MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7443d5335a207cca176825bd774a412e72882c815206c7f59ace1feb111bb4e9. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7443d5335a207cca176825bd774a412e72882c815206c7f59ace1feb111bb4e9
SHA3-384 hash: bc3a86ed4a1caa1de6a6f5daf5a8350309a880308a14f0378b56aa440c0d09ea74c07e149fc0901b137503fabe348ad9
SHA1 hash: 50ca3dc590956809332b5b878c0ff213d81440a1
MD5 hash: 20759385064298185538fe8560b6dd18
humanhash: butter-quebec-delaware-winter
File name:emoagain.xls
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:115'712 bytes
First seen:2022-01-11 12:12:19 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 3072:yKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgQCyVEdBU6hubsll6UQjvxm:yKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgbr
TLSH T14AB3CF9AB21E886DEA658B3058D7439A7727EC314F6F43872615B3227FBC8D04B1350B
Reporter ankit_anubhav
Tags:Emotet SilentBuilder xls

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
3105003 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 :
150
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
emoagain.xls
Verdict:
Malicious activity
Analysis date:
2022-01-11 12:24:52 UTC
Tags:
macros loader
Link:
https://app.any.run/tasks/29dfd6d8-5d41-4558-b62e-5f86bd95ce76

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
False
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/218201/
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
Sending a custom TCP request
Creating a process with a hidden window
Launching a process
Moving a recently created file
Sending an HTTP GET request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Link:
https://app.docguard.net/7443d5335a207cca176825bd774a412e72882c815206c7f59ace1feb111bb4e9/results/dashboard
Payload URLs
URL
File name
http://gaidov.bg/wp-includes/Ug/
WorkBook
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
60%
Tags:
coinminer excel.exe macros macros-on-open print.exe rundll32 stripped
Link:
https://www.filescan.io/uploads/61dd74511c0d769df9e25de1/reports/cd1039e0-97e7-4481-bcf4-f116c6aa3ef6/overview
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/7443d5335a207cca176825bd774a412e72882c815206c7f59ace1feb111bb4e9
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/918307
Signature
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 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)
Yara detected Emotet
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 550785 Sample: emoagain.xls Startdate: 11/01/2022 Architecture: WINDOWS Score: 100 51 162.214.50.39 UNIFIEDLAYER-AS-1US United States 2->51 53 203.114.109.124 TOT-LLI-AS-APTOTPublicCompanyLimitedTH Thailand 2->53 55 34 other IPs or domains 2->55 67 Multi AV Scanner detection for domain / URL 2->67 69 Found malware configuration 2->69 71 Multi AV Scanner detection for submitted file 2->71 73 11 other signatures 2->73 14 EXCEL.EXE 7 18 2->14         started        19 svchost.exe 2->19         started        signatures3 process4 dnsIp5 59 gaidov.bg 78.128.43.182, 49167, 80 TELEPOINTBG Bulgaria 14->59 45 C:\Users\user\sun.ocx, PE32 14->45 dropped 47 C:\Users\user\AppData\...\yukIEtklbTHH[1].dll, PE32 14->47 dropped 49 C:\Users\user\Desktop\emoagain.xls, Composite 14->49 dropped 61 Document exploit detected (creates forbidden files) 14->61 63 Document exploit detected (UrlDownloadToFile) 14->63 21 rundll32.exe 14->21         started        file6 signatures7 process8 process9 23 rundll32.exe 2 21->23         started        file10 43 C:\Windows\...\xquemzuiovfz.zmy (copy), PE32 23->43 dropped 75 Hides that the sample has been downloaded from the Internet (zone.identifier) 23->75 27 rundll32.exe 23->27         started        signatures11 process12 process13 29 rundll32.exe 1 27->29         started        signatures14 79 Hides that the sample has been downloaded from the Internet (zone.identifier) 29->79 32 rundll32.exe 29->32         started        process15 process16 34 rundll32.exe 1 32->34         started        signatures17 65 Hides that the sample has been downloaded from the Internet (zone.identifier) 34->65 37 rundll32.exe 34->37         started        process18 process19 39 rundll32.exe 2 37->39         started        dnsIp20 57 131.100.24.231, 49169, 80 GOPLEXTELECOMUNICACOESEINTERNETLTDA-MEBR Brazil 39->57 77 System process connects to network (likely due to code injection or exploit) 39->77 signatures21
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/7443d5335a207cca176825bd774a412e72882c815206c7f59ace1feb111bb4e9/
Threat name:
Document-Excel.Trojan.Nastya
Create hunting rule
Status:
Malicious
First seen:
2022-01-11 12:13:09 UTC
File Type:
Document
Extracted files:
8
AV detection:
5 of 42 (11.90%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=orb5km22eb6muf3iew6xossbfzziqlebkidmp5m2zyp6wei3wtuq._file
Result
Malware family:
emotet
Create hunting rule
Score:
  10/10
Tags:
family:emotet banker macro trojan xlm
Link:
https://tria.ge/reports/220111-pdrfasfef6/
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://gaidov.bg/wp-includes/Ug/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/7443d5335a20/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/7443d5335a207cca176825bd774a412e72882c815206c7f59ace1feb111bb4e9

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.

Malspam

SilentBuilder

Excel file xls 7443d5335a207cca176825bd774a412e72882c815206c7f59ace1feb111bb4e9

(this sample)

  
Delivery method
Distributed via e-mail attachment
  
URLhaus
https://urlhaus.abuse.ch/url/1964673/
  
URLhaus
https://urlhaus.abuse.ch/url/1964802/
  
URLhaus
https://urlhaus.abuse.ch/url/1964733/
Cape
Cape
https://www.capesandbox.com/analysis/218201/

Comments