MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 00a21e0dc95950492c26e4c3edcc2f537895e76af5961a08a05ba0b4694d9ea8. 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 24 File information Comments

SHA256 hash:	00a21e0dc95950492c26e4c3edcc2f537895e76af5961a08a05ba0b4694d9ea8
SHA3-384 hash:	9695a6b31c37ffb47bbcf11b6ec47a484f890bb75554ce342a6d7391e861de008bbcda2fe549f2f1d474b679ac29127d
SHA1 hash:	3c7e379e43ad8ecd7485bef7102cd804c615488e
MD5 hash:	af36c15603d5e7432c251280a3df04da
humanhash:	east-kentucky-bakerloo-yellow
File name:	Invoice_796550.js
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	5'119'825 bytes
First seen:	2026-08-27 14:19:32 UTC
Last seen:	Never
File type:	js
MIME type:	text/plain
ssdeep	49152:llr0SmTH8ZAvpxHPKQRDQFvJDSIaGZaIUD3vRahwdM1Zy1glHe:c
TLSH	T15E36C7A36A9F3A069D6D7753915EACA94FB2D1550FC3ACD0B0DF0980100BC8B69C5DBB
Magika	javascript
Reporter	abuse_ch
Tags:	js RAT RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

169

Origin country :

Vendor Threat Intelligence

No detections

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

masquerade obfuscated repaired

Link:

https://www.filescan.io/uploads/6a9047a362985001bdbc1d58/reports/323b6323-f9ac-4c8b-8526-fea82dd2a7ae/overview

Verdict:

Malicious

Labled as:

Trojan/JS.Obfuscated

Link:

https://www.hybrid-analysis.com/sample/00a21e0dc95950492c26e4c3edcc2f537895e76af5961a08a05ba0b4694d9ea8

Verdict:

Malicious

File Type:

First seen:

2026-08-27T06:03:00Z UTC

Last seen:

2026-08-29T00:43:00Z UTC

Hits:

~100

Link:

https://opentip.kaspersky.com/00a21e0dc95950492c26e4c3edcc2f537895e76af5961a08a05ba0b4694d9ea8/results?tab=lookup

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1964818

Signature

Attempt to bypass Chrome Application-Bound Encryption

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 functionalty to change the wallpaper

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

Detected Remcos RAT

Found evasive API chain checking for user administrative privileges

Found malware configuration

Found stalling execution ending in API Sleep call

Found suspicious powershell code related to unpacking or dynamic code loading

Injects a PE file into a foreign processes

Installs a global keyboard hook

JavaScript file contains suspicious strings

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

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Sigma detected: New RUN Key Pointing to Suspicious Folder

Sigma detected: Potential Data Stealing Via Chromium Headless Debugging

Sigma detected: Remcos

Sigma detected: WScript or CScript Dropper

Suspicious execution chain found

Suspicious powershell command line found

Tries to harvest and steal browser information (history, passwords, etc)

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 Powershell decode and execute

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

99%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/00a21e0dc95950492c26e4c3edcc2f537895e76af5961a08a05ba0b4694d9ea8

Gathering data

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/00a21e0dc95950492c26e4c3edcc2f537895e76af5961a08a05ba0b4694d9ea8/

Threat name:

Script-JS.Backdoor.Remcos

Status:

Malicious

First seen:

2026-08-27 12:28:57 UTC

File Type:

Text (JavaScript)

AV detection:

12 of 37 (32.43%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=acrb4dojlfieslbg4tb63tbpkn4jlz3k6wlbucfaloqli2knt2ua._file

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost collection credential_access defense_evasion discovery execution persistence privilege_escalation rat stealer trojan

Link:

https://tria.ge/reports/260827-rnk3davwcx/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies data under HKEY_USERS

Modifies registry class

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

outlook_office_path

Browser Information Discovery

Command and Scripting Interpreter: JavaScript

Enumerates physical storage devices

System Location Discovery: System Language Discovery

System Time Discovery

Drops file in Program Files directory

Drops file in Windows directory

Suspicious use of SetThreadContext

Accesses Microsoft Outlook profiles

Adds Run key to start application

Creates a file in the Startup directory

Loads dropped DLL

Command and Scripting Interpreter: PowerShell

Uses browser remote debugging

Family: Remcos

UAC bypass

Malware Config

C2 Extraction:

207.180.29.85:2404

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/00a21e0dc95950492c26e4c3edcc2f537895e76af5961a08a05ba0b4694d9ea8

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:	Base64_Encoded_Powershell_Directives Create hunting rule

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:	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:	NET Create hunting rule
Author:	malware-lu

Rule name:	pe_detect_tls_callbacks Create hunting rule

Rule name:	Remcos Create hunting rule
Author:	kevoreilly
Description:	Remcos Payload

Rule name:	REMCOS_RAT_variants Create hunting rule

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

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:	TH_AntiVM_MassHunt_Win_Malware_2026_CYFARE Create hunting rule
Author:	CYFARE
Description:	Detects Windows malware employing anti-VM / anti-sandbox evasion techniques across VMware, VirtualBox, Hyper-V, QEMU, Xen, and generic sandbox environments
Reference:	https://cyfare.net/

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:	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_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.

No further information available

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