MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b6796a4d9dcedda326af341ca3db33412d59ff54c7a2d50f728bd20c57067e4e. 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: 17

Intelligence 17 IOCs YARA 20 File information Comments

SHA256 hash:	b6796a4d9dcedda326af341ca3db33412d59ff54c7a2d50f728bd20c57067e4e
SHA3-384 hash:	57a6dc720b1eefcdfa963a3f384941c18170de662682955c64a9a85ff94ad7f195dc5c7d22c1603121c7f94cbfa6ee43
SHA1 hash:	bd7208372a69687220ac84be754ed0fc26ce60f7
MD5 hash:	0f50b913e0dd78241cf88d046e7e59ff
humanhash:	sierra-papa-hydrogen-fish
File name:	INVOICE_ICNR001419680.PDF.pif
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	60'416 bytes
First seen:	2025-06-02 06:55:56 UTC
Last seen:	2025-06-02 06:56:28 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'750 x AgentTesla, 19'654 x Formbook, 12'248 x SnakeKeylogger)
ssdeep	1536:15LLUn2hKVw8Qn/4UvT5pJ6PyKOk4H5ZSXURNR:E2hKVw55pCX4H5ZSkRNR
Threatray	3'209 similar samples on MalwareBazaar
TLSH	T1DE43D707B69A96B0C2545736D8EB45100FB5E5C2FA53D70E3D8A231A1C43BBABD4B34B
TrID	71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.2% (.EXE) Win64 Executable (generic) (10522/11/4) 6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.3% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika	pebin
Reporter	Anonymous
Tags:	exe RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

425

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

INVOICE_ICNR001419682.PDF.pif

Verdict:

Malicious activity

Analysis date:

2025-06-02 05:37:32 UTC

Tags:

ipfs phishing massbass remcos rat

Link:

https://app.any.run/tasks/5db82817-c45b-423c-82d9-fd7ed4b030ed

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/6810/

Detection(s):

SecuriteInfo.com.Win32.MalwareX-gen.6573.27775.UNOFFICIAL

Verdict:

Malicious

Score:

90.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=683d4cfcacf88f5815eb18b3

Tags:

autorun spawn

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

DNS request

Connection attempt

Sending a custom TCP request

Creating a file in the %AppData% directory

Launching a process

Creating a file

Enabling autorun by creating a file

Unauthorized injection to a system process

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

base64 masquerade net_reactor obfuscated packed

Link:

https://www.filescan.io/uploads/683d4b18fd02ed5e05931276/reports/71f63d63-7f88-4db4-9f50-ffec9ebc76c9/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_90%

Link:

https://www.hybrid-analysis.com/sample/b6796a4d9dcedda326af341ca3db33412d59ff54c7a2d50f728bd20c57067e4e

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/a92cfc7a-7a4e-4ec0-9139-5bc209e5f105

Result

Threat name:

Remcos, ResolverRAT

Detection:

malicious

Classification:

rans.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1703723

Signature

.NET source code contains potential unpacker

C2 URLs / IPs found in malware configuration

Connects to many ports of the same IP (likely port scanning)

Contains functionality to bypass UAC (CMSTPLUA)

Contains functionality to register a low level keyboard hook

Contains functionality to steal Chrome passwords or cookies

Contains functionality to steal Firefox passwords or cookies

Contains functionalty to change the wallpaper

Detected Remcos RAT

Drops VBS files to the startup folder

Found malware configuration

Initial sample is a PE file and has a suspicious name

Injects a PE file into a foreign processes

Installs a global keyboard hook

Joe Sandbox ML detected suspicious sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Queries the IP of a very long domain name

Sample has a suspicious name (potential lure to open the executable)

Sigma detected: Drops script at startup location

Sigma detected: Remcos

Sigma detected: WScript or CScript Dropper

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Uses an obfuscated file name to hide its real file extension (double extension)

Uses threadpools to delay analysis

Windows Scripting host queries suspicious COM object (likely to drop second stage)

Writes to foreign memory regions

Yara detected AntiVM3

Yara detected Costura Assembly Loader

Yara detected Remcos RAT

Yara detected ResolverRAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/b6796a4d9dcedda326af341ca3db33412d59ff54c7a2d50f728bd20c57067e4e

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/b6796a4d9dcedda326af341ca3db33412d59ff54c7a2d50f728bd20c57067e4e/

Threat name:

ByteCode-MSIL.Backdoor.Remcos

Status:

Malicious

First seen:

2025-06-02 01:47:25 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

18 of 24 (75.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=wz4wutm5z3o2gjvpgqokhwztiewvt72uy6rnkd3srpjayvygpzha._file

Verdict:

malicious

Label(s):

remcos

sorano

purecrypter

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:may-logs-ydns discovery rat

Link:

https://tria.ge/reports/250602-hqhwcsfj91/

Behaviour

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Drops startup file

Remcos

Remcos family

Malware Config

C2 Extraction:

rem.ydns.eu:57123

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/4a496c7a-1e96-4571-979f-b253abdc7c81

Unpacked files

SH256 hash:

b6796a4d9dcedda326af341ca3db33412d59ff54c7a2d50f728bd20c57067e4e

MD5 hash:

0f50b913e0dd78241cf88d046e7e59ff

SHA1 hash:

bd7208372a69687220ac84be754ed0fc26ce60f7

Detections:

PureCrypter_Stage1

Link:

https://www.unpac.me/results/cc2a6fcf-4c3a-43d3-b64c-8a1d0c86e204/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/b6796a4d9dce/report/overview.html

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

Threat name:

Malicious File

Score:

0.97

Link:

https://yomi.yoroi.company/submissions/b6796a4d9dcedda326af341ca3db33412d59ff54c7a2d50f728bd20c57067e4e

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

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_EXE_NoneWindowsUA Create hunting rule
Author:	ditekSHen
Description:	Detects Windows executables referencing non-Windows User-Agents

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_imphash 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:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

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:	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.

Cape

https://www.capesandbox.com/analysis/6810/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (GUARD_CF)	high

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