MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 aa8a01231f8e9e77f4efe59d0c73fb6689336d4e6b061908d9e99e3f03ff2e72. 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: 10

Intelligence 10 IOCs 1 YARA 34 File information Comments

SHA256 hash:	aa8a01231f8e9e77f4efe59d0c73fb6689336d4e6b061908d9e99e3f03ff2e72
SHA3-384 hash:	3a038e67ce083af5402783b5b977bc34a5d45c625edfd6047348ff1a7bfe1fad960df06b1751d8a49c9a44b8b515b63c
SHA1 hash:	4b4c734806b6961d531e81009191f7e622df6624
MD5 hash:	748704b5ce8121b4aa8da2825e5da32b
humanhash:	lion-maine-uncle-delaware
File name:	NewPO0010072026SpecificationsRequirements.JS.js
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	4'322'768 bytes
First seen:	2026-10-07 08:15:06 UTC
Last seen:	Never
File type:	js
MIME type:	application/javascript
ssdeep	98304:gZcoOMsdJ/jJAxcUySmvD37MwlHMd2kyWxKeLNB3lfLl+WDur7QBhRswXgo1UK7D:WrOrz1A0LMwlH62C1J+WC67fX5LsQpX
TLSH	T19F1618790348A630A66D5B2CC136AA6116E9301B72E5EF3E35F872447365B1F338F4DA
Magika	txt
Reporter	abuse_ch
Tags:	js RAT RemcosRAT

abuse_ch

RemcosRAT C2:
172.111.137.68:65070

Indicators Of Compromise (IOCs)

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

IOC	ThreatFox Reference
172.111.137.68:65070	https://threatfox.abuse.ch/ioc/1954598/

Intelligence

File Origin

# of uploads :

# of downloads :

190

Origin country :

Vendor Threat Intelligence

No detections

Detection(s):

SecuriteInfo.com.Other.Malware-gen.45779211.UNOFFICIAL

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-debug dropper evasive obfuscated obfuscated packed repaired

Link:

https://www.filescan.io/uploads/6ac5ffa6dc545217a1a46c20/reports/ded8758e-eaa1-4c71-acde-1baa85e24a74/overview

Verdict:

Malicious

Labled as:

GT:JS.JS.Downloader.4

Link:

https://www.hybrid-analysis.com/sample/aa8a01231f8e9e77f4efe59d0c73fb6689336d4e6b061908d9e99e3f03ff2e72

Verdict:

Malicious

File Type:

First seen:

2026-10-07T01:24:00Z UTC

Last seen:

2026-10-08T06:03:00Z UTC

Hits:

~1000

Link:

https://opentip.kaspersky.com/aa8a01231f8e9e77f4efe59d0c73fb6689336d4e6b061908d9e99e3f03ff2e72/results?tab=lookup

Result

Threat name:

DonutLoader, Remcos

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1983420

Signature

Antivirus detection for URL or domain

Benign windows process drops PE files

C2 URLs / IPs found in malware configuration

Drops PE files to the document folder of the user

Found malware configuration

Hides threads from debuggers

JavaScript source code contains call to eval() to check own source code (likely for evading instrumentation)

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: 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 Lua decrypt and execute

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Gathering data

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/aa8a01231f8e9e77f4efe59d0c73fb6689336d4e6b061908d9e99e3f03ff2e72/

Threat name:

Script-JS.Trojan.Generic

Status:

Suspicious

First seen:

2026-10-07 07:49:09 UTC

File Type:

Binary

AV detection:

7 of 36 (19.44%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=vkfaciy7r2php5hp4woqy473m2etg3konmdbscgz5gpd6a77fzza._file

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos defense_evasion discovery execution rat suricata

Link:

https://tria.ge/reports/261007-j5svjsvwcz/

Behaviour

Modifies registry class

Suspicious use of WriteProcessMemory

Command and Scripting Interpreter: JavaScript

Enumerates physical storage devices

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

System Location Discovery: System Language Discovery

Suspicious use of NtSetInformationThreadHideFromDebugger

Checks computer location settings

Executes dropped EXE

Family: Remcos

Suricata alert: REMCOS RAT Malware Inbound C2 Communication

Suricata alert: REMCOS RAT Malware Outbound C2 Communication

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/aa8a01231f8e9e77f4efe59d0c73fb6689336d4e6b061908d9e99e3f03ff2e72

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:	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 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:	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:	SUSP_VBS_Randomized_ActiveX_Downloader Create hunting rule
Author:	Marjoriefort
Description:	Dropper VBS obfusque : ActiveXObject a identifiant randomise (20 MAJ), SaveToFile, .Run
Reference:	Veille fraicheur 2026-09-14 / grappe VBS randomisee

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:	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_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_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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