MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8e1c78a656f1bca32885d67a34776943acfd3ce0bac99cb2f505d8688ef9644e. 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: 7


Intelligence 12 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8e1c78a656f1bca32885d67a34776943acfd3ce0bac99cb2f505d8688ef9644e
SHA3-384 hash: 499ab9eeb218dcf91ee5d1dc3a41233a6c9857a46095cf12e46457409ae19809311a03280db4c3d6f6e0a31658bc5594
SHA1 hash: 117e3bf2aa57ceb08f3c3746a0a559a705d9ffa1
MD5 hash: e515d313126a5cc3dc1be64507b33c39
humanhash: white-item-spaghetti-butter
File name:omicsonline.net_1.xls
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:56'832 bytes
First seen:2022-03-25 16:04:22 UTC
Last seen:2022-03-25 16:07:25 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:ojKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgY5G9XSZAehUXepUNUDpR:+Kpb8rGYrMPe3q7Q0XV5xtezEsi8/dgE
TLSH T1F343F95AFA5A8C5DFA25877548D787A9B322FC144F6B034B3249F3657FF48A05A0320B
Reporter TeamDreier
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
346773 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 :
6
# of downloads :
202
Origin country :
n/a
Vendor Threat Intelligence
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
True
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/257766/
Detection(s):
SecuriteInfo.com.Heur.28531.2292.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.XL4DataopItWasGoodLivingWithYou.20211109.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.Excel4DragoTrainingMontage.20210204.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.XL4MStringFractures.20210921.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOODXL4.HTTP
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOODXL4.HTTPS
Create hunting rule

TwinWave.EvilDoc.XLSLOLBINHammerToFall.20201218.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.XL4QakyFeaturingNothingNowhere.M2.20210611.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DataOpGodGaveRockNRoll2U.20211215.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.XL4QakyFeaturingNothingNowhere.M2.20220215.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Searching for the window
DNS request
Creating a file
Creating a process with a hidden window
Moving a recently created file
Launching a process
Sending an HTTP GET request
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
Link:
https://app.docguard.net/8e1c78a656f1bca32885d67a34776943acfd3ce0bac99cb2f505d8688ef9644e/results/dashboard
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
macros macros-on-open regsvr32 regsvr32.exe
Link:
https://www.filescan.io/uploads/623de8721f204239482a4d7f/reports/da3c67ff-67b9-4c59-86f6-ed793b6a4b75/overview
Label:
Benign
Suspicious Score:
3.9/10
Score Malicious:
39%
Score Benign:
61%
Link:
https://www.malware.ai/gui/files/?id=f4bf0321-bc7d-4a77-8ea0-ed42d059e685
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/8e1c78a656f1bca32885d67a34776943acfd3ce0bac99cb2f505d8688ef9644e
Details
Macro Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
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/964710
Signature
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)
Machine Learning detection for dropped file
Multi AV Scanner detection for submitted file
Office process drops PE file
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Regsvr32 Command Line Without DLL
Sigma detected: Regsvr32 Network Activity
Sigma detected: Suspicious Remote Thread Created
System process connects to network (likely due to code injection or exploit)
Yara detected Emotet
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 597191 Sample: omicsonline.net_1.xls Startdate: 25/03/2022 Architecture: WINDOWS Score: 100 67 Antivirus detection for URL or domain 2->67 69 Multi AV Scanner detection for submitted file 2->69 71 Found malicious Excel 4.0 Macro 2->71 73 11 other signatures 2->73 14 EXCEL.EXE 11 18 2->14         started        19 svchost.exe 2->19         started        process3 dnsIp4 57 code786.com 217.116.232.223, 49167, 80 NGDCDK Denmark 14->57 59 ciberfallas.com 185.118.190.159, 443, 49166 MismeNetTelecomunicacionesES Spain 14->59 61 www.clintmorey.com 69.163.219.239, 443, 49165 DREAMHOST-ASUS United States 14->61 51 C:\Users\user\csei.dll, PE32 14->51 dropped 53 C:\Users\user\AppData\...\9vS7aExw[1].dll, PE32 14->53 dropped 55 C:\Users\user\Desktop\omicsonline.net_1.xls, Composite 14->55 dropped 63 Document exploit detected (creates forbidden files) 14->63 65 Document exploit detected (UrlDownloadToFile) 14->65 21 regsvr32.exe 2 14->21         started        file5 signatures6 process7 file8 49 C:\Windows\...\ltlnmydmqjrpq.ect (copy), PE32 21->49 dropped 79 Hides that the sample has been downloaded from the Internet (zone.identifier) 21->79 25 regsvr32.exe 1 21->25         started        signatures9 process10 signatures11 83 Hides that the sample has been downloaded from the Internet (zone.identifier) 25->83 28 regsvr32.exe 1 25->28         started        process12 signatures13 87 Hides that the sample has been downloaded from the Internet (zone.identifier) 28->87 31 regsvr32.exe 1 28->31         started        process14 signatures15 91 Hides that the sample has been downloaded from the Internet (zone.identifier) 31->91 34 regsvr32.exe 1 31->34         started        process16 signatures17 75 Hides that the sample has been downloaded from the Internet (zone.identifier) 34->75 37 regsvr32.exe 1 34->37         started        process18 signatures19 77 Hides that the sample has been downloaded from the Internet (zone.identifier) 37->77 40 regsvr32.exe 1 37->40         started        process20 signatures21 81 Hides that the sample has been downloaded from the Internet (zone.identifier) 40->81 43 regsvr32.exe 1 40->43         started        process22 signatures23 85 Hides that the sample has been downloaded from the Internet (zone.identifier) 43->85 46 regsvr32.exe 1 43->46         started        process24 signatures25 89 Hides that the sample has been downloaded from the Internet (zone.identifier) 46->89
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8e1c78a656f1bca32885d67a34776943acfd3ce0bac99cb2f505d8688ef9644e/
Threat name:
Document-Excel.Trojan.Emotet
Create hunting rule
Status:
Malicious
First seen:
2022-03-25 16:08:16 UTC
File Type:
Document
Extracted files:
11
AV detection:
9 of 42 (21.43%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ryohrjsw6g6kgkef2z5di53jiowp2phaxlezzmxvaxmgrdxzmrha._file
Result
Malware family:
emotet
Create hunting rule
Score:
  10/10
Tags:
family:emotet botnet:epoch4 banker macro trojan xlm
Link:
https://tria.ge/reports/220325-tjk8pahhc6/
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
Drops file in System32 directory
Loads dropped DLL
Downloads MZ/PE file
Emotet
Process spawned unexpected child process
Malware Config
C2 Extraction:
70.36.102.35:443
92.240.254.110:8080
51.91.76.89:8080
217.182.25.250:8080
119.193.124.41:7080
45.142.114.231:8080
176.56.128.118:443
51.254.140.238:7080
173.212.193.249:8080
131.100.24.231:80
188.44.20.25:443
1.234.2.232:8080
153.126.146.25:7080
51.91.7.5:8080
151.106.112.196:8080
46.55.222.11:443
107.182.225.142:8080
82.165.152.127:8080
212.237.17.99:8080
195.201.151.129:8080
197.242.150.244:8080
103.43.46.182:443
206.188.212.92:8080
196.218.30.83:443
5.9.116.246:8080
185.157.82.211:8080
176.104.106.96:8080
159.65.88.10:8080
212.24.98.99:8080
209.250.246.206:443
45.118.135.203:7080
50.116.54.215:443
178.79.147.66:8080
72.15.201.15:8080
101.50.0.91:8080
103.75.201.2:443
31.24.158.56:8080
146.59.226.45:443
110.232.117.186:8080
138.185.72.26:8080
45.176.232.124:443
189.126.111.200:7080
129.232.188.93:443
158.69.222.101:443
164.68.99.3:8080
209.126.98.206:8080
58.227.42.236:80
203.114.109.124:443
195.154.133.20:443
192.99.251.50:443
1.234.21.73:7080
50.30.40.196:8080
216.158.226.206:443
185.8.212.130:7080
159.8.59.82:8080
45.118.115.99:8080
167.99.115.35:8080
79.172.212.216:8080
Dropper Extraction:
https://www.clintmorey.com/wp-content/QSzbH8Ikl8E/
https://ciberfallas.com/wp-admin/4sU1dATy/
http://code786.com/beeldOLD/ATnNk316/
http://combatenterprises.com/cgi-bin/1BabmNqCKBxUIzUy/
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/8e1c78a656f1bca32885d67a34776943acfd3ce0bac99cb2f505d8688ef9644e

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 8e1c78a656f1bca32885d67a34776943acfd3ce0bac99cb2f505d8688ef9644e

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/257766/

Comments