MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b01774a8742815f71bc8d831f20316f583f951b0e1273320b16e6e6533f4fc44. 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: 13


Maldoc score: 7


Intelligence 13 IOCs YARA 3 File information Comments

SHA256 hash: b01774a8742815f71bc8d831f20316f583f951b0e1273320b16e6e6533f4fc44
SHA3-384 hash: bec4e18d9a569a551d2bf7f836817f693f1c88c437fa6617e857bc8e23c1f93f988483808237f1ac1afb63396105f8cd
SHA1 hash: b5d8e762032e52de1b500f485ec0d94c9d17a7a4
MD5 hash: 382eff9de352ddac4ba574f868e5103f
humanhash: sierra-cola-foxtrot-papa
File name:Fattura 4378.xls
Download: download sample
Signature SilentBuilder
File size:80'384 bytes
First seen:2022-05-13 09:28:07 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:oHKpb8rGYrMPe3q7Q0XV5xtezEsi8/dg6dXTZhqEw+PmwEJ8zobcG13GW8eJwVUv:YKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgL
TLSH T128735C45BA5D9C5DE522873548D6839AE223FC116FAB0B473245F365BFF4AE08B0360B
TrID 80.2% (.XLS) Microsoft Excel sheet (32500/1/3)
19.7% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter JAMESWT_WT
Tags: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: 7
OLE dump

MalwareBazaar was able to identify 3 sections in this file using oledump:

Section IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
370043 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
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousXLM macroXLM macro found. It may contain malicious code

Intelligence


File Origin
# of uploads :
1
# of downloads :
282
Origin country :
n/a
Vendor Threat Intelligence
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
True
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Sending a custom TCP request
Creating a window
Сreating synchronization primitives
DNS request
Creating a file
Sending an HTTP GET request
Sending a custom TCP request by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Document image
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
emotet greyware macros macros-on-open packed regsvr32
Label:
Malicious
Suspicious Score:
5.6/10
Score Malicious:
57%
Score Benign:
43%
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 / Scanner detection for submitted sample
Antivirus detection for URL or domain
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)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office process drops PE file
System process connects to network (likely due to code injection or exploit)
Behaviour
Behavior Graph:
Threat name:
Document-Excel.Trojan.Emotet
Status:
Malicious
First seen:
2022-05-13 09:29:06 UTC
File Type:
Document
Extracted files:
9
AV detection:
17 of 26 (65.38%)
Threat level:
  5/5
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
Loads dropped DLL
Downloads MZ/PE file
Emotet
Process spawned unexpected child process
suricata: ET MALWARE W32/Emotet CnC Beacon 3
Malware Config
Dropper Extraction:
https://immobilgolfo.it/cgi-bin/Uf/
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.

Comments