MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 820782b726d21a833928abe4f2873c178d5cdf7a9b5f6665113e0504b8df7c46. 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 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 820782b726d21a833928abe4f2873c178d5cdf7a9b5f6665113e0504b8df7c46
SHA3-384 hash: 504ce80ba3e10d5621510d12185c26485a076b97c7f7e88cd687457f407e48123346189736caf0d6b4e3b4111398adbd
SHA1 hash: c90933639f8b8a904117bb2be39a9aa7e8dfb4d7
MD5 hash: 5e54d4660de45c0fa4732d2988ad9f09
humanhash: texas-ack-princess-kitten
File name:5e54d4660de45c0fa4732d2988ad9f09
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:120'832 bytes
First seen:2022-01-11 19:17:53 UTC
Last seen:2022-01-11 21:06:58 UTC
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 3072:bKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgtlyVEdBU6hubsll6UQjvxu:bKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgjP
TLSH T1D5C3CF9AB25E886DEA65873048D743AA7727EC314F2F43872615B3267FFC8904B1351B
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 IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
3110483 bytesWorkbook
OLE vba

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

TypeKeywordDescription
AutoExecAuto_OpenRuns when the Excel Workbook is opened
SuspiciousXLM macroXLM macro found. It may contain malicious code

Intelligence

File Origin
# of uploads :
2
# of downloads :
225
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
5e54d4660de45c0fa4732d2988ad9f09
Verdict:
Malicious activity
Analysis date:
2022-01-11 19:23:39 UTC
Tags:
macros
Link:
https://app.any.run/tasks/a7bdff1e-3bfe-4f44-9a06-a4a9caa9b4bf

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/218306/
Detection(s):
TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.RUNDLL32.EXE.200327.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.BITSADMIN.EXE.200327.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.URLDOWNLOADTOFILE.200415.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.RUNDLL32.EXE.200416.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.Excel4Macro.HiddenSheetDLWAKEUP.20200310.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.Excel4DragoTrainingMontage.20210204.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.XL4MStringFractures.20210921.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.XLSLOLBINHammerToFall.20201218.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.XL4QakyFeaturingNothingNowhere.M2.20210611.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.XL4DataopItWasGoodLivingWithYou.20211109.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DataOpGodGaveRockNRoll2U.20211215.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
DNS request
Creating a window
Сreating synchronization primitives
Creating a file
Creating a process with a hidden window
Launching a process
Moving a recently created file
Sending an HTTP GET request
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/820782b726d21a833928abe4f2873c178d5cdf7a9b5f6665113e0504b8df7c46/results/dashboard
Payload URLs
URL
File name
https://wordpressdes.vanzolini-gte.org.br/fundacaotelefonica.org.br/gAbC4QpJYI/
WorkBook
Document image
Image:
Download PNG
Document image
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/61ddd7ede997359713dd9d79/reports/3ec2cef0-57bc-415b-b1c4-cab758fde196/overview
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/820782b726d21a833928abe4f2873c178d5cdf7a9b5f6665113e0504b8df7c46
Details
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Result
Threat name:
Hidden Macro 4.0
Create hunting rule
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/918607
Signature
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)
Machine Learning detection for dropped file
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
System process connects to network (likely due to code injection or exploit)
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 551104 Sample: ASJ6aJy2iu Startdate: 11/01/2022 Architecture: WINDOWS Score: 100 49 Multi AV Scanner detection for domain / URL 2->49 51 Antivirus detection for URL or domain 2->51 53 Multi AV Scanner detection for submitted file 2->53 55 10 other signatures 2->55 11 EXCEL.EXE 11 18 2->11         started        16 svchost.exe 2->16         started        process3 dnsIp4 43 wordpressdes.vanzolini-gte.org.br 177.170.55.253, 443, 49165 TELEFONICABRASILSABR Brazil 11->43 37 C:\Users\user\sun.ocx, PE32 11->37 dropped 39 C:\Users\user\AppData\...\JK525hV[1].dll, PE32 11->39 dropped 41 C:\Users\user\Desktop\ASJ6aJy2iu.xls, Composite 11->41 dropped 61 Document exploit detected (creates forbidden files) 11->61 63 Document exploit detected (UrlDownloadToFile) 11->63 18 rundll32.exe 11->18         started        file5 signatures6 process7 process8 20 rundll32.exe 2 18->20         started        file9 35 C:\Windows\SysWOW64\...\lnryfplpj.xls (copy), PE32 20->35 dropped 57 Hides that the sample has been downloaded from the Internet (zone.identifier) 20->57 24 rundll32.exe 20->24         started        signatures10 process11 process12 26 rundll32.exe 1 24->26         started        signatures13 59 Hides that the sample has been downloaded from the Internet (zone.identifier) 26->59 29 rundll32.exe 26->29         started        process14 process15 31 rundll32.exe 2 29->31         started        dnsIp16 45 131.100.24.231, 49166, 80 GOPLEXTELECOMUNICACOESEINTERNETLTDA-MEBR Brazil 31->45 47 System process connects to network (likely due to code injection or exploit) 31->47 signatures17
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/820782b726d21a833928abe4f2873c178d5cdf7a9b5f6665113e0504b8df7c46/
Threat name:
Document-Office.Downloader.EncDoc
Create hunting rule
Status:
Malicious
First seen:
2022-01-11 20:12:15 UTC
AV detection:
13 of 43 (30.23%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qidyfnzg2inigojivpspfbz4c6gvzx32tnpwmzirhycqjog7prda._file
Result
Malware family:
emotet
Create hunting rule
Score:
  10/10
Tags:
family:emotet botnet:epoch4 banker macro trojan xlm
Link:
https://tria.ge/reports/220111-xzyeqsggh7/
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
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:
https://wordpressdes.vanzolini-gte.org.br/fundacaotelefonica.org.br/gAbC4QpJYI/
http://shopnhap.com/highbinder/nnYko9FDNJ/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/820782b726d2/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/820782b726d21a833928abe4f2873c178d5cdf7a9b5f6665113e0504b8df7c46

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.

Rule name:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
Rule name:Excel_Hidden_Macro_Sheet
Create hunting rule
Rule name:Qbot
Create hunting rule
Author:Dhanunjaya
Description:Yara Rule to Detect Qbot
Rule name:SUSP_Excel4Macro_AutoOpen
Create hunting rule
Author:John Lambert @JohnLaTwC
Description:Detects Excel4 macro use with auto open / close

File information

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

Web download

SilentBuilder

Excel file xlsx 820782b726d21a833928abe4f2873c178d5cdf7a9b5f6665113e0504b8df7c46

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1968132/
  
URLhaus
https://urlhaus.abuse.ch/url/1967041/
Cape
Cape
https://www.capesandbox.com/analysis/218306/

Comments


Avatar
zbet commented on 2022-01-11 19:17:55 UTC

url : hxxps://nationads.in/wp-content/alTQCMLx3K42V6/?i=1