MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 902afb7f03df7e3f3edd6d2d4caa7a2ec9530afd4f2a720d9fe66a89b30b5970. 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 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 902afb7f03df7e3f3edd6d2d4caa7a2ec9530afd4f2a720d9fe66a89b30b5970
SHA3-384 hash: ac9debcdb83126e7234b49396a796b2981773fe489240d6d9fa28b90e95283db7f7497aa0b680861bdbea3961b12ce74
SHA1 hash: 3424ea99c716db59e7056c7001a48a653b2a993e
MD5 hash: f3cacbccc54276e46353875c4cf999b2
humanhash: oklahoma-bakerloo-lemon-asparagus
File name:f3cacbccc54276e46353875c4cf999b2
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:109'056 bytes
First seen:2022-03-29 17:01:07 UTC
Last seen:Never
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 3072:jsKpbdrHYrMue8q7QPX+5xtekEdi8/dg+tgSmsCpH/KZuAZGsMt:YKpbdrHYrMue8q7QPX+5xtFEdi8/dgw4
TLSH T186B39D4BB669D459E923477988EB475A7327FC341F9A47836354F3292FB8CE05A0320B
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: 7
OLE dump

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

Section IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
398511 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 :
217
Origin country :
n/a
Vendor Threat Intelligence
Verdict:
Malicious
File type:
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Has a screenshot:
False
Contains macros:
True
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/259361/
Detection(s):
SecuriteInfo.com.Macro.Downlader-14.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Macro.Downloader-15.UNOFFICIAL
Create hunting rule

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

Sanesecurity.Badmacro.Xls.Araexe.UNOFFICIAL
Create hunting rule

Sanesecurity.Badmacro.Xls.Hidehtt.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.EmotetNoticePicturesOfU.MSOLE2.220314.UNOFFICIAL
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

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
DNS request
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Link:
https://app.docguard.net/902afb7f03df7e3f3edd6d2d4caa7a2ec9530afd4f2a720d9fe66a89b30b5970/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/62433b909253b276b79dd6ad/reports/711a5ff5-5646-4f3e-94bf-326e59c90154/overview
Label:
Benign
Suspicious Score:
3.8/10
Score Malicious:
39%
Score Benign:
61%
Link:
https://www.malware.ai/gui/files/?id=fcedc758-e039-4ea9-9bf3-8b1a28ce12a2
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/902afb7f03df7e3f3edd6d2d4caa7a2ec9530afd4f2a720d9fe66a89b30b5970
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/966939
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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)
Machine Learning detection for dropped file
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
Sigma detected: Regsvr32 Command Line Without DLL
Sigma detected: Regsvr32 Network Activity
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: 599445 Sample: Tl8WjhGfDa Startdate: 29/03/2022 Architecture: WINDOWS Score: 100 31 129.232.188.93 xneeloZA South Africa 2->31 33 189.232.46.161 UninetSAdeCVMX Mexico 2->33 35 57 other IPs or domains 2->35 43 Multi AV Scanner detection for domain / URL 2->43 45 Found malware configuration 2->45 47 Antivirus detection for URL or domain 2->47 49 14 other signatures 2->49 8 EXCEL.EXE 7 18 2->8         started        signatures3 process4 dnsIp5 37 fccatinsaat.com 204.11.59.91, 49165, 80 PUBLIC-DOMAIN-REGISTRYUS United States 8->37 39 fabulouswebdesign.net 66.63.190.148, 49166, 80 ASN-QUADRANET-GLOBALUS United States 8->39 21 C:\Users\user\nhth.dll, PE32 8->21 dropped 23 C:\Users\...\IdAC4b9X5SQYlNgvR40eAiaDF[1].dll, PE32 8->23 dropped 25 C:\Users\user\Desktop\Tl8WjhGfDa.xls, Composite 8->25 dropped 51 Document exploit detected (creates forbidden files) 8->51 53 Document exploit detected (UrlDownloadToFile) 8->53 13 regsvr32.exe 2 8->13         started        file6 signatures7 process8 file9 27 C:\Windows\...\ayiblseimpf.tjt (copy), PE32 13->27 dropped 55 Hides that the sample has been downloaded from the Internet (zone.identifier) 13->55 17 regsvr32.exe 13->17         started        signatures10 process11 dnsIp12 29 45.176.232.125, 443, 49167 CABLEYTELECOMUNICACIONESDECOLOMBIASASCABLETELCOC Colombia 17->29 41 System process connects to network (likely due to code injection or exploit) 17->41 signatures13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/902afb7f03df7e3f3edd6d2d4caa7a2ec9530afd4f2a720d9fe66a89b30b5970/
Threat name:
Document-Excel.Trojan.Emotet
Create hunting rule
Status:
Malicious
First seen:
2022-03-29 17:02:05 UTC
File Type:
Document
Extracted files:
11
AV detection:
8 of 41 (19.51%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=savpw7yd357d6pw5nuwuzkt2f3evgcx5j4vhedm74zvitmyllfya._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/220329-vj39yagfc9/
Behaviour
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Drops file in System32 directory
Loads dropped DLL
Downloads MZ/PE file
Emotet
Process spawned unexpected child process
Malware Config
C2 Extraction:
45.176.232.125:443
138.197.109.175:8080
187.84.80.182:443
79.143.187.147:443
189.232.46.161:443
103.70.28.102:8080
134.122.66.193:8080
151.106.112.196:8080
160.16.142.56:8080
212.24.98.99:8080
188.44.20.25:443
197.242.150.244:8080
206.189.28.199:8080
172.104.251.154:8080
103.43.46.182:443
203.114.109.124:443
103.75.201.2:443
58.227.42.236:80
201.94.166.162:443
189.126.111.200:7080
185.8.212.130:7080
167.99.115.35:8080
129.232.188.93:443
1.234.2.232:8080
153.126.146.25:7080
185.157.82.211:8080
131.100.24.231:80
1.234.21.73:7080
192.99.251.50:443
119.193.124.41:7080
159.8.59.82:8080
158.69.222.101:443
51.254.140.238:7080
5.9.116.246:8080
45.176.232.124:443
159.65.88.10:8080
101.50.0.91:8080
107.182.225.142:8080
167.172.253.162:8080
79.172.212.216:8080
50.30.40.196:8080
196.218.30.83:443
51.91.7.5:8080
212.237.17.99:8080
72.15.201.15:8080
183.111.227.137:8080
51.91.76.89:8080
209.250.246.206:443
176.104.106.96:8080
46.55.222.11:443
209.126.98.206:8080
164.68.99.3:8080
176.56.128.118:443
103.132.242.26:8080
110.232.117.186:8080
146.59.226.45:443
173.212.193.249:8080
82.165.152.127:8080
45.118.115.99:8080
216.158.226.206:443
159.203.141.156:8080
195.154.133.20:443
195.201.151.129:8080
31.24.158.56:8080
45.142.114.231:8080
45.118.135.203:7080
178.79.147.66:8080
50.116.54.215:443
Dropper Extraction:
http://fccatinsaat.com/wp-content/Cw3aR6792f/
http://fabulouswebdesign.net/invoice/m/
Malware family:
Emotet
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/902afb7f03df/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/902afb7f03df7e3f3edd6d2d4caa7a2ec9530afd4f2a720d9fe66a89b30b5970

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.

Web download

SilentBuilder

Excel file xlsx 902afb7f03df7e3f3edd6d2d4caa7a2ec9530afd4f2a720d9fe66a89b30b5970

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2118001/
  
URLhaus
https://urlhaus.abuse.ch/url/2120072/
  
URLhaus
https://urlhaus.abuse.ch/url/2120075/
Cape
Cape
https://www.capesandbox.com/analysis/259361/

Comments


Avatar
zbet commented on 2022-03-29 17:01:09 UTC

url : hxxps://www.etoileinfosolutions.com/blog/tAzGJKMlfAVHTwsgrr/?i=1