MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 77d7199bee787fb17ba47e4461be479b626921734ac55b7b76d42531c3b1a211. 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: 11

Maldoc score: 3

Intelligence 11 IOCs YARA 4 File information Comments 1

SHA256 hash:	77d7199bee787fb17ba47e4461be479b626921734ac55b7b76d42531c3b1a211
SHA3-384 hash:	9fb3a2287625d9b9d9200eaab5680c9205d822f6511fe2801d7c747795cf7ca27fe4364e17cbc9fa3482a97f874ef2f5
SHA1 hash:	378cf7a839bc7e9b8499e6ed3e982fdaee22291c
MD5 hash:	1f2b5e7a4f1bd7269cff1d9805b0311f
humanhash:	lion-undress-winner-lemon
File name:	1f2b5e7a4f1bd7269cff1d9805b0311f
Download:	download sample
Signature	SilentBuilder Create hunting rule
File size:	120'832 bytes
First seen:	2022-01-11 21:09:54 UTC
Last seen:	Never
File type:	xlsx
MIME type:	application/vnd.ms-excel
ssdeep	3072:bKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgtlyVEdBU6hubsll6UQjvxO:bKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgjv
TLSH	T1DFC3CF9AB25E886DEA65873048D743AA7727EC314F2F43872615B3267FFC8904B1351B
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 :

202

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

1f2b5e7a4f1bd7269cff1d9805b0311f

Verdict:

No threats detected

Analysis date:

2022-01-11 21:28:12 UTC

Tags:

macros

Link:

https://app.any.run/tasks/d88c12c4-48ab-45e3-926d-b64f173e4010

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/218345/

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

Creating a file

Sending an HTTP GET request

Result

Verdict:

Malicious

File Type:

Legacy Excel File

Link:

https://app.docguard.net/77d7199bee787fb17ba47e4461be479b626921734ac55b7b76d42531c3b1a211/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:

60%

Tags:

coinminer emotet excel.exe exploit macros macros-on-open rundll32 stripped

Link:

https://www.filescan.io/uploads/61ddf22e1883c5ba4ec27d3b/reports/c3326c25-022d-481a-b576-cf309c650ce9/overview

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/77d7199bee787fb17ba47e4461be479b626921734ac55b7b76d42531c3b1a211

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/918699

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/77d7199bee787fb17ba47e4461be479b626921734ac55b7b76d42531c3b1a211/

Threat name:

Document-Excel.Downloader.EncDoc

Status:

Malicious

First seen:

2022-01-11 21:09:41 UTC

File Type:

Document

Extracted files:

AV detection:

14 of 28 (50.00%)

Threat level:

3/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=o7lrtg7opb73c65epzcgdpshtnrgsiltjlcvw63w2qstdq5ruiiq._file

Result

Malware family:

emotet

Score:

10/10

Tags:

family:emotet banker macro trojan xlm

Link:

https://tria.ge/reports/220111-zz3esshcd9/

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/77d7199bee78/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/77d7199bee787fb17ba47e4461be479b626921734ac55b7b76d42531c3b1a211

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.