MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8084639a37257615b09beac5c8f681aa2115ece62fcb003fc8ddadb0d833fdb7. 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: 11

Intelligence 11 IOCs YARA 9 File information Comments

SHA256 hash:	8084639a37257615b09beac5c8f681aa2115ece62fcb003fc8ddadb0d833fdb7
SHA3-384 hash:	71911c807962efb237625bf0261ec483717534458e4c727a39138160535542784b26f95ac6e9132b3465f956f4ba06de
SHA1 hash:	d5adc1b8c78a138969f0bb7b50219ad9ad682e5c
MD5 hash:	d0cf67cc18970f999e6fb9fad2f96493
humanhash:	mirror-bakerloo-uncle-oven
File name:	Payment Invoice PDF.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	544'256 bytes
First seen:	2021-01-21 06:20:09 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'205 x SnakeKeylogger)
ssdeep	12288:q0ECo42Y1e0LwY21xRlpaoUqhA8nWNMe2jJ+KeGQo4kp:q0pgYUGwN1xjpao1WNmxeho
TLSH	47C4021673989F65E0FE9BB46675010003F6F216A772EB1E6FC460AC2DB3B50C516B4B
Reporter	abuse_ch
Tags:	exe RAT RemcosRAT

abuse_ch

Malspam distributing RemcosRAT:

HELO: vps.asswart.com
Sending IP: 45.85.90.28
From: Jainson Naik <office@briglum.com>
Subject: Payment terms
Attachment: Payment Invoice PDF.iso (contains "Payment Invoice PDF.exe")

RemcosRAT C2:
mikegrace2021.ddns.net

Intelligence

File Origin

# of uploads :

# of downloads :

136

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Payment Invoice PDF.exe

Verdict:

Malicious activity

Analysis date:

2021-01-21 06:28:35 UTC

Tags:

rat remcos keylogger

Link:

https://app.any.run/tasks/15db2bdf-358a-4e23-8fe0-e32745f3d211

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/113216/

Detection(s):

SecuriteInfo.com.Trojan.Packed2.42809.10594.6609.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Sending a UDP request

Launching a process

Creating a process with a hidden window

Result

Threat name:

Remcos

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/586920

Signature

.NET source code contains method to dynamically call methods (often used by packers)

.NET source code contains potential unpacker

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

Initial sample is a PE file and has a suspicious name

Injects a PE file into a foreign processes

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Sigma detected: Remcos

Sigma detected: Scheduled temp file as task from temp location

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

Uses dynamic DNS services

Uses schtasks.exe or at.exe to add and modify task schedules

Yara detected AntiVM_3

Yara detected Remcos RAT

Behaviour

Behavior Graph:

Download SVG

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/8084639a37257615b09beac5c8f681aa2115ece62fcb003fc8ddadb0d833fdb7/

Threat name:

ByteCode-MSIL.Trojan.Taskun

Status:

Malicious

First seen:

2021-01-20 18:33:31 UTC

AV detection:

11 of 28 (39.29%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=qccghgrxev3blme35lc4r5ubviqrl3hgf7fqap6i3ww3bwbt7w3q._file

Verdict:

unknown

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos ransomware rat

Link:

https://tria.ge/reports/210121-gl5nd9l2f2/

Behaviour

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Suspicious use of SetThreadContext

Remcos

Malware Config

C2 Extraction:

mikegrace2021.ddns.net:1999

Unpacked files

SH256 hash:

f198ba4960e027631017249be944ed1235f54bb4d30013d2b763502b54c05d14

MD5 hash:

1df750e92779ec9fb03bd72a25274a37

SHA1 hash:

c7c2f07bce95130d60f24b42833925e138f26c32

Link:

https://www.unpac.me/results/1ba06fee-5ad7-4082-8292-c2eb844290b3/

SH256 hash:

b515f4cd7859e142c72083cf036e5770988a66f096b5a0feebece7cccb675bdb

MD5 hash:

21401a93428a64425ff6fcbb0cd5139f

SHA1 hash:

a7a9647b5e0e31a92769699c142ba7d848fc36e8

Detections:

win_remcos_g0

win_remcos_auto

Link:

https://www.unpac.me/results/1ba06fee-5ad7-4082-8292-c2eb844290b3/

Parent samples :

3f416eb40a2f3043bb0e16cc684a3cecdae3fee9f340e4adf9ddb700e4bf2cfd
8084639a37257615b09beac5c8f681aa2115ece62fcb003fc8ddadb0d833fdb7

SH256 hash:

e90987be8cd343e4272281576132aee38badcd137c1321d6f142a0ecd478a934

MD5 hash:

fb55d3d892113cc4dc9933bf34c1835e

SHA1 hash:

580136d93b068ad728743a7683ec13e5cf1c4e79

Link:

https://www.unpac.me/results/1ba06fee-5ad7-4082-8292-c2eb844290b3/

SH256 hash:

8084639a37257615b09beac5c8f681aa2115ece62fcb003fc8ddadb0d833fdb7

MD5 hash:

d0cf67cc18970f999e6fb9fad2f96493

SHA1 hash:

d5adc1b8c78a138969f0bb7b50219ad9ad682e5c

Link:

https://www.unpac.me/results/1ba06fee-5ad7-4082-8292-c2eb844290b3/

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

Threat name:

Farheyt

Score:

0.80

Link:

https://yomi.yoroi.company/submissions/8084639a37257615b09beac5c8f681aa2115ece62fcb003fc8ddadb0d833fdb7

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:	Chrome_stealer_bin_mem Create hunting rule
Author:	James_inthe_box
Description:	Chrome in files like avemaria

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

Rule name:	Keylog_bin_mem Create hunting rule
Author:	James_inthe_box
Description:	Contains Keylog

Rule name:	Parallax Create hunting rule
Author:	@bartblaze
Description:	Identifies Parallax RAT.

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

Rule name:	remcos_rat Create hunting rule
Author:	jeFF0Falltrades

Rule name:	REMCOS_RAT_variants Create hunting rule

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