MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6ca8434af5324f89ebada8515f317f603ebf9218a71c5d778d8a1dd2f279100b. 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

SHA256 hash: 6ca8434af5324f89ebada8515f317f603ebf9218a71c5d778d8a1dd2f279100b
SHA3-384 hash: 94ca4eeccf49b8024064fd786e1693bb2491f973ed20c722cb9b800af5bc3650adeb9553acc623ace2bba137ed21c605
SHA1 hash: 7839d42d779f293a23e7dc88af8e3fde8eccebca
MD5 hash: 3e80be99851045f56907f7be441df09a
humanhash: social-solar-nevada-hamper
File name:3e80be99851045f56907f7be441df09a
Download: download sample
Signature SilentBuilder
File size:120'832 bytes
First seen:2022-01-11 15:36:52 UTC
Last seen:2022-01-11 17:44:38 UTC
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 3072:bKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgtlyVEdBU6hubsll6UQjvxK:bKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgjz
TLSH T190C3CF9AB25E886DEA65873048D743AA7727EC314F2F43872615B3267FFC8904B1351B
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 :
193
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
3e80be99851045f56907f7be441df09a
Verdict:
Malicious activity
Analysis date:
2022-01-11 17:13:13 UTC
Tags:
macros

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
Result
Verdict:
Malware
Maliciousness:

Behaviour
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
Searching for the window
Sending an HTTP GET request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
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
Payload URLs
URL
File name
https://wordpressdes.vanzolini-gte.org.br/fundacaotelefonica.org.br/gAbC4QpJYI/
WorkBook
Document image
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
75%
Tags:
excel.exe macros macros-on-open rundll32 stripped
Result
Verdict:
MALICIOUS
Details
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Result
Threat name:
Hidden Macro 4.0
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
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 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:
Threat name:
Document-Excel.Downloader.EncDoc
Status:
Malicious
First seen:
2022-01-11 15:33:24 UTC
File Type:
Document
Extracted files:
8
AV detection:
15 of 28 (53.57%)
Threat level:
  3/5
Result
Malware family:
Score:
  10/10
Tags:
family:emotet banker macro suricata trojan xlm
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
suricata: ET MALWARE W32/Emotet CnC Beacon 3
Malware Config
Dropper Extraction:
https://wordpressdes.vanzolini-gte.org.br/fundacaotelefonica.org.br/gAbC4QpJYI/
Please note that we are no longer able to provide a coverage score for Virus Total.

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
Rule name:Qbot
Author:Dhanunjaya
Description:Yara Rule to Detect Qbot
Rule name:SUSP_Excel4Macro_AutoOpen
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 6ca8434af5324f89ebada8515f317f603ebf9218a71c5d778d8a1dd2f279100b

(this sample)

Comments



Avatar
zbet commented on 2022-01-11 15:36:53 UTC

url : hxxps://aovtutorial.com/wp-includes/js/Za7pxHC6BQ/?i=1