MalwareBazaar Database

Office OLE Information

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

OLE id

OLE dump

MalwareBazaar was able to identify 4 sections in this file using oledump:

OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

Intelligence

File Origin

Vendor Threat Intelligence

ANY.RUN Malicious

Malware family:

n/a

ID:

1

File name:

fb.xls

Verdict:

Malicious activity

Analysis date:

2021-02-05 05:52:06 UTC

Tags:

macros trojan formbook stealer

Link:

https://app.any.run/tasks/2f7f5794-0112-4e3a-9860-af9fc2fdfd13

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.ms-excel

Has a screenshot:

False

Contains macros:

True

ClamAV Detected

Detection(s):

TwinWave.EvilDoc.SUPExcel4MacroVines.201109.UNOFFICIAL

Alert

Create hunting rule

TwinWave.EvilDoc.DOCXRSTRGOOD.NEW-OBJECT.201125.UNOFFICIAL

Alert

Create hunting rule

TwinWave.EvilDoc.Excel4HTTPSpliceNaughtyByNatureNotCauseIHateYa.20210131.UNOFFICIAL

Alert

Create hunting rule

TwinWave.EvilDoc.XLS4SunriseAutobahn.20210115.UNOFFICIAL

Alert

Create hunting rule

Dr. Web vxCube Malware

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a process with a hidden window

Launching a process

DNS request

Sending a custom TCP request

Creating a file

Moving a file to the %temp% directory

Running batch commands by exploiting the app vulnerability

DocGuard Malicious

Result

Verdict:

Malicious

File Type:

Legacy Office File

Link:

https://app.docguard.net/5ad32c0d74aaa70959de570a26e152861ec61dec87216423d17813c78b4bf629/results/dashboard

Document image

Image:

Download PNG

InQuest MALICIOUS

Result

Verdict:

MALICIOUS

Details

Macro Execution Coercion

Detected a document that appears to social engineer the user into activating embedded logic.

Autostarting Excel Macro Sheet

Excel contains Macrosheet logic that will trigger automatically upon document open.

Joe Sandbox Hidden Macro 4.0

Result

Threat name:

Hidden Macro 4.0

Alert

Create hunting rule

Detection:

malicious

Classification:

expl.evad

Score:

96 / 100

Link:

https://www.joesandbox.com/analysis/600183

Signature

Bypasses PowerShell execution policy

Connects to a URL shortener service

Creates HTML files with .exe extension (expired dropper behavior)

Document exploit detected (process start blacklist hit)

Found Excel 4.0 Macro with suspicious formulas

Found obfuscated Excel 4.0 Macro

Multi AV Scanner detection for submitted file

Obfuscated command line found

Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)

Sigma detected: Microsoft Office Product Spawning Windows Shell

Sigma detected: Powershell downloading file from url shortener site

Behaviour

Behavior Graph:

Download SVG

CERT.PL MWDB

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/5ad32c0d74aaa70959de570a26e152861ec61dec87216423d17813c78b4bf629/

ReversingLabs TitaniumCloud Document-Word.Downloader.EncDoc

Threat name:

Document-Word.Downloader.EncDoc

Alert

Create hunting rule

Status:

Malicious

First seen:

2021-02-04 11:39:35 UTC

File Type:

Document

Extracted files:

9

AV detection:

17 of 28 (60.71%)

Threat level:

  3/5

Spamhaus Hash Blocklist Malicious file

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=lljsydluvktqswo6k4fcnyksqypmmhpmq4qwii6rpaj4pc2l6yuq._file

Hatching Triage Malicious

Result

Malware family:

n/a

Score:

  10/10

Tags:

macro xlm

Link:

https://tria.ge/reports/210205-j7at98jr16/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies Internet Explorer settings

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Blocklisted process makes network request

Process spawned unexpected child process

Malware Config

Dropper Extraction:

https://tinyurl.com/24l9p9lc

VirusTotal

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

YOROI YOMI Malicious File

Threat name:

Malicious File

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/5ad32c0d74aaa70959de570a26e152861ec61dec87216423d17813c78b4bf629

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.

Comments