MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 859ffef0278c9c9835db23202f3aa67b69ad1e00a3f326350f613ab701a45ee3. 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: 18

Intelligence 18 IOCs 1 YARA 20 File information Comments

SHA256 hash:	859ffef0278c9c9835db23202f3aa67b69ad1e00a3f326350f613ab701a45ee3
SHA3-384 hash:	cbab8c3f8e2c9e9eae446f513c64152885e0dfa000b007bb4bd836d8b551b7e24de2691965c64d98359fb6d30fd1bc39
SHA1 hash:	9825f7f799d765eac6a9892f278aacead54b23cd
MD5 hash:	6ad6b8e8dad4f6555786a44725800fc0
humanhash:	robin-charlie-network-xray
File name:	9Oi8Y2XXM3SzIv1.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	1'069'056 bytes
First seen:	2025-12-02 06:10:10 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
ssdeep	12288:d60BBCdnT5W/VNf9hZnLtOYU/Wjd7lV+nZJiTk6+Fl5/O0JnCBDoe8wklzEHZq9o:fm94dtUczV67iycWyF3kuHZq91OJ
TLSH	T1E8352221331DE017D46A5EF04862D272277E6DAC9D02E54BDEC83F9F78EA3164A50B93
TrID	56.5% (.EXE) Win64 Executable (generic) (10522/11/4) 11.0% (.ICL) Windows Icons Library (generic) (2059/9) 10.9% (.EXE) OS/2 Executable (generic) (2029/13) 10.7% (.EXE) Generic Win/DOS Executable (2002/3) 10.7% (.EXE) DOS Executable Generic (2000/1)
Magika	pebin
Reporter	abuse_ch
Tags:	exe RAT RemcosRAT

abuse_ch

RemcosRAT C2:
104.37.174.84:7890

Indicators Of Compromise (IOCs)

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

IOC	ThreatFox Reference
104.37.174.84:7890	https://threatfox.abuse.ch/ioc/1665544/

Intelligence

File Origin

# of uploads :

# of downloads :

129

Origin country :

Vendor Threat Intelligence

No detections

Malware family:

remcos

ID:

File name:

9Oi8Y2XXM3SzIv1.exe

Verdict:

Malicious activity

Analysis date:

2025-12-02 06:13:19 UTC

Tags:

remcos rat stealer mpress

Link:

https://app.any.run/tasks/8ab3b097-87cb-46cd-b56c-ef8e7fd079f0

Note:

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

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/42092/

Verdict:

Malicious

Score:

94.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=692e82df264b106bd645d920

Tags:

injection crypted lien remo

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

packed vbnet

Link:

https://www.filescan.io/uploads/692e82dbfb57498b31681b86/reports/bf488ac6-ef73-4b44-afe1-81deffd77630/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/859ffef0278c9c9835db23202f3aa67b69ad1e00a3f326350f613ab701a45ee3

Verdict:

Malicious

File Type:

exe x64

First seen:

2025-12-02T02:16:00Z UTC

Last seen:

2025-12-03T16:03:00Z UTC

Hits:

~100

Detections:

HEUR:Backdoor.MSIL.Remcos.gen Backdoor.Remcos.TCP.C&C Trojan-PSW.Win32.Stealer.sb Trojan-Dropper.Win32.Injector.qcik Trojan.MSIL.Taskun.sb Trojan.MSIL.Crypt.sb Backdoor.Win32.Remcos.sb VHO:Backdoor.Win32.Remcos.gen Trojan-PSW.Win32.Greedy.sb Trojan-Dropper.Win32.Injector.sb PDM:Trojan.Win32.Generic not-a-virus:HEUR:PSWTool.Win32.PassView.b not-a-virus:HEUR:PSWTool.Win32.PassView.a not-a-virus:HEUR:PSWTool.Win32.PassView.c

Link:

https://opentip.kaspersky.com/859ffef0278c9c9835db23202f3aa67b69ad1e00a3f326350f613ab701a45ee3/results?tab=lookup

Malware family:

Agent Tesla

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/b578c6f3-6eba-47a8-be21-af281529644d

Result

Threat name:

Remcos

Detection:

malicious

Classification:

phis.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1824151

Signature

.NET source code contains potential unpacker

Antivirus detection for dropped file

C2 URLs / IPs found in malware configuration

Contains functionality to bypass UAC (CMSTPLUA)

Contains functionality to steal Chrome passwords or cookies

Contains functionality to steal Firefox passwords or cookies

Detected Remcos RAT

Found hidden mapped module (file has been removed from disk)

Found malware configuration

Found stalling execution ending in API Sleep call

Injects a PE file into a foreign processes

Joe Sandbox ML detected suspicious sample

Malicious sample detected (through community Yara rule)

Maps a DLL or memory area into another process

Modifies the context of a thread in another process (thread injection)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Sigma detected: Remcos

Suricata IDS alerts for network traffic

Switches to a custom stack to bypass stack traces

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

Tries to steal Instant Messenger accounts or passwords

Tries to steal Mail credentials (via file / registry access)

Tries to steal Mail credentials (via file registry)

Unusual module load detection (module proxying)

Writes to foreign memory regions

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

94%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/859ffef0278c9c9835db23202f3aa67b69ad1e00a3f326350f613ab701a45ee3

Verdict:

inconclusive

YARA:

5 match(es)

Tags:

.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.44 Win 64 Exe x64

Link:

https://app.malva.re/file/6ad6b8e8dad4f6555786a44725800fc0

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/859ffef0278c9c9835db23202f3aa67b69ad1e00a3f326350f613ab701a45ee3/

Verdict:

Malicious

Threat:

Family.REMCOS

Link:

https://tip.neiki.dev/file/859ffef0278c9c9835db23202f3aa67b69ad1e00a3f326350f613ab701a45ee3

Threat name:

ByteCode-MSIL.Backdoor.Remcos

Status:

Malicious

First seen:

2025-12-02 06:10:38 UTC

File Type:

PE+ (.Net Exe)

Extracted files:

AV detection:

17 of 23 (73.91%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=qwp754bhrsojqno3emqc6ovgpnu22hqaupzsmnipme5loanel3rq._file

Verdict:

malicious

Label(s):

nirsoft

unc_loader_037

remcos

admintool_mailpassview

Similar samples:

error

RemcosRAT

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost collection discovery rat

Link:

https://tria.ge/reports/251202-gxbj7axpes/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Accesses Microsoft Outlook accounts

Detected Nirsoft tools

NirSoft MailPassView

Remcos

Remcos family

Malware Config

C2 Extraction:

104.37.174.84:7890

Verdict:

Suspicious

Tags:

Remcos

YARA:

n/a

Link:

https://app.threat.zone/submission/4f1850c3-5dbe-4323-8274-e78b05fab1f0

Unpacked files

SH256 hash:

859ffef0278c9c9835db23202f3aa67b69ad1e00a3f326350f613ab701a45ee3

MD5 hash:

6ad6b8e8dad4f6555786a44725800fc0

SHA1 hash:

9825f7f799d765eac6a9892f278aacead54b23cd

Link:

https://www.unpac.me/results/f041f5c0-e101-45dc-af7c-8dfc4ced1f4c/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/859ffef0278c/report/overview.html

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

Threat name:

Suspicious File

Score:

0.49

Link:

https://yomi.yoroi.company/submissions/859ffef0278c9c9835db23202f3aa67b69ad1e00a3f326350f613ab701a45ee3

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

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

Rule name:	INDICATOR_EXE_Packed_MPress Create hunting rule
Author:	ditekSHen
Description:	Detects executables built or packed with MPress PE compressor

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:	pe_no_import_table Create hunting rule
Description:	Detect pe file that no import table

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:	TeslaCryptPackedMalware Create hunting rule

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

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_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.

Cape

https://www.capesandbox.com/analysis/42092/

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