MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 791dcaf139ddd6ce9ade8f6eda9c97995b87d3dc35da747d9c3bf96ba6a8b7e3. 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: 9

Intelligence 9 IOCs 1 YARA 31 File information Comments

SHA256 hash:	791dcaf139ddd6ce9ade8f6eda9c97995b87d3dc35da747d9c3bf96ba6a8b7e3
SHA3-384 hash:	7007ef6b499b3708d33bb7cb9e943e4d6c8ff27b593c12e0415390b610c54cbdddf681ed93c9edc3318fdd051cb8a9d3
SHA1 hash:	b4d65b607f2b2d2cb1fa41b34e5affc8f9f09259
MD5 hash:	a7fd238d404c5cf687c1b772f959ca9d
humanhash:	oklahoma-victor-double-kansas
File name:	PO.rar
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	2'127'818 bytes
First seen:	2026-10-21 21:20:05 UTC
Last seen:	2026-10-21 21:22:06 UTC
File type:	rar
MIME type:	application/vnd.rar
ssdeep	49152:D0zsHd2pVv/Zs8/ic0j8xoPBqDFIh89kAkVpVyEy6NRNpYG3ee:AzsHd2zRcJBqKAWpVpnFd
TLSH	T14FA533607FE64C5F4DBF884E6D43BD01825774446CAAFE76BD02BAD7680C1A728C921B
TrID	61.5% (.RAR) RAR compressed archive (v5.0) (8000/1) 38.4% (.RAR) RAR compressed archive (gen) (5000/1)
Magika	rar
Reporter	TomU
Tags:	rar RemcosRAT

Indicators Of Compromise (IOCs)

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

IOC	ThreatFox Reference
31.56.209.182:2020	https://threatfox.abuse.ch/ioc/1966873/

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:	PO.JS
File size:	5'369'973 bytes
SHA256 hash:	4cd3529fc035c278beb7474fd6e78aa6316bc908e105f8e12bb6ab0e79a2bc55
MD5 hash:	402b5246f1b6a941a2bd105dcf83bcf3
MIME type:	text/plain
Signature	RemcosRAT

Vendor Threat Intelligence

Details

Link:

https://research.acce.ciphertechsolutions.com/results/9ae5892d-6c82-4537-a821-5f30e2ac4138/

Detection(s):

SecuriteInfo.com.Other.Malware-gen.54726312.UNOFFICIAL

Verdict:

Malicious

Score:

97.4%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6ad19a256f551121ba16730b

Tags:

autorun cobalt

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-debug dropper evasive obfuscated obfuscated packed repaired

Link:

https://www.filescan.io/uploads/6ad92c97ef1103f97086bae4/reports/19d3cd0a-ae57-4bb9-a851-fd3dd3c491c1/overview

Verdict:

Unknown

Link:

https://www.hybrid-analysis.com/sample/791dcaf139ddd6ce9ade8f6eda9c97995b87d3dc35da747d9c3bf96ba6a8b7e3

Verdict:

Malicious

File Type:

rar

First seen:

2026-10-15T12:06:00Z UTC

Last seen:

2026-10-21T12:16:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/791dcaf139ddd6ce9ade8f6eda9c97995b87d3dc35da747d9c3bf96ba6a8b7e3/results?tab=lookup

Verdict:

inconclusive

YARA:

1 match(es)

Tags:

Rar Archive

Link:

https://app.malva.re/file/a7fd238d404c5cf687c1b772f959ca9d

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/791dcaf139ddd6ce9ade8f6eda9c97995b87d3dc35da747d9c3bf96ba6a8b7e3/

Threat name:

Script.Trojan.Multiverze

Status:

Malicious

First seen:

2026-10-15 12:45:00 UTC

File Type:

Binary (Archive)

Extracted files:

AV detection:

11 of 36 (30.56%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=peo4v4jz3xlm5gw6r5xnvhextfnypu64gxnhi7m4hp4wxjviw7rq._file

Result

Malware family:

remcos

Score:

10/10

Tags:

family:donutloader family:remcos botnet:ekwutos collection discovery execution loader persistence rat spyware stealer suricata

Link:

https://tria.ge/reports/261022-bbnpqsy17j/

Behaviour

Modifies registry class

NTFS ADS

Scheduled Task/Job: Scheduled Task

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

outlook_office_path

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

Accesses Microsoft Outlook profiles

Checks installed software on the system

Checks computer location settings

Executes dropped EXE

Reads user/profile data of web browsers

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:

vuacas.com:2020

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/791dcaf139ddd6ce9ade8f6eda9c97995b87d3dc35da747d9c3bf96ba6a8b7e3

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:	RANSOMWARE Create hunting rule
Author:	ToroGuitar

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:	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_43faefd2 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_5001c94c 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_Malware_Unknown_ForgeAuto_f1079127 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.

Malspam

RemcosRAT

rar 791dcaf139ddd6ce9ade8f6eda9c97995b87d3dc35da747d9c3bf96ba6a8b7e3

(this sample)

Delivery method

Distributed via e-mail attachment

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