MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a2e46bd725971c0f4523b843025a290e22e9870fa1808c348a81649410a3e704. 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: 10


Maldoc score: 3


Intelligence 10 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a2e46bd725971c0f4523b843025a290e22e9870fa1808c348a81649410a3e704
SHA3-384 hash: 7741432b9746f5104581ac726d1266e3238a3b1985841ee4529019cee8f8027b40191a268295422a956738c8304e627c
SHA1 hash: eaaae0bcf6987b813911f3401651a2b827b7795d
MD5 hash: 48a1502b0b855b6fe391807b14bbf25b
humanhash: hawaii-twelve-ten-papa
File name:WO_7918166.xlsm
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:120'832 bytes
First seen:2022-01-12 18:42:07 UTC
Last seen:2022-01-12 20:49:23 UTC
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 3072:bKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgMbyVEdBU6hubsll6UQjvxm:bKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgW3
TLSH T10CC3BF9AB25E8869EA65873048D743AA3727EC314F2E43872615B3266FFC8D04B1355B
Reporter Anonymous
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 IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
3110445 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 :
3
# of downloads :
196
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
WO_7918166.xlsm
Verdict:
No threats detected
Analysis date:
2022-01-12 18:43:02 UTC
Tags:
macros
Link:
https://app.any.run/tasks/a096641e-d32e-4cb8-84c7-4378dbdae4e2

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/218783/
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
Сreating synchronization primitives
Creating a window
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Link:
https://app.docguard.net/a2e46bd725971c0f4523b843025a290e22e9870fa1808c348a81649410a3e704/results/dashboard
Payload URLs
URL
File name
http://www.cuneytkocas.com/wp-content/VSnofpES1wO2CcVob/
WorkBook
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
coinminer emotet excel.exe exploit greyware keylogger macros macros-on-open packed print.exe rundll32 shell32.dll stripped
Link:
https://www.filescan.io/uploads/61df21391883c5ba4ec4d125/reports/401d3ad8-b28a-42a8-8f99-95b0dcc019ec/overview
Label:
Malicious
Suspicious Score:
6.6/10
Score Malicious:
67%
Score Benign:
33%
Link:
https://www.malware.ai/gui/files/?id=b165fb60-1969-4daa-b092-c394b37d87a3
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/a2e46bd725971c0f4523b843025a290e22e9870fa1808c348a81649410a3e704
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/919604
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 dropped file
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)
Yara detected hidden Macro 4.0 in Excel
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 552099 Sample: WO_7918166.xlsm Startdate: 12/01/2022 Architecture: WINDOWS Score: 100 44 Multi AV Scanner detection for domain / URL 2->44 46 Antivirus detection for URL or domain 2->46 48 Multi AV Scanner detection for dropped file 2->48 50 12 other signatures 2->50 9 EXCEL.EXE 7 19 2->9         started        14 svchost.exe 2->14         started        process3 dnsIp4 40 cuneytkocas.com 83.150.213.37, 49167, 80 DBT-ASTR Turkey 9->40 42 www.cuneytkocas.com 9->42 30 C:\Users\user\sun.ocx, PE32 9->30 dropped 32 C:\Users\user\AppData\...\BjgK3dYsPAh8[1].dll, PE32 9->32 dropped 34 C:\Users\user\Desktop\~$WO_7918166.xlsm, data 9->34 dropped 36 C:\Users\user\Desktop\WO_7918166.xls, Composite 9->36 dropped 56 Document exploit detected (creates forbidden files) 9->56 58 Document exploit detected (UrlDownloadToFile) 9->58 16 rundll32.exe 9->16         started        file5 signatures6 process7 process8 18 rundll32.exe 2 16->18         started        file9 28 C:\Windows\SysWOW64\...\rgcxwqpfmp.toy (copy), PE32 18->28 dropped 52 Hides that the sample has been downloaded from the Internet (zone.identifier) 18->52 22 rundll32.exe 18->22         started        signatures10 process11 process12 24 rundll32.exe 2 22->24         started        dnsIp13 38 131.100.24.231, 49168, 80 GOPLEXTELECOMUNICACOESEINTERNETLTDA-MEBR Brazil 24->38 54 System process connects to network (likely due to code injection or exploit) 24->54 signatures14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a2e46bd725971c0f4523b843025a290e22e9870fa1808c348a81649410a3e704/
Threat name:
Document-Word.Trojan.Emotet
Create hunting rule
Status:
Malicious
First seen:
2022-01-12 14:07:37 UTC
File Type:
Document
Extracted files:
8
AV detection:
12 of 27 (44.44%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ulsgxvzfs4oa6rjdxbbqewrjbyrotbypugaiynekqfsjiefd44ca._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
macro xlm
Link:
https://tria.ge/reports/220112-xcwydsdfcl/
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
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/a2e46bd72597/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.40
Link:
https://yomi.yoroi.company/submissions/a2e46bd725971c0f4523b843025a290e22e9870fa1808c348a81649410a3e704

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.

  
Delivery method
Distributed via e-mail link
Cape
Cape
https://www.capesandbox.com/analysis/218783/
  
URLhaus
https://urlhaus.abuse.ch/url/1968874/
  
URLhaus
https://urlhaus.abuse.ch/url/1969093/
  
URLhaus
https://urlhaus.abuse.ch/url/1968789/
  
URLhaus
https://urlhaus.abuse.ch/url/1968814/
  
URLhaus
https://urlhaus.abuse.ch/url/1968495/
  
URLhaus
https://urlhaus.abuse.ch/url/1968383/
  
URLhaus
https://urlhaus.abuse.ch/url/1969168/
  
URLhaus
https://urlhaus.abuse.ch/url/1969517/
  
URLhaus
https://urlhaus.abuse.ch/url/1968976/

Comments