MalwareBazaar Database

Intelligence

File Origin

Vendor Threat Intelligence

ANY.RUN Malicious

Malware family:

n/a

ID:

1

File name:

PO_SRL2020426.xlsx

Verdict:

Malicious activity

Analysis date:

2021-03-29 19:49:07 UTC

Tags:

encrypted exploit CVE-2017-11882 rat nanocore

Link:

https://app.any.run/tasks/6af285ae-34dc-4810-a22a-8aa0e28d233a

Note:

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

BitDam Malicious

Verdict:

Malicious

File type:

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Has a screenshot:

False

Contains macros:

False

CAPE Sandbox

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/127603/

ClamAV Detected

Detection(s):

PUA.Doc.Packed.EncryptedDoc-6563700-0

Alert

Create hunting rule

Dr. Web vxCube Malware

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Launching a process

DNS request

Creating a file

Launching a file downloaded from the Internet

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

Creating a process from a recently created file

DocGuard Malicious

Result

Verdict:

Malicious

File Type:

OOXML Excel File with Embedding Objects in Encrypted Excel File

Link:

https://app.docguard.net/a9dd5583f75c18a915745ca35e8331a0bdd7b2fb4eb5f072430a97515d521632/results/dashboard

Document image

Image:

Download PNG

InQuest MALICIOUS

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/a9dd5583f75c18a915745ca35e8331a0bdd7b2fb4eb5f072430a97515d521632

Details

Document With No Content

Document contains little or no semantic information.

Joe Sandbox Nanocore

Result

Threat name:

Nanocore

Alert

Create hunting rule

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/657033

Signature

.NET source code contains potential unpacker

Allocates memory in foreign processes

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Detected Nanocore Rat

Drops PE files to the user root directory

Found malware configuration

Hides that the sample has been downloaded from the Internet (zone.identifier)

Injects a PE file into a foreign processes

Machine Learning detection for dropped file

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Office equation editor drops PE file

Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)

Sigma detected: Droppers Exploiting CVE-2017-11882

Sigma detected: EQNEDT32.EXE connecting to internet

Sigma detected: Executables Started in Suspicious Folder

Sigma detected: Execution in Non-Executable Folder

Sigma detected: File Dropped By EQNEDT32EXE

Sigma detected: NanoCore

Sigma detected: Scheduled temp file as task from temp location

Sigma detected: Suspicious Program Location Process Starts

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

Writes to foreign memory regions

Yara detected AntiVM3

Yara detected Nanocore RAT

Behaviour

Behavior Graph:

Download SVG

CERT.PL MWDB

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a9dd5583f75c18a915745ca35e8331a0bdd7b2fb4eb5f072430a97515d521632/

ReversingLabs TitaniumCloud Document-Office.Exploit.CVE-2017-11882

Threat name:

Document-Office.Exploit.CVE-2017-11882

Alert

Create hunting rule

Status:

Malicious

First seen:

2021-03-29 12:05:00 UTC

AV detection:

14 of 29 (48.28%)

Threat level:

  5/5

Spamhaus Hash Blocklist Suspicious file

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=vhovla7xlqmksflulsrv5azruc65pmx3j227a4sdbklvcxkscyza._file

Hatching Triage nanocore

Result

Malware family:

nanocore

Alert

Create hunting rule

Score:

  10/10

Tags:

family:nanocore keylogger spyware stealer trojan

Link:

https://tria.ge/reports/210329-dtdp74qyqj/

Behaviour

Checks processor information in registry

Creates scheduled task(s)

Enumerates system info in registry

Launches Equation Editor

Modifies Internet Explorer settings

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Suspicious use of SetThreadContext

Loads dropped DLL

Uses the VBS compiler for execution

Blocklisted process makes network request

Executes dropped EXE

NanoCore

Malware Config

C2 Extraction:

194.5.98.250:1012
nassiru1144.ddns.net:1012

VirusTotal

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

YOROI YOMI Exploit

Threat name:

Exploit

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/a9dd5583f75c18a915745ca35e8331a0bdd7b2fb4eb5f072430a97515d521632

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.

File information

The table below shows additional information about this malware sample such as delivery method and external references.

  

Delivery method

Distributed via e-mail attachment

Cape

https://www.capesandbox.com/analysis/127603/

  

URLhaus

https://urlhaus.abuse.ch/url/1044823/

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