MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 866de3bdc1cc207c818212511641cdf5e6220f304619a26b5e9cb2d2b9c8a309. 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 YARA 16 File information Comments

SHA256 hash:	866de3bdc1cc207c818212511641cdf5e6220f304619a26b5e9cb2d2b9c8a309
SHA3-384 hash:	ded4d03af805f77d647d8e858e7c791775dc349d8ca4919f7abc91ea06426ee1be90314071c54f2591ea8452847fce15
SHA1 hash:	6f8377e4b95fd9f5af3921616410b2c986dfb8ba
MD5 hash:	3112375e035766a604350754d20460dd
humanhash:	two-dakota-july-lima
File name:	DELAY NOTICE - HUMPERT-WH (SO.5649) 521.PDF.scr
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	1'019'904 bytes
First seen:	2024-05-21 01:14:15 UTC
Last seen:	2024-05-21 02:28:36 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep	24576:wn698VVYl6Jic3uH34B+HH5U3F7+IYz8pLjG0:H9SBx3uX4Q5U3pnYO/G0
TLSH	T1DB2523509BD942B2C13E03F9FE7A559103B2D626A090FF984CDE24DB6E1BF56911322F
TrID	69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.0% (.EXE) Win64 Executable (generic) (10523/12/4) 6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.2% (.EXE) Win32 Executable (generic) (4504/4/1) 1.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
File icon (PE):
dhash icon	f0ccece8e0e8ccf0 (2 x AgentTesla, 1 x RemcosRAT, 1 x AsyncRAT)
Reporter	threatcat_ch
Tags:	exe RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

324

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

866de3bdc1cc207c818212511641cdf5e6220f304619a26b5e9cb2d2b9c8a309.exe

Verdict:

Malicious activity

Analysis date:

2024-05-21 01:14:35 UTC

Tags:

rat remcos remote evasion stealer

Link:

https://app.any.run/tasks/0c702e28-fd61-4183-8380-bf6f6061ea0a

Note:

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

Detection(s):

SecuriteInfo.com.Win32.CrypterX-gen.23226.27600.UNOFFICIAL

Verdict:

Malicious

Score:

95.7%

Tags:

Stealth Msil

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Unauthorized injection to a recently created process

Restart of the analyzed sample

Creating a file

Сreating synchronization primitives

Connection attempt

Sending a custom TCP request

DNS request

Sending an HTTP GET request

Reading critical registry keys

Creating a file in the %temp% directory

Stealing user critical data

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

masquerade packed

Link:

https://www.filescan.io/uploads/664bf598490de9911e1905d9/reports/2f5bc090-cd1f-4035-b147-d06aaa930abc/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/866de3bdc1cc207c818212511641cdf5e6220f304619a26b5e9cb2d2b9c8a309

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/db8228af-f0c1-447a-9065-f0a073173ced

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.phis.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1444650

Signature

.NET source code contains potential unpacker

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Contains functionality to bypass UAC (CMSTPLUA)

Contains functionality to inject code into remote processes

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

Delayed program exit found

Found malware configuration

Initial sample is a PE file and has a suspicious name

Injects a PE file into a foreign processes

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Maps a DLL or memory area into another process

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

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)

Yara detected AntiVM3

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Yara detected WebBrowserPassView password recovery tool

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/866de3bdc1cc207c818212511641cdf5e6220f304619a26b5e9cb2d2b9c8a309

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/866de3bdc1cc207c818212511641cdf5e6220f304619a26b5e9cb2d2b9c8a309/

Threat name:

ByteCode-MSIL.Backdoor.Remcos

Status:

Malicious

First seen:

2024-05-21 01:15:07 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

18 of 23 (78.26%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=qzw6hpobzqqhzamccjirmqon6xtcedzqiym2e226tsznfooiumeq._file

Verdict:

malicious

Label(s):

remcos

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost collection rat spyware stealer

Link:

https://tria.ge/reports/240521-bl8snadg5t/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Accesses Microsoft Outlook accounts

Reads user/profile data of web browsers

NirSoft MailPassView

NirSoft WebBrowserPassView

Nirsoft

Remcos

Malware Config

C2 Extraction:

104.250.180.178:7902

Unpacked files

SH256 hash:

f540e8d603962027b3a1f8b86d035281bfbdd3a05a621ead255825bc2082632a

MD5 hash:

d172f59251b97b415b621d302e1be2b7

SHA1 hash:

b1534e603749c901b5ac185f20e281f6be7fa908

Link:

https://www.unpac.me/results/c727acec-6292-4a0a-a6be-b54ad4059483/

SH256 hash:

82f347425155ff89c75aea42a0666131f9a00c3250a8c44436dc6e9e19cea961

MD5 hash:

8153bce0b56803e7083fc87dc58f0b30

SHA1 hash:

451beb6c1572ae91844aad78f4a312acde40aae5

Link:

https://www.unpac.me/results/c727acec-6292-4a0a-a6be-b54ad4059483/

SH256 hash:

69dd751153f6ae4f2c008b12bcbf20b1328be9e0bda45f08eb8f32a837f34ba5

MD5 hash:

e47f6f1f5e743fdbf9d6579b96748a2b

SHA1 hash:

21dbce7b186f72c69647fce6aa0b5cf403aa87c4

Detections:

Remcos

win_remcos_w0

win_remcos_auto

malware_windows_remcos_rat

INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

Link:

https://www.unpac.me/results/c727acec-6292-4a0a-a6be-b54ad4059483/

Parent samples :

866de3bdc1cc207c818212511641cdf5e6220f304619a26b5e9cb2d2b9c8a309
b27ccf7bb556e1f332c8feb3a12f6f3c4b0ba949c059cdc3a1bdd416fb87921e
ac28e104b06d7025bab07468070e74b3ea0017b34d25e48150b6c55f8ffda4bf
69dd751153f6ae4f2c008b12bcbf20b1328be9e0bda45f08eb8f32a837f34ba5
1f350a9bcaccdb51ef9e784c123fb27099be181fcb39f9bac5130c4cedc190b1

SH256 hash:

27ddc96465ac70b602e730ca4b28018a2875f5aca4215f3d8608b9defc8bf23d

MD5 hash:

1b2614489be216f14010dea5dee50dc5

SHA1 hash:

046c2462662dc3adea1c79121b4d865665850e23

Link:

https://www.unpac.me/results/c727acec-6292-4a0a-a6be-b54ad4059483/

SH256 hash:

866de3bdc1cc207c818212511641cdf5e6220f304619a26b5e9cb2d2b9c8a309

MD5 hash:

3112375e035766a604350754d20460dd

SHA1 hash:

6f8377e4b95fd9f5af3921616410b2c986dfb8ba

Link:

https://www.unpac.me/results/c727acec-6292-4a0a-a6be-b54ad4059483/

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/866de3bdc1cc207c818212511641cdf5e6220f304619a26b5e9cb2d2b9c8a309

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

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

Rule name:	iexplorer_remcos Create hunting rule
Author:	iam-py-test
Description:	Detect iexplorer being taken over by Remcos

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:	maldoc_find_kernel32_base_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	NET Create hunting rule
Author:	malware-lu

Rule name:	NETexecutableMicrosoft Create hunting rule
Author:	malware-lu

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

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_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

exe 866de3bdc1cc207c818212511641cdf5e6220f304619a26b5e9cb2d2b9c8a309

(this sample)

Delivery method

Distributed via e-mail attachment

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 (HIGH_ENTROPY_VA)	high

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