MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 39848daa941906b33b0a28e969b56b76a0f802e5b55f8a2aa53d8455e7ff2cd9. 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: 20

Intelligence 20 IOCs YARA 14 File information Comments

SHA256 hash:	39848daa941906b33b0a28e969b56b76a0f802e5b55f8a2aa53d8455e7ff2cd9
SHA3-384 hash:	dde5833dd48429475c5d89e83aa3ee57a21bcb2dd473ba67d2140079fd6137c452d52b9565a1672598ecfe966e9c42de
SHA1 hash:	aaece89319948d57a603382535b2724346b8176c
MD5 hash:	87168e22f4269cfff666a0146a0ba067
humanhash:	ohio-delaware-william-one
File name:	Backdoor.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	98'304 bytes
First seen:	2026-05-21 16:03:38 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	d3a62971944197f0701c7049a9c739d1 (76 x RemcosRAT)
ssdeep	1536:QhhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6xr1:2hzYTGWVvJ8f2v1TbPzuMsIFSHNThy+o
TLSH	T18FA3C717B94BD0B3E42591F186826BA18FBC7C333646213BD74FC9419DB8486D452EFA
TrID	40.8% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 21.6% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 8.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 8.5% (.EXE) Win64 Executable (generic) (6522/11/2) 6.5% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika	pebin
dhash icon	989894b49c9494f0 (61 x RemcosRAT)
Reporter	bomaylaliaw
Tags:	exe RAT remcos RemcosRAT

bomaylaliaw

Observed malicious infrastructure associated with this Remcos RAT sample:

c2.u888ny.com — 7/91 detections — Registrar: Spaceship
j88jh.com — 13/91 detections
j88pro.club — 15/91 detections — Registrar: GoDaddy
j88t2.org — 17/91 detections
u88.vc — 6/91 detections
u888.fishing — 8/91 detections
u888com.biz — 18/91 detections — Registrar: Namecheap
u888lm.com — 18/91 detections — Registrar: Namecheap
u888np.com — 16/91 detections — Registrar: Namecheap
u888ny.com — 17/91 detections — Registrar: Spaceship
u88team3.com — linked in malware relations
vn88.co.com — 3/91 detections — Registrar: Moniker Online Services

The domains were identified through VirusTotal Relations analysis and appear linked to malware delivery and/or command-and-control infrastructure related to Remcos RAT activity.

Intelligence

File Origin

# of uploads :

# of downloads :

274

Origin country :

Vendor Threat Intelligence

Malware configuration found for:

Remcos

Details

Remcos

a version number and verbose configuration settings

Link:

https://research.acce.ciphertechsolutions.com/results/53218ef2-5c9f-4d9f-b3e0-18c98f23db3c/

Malware family:

remcos

ID:

File name:

Backdoor.exe

Verdict:

Malicious activity

Analysis date:

2026-05-21 16:02:05 UTC

Tags:

rat remcos

Link:

https://app.any.run/tasks/89c58eda-ec51-4d2a-9241-4cb62123c18b

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection:

Remcos

Link:

https://www.capesandbox.com/analysis/67451/

Detection(s):

Win.Malware.Azden-7587127-0

Win.Malware.Rescoms-6598304-0

Win.Malware.Zusy-6832224-0

YARA.MALPEDIA_Win_Remcos_Auto.UNOFFICIAL

YARA.SEKOIA_Rat_Win_Remcos.UNOFFICIAL

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6a0f2d5533e785de369c82cc

Tags:

remcos emotet

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

Creating a file

Creating a window

Connection attempt to an infection source

Sending a TCP request to an infection source

Query of malicious DNS domain

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-debug anti-vm cmd config-extracted crypto evasive evasive eventvwr explorer fingerprint keylogger lolbin microsoft_visual_cc obfuscated rat rat reconnaissance remcos

Link:

https://www.filescan.io/uploads/6a0f2d11efbd399b39c3cb7d/reports/cb77b1b9-50b9-4ea6-aa1b-c004dec4275d/overview

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/39848daa941906b33b0a28e969b56b76a0f802e5b55f8a2aa53d8455e7ff2cd9

Verdict:

Malicious

File Type:

exe x32

First seen:

2026-05-21T13:28:00Z UTC

Last seen:

2026-05-21T20:39:00Z UTC

Hits:

~10

Detections:

Backdoor.Win32.Remcos.f HEUR:Trojan.Win32.Generic HEUR:Trojan.Win32.Agent.gen Exploit.Win32.BypassUAC.sb Backdoor.Win32.Remcos.sb

Link:

https://opentip.kaspersky.com/39848daa941906b33b0a28e969b56b76a0f802e5b55f8a2aa53d8455e7ff2cd9/results?tab=lookup

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/0b1ee478-706e-4c9a-b794-d07b1bdece88

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/39848daa941906b33b0a28e969b56b76a0f802e5b55f8a2aa53d8455e7ff2cd9

Gathering data

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/39848daa941906b33b0a28e969b56b76a0f802e5b55f8a2aa53d8455e7ff2cd9/

Verdict:

Malicious

Threat:

Family.REMCOS

Link:

https://tip.neiki.dev/file/39848daa941906b33b0a28e969b56b76a0f802e5b55f8a2aa53d8455e7ff2cd9

Threat name:

Win32.Backdoor.Remcos

Status:

Malicious

First seen:

2026-05-21 16:05:50 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

36 of 37 (97.30%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=hgci3kuudedlgoykfduwtnllo2qpqaxfwvpyukvfhwcflz77ftmq._file

Verdict:

malicious

Label(s):

remcos

Similar samples:

error

RemcosRAT

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:host discovery rat

Link:

https://tria.ge/reports/260521-th7qash14q/

Behaviour

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

System Location Discovery: System Language Discovery

Unexpected DNS network traffic destination

Malware Config

C2 Extraction:

u888ny.com:443
u888ny.com:80
u888ny.com:22
u888ny.com:53
c2.u888ny.com:443
vn88.co.com:443
u88.vc:443
u888.fishing:443
u88team3.com:443
j88jh.com:443
j88t2.org:443
j88pro.club:443
u888com.biz:443
u888np.com:443
u888lm.com:443

Unpacked files

SH256 hash:

39848daa941906b33b0a28e969b56b76a0f802e5b55f8a2aa53d8455e7ff2cd9

MD5 hash:

87168e22f4269cfff666a0146a0ba067

SHA1 hash:

aaece89319948d57a603382535b2724346b8176c

Detections:

win_remcos_auto

win_remcos_g0

Remcos

Link:

https://www.unpac.me/results/7a0c3e32-69f1-4cf1-9510-35c4ab1752ca/

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Remcos

Score:

0.90

Link:

https://yomi.yoroi.company/submissions/39848daa941906b33b0a28e969b56b76a0f802e5b55f8a2aa53d8455e7ff2cd9

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:	CMD_Ping_Localhost Create hunting rule

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:	FreddyBearDropper Create hunting rule
Author:	Dwarozh Hoshiar
Description:	Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.

Rule name:	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer Create hunting rule
Author:	ditekSHen
Description:	detects Windows exceutables potentially bypassing UAC using eventvwr.exe

Rule name:	malware_Remcos_strings Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect Remcos in memory

Rule name:	RAT_remcos_strings Create hunting rule
Author:	0x0d4y
Description:	This rule detects the remcos through your specific strings.
Reference:	Internal Research

Rule name:	Remcos Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect Remcos in memory

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

Rule name:	remcos_rat Create hunting rule
Author:	jeFF0Falltrades

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:	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_Generic_Threat_994f2330 Create hunting rule
Author:	Elastic Security

Rule name:	win_remcos_auto Create hunting rule
Author:	Felix Bilstein - yara-signator at cocacoding dot com
Description:	Detects win.remcos.

File information

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

any.run

https://app.any.run/tasks/89c58eda-ec51-4d2a-9241-4cb62123c18b

Delivery method

Other

Cape

https://www.capesandbox.com/analysis/67451/

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