MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 66b8e804eda79f364e6cd2ee2fdd967f199a1fe3dd7440e8c0ff313568f74531. 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

Neurevt

Vendor detections: 6

Intelligence 6 IOCs YARA 1 File information Comments

SHA256 hash:	66b8e804eda79f364e6cd2ee2fdd967f199a1fe3dd7440e8c0ff313568f74531
SHA3-384 hash:	9db8dae891d3c747235dadd413c4aaed1e014175c36598bfc9d5d17681308878cb07df97144b20314e49c8b49cf6ee68
SHA1 hash:	5d0e3245ec2f35aaecfecb5cfa2af10db8e51451
MD5 hash:	2efbf412cd56c2203e8548512a68ef51
humanhash:	speaker-angel-low-spaghetti
File name:	PO-1364774 Final.xlsx
Download:	download sample
Signature	Neurevt Create hunting rule
File size:	767'488 bytes
First seen:	2020-09-04 09:25:07 UTC
Last seen:	Never
File type:	xlsx
MIME type:	application/encrypted
ssdeep	12288:naAuAp+kablup58ujINGKWrnHMH9yIkR0b8Fi9EwFrDXn07K2NBhMJi1fvIU7KuR:awsY5PkN1cy9DkoBTFrDE7K0hMo1oUW4
TLSH	6CF42371FBE3C717E22BBBB964C1662488ED3C540994D74B064639A3CE39FA461E01DE
Reporter	abuse_ch
Tags:	BetaBot Neurevt SendGrid xlsx

abuse_ch

Malspam distributing Neurevt:

HELO: wrqvxfbf.outbound-mail.sendgrid.net
Sending IP: 149.72.175.191
From: Nancy fanny <ckqjuyoaj@em9595.arctictrading.com.au>
Subject: Proforma invoice needed Urgently.
Attachment: PO-1364774 Final.xlsx

Neurevt payload URL:
http://eastexs.com/~zadmin/div/me.exe

Neurevt C2:
http://eastexs.com/~zadmin/lk/zp/logout.php

Intelligence

File Origin

# of uploads :

# of downloads :

1'820

Origin country :

n/a

Vendor Threat Intelligence

Detection(s):

PUA.Doc.Packed.EncryptedDoc-6563700-0

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Launching a process

DNS request

Creating a file in the %AppData% directory

Creating a file in the %temp% directory

Creating a file

Creating a file in the %AppData% subdirectories

Launching cmd.exe command interpreter

Adding an access-denied ACE

Moving a system file

Launching a service

Unauthorized injection to a browser process

Unauthorized injection to a recently created process

Searching for analyzing tools

Searching for the window

Changing a file

Setting browser functions hooks

Launching a file downloaded from the Internet

Enabling autorun for a service

Firewall traversal

Setting a single autorun event

Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch

Changing settings of the browser security zones

Connection attempt to an infection source

Sending an HTTP GET request to an infection source by exploiting the app vulnerability

Creating a process from a recently created file

Unauthorized injection to a system process

Enabling autorun

Sending an HTTP POST request to an infection source

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/66b8e804eda79f364e6cd2ee2fdd967f199a1fe3dd7440e8c0ff313568f74531/

Threat name:

Win32.Trojan.Ymacco

Status:

Malicious

First seen:

2020-09-04 08:19:33 UTC

AV detection:

17 of 48 (35.42%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=m24oqbhnu6ptmttm2lxc7xmwp4mzuh7d3v2eb2ga74ytk2hxiuyq._file

Result

Malware family:

betabot

Score:

10/10

Tags:

evasion trojan backdoor botnet family:betabot persistence

Link:

https://tria.ge/reports/200904-5scvaehy4x/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Launches Equation Editor

Modifies Internet Explorer settings

Modifies registry class

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

NSIS installer

Suspicious use of NtSetInformationThreadHideFromDebugger

Adds Run key to start application

Checks whether UAC is enabled

Drops desktop.ini file(s)

Checks BIOS information in registry

Loads dropped DLL

Uses the VBS compiler for execution

Blacklisted process makes network request

Executes dropped EXE

Sets file execution options in registry

BetaBot

Modifies firewall policy service

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

Threat name:

Exploit

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/66b8e804eda79f364e6cd2ee2fdd967f199a1fe3dd7440e8c0ff313568f74531

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.