MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ea6124225b5b6730fe6559a491eea029863a3b092d174a3aea9010e8b213f32c. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ea6124225b5b6730fe6559a491eea029863a3b092d174a3aea9010e8b213f32c
SHA3-384 hash: 8bb2e37c90f4477bc3c05c92299cd297a96200853fb03ceae02508d9261808cb62b50966d643acef80b386355d1444e6
SHA1 hash: 1dad17510b14790481613cb4a7cf400018cc6199
MD5 hash: 15a2b1bb3ab6bc4f33dc0d2cad534781
humanhash: ten-mockingbird-shade-yankee
File name:15a2b1bb3ab6bc4f33dc0d2cad534781
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:120'832 bytes
First seen:2022-01-11 11:12:55 UTC
Last seen:2022-01-11 12:36:01 UTC
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 3072:bKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgtlyVEdBU6hubsll6UQjvxq:bKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgjT
TLSH T113C3CF9AB25E886DEA65873048D743AA7727EC314F2F43872615B3267FFC8904B1351B
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 :
122
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
15a2b1bb3ab6bc4f33dc0d2cad534781
Verdict:
Malicious activity
Analysis date:
2022-01-11 11:17:02 UTC
Tags:
macros
Link:
https://app.any.run/tasks/f4800b96-31a3-41c7-af26-ef48dcde15e7

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/218181/
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
DNS request
Sending a custom TCP request
Creating a window
Сreating synchronization primitives
Searching for the window
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/ea6124225b5b6730fe6559a491eea029863a3b092d174a3aea9010e8b213f32c/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:
100%
Tags:
anti-debug excel.exe macros macros-on-open packed rundll32 stripped
Link:
https://www.filescan.io/uploads/61dd66431c0d769df9e22164/reports/310f1236-21e3-4cac-ac3c-8ea1a201fcde/overview
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/ea6124225b5b6730fe6559a491eea029863a3b092d174a3aea9010e8b213f32c
Details
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Result
Threat name:
Hidden Macro 4.0 Emotet
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/918281
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
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
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 550762 Sample: 5rAlxuVjLE Startdate: 11/01/2022 Architecture: WINDOWS Score: 100 53 162.214.50.39 UNIFIEDLAYER-AS-1US United States 2->53 55 203.114.109.124 TOT-LLI-AS-APTOTPublicCompanyLimitedTH Thailand 2->55 57 35 other IPs or domains 2->57 65 Found malware configuration 2->65 67 Antivirus detection for URL or domain 2->67 69 Multi AV Scanner detection for submitted file 2->69 71 11 other signatures 2->71 15 EXCEL.EXE 11 18 2->15         started        20 svchost.exe 2->20         started        signatures3 process4 dnsIp5 59 wordpressdes.vanzolini-gte.org.br 177.170.55.253, 443, 49167 TELEFONICABRASILSABR Brazil 15->59 45 C:\Users\user\sun.ocx, PE32 15->45 dropped 47 C:\Users\user\...\kAme6q22tYuSegB46[1].dll, PE32 15->47 dropped 49 C:\Users\user\Desktop\5rAlxuVjLE.xls, Composite 15->49 dropped 61 Document exploit detected (creates forbidden files) 15->61 63 Document exploit detected (UrlDownloadToFile) 15->63 22 rundll32.exe 15->22         started        file6 signatures7 process8 process9 24 rundll32.exe 2 22->24         started        file10 51 C:\Windows\SysWOW64\...\vazttiahjf.pqd (copy), PE32 24->51 dropped 77 Hides that the sample has been downloaded from the Internet (zone.identifier) 24->77 28 rundll32.exe 24->28         started        signatures11 process12 process13 30 rundll32.exe 1 28->30         started        signatures14 79 Hides that the sample has been downloaded from the Internet (zone.identifier) 30->79 33 rundll32.exe 30->33         started        process15 process16 35 rundll32.exe 1 33->35         started        signatures17 73 Hides that the sample has been downloaded from the Internet (zone.identifier) 35->73 38 rundll32.exe 35->38         started        process18 process19 40 rundll32.exe 1 38->40         started        signatures20 75 Hides that the sample has been downloaded from the Internet (zone.identifier) 40->75 43 rundll32.exe 40->43         started        process21
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ea6124225b5b6730fe6559a491eea029863a3b092d174a3aea9010e8b213f32c/
Threat name:
Document-Office.Downloader.EncDoc
Create hunting rule
Status:
Malicious
First seen:
2022-01-11 11:13:09 UTC
File Type:
Document
Extracted files:
8
AV detection:
14 of 43 (32.56%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=5jqsiis3lnttb7tflgsjd3vafgdduoyjfuluuoxksaiormqt6mwa._file
Result
Malware family:
emotet
Create hunting rule
Score:
  10/10
Tags:
family:emotet banker macro suricata trojan xlm
Link:
https://tria.ge/reports/220111-nbehaaffbm/
Behaviour
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
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
suricata: ET MALWARE W32/Emotet CnC Beacon 3
Malware Config
Dropper Extraction:
https://wordpressdes.vanzolini-gte.org.br/fundacaotelefonica.org.br/gAbC4QpJYI/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/ea6124225b5b/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/ea6124225b5b6730fe6559a491eea029863a3b092d174a3aea9010e8b213f32c

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: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 ea6124225b5b6730fe6559a491eea029863a3b092d174a3aea9010e8b213f32c

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1965041/
  
URLhaus
https://urlhaus.abuse.ch/url/1965080/
Cape
Cape
https://www.capesandbox.com/analysis/218181/

Comments


Avatar
zbet commented on 2022-01-11 11:12:57 UTC

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