MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 870c31aa344b2950d0ea4849a472dafed312ecee8aa212c47bf543668bbee8e9. 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

SHA256 hash:	870c31aa344b2950d0ea4849a472dafed312ecee8aa212c47bf543668bbee8e9
SHA3-384 hash:	e904e723cedb45016d1e0678e9664334d739eb2a862a7e6203f3c90bcfd61d80acf67226b9eaaab48686c9ff22d67888
SHA1 hash:	211966d5667c154ab49ff9660364eeb7f049ea53
MD5 hash:	d1177ffcb48aeb76822dc94fbba533f9
humanhash:	black-sixteen-eleven-november
File name:	invoice.xlsx
Download:	download sample
Signature	NanoCore Alert Create hunting rule
File size:	1'589'293 bytes
First seen:	2022-04-25 08:46:45 UTC
Last seen:	2022-04-29 09:37:26 UTC
File type:	xlsx
MIME type:	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep	49152:DcAh/h6jG1yQ80ijxrwjJ1SFpTPv1s+3XUMiWo/:D1p6dLcjmVUMRo/
TLSH	T16975335143548DCEDEF943BBBD94EF870F11B248896ADFD6A2DC722D05F06460C9A8CA
TrID	60.1% (.XLSX) Excel Microsoft Office Open XML Format document (34000/1/7) 30.9% (.ZIP) Open Packaging Conventions container (17500/1/4) 7.0% (.ZIP) ZIP compressed archive (4000/1) 1.7% (.PG/BIN) PrintFox/Pagefox bitmap (640x800) (1000/1)
Reporter	pr0xylife
Tags:	CVE-2017-11882 NanoCore xlsx

Office OLE Information

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This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE dump

MalwareBazaar was able to identify 3 sections in this file using oledump:

Section ID	Section size	Section name
A1	1838998 bytes	Ole10Native
A2	0 bytes	SxqJzL02HIxvc

Intelligence

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File Origin

# of uploads :

4

# of downloads :

298

Origin country :

n/a

Vendor Threat Intelligence

ANY.RUN

Malware family:

n/a

ID:

1

File name:

invoice.xlsx

Verdict:

No threats detected

Analysis date:

2022-04-25 14:36:56 UTC

Tags:

n/a

Link:

https://app.any.run/tasks/acc9c2fa-9cd4-48f0-95af-781543bc24e1

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 NanoCore

Detection:

NanoCore

Alert

Create hunting rule

Link:

https://www.capesandbox.com/analysis/266274/

ClamAV Detected

Detection(s):

SecuriteInfo.com.Malware.XML.Autoload-1.UNOFFICIAL

Alert

Create hunting rule

TwinWave.EvilDoc.EQEditorFBShellzLetMeBlowYourMind.20210218.UNOFFICIAL

Alert

Create hunting rule

Dr. Web vxCube Malware

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Sending a custom TCP request

Creating a window

Searching for synchronization primitives

Launching a process

DNS request

Creating a file in the %AppData% directory

Creating a file in the %temp% directory

Сreating synchronization primitives

Creating a file in the %AppData% subdirectories

Sending an HTTP GET request

Unauthorized injection to a recently created process

Unauthorized injection to a recently created process by context flags manipulation

Creating a process from a recently created file

DocGuard Malicious

Result

Verdict:

Malicious

File Type:

OOXML Excel File with Embedding Objects

Link:

https://app.docguard.net/870c31aa344b2950d0ea4849a472dafed312ecee8aa212c47bf543668bbee8e9/results/dashboard

FileScan.IO Suspicious

Verdict:

Suspicious

Threat level:

  5/10

Confidence:

100%

Tags:

embedequation exploit

Link:

https://www.filescan.io/uploads/62666009d0223acc86f0420a/reports/53eb71c7-4c83-42e9-8da5-be94a93ab995/overview

inlyse Malware.AI Malicious

Label:

Malicious

Suspicious Score:

9.8/10

Score Malicious:

99%

Score Benign:

1%

Link:

https://www.malware.ai/gui/files/?id=75b5f747-dde0-45ea-9856-9ba63cb5e03a

InQuest MALICIOUS

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/870c31aa344b2950d0ea4849a472dafed312ecee8aa212c47bf543668bbee8e9

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/982276

Signature

.NET source code contains potential unpacker

Antivirus / Scanner detection for submitted sample

C2 URLs / IPs found in malware configuration

Detected Nanocore Rat

Detected unpacking (creates a PE file in dynamic memory)

Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)

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

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

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: Equation Editor Network Connection

Sigma detected: File Dropped By EQNEDT32EXE

Sigma detected: NanoCore

Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)

Yara detected Nanocore RAT

Behaviour

Behavior Graph:

Download SVG

CERT.PL MWDB nanocore

Detection:

nanocore

Alert

Create hunting rule

Link:

https://mwdb.cert.pl/sample/870c31aa344b2950d0ea4849a472dafed312ecee8aa212c47bf543668bbee8e9/

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

Threat name:

Document-Office.Exploit.CVE-2017-11882

Alert

Create hunting rule

Status:

Malicious

First seen:

2022-04-25 03:51:30 UTC

File Type:

Document

Extracted files:

16

AV detection:

15 of 26 (57.69%)

Threat level:

  5/5

Hatching Triage nanocore

Result

Malware family:

nanocore

Alert

Create hunting rule

Score:

  10/10

Tags:

family:nanocore collection evasion keylogger spyware stealer suricata trojan

Link:

https://tria.ge/reports/220425-kpvvmsgabj/

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: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Suspicious use of SetThreadContext

Accesses Microsoft Outlook accounts

Checks whether UAC is enabled

Loads dropped DLL

Uses the VBS compiler for execution

Blocklisted process makes network request

Downloads MZ/PE file

Executes dropped EXE

NirSoft MailPassView

Nirsoft

NanoCore

suricata: ET MALWARE Possible NanoCore C2 60B

suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

Malware Config

C2 Extraction:

91.193.75.221:4040

VMRay NanoCore

Malware family:

NanoCore

Alert

Create hunting rule

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/870c31aa344b/report/overview.html

VirusTotal

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

YOROI YOMI Suspicious File

Threat name:

Suspicious File

Score:

0.60

Link:

https://yomi.yoroi.company/submissions/870c31aa344b2950d0ea4849a472dafed312ecee8aa212c47bf543668bbee8e9

File information

---

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

Cape

https://www.capesandbox.com/analysis/266274/

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