MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fd9f32d79ea98273f97ea6c36042a4f43ee66720751a3e650eaa6f3f5e2dcbd1. 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: fd9f32d79ea98273f97ea6c36042a4f43ee66720751a3e650eaa6f3f5e2dcbd1
SHA3-384 hash: 8e41efd02cff581269b7554fda6701e5211e7c4613c24e5f2bd1cf61e7a7ba945f18428e6f70b626acdf3a97e8900755
SHA1 hash: 3ea70a383653b80aece66b6ddff4aec51d128eb0
MD5 hash: a9d2bcd6bcfd2621848a45a0e9cfc08d
humanhash: failed-mockingbird-papa-nitrogen
File name:a9d2bcd6bcfd2621848a45a0e9cfc08d
Download: download sample
Signature SilentBuilder
File size:115'712 bytes
First seen:2022-01-11 10:23:32 UTC
Last seen:Never
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 3072:yKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgQCyVEdBU6hubsll6UQjvxm:yKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgbr
TLSH T12BB3CF9AB21E886DEA658B3058D7439A7727EC314F6F43872615B3227FBC8D04B1350B
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
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 :
132
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a9d2bcd6bcfd2621848a45a0e9cfc08d
Verdict:
Malicious activity
Analysis date:
2022-01-11 10:50:02 UTC
Tags:
macros loader

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
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
Sending an HTTP GET request
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Payload URLs
URL
File name
http://gaidov.bg/wp-includes/Ug/
WorkBook
Document image
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
60%
Tags:
coinminer excel.exe macros macros-on-open print.exe 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 Emotet
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
Antivirus detection for dropped file
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
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
Tries to detect virtualization through RDTSC time measurements
Yara detected Emotet
Behaviour
Behavior Graph:
Threat name:
Document-Excel.Trojan.Nastya
Status:
Malicious
First seen:
2022-01-11 10:24:09 UTC
File Type:
Document
Extracted files:
8
AV detection:
5 of 43 (11.63%)
Threat level:
  5/5
Result
Malware family:
Score:
  10/10
Tags:
family:emotet botnet:epoch4 banker macro trojan xlm
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
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in System32 directory
Loads dropped DLL
Downloads MZ/PE file
Emotet
Process spawned unexpected child process
Malware Config
C2 Extraction:
131.100.24.231:80
209.59.138.75:7080
103.8.26.102:8080
178.79.147.66:8080
51.38.71.0:443
79.172.212.216:8080
162.214.50.39:7080
203.114.109.124:443
45.142.114.231:8080
212.237.5.209:443
104.251.214.46:8080
212.237.56.116:7080
107.182.225.142:8080
104.168.155.129:8080
138.185.72.26:8080
45.118.135.203:7080
216.158.226.206:443
103.75.201.2:443
158.69.222.101:443
178.63.25.185:443
45.118.115.99:8080
46.55.222.11:443
192.254.71.210:443
217.182.143.207:443
110.232.117.186:8080
81.0.236.90:443
176.104.106.96:8080
103.8.26.103:8080
50.116.54.215:443
195.154.133.20:443
51.68.175.8:8080
58.227.42.236:80
173.212.193.249:8080
212.237.17.99:8080
41.76.108.46:8080
45.176.232.124:443
207.38.84.195:8080
Dropper Extraction:
http://gaidov.bg/wp-includes/Ug/
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 fd9f32d79ea98273f97ea6c36042a4f43ee66720751a3e650eaa6f3f5e2dcbd1

(this sample)

  
Delivery method
Distributed via web download

Comments



Avatar
zbet commented on 2022-01-11 10:23:33 UTC

url : hxxp://o2omart.co.in/infructuose/vlkIcu2LQ0/?i=1