MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b53a3f09073ba4c63f1634b32bc6328f22d9965ebc1384797a886d07959313fa. 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 4 File information Comments

SHA256 hash:	b53a3f09073ba4c63f1634b32bc6328f22d9965ebc1384797a886d07959313fa
SHA3-384 hash:	28f549ee4963278d0287f0989817f8256851220fca84ed1575ca93ee3b34c091c5d3316251483e1f09d38eef1f18f57b
SHA1 hash:	24c6168bf9e9410ad099c3c070573a48c7e019b6
MD5 hash:	621a3e1557fa5b1cc549d9b78514a96e
humanhash:	uniform-zebra-idaho-lemon
File name:	SecuriteInfo.com.Exploit.Siggen3.24636.4425.27580
Download:	download sample
Signature	SilentBuilder Create hunting rule
File size:	115'712 bytes
First seen:	2022-01-11 17:44:45 UTC
Last seen:	Never
File type:	xlsx
MIME type:	application/vnd.ms-excel
ssdeep	3072:yKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgQCyVEdBU6hubsll6UQjvxW:yKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgb7
TLSH	T147B3CF9AB21E886DEA658B3058D7439A7727EC314F6F43872615B3227FBC8D04B1350B
Reporter	SecuriteInfoCom
Tags:	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	105003 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 :

195

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

SecuriteInfo.com.Exploit.Siggen3.24636.4425.27580

Verdict:

Malicious activity

Analysis date:

2022-01-11 18:24:08 UTC

Tags:

macros loader

Link:

https://app.any.run/tasks/f59df61a-34b9-4c9b-8864-40bce08458ad

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/218290/

Detection(s):

SecuriteInfo.com.Exploit.Siggen3.24636.4425.27580.UNOFFICIAL

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

Sending a custom TCP request

Creating a window

Сreating synchronization primitives

Creating a file

Creating a process with a hidden window

Launching a process

Sending an HTTP GET request

Launching a process by exploiting the app vulnerability

Result

Verdict:

Malicious

File Type:

Legacy Excel File

Link:

https://app.docguard.net/b53a3f09073ba4c63f1634b32bc6328f22d9965ebc1384797a886d07959313fa/results/dashboard

Payload URLs

URL

File name

http://gaidov.bg/wp-includes/Ug/

WorkBook

Document image

Image:

Download PNG

Verdict:

Malicious

Threat level:

10/10

Confidence:

75%

Tags:

excel.exe macros macros-on-open print.exe rundll32 stripped

Link:

https://www.filescan.io/uploads/61ddc222e997359713dd75f4/reports/d97f2173-b4a4-4711-a7b9-82fecbc5930f/overview

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/b53a3f09073ba4c63f1634b32bc6328f22d9965ebc1384797a886d07959313fa

Details

Autostarting Excel Macro Sheet

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

Result

Threat name:

Hidden Macro 4.0 Emotet

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/918551

Signature

Antivirus detection for dropped file

Antivirus detection for URL or domain

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

Document exploit detected (creates forbidden files)

Document exploit detected (drops PE files)

Document exploit detected (process start blacklist hit)

Document exploit detected (UrlDownloadToFile)

Drops PE files to the user root directory

Found Excel 4.0 Macro with suspicious formulas

Found malicious Excel 4.0 Macro

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

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)

Office process drops PE file

Sigma detected: Microsoft Office Product Spawning Windows Shell

Yara detected Emotet

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/b53a3f09073ba4c63f1634b32bc6328f22d9965ebc1384797a886d07959313fa/

Threat name:

Document-Excel.Downloader.EncDoc

Status:

Malicious

First seen:

2022-01-11 17:45:16 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=wu5d6cihhosmmpywgszsxrrsr4rntfs6xqjyi6l2rbwqpfmtcp5a._file

Result

Malware family:

emotet

Score:

10/10

Tags:

family:emotet botnet:epoch4 banker macro trojan xlm

Link:

https://tria.ge/reports/220111-wbqjjsgef4/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies Internet Explorer settings

Modifies registry class

Suspicious behavior: AddClipboardFormatListener

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Drops file in System32 directory

Loads dropped DLL

Downloads MZ/PE file

Emotet

Process spawned unexpected child process

Malware Config

C2 Extraction:

131.100.24.231:80
209.59.138.75:7080
103.8.26.103:8080
51.38.71.0:443
212.237.17.99:8080
79.172.212.216:8080
207.38.84.195:8080
104.168.155.129:8080
178.79.147.66:8080
46.55.222.11:443
103.8.26.102:8080
192.254.71.210:443
45.176.232.124:443
203.114.109.124:443
51.68.175.8:8080
58.227.42.236:80
45.142.114.231:8080
217.182.143.207:443
178.63.25.185:443
45.118.115.99:8080
103.75.201.2:443
104.251.214.46:8080
158.69.222.101:443
81.0.236.90:443
45.118.135.203:7080
176.104.106.96:8080
212.237.56.116:7080
216.158.226.206:443
173.212.193.249:8080
50.116.54.215:443
138.185.72.26:8080
41.76.108.46:8080
212.237.5.209:443
107.182.225.142:8080
195.154.133.20:443
162.214.50.39:7080
110.232.117.186:8080

Dropper Extraction:

http://gaidov.bg/wp-includes/Ug/
http://studiokrishnaproduction.com/wp-includes/3mJ/

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/b53a3f09073ba4c63f1634b32bc6328f22d9965ebc1384797a886d07959313fa

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.