MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 58574a8edd6e1573ac8b4d515c0da8d269bc85bd1e8badd191def36e6257a25c. 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: 7

Intelligence 7 IOCs YARA 2 File information Comments

SHA256 hash:	58574a8edd6e1573ac8b4d515c0da8d269bc85bd1e8badd191def36e6257a25c
SHA3-384 hash:	f6dd87c1849bac424531a4276e9b8f6c284e82c660c4888b459664eb1ef9b3c5c6eabd186f77a3bf6109acd2d1c08135
SHA1 hash:	ab920b78d80ee1505947999e1377a03102c2fcb8
MD5 hash:	3c604848367f9d958c1ff87e03d2ee14
humanhash:	california-bacon-alpha-bluebird
File name:	Archivo Pdf.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	327'249 bytes
First seen:	2020-08-15 05:48:33 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	24f4223e271413c25abad52fd456a9bc (21 x GuLoader, 15 x Loki, 10 x AgentTesla)
ssdeep	6144:cHfYbxbjuNZPkoAxUCE4SZJARk2RALq4J7hCaStGaZKgvPWH:cAu7Pk/Uz4SfARwLZ97QIg2H
TLSH	99641205F380D8BBDA0106B099354ABB7BBB9D62A1349D032BC43B5DFD974E6991F342
Reporter	abuse_ch
Tags:	ESP exe geo Outlook RAT RemcosRAT

abuse_ch

Malspam distributing RemcosRAT:

HELO: NAM12-DM6-obe.outbound.protection.outlook.com
Sending IP: 40.92.22.91
From: LABORATORIOEMSSAR S.A.S ARAUQUITA <laboratorioemssar@hotmail.com>
Subject: Documentos para revisar
Attachment: Archivo Pdf.uu (contains "Archivo Pdf.exe")

RemcosRAT C2:
marianavilla3008n.duckdns.org:2047 (191.88.217.14)

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

n/a

Vendor Threat Intelligence

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/46226/

Detection(s):

PUA.Win.Adware.Browserio-6725861-0

SecuriteInfo.com.BehavesLike.Win32.ObfusRansom.bc.6542.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a file in the %temp% directory

Creating a file

Creating a file in the %AppData% subdirectories

Sending a UDP request

Launching a process

Launching cmd.exe command interpreter

Deleting a recently created file

Transferring files using the Background Intelligent Transfer Service (BITS)

Enabling the 'hidden' option for recently created files

Moving a file to the %AppData% subdirectory

DNS request

Connection attempt

Unauthorized injection to a system process

Setting a global event handler for the keyboard

Enabling autorun by creating a file

Result

Threat name:

Remcos

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/431668

Signature

Contains functionality to capture and log keystrokes

Contains functionality to inject code into remote processes

Contains functionality to steal Chrome passwords or cookies

Contains functionality to steal Firefox passwords or cookies

Detected Remcos RAT

Hijacks the control flow in another process

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Maps a DLL or memory area into another process

Overwrites code with unconditional jumps - possibly settings hooks in foreign process

Sigma detected: Remcos

Uses dynamic DNS services

Yara detected Remcos RAT

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/58574a8edd6e1573ac8b4d515c0da8d269bc85bd1e8badd191def36e6257a25c/

Threat name:

Win32.Backdoor.Remcos

Status:

Malicious

First seen:

2020-08-15 05:50:10 UTC

AV detection:

22 of 28 (78.57%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=lbluvdw5nykxhleljvivydni2ju3zbn5d2f23umr33zw4ysxujoa._file

Verdict:

suspicious

Result

Malware family:

remcos

Score:

10/10

Tags:

rat family:remcos

Link:

https://tria.ge/reports/200815-nydgcbbd42/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Drops file in Windows directory

Loads dropped DLL

Blacklisted process makes network request

Remcos

Malware Config

C2 Extraction:

marianavilla3008n.duckdns.org:2047

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

Threat name:

Remcos

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/58574a8edd6e1573ac8b4d515c0da8d269bc85bd1e8badd191def36e6257a25c

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:	ach_RemcosRAT Create hunting rule
Author:	abuse.ch

Rule name:	win_remcos_auto Create hunting rule
Author:	Felix Bilstein - yara-signator at cocacoding dot com
Description:	autogenerated rule brought to you by yara-signator