MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 11bae3f8e7b3c098abc037e0f0aed4013cf4b393f39aa9ea5e89b47360f87d73. 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: 11bae3f8e7b3c098abc037e0f0aed4013cf4b393f39aa9ea5e89b47360f87d73
SHA3-384 hash: a1d461cdf22c2e45b1e2243fcf68df1978f404690b14312d50da805012f0aa0057d56e53d7ad14f2bc396f5550db51f4
SHA1 hash: a8cc11fc6fa6b07ce7fa81b695d44f3bddb10256
MD5 hash: c46d38c0d5b70eccad8f7441a44f0ed5
humanhash: romeo-earth-seven-massachusetts
File name:c46d38c0d5b70eccad8f7441a44f0ed5
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:120'832 bytes
First seen:2022-01-11 22:54:32 UTC
Last seen:Never
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 3072:bKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgMbyVEdBU6hubsll6UQjvxm:bKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgW3
TLSH T17EC3BF9AB25E8869EA65873048D743AA3727EC314F2E43872615B3266FFC8D04B1355B
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
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 :
1
# of downloads :
228
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c46d38c0d5b70eccad8f7441a44f0ed5
Verdict:
Malicious activity
Analysis date:
2022-01-11 23:00:13 UTC
Tags:
macros loader
Link:
https://app.any.run/tasks/1734da99-2b53-4f9d-a976-b59810ae86be

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/218389/
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
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Link:
https://app.docguard.net/11bae3f8e7b3c098abc037e0f0aed4013cf4b393f39aa9ea5e89b47360f87d73/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 greyware keylogger macros macros-on-open packed print.exe rundll32 shell32.dll stripped
Link:
https://www.filescan.io/uploads/61de0ac8e997359713ddfa6d/reports/09a128b7-c1e5-4e66-a60e-154bd5347d46/overview
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/11bae3f8e7b3c098abc037e0f0aed4013cf4b393f39aa9ea5e89b47360f87d73
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/918783
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: 551261 Sample: oobwFhKIkS Startdate: 12/01/2022 Architecture: WINDOWS Score: 100 58 Multi AV Scanner detection for domain / URL 2->58 60 Antivirus detection for URL or domain 2->60 62 Multi AV Scanner detection for submitted file 2->62 64 10 other signatures 2->64 13 EXCEL.EXE 7 18 2->13         started        18 svchost.exe 2->18         started        process3 dnsIp4 52 cuneytkocas.com 83.150.213.37, 49165, 80 DBT-ASTR Turkey 13->52 54 www.cuneytkocas.com 13->54 44 C:\Users\user\sun.ocx, PE32 13->44 dropped 46 C:\Users\user\AppData\Local\...Rh[1].dll, PE32 13->46 dropped 48 C:\Users\user\Desktop\oobwFhKIkS.xls, Composite 13->48 dropped 72 Document exploit detected (creates forbidden files) 13->72 74 Document exploit detected (UrlDownloadToFile) 13->74 20 rundll32.exe 13->20         started        file5 signatures6 process7 process8 22 rundll32.exe 2 20->22         started        file9 42 C:\Windows\SysWOW64\...\aezbqu.qwr (copy), PE32 22->42 dropped 66 Hides that the sample has been downloaded from the Internet (zone.identifier) 22->66 26 rundll32.exe 22->26         started        signatures10 process11 process12 28 rundll32.exe 1 26->28         started        signatures13 70 Hides that the sample has been downloaded from the Internet (zone.identifier) 28->70 31 rundll32.exe 28->31         started        process14 process15 33 rundll32.exe 1 31->33         started        signatures16 56 Hides that the sample has been downloaded from the Internet (zone.identifier) 33->56 36 rundll32.exe 33->36         started        process17 process18 38 rundll32.exe 2 36->38         started        dnsIp19 50 131.100.24.231, 49166, 80 GOPLEXTELECOMUNICACOESEINTERNETLTDA-MEBR Brazil 38->50 68 System process connects to network (likely due to code injection or exploit) 38->68 signatures20
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/11bae3f8e7b3c098abc037e0f0aed4013cf4b393f39aa9ea5e89b47360f87d73/
Threat name:
Document-Excel.Trojan.Emotet
Create hunting rule
Status:
Malicious
First seen:
2022-01-11 22:55:11 UTC
File Type:
Document
Extracted files:
8
AV detection:
16 of 27 (59.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=cg5oh6hhwpajrk6ag7qpblwuae6pjm4t6onkt2s6rg2hgyhypvzq._file
Result
Malware family:
emotet
Create hunting rule
Score:
  10/10
Tags:
family:emotet banker macro trojan xlm
Link:
https://tria.ge/reports/220111-2v4heahha6/
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:
http://www.cuneytkocas.com/wp-content/VSnofpES1wO2CcVob/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/11bae3f8e7b3/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/11bae3f8e7b3c098abc037e0f0aed4013cf4b393f39aa9ea5e89b47360f87d73

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 11bae3f8e7b3c098abc037e0f0aed4013cf4b393f39aa9ea5e89b47360f87d73

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/218389/
  
URLhaus
https://urlhaus.abuse.ch/url/1967650/

Comments


Avatar
zbet commented on 2022-01-11 22:54:34 UTC

url : hxxp://direct.credit-suisse.com.juckzgames.com.br/cgi-bin/1bBmzUpvJQ67rH/?i=1