MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a8085602b4f2d9fa12e7cdc848185b57baef023cbe353df862fac4ff279cf3f4. 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

SilentBuilder

Vendor detections: 12

Maldoc score: 3

Intelligence 12 IOCs YARA 3 File information Comments 1

SHA256 hash:	a8085602b4f2d9fa12e7cdc848185b57baef023cbe353df862fac4ff279cf3f4
SHA3-384 hash:	cb70a6e824d09cb3f460778d16abb149892d8b8043664edddae9254061f32f3fd7bce0e8aea41935059ac354716f1b3e
SHA1 hash:	330da16ce1030f790e7af69597c437e836a27660
MD5 hash:	0de69cf47b1668419d80574923ec5bfd
humanhash:	monkey-paris-charlie-carbon
File name:	0de69cf47b1668419d80574923ec5bfd
Download:	download sample
Signature	SilentBuilder Create hunting rule
File size:	120'832 bytes
First seen:	2022-01-11 12:59:20 UTC
Last seen:	2022-01-11 15:07:26 UTC
File type:	xlsx
MIME type:	application/vnd.ms-excel
ssdeep	3072:bKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgtlyVEdBU6hubsll6UQjvxa:bKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgjj
TLSH	T195C3CF9AB25E886DEA65873048D743AA7727EC314F2F43872615B3267FFC8904B1351B
Reporter	zbetcheckin
Tags:	excel SilentBuilder xlsx

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

Maldoc score: 3

OLE dump

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

Section ID	Section size	Section name
1	4096 bytes	DocumentSummaryInformation
2	4096 bytes	SummaryInformation
3	110483 bytes	Workbook

OLE vba

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

Type	Keyword	Description
AutoExec	Auto_Open	Runs when the Excel Workbook is opened
Suspicious	XLM macro	XLM macro found. It may contain malicious code

Intelligence

File Origin

# of uploads :

# of downloads :

132

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

0de69cf47b1668419d80574923ec5bfd

Verdict:

Malicious activity

Analysis date:

2022-01-11 13:04:03 UTC

Tags:

macros

Link:

https://app.any.run/tasks/410e28cf-2aa3-43dd-bdcf-ae22dbc6aab3

Note:

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

Verdict:

Malicious

File type:

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Has a screenshot:

False

Contains macros:

False

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/218208/

Detection(s):

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.RUNDLL32.EXE.200327.UNOFFICIAL

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.BITSADMIN.EXE.200327.UNOFFICIAL

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.URLDOWNLOADTOFILE.200415.UNOFFICIAL

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.RUNDLL32.EXE.200416.UNOFFICIAL

TwinWave.EvilDoc.Excel4Macro.HiddenSheetDLWAKEUP.20200310.UNOFFICIAL

TwinWave.EvilDoc.Excel4DragoTrainingMontage.20210204.UNOFFICIAL

TwinWave.EvilDoc.XL4MStringFractures.20210921.UNOFFICIAL

TwinWave.EvilDoc.XLSLOLBINHammerToFall.20201218.UNOFFICIAL

TwinWave.EvilDoc.XL4QakyFeaturingNothingNowhere.M2.20210611.UNOFFICIAL

TwinWave.EvilDoc.XL4DataopItWasGoodLivingWithYou.20211109.UNOFFICIAL

TwinWave.EvilDoc.DataOpGodGaveRockNRoll2U.20211215.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

DNS request

Creating a window

Сreating synchronization primitives

Sending a custom TCP request

Creating a file

Creating a process with a hidden window

Launching a process

Moving a recently created file

Sending an HTTP GET request

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

Sending a custom TCP request by exploiting the app vulnerability

Launching a process by exploiting the app vulnerability

Result

Verdict:

Malicious

File Type:

Legacy Excel File

Link:

https://app.docguard.net/a8085602b4f2d9fa12e7cdc848185b57baef023cbe353df862fac4ff279cf3f4/results/dashboard

Payload URLs

URL

File name

https://wordpressdes.vanzolini-gte.org.br/fundacaotelefonica.org.br/gAbC4QpJYI/

WorkBook

Document image

Image:

Download PNG

Verdict:

Malicious

Threat level:

10/10

Confidence:

75%

Tags:

excel.exe macros macros-on-open rundll32 stripped

Link:

https://www.filescan.io/uploads/61dd7f58e997359713dcfb9e/reports/25b9d468-adc9-443b-9a1c-bb4e015d0c93/overview

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/a8085602b4f2d9fa12e7cdc848185b57baef023cbe353df862fac4ff279cf3f4

Details

Autostarting Excel Macro Sheet

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

Result

Threat name:

Hidden Macro 4.0

Detection:

malicious

Classification:

expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/918335

Signature

Antivirus detection for URL or domain

Document contains OLE streams with names of living off the land binaries

Document exploit detected (process start blacklist hit)

Document exploit detected (UrlDownloadToFile)

Found Excel 4.0 Macro with suspicious formulas

Found malicious Excel 4.0 Macro

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

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

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a8085602b4f2d9fa12e7cdc848185b57baef023cbe353df862fac4ff279cf3f4/

Threat name:

Document-Office.Downloader.EncDoc

Status:

Malicious

First seen:

2022-01-11 13:10:44 UTC

AV detection:

13 of 43 (30.23%)

Threat level:

3/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=vaefmavu6lm7uexhzxeeqgc3k65o6ar4xy2t36dc7lcp6j446p2a._file

Result

Malware family:

emotet

Score:

10/10

Tags:

family:emotet banker macro trojan xlm

Link:

https://tria.ge/reports/220111-p8nmwsffg3/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies Internet Explorer settings

Modifies registry class

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Drops file in System32 directory

Loads dropped DLL

Blocklisted process makes network request

Downloads MZ/PE file

Emotet

Process spawned unexpected child process

Malware Config

Dropper Extraction:

https://wordpressdes.vanzolini-gte.org.br/fundacaotelefonica.org.br/gAbC4QpJYI/

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/a8085602b4f2/report/overview.html

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

Threat name:

Malicious File

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/a8085602b4f2d9fa12e7cdc848185b57baef023cbe353df862fac4ff279cf3f4

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.