MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c7daba3e91e5cd3ea747f1aeb9af5b211a0b6a7a3be525937e1886447ad0f4e0. 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: 15

Intelligence 15 IOCs 1 YARA 34 File information Comments

SHA256 hash:	c7daba3e91e5cd3ea747f1aeb9af5b211a0b6a7a3be525937e1886447ad0f4e0
SHA3-384 hash:	e8a7177547f93e32f8c3779d8d39decc49aeb66b5992523d3523060321b476b25049361f3b449240c588571b4d61367f
SHA1 hash:	da4cc7f99b5984563fdff80b8013f0792ab3f96c
MD5 hash:	3cacbefe2cfe0cdc44168cc3a71982b8
humanhash:	california-stairway-jersey-bravo
File name:	zfzlxxeu.JS.js
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	4'971'218 bytes
First seen:	2026-11-05 07:20:13 UTC
Last seen:	Never
File type:	js
MIME type:	text/plain
ssdeep	98304:9F3Jq2t40q8l/EtblPUfeurssUsBDKsESzD6wtAG9Pmyj3TFAzTR8lvKwUIl9OWm:9t0x8l/Etbx4euYruDK+zOeDnjkdwrlM
TLSH	T1B236F6412F8FB1327721AB9C963AC838954A60C315D6CB3D316DF218F65CC1BA758BE2
Magika	javascript
Reporter	abuse_ch
Tags:	js RAT RemcosRAT

abuse_ch

RemcosRAT C2:
196.251.102.41:6060

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOC	ThreatFox Reference
196.251.102.41:6060	https://threatfox.abuse.ch/ioc/2015572/

Intelligence

File Origin

# of uploads :

# of downloads :

194

Origin country :

Vendor Threat Intelligence

No detections

Detection(s):

Sanesecurity.Malware.25834.JsHeur.UNOFFICIAL

Verdict:

Malicious

Score:

94.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6aec2e3a62f3df3e73e2a2c8

Tags:

autorun proxy java

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Running batch commands

Creating a process with a hidden window

Changing the Zone.Identifier stream

Creating a file

Creating synchronization primitives

Setting a keyboard event handler

Connection attempt to an infection source

Sending a custom TCP request

DNS request

Connection attempt

Creating a process from a recently created file

Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch

Query of malicious DNS domain

Verdict:

Suspicious

Labled as:

JS/Agent.ECX4

Link:

https://www.hybrid-analysis.com/sample/c7daba3e91e5cd3ea747f1aeb9af5b211a0b6a7a3be525937e1886447ad0f4e0

Verdict:

Malicious

File Type:

First seen:

2026-11-05T04:15:00Z UTC

Last seen:

2026-11-05T05:35:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/c7daba3e91e5cd3ea747f1aeb9af5b211a0b6a7a3be525937e1886447ad0f4e0/results?tab=lookup

Result

Threat name:

Remcos, DonutLoader

Detection:

malicious

Classification:

troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1998788

Signature

Antivirus detection for URL or domain

Benign windows process drops PE files

C2 URLs / IPs found in malware configuration

Creates autostart registry keys with suspicious values (likely registry only malware)

Detected Remcos RAT

Drops PE files to the document folder of the user

Executes Lua script

Found API chain indicative of debugger detection

Found direct / indirect Syscall (likely to bypass EDR)

Found malware configuration

Installs a global keyboard hook

JavaScript source code contains functionality to generate code involving a shell, file or stream

Malicious sample detected (through community Yara rule)

Sigma detected: Remcos

Sigma detected: WScript or CScript Dropper

Suricata IDS alerts for network traffic

Unusual module load detection (module proxying)

Uses dynamic DNS services

Windows Scripting host queries suspicious COM object (likely to drop second stage)

WScript reads language and country specific registry keys (likely country aware script)

Yara detected DonutLoader

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Verdict:

Malware

YARA:

2 match(es)

Tags:

Batch Command DeObfuscated Javascript JS Emulation Trace PowerShell PowerShell Call Scripting.FileSystemObject T1027 T1059.001 T1059.007 WScript.Shell

Link:

https://app.malva.re/file/3cacbefe2cfe0cdc44168cc3a71982b8

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/c7daba3e91e5cd3ea747f1aeb9af5b211a0b6a7a3be525937e1886447ad0f4e0/

Threat name:

Script-JS.Trojan.AgentTesla

Status:

Malicious

First seen:

2026-11-05 07:21:15 UTC

File Type:

Binary

AV detection:

10 of 24 (41.67%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=y7nlupur4xgt5j2h6gxltl23eenaw2t2hpssle36dcdei6wq6tqa._file

Verdict:

malicious

Label(s):

DonutLoader

Remcos

Link:

https://reports.threatray.com/4f8077b2-2c26-4c94-9674-60a9d55bf911

Result

Malware family:

remcos

Score:

10/10

Tags:

family:donutloader family:remcos botnet:remotehost discovery execution loader persistence rat suricata

Link:

https://tria.ge/reports/261105-h57g9sgw9x/

Behaviour

Modifies registry class

NTFS ADS

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Command and Scripting Interpreter: JavaScript

Enumerates physical storage devices

Executes a command shell one-liner

Reads the TCP/IP host and domain name from the registry

Executes a VBScript file via the Windows Script Host.

Adds Run key to start application

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Detects DonutLoader

Family: DonutLoader

Family: Remcos

Suricata alert: REMCOS RAT Malware Inbound C2 Communication

Suricata alert: REMCOS RAT Malware Outbound C2 Communication

Malware Config

C2 Extraction:

google-com-site-backup.duckdns.org:4440
codingoffensive.duckdns.org:5656
google-com-site.duckdns.org:6060
reboot.duckdns.org:6060
reboot.duckdns.org:2404
reboot.duckdns.org:4440

Malware Family:

ecx4

Malicious:

True

Tags:

javascript

Link:

https://intel.virussign.com/intelligence/file/c7daba3e91e5cd3ea747f1aeb9af5b211a0b6a7a3be525937e1886447ad0f4e0

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/c7daba3e91e5cd3ea747f1aeb9af5b211a0b6a7a3be525937e1886447ad0f4e0

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:	cobalt_strike_tmp01925d3f Create hunting rule
Author:	The DFIR Report
Description:	files - file ~tmp01925d3f.exe
Reference:	https://thedfirreport.com

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:	Disable_Defender Create hunting rule
Author:	iam-py-test
Description:	Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen

Rule name:	exploit_any_poppopret Create hunting rule
Author:	Jeff White [karttoon@gmail.com] @noottrak
Description:	Identify POP -> POP -> RET opcodes for quick ROP Gadget creation in target binaries.

Rule name:	golang_bin_JCorn_CSC846 Create hunting rule
Author:	Justin Cornwell
Description:	CSC-846 Golang detection ruleset

Rule name:	INDICATOR_SUSPICIOUS_Binary_References_Browsers Create hunting rule
Author:	ditekSHen
Description:	Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

Rule name:	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM Create hunting rule
Author:	ditekSHen
Description:	Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

Rule name:	MULTI_Malware_AgentTesla_ForgeAuto_ed343f78_Extrait Create hunting rule
Author:	Marjoriefort
Description:	Detects AgentTesla (inconnu, etat extrait)

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:	REMCOS_RAT_variants Create hunting rule

Rule name:	Remcos_unpacked_PulseIntel Create hunting rule
Author:	PulseIntel
Description:	Remcos Payload

Rule name:	SUSP_Script_PowerShell_Hidden_Launcher Create hunting rule
Author:	Marjoriefort
Description:	Script (JS/VBS) lancant PowerShell en mode furtif - dropper frais MalwareBazaar
Reference:	Veille fraicheur 2026-09-14 / cluster misses web

Rule name:	Sus_CMD_Powershell_Usage Create hunting rule
Author:	XiAnzheng
Description:	May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

Rule name:	ThreadControl__Context Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	TigerRAT_pe_yaraify Create hunting rule
Author:	hunts-yara-code
Description:	YARAify-tightened byte rule from 9 sample(s) -- VERIFY hits

Rule name:	VECT_Ransomware Create hunting rule
Author:	Mustafa Bakhit
Description:	Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

Rule name:	VIGIA_RemcosRAT_12bf67c7 Create hunting rule
Author:	VIG-IA - Cognitive Threat Intelligence System for Smart Territories and Tourism Sector
Description:	4ecda9dd-c048-413e-8ff4-2532f2e4d6eb - RemcosRAT family and corroborated behavioral indicators
Reference:	https://vigia.bisite.es/

Rule name:	VIGIA_RemcosRAT_3ca3d51f Create hunting rule
Author:	VIG-IA - Cognitive Threat Intelligence System for Smart Territories and Tourism Sector
Description:	b36f2418-9ab3-419b-8c15-e3b00eacabeb - RemcosRAT indicators and original NSIS-packaged sample
Reference:	https://vigia.bisite.es/

Rule name:	VIGIA_RemcosRAT_614e3ab4 Create hunting rule
Author:	VIG-IA - Cognitive Threat Intelligence System for Smart Territories and Tourism Sector
Description:	RemcosRAT configuration and corroborated diagnostic indicators
Reference:	https://vigia.bisite.es/

Rule name:	VIGIA_RemcosRAT_8ac92158 Create hunting rule
Author:	VIG-IA - Cognitive Threat Intelligence System for Smart Territories and Tourism Sector
Description:	RemcosRAT indicators with corroborated keylogging, credential-access, and scripted execution behavior
Reference:	https://vigia.bisite.es/

Rule name:	VIGIA_RemcosRAT_be11e16d Create hunting rule
Author:	VIG-IA - Cognitive Threat Intelligence System for Smart Territories and Tourism Sector
Description:	c0de03d4-e1e8-4c08-a5f7-4c330428829f - RemcosRAT activity messages and correlated behaviors
Reference:	https://vigia.bisite.es/

Rule name:	VIGIA_RemcosRAT_ff27f58a Create hunting rule
Author:	VIG-IA - Cognitive Threat Intelligence System for Smart Territories and Tourism Sector
Description:	b4b5dbd4-831c-469c-936d-1597b391378e - RemcosRAT diagnostic strings and corroborated behaviors
Reference:	https://vigia.bisite.es/

Rule name:	Windows_Trojan_Remcos_921ef449 Create hunting rule
Author:	Elastic Security

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_Clipboard_Clipper_Thengavar Create hunting rule
Author:	Thengavar
Description:	Detects malware manipulating the Windows clipboard for clipping or crypto stealing attacks

Rule name:	WIN_Malware_Unknown_ForgeAuto_2ffc3572 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_74566f98 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_79234c04 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

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.

No further information available

Comments

Login required

You need to login to in order to write a comment. Login with your abuse.ch account.

No comments found for this malware sample