
Clean
Score:
89.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=694a6f471f4579575723a941
Tags:
n/a
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug autoit dropper evasive expired-cert fingerprint keylogger obfuscated repaired
Link:
https://www.filescan.io/uploads/694a6f413f8fdbf8e94fd6c5/reports/059ae5e8-4710-4c79-9a9f-2574a2028170/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/413a08efe39bc4eea9841564f4497bf2ab6e5e074d7bf4e7f9be6d80da274e68
Verdict:
Malicious
File Type:
js
First seen:
2025-12-23T05:23:00Z UTC
Last seen:
2025-12-25T00:31:00Z UTC
Hits:
~100
Detections:
HEUR:Trojan.Script.Generic HEUR:Trojan-Dropper.Script.Generic
Link:
https://opentip.kaspersky.com/413a08efe39bc4eea9841564f4497bf2ab6e5e074d7bf4e7f9be6d80da274e68/results?tab=lookup
Result
Threat name:
Remcos, DonutLoader
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1838163
Signature
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates a thread in another existing process (thread injection)
Detected Remcos RAT
Found malware configuration
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
Sigma detected: Execution from Suspicious Folder
Sigma detected: Remcos
Sigma detected: Suspicious Creation with Colorcpl
Sigma detected: Windows Shell/Scripting Application File Write to Suspicious Folder
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
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)
Unusual module load detection (module proxying)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Yara detected DonutLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1838163 Sample: Doc 489333.js Startdate: 23/12/2025 Architecture: WINDOWS Score: 100 26 www.tjxh-internetional.com 2->26 28 geoplugin.net 2->28 40 Suricata IDS alerts for network traffic 2->40 42 Found malware configuration 2->42 44 Malicious sample detected (through community Yara rule) 2->44 46 11 other signatures 2->46 9 wscript.exe 1 4 2->9         started        signatures3 process4 signatures5 54 Windows Scripting host queries suspicious COM object (likely to drop second stage) 9->54 12 NPYVQZQBMNYFCQBPFOUATVYUVBAYCJYYLYZICORAIDBORXGDMBLHPMC.exe 9->12         started        process6 signatures7 56 Writes to foreign memory regions 12->56 58 Allocates memory in foreign processes 12->58 60 Creates a thread in another existing process (thread injection) 12->60 15 colorcpl.exe 4 6 12->15         started        process8 dnsIp9 30 www.tjxh-internetional.com 96.44.159.154, 1212, 49693, 49694 ASN-QUADRANET-GLOBALUS United States 15->30 32 geoplugin.net 178.237.33.50, 49695, 80 ATOM86-ASATOM86NL Netherlands 15->32 34 Detected Remcos RAT 15->34 36 Maps a DLL or memory area into another process 15->36 38 Unusual module load detection (module proxying) 15->38 19 colorcpl.exe 1 15->19         started        22 colorcpl.exe 1 15->22         started        24 colorcpl.exe 2 15->24         started        signatures10 process11 signatures12 48 Tries to steal Instant Messenger accounts or passwords 19->48 50 Tries to steal Mail credentials (via file / registry access) 19->50 52 Tries to harvest and steal browser information (history, passwords, etc) 22->52
Gathering data
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/413a08efe39bc4eea9841564f4497bf2ab6e5e074d7bf4e7f9be6d80da274e68/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/413a08efe39bc4eea9841564f4497bf2ab6e5e074d7bf4e7f9be6d80da274e68
Threat name:
Binary.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-12-23 08:56:02 UTC
File Type:
Binary
AV detection:
3 of 24 (12.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ie5ar37dtpco5kmecvspisl36kvw4xqhjv57jz7zxzwybwrhjzua._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
error
RemcosRAT
Result
Malware family:
donutloader
Create hunting rule
Score:
  10/10
Tags:
family:donutloader collection discovery execution loader
Link:
https://tria.ge/reports/251223-nn4b6svrat/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
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
Checks computer location settings
Executes dropped EXE
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Detects DonutLoader
DonutLoader
Donutloader family
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.60
Link:
https://yomi.yoroi.company/submissions/413a08efe39bc4eea9841564f4497bf2ab6e5e074d7bf4e7f9be6d80da274e68

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: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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Trojan_Remcos_b296e965
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research

File information

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

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