MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f88fe02c1d4eeaf522b088ab279cda70ba1a531f33fd4af6e5afa3c96c5b7b05. 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: 12


Intelligence 12 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f88fe02c1d4eeaf522b088ab279cda70ba1a531f33fd4af6e5afa3c96c5b7b05
SHA3-384 hash: 7c391b4c0bb63e93f0b430d5571f31dd32fbf5bb8536d6d1a87018d40c2a30611545a5385bac911b6102c116033c9cb0
SHA1 hash: c5b09ee54eacf54d673f02adc777cd3b5b5551fa
MD5 hash: 3e513cafcaeaf93df03c2357f831d4e2
humanhash: winter-nuts-north-jersey
File name:NOTICE-278828.xls
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:97'792 bytes
First seen:2022-07-13 11:12:21 UTC
Last seen:2022-07-13 12:14:55 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:UkKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgNHuS4hcTO97v7UYdEJmN:bKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgY
TLSH T1EBA33A45B799DA1EF625833149E787A67333FC204F6B47472224B3266FB99E04B0721A
TrID 80.2% (.XLS) Microsoft Excel sheet (32500/1/3)
19.7% (.) Generic OLE2 / Multistream Compound (8000/1)
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: 12
OLE dump

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

Section IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
387354 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
Hex StringSegWT5365675754
Hex StringScEB53634542
Hex String5cF535634635
Hex StringcV4dR6356346452
Hex StringWceR57636552
SuspiciousWindowsMay enumerate application windows (if combined with Shell.Application object)
SuspiciousURLDownloadToFileAMay download files from the Internet
SuspiciousEXECMay run an executable file or a system
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 :
2
# of downloads :
266
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/287002/
Detection(s):
Sanesecurity.Badmacro.Xls.encdl.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.URLDOWNLOADTOFILE.200415.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.SHELLEXECUTE.200416.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.SHELLEXECUTE.200524.UNOFFICIAL
Create hunting rule

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

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

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

TwinWave.EvilDoc.XL4DataopItWasGoodLivingWithYou.20211109.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
Searching for the window
Sending a custom TCP request
Creating a window
Сreating synchronization primitives
DNS request
Creating a file
Creating a process with a hidden window
Launching a process
Moving a recently created file
Query of malicious DNS domain
Sending an HTTP GET request
Sending a TCP request to an infection source 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/f88fe02c1d4eeaf522b088ab279cda70ba1a531f33fd4af6e5afa3c96c5b7b05/results/dashboard
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
greyware macros macros-on-open packed regsvr32
Link:
https://www.filescan.io/uploads/62cea93183ba16fee5c244d6/reports/f4cdfed4-cf4c-4080-8587-03f8e898cc60/overview
Label:
Benign
Suspicious Score:
3.8/10
Score Malicious:
38%
Score Benign:
62%
Link:
https://www.malware.ai/gui/files/?id=2288d268-f889-4933-b377-43f1b6f5b457
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/f88fe02c1d4eeaf522b088ab279cda70ba1a531f33fd4af6e5afa3c96c5b7b05
Details
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/1030123
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
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 document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Office process drops PE file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
System process connects to network (likely due to code injection or exploit)
Uses ipconfig to lookup or modify the Windows network settings
Yara detected Emotet
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 662624 Sample: NOTICE-278828.xls Startdate: 13/07/2022 Architecture: WINDOWS Score: 100 59 103.224.241.74 WEBWERKS-AS-INWebWerksIndiaPvtLtdIN India 2->59 61 202.29.239.162 UNINET-AS-APUNINET-TH Thailand 2->61 63 45 other IPs or domains 2->63 81 Multi AV Scanner detection for domain / URL 2->81 83 Antivirus detection for URL or domain 2->83 85 Multi AV Scanner detection for dropped file 2->85 87 10 other signatures 2->87 9 EXCEL.EXE 7 26 2->9         started        14 svchost.exe 2->14         started        signatures3 process4 dnsIp5 65 3dstudioa.com.br 189.45.192.54, 49175, 80 UnifiqueTelecomunicacoesSABR Brazil 9->65 67 ebuysa.co.za 129.232.138.114, 49174, 80 xneeloZA South Africa 9->67 69 3 other IPs or domains 9->69 51 C:\Users\user\soci4.ocx, PE32+ 9->51 dropped 53 C:\Users\user\soci3.ocx, PE32+ 9->53 dropped 55 C:\Users\user\soci2.ocx, PE32+ 9->55 dropped 57 6 other malicious files 9->57 dropped 93 Document exploit detected (creates forbidden files) 9->93 95 Document exploit detected (UrlDownloadToFile) 9->95 16 regsvr32.exe 2 9->16         started        20 regsvr32.exe 2 9->20         started        22 regsvr32.exe 2 9->22         started        24 regsvr32.exe 2 9->24         started        file6 signatures7 process8 file9 43 C:\Windows\...\BLApFvCchbJXJnI.dll (copy), PE32+ 16->43 dropped 77 Hides that the sample has been downloaded from the Internet (zone.identifier) 16->77 26 regsvr32.exe 14 16->26         started        45 C:\Windows\...\ajdFRjQqjRX.dll (copy), PE32+ 20->45 dropped 79 Uses ipconfig to lookup or modify the Windows network settings 20->79 30 regsvr32.exe 2 20->30         started        47 C:\Windows\...\xPRFjIphZQFYH.dll (copy), PE32+ 22->47 dropped 32 regsvr32.exe 22->32         started        49 C:\Windows\System32\...\cDxhibFc.dll (copy), PE32+ 24->49 dropped 34 regsvr32.exe 24->34         started        signatures10 process11 dnsIp12 71 203.217.140.239, 49184, 8080 UT-AS-IDUniversitasTerbukaID Indonesia 26->71 73 198.27.67.35, 49181, 49182, 8080 OVHFR Canada 26->73 97 System process connects to network (likely due to code injection or exploit) 26->97 36 systeminfo.exe 26->36         started        39 ipconfig.exe 26->39         started        41 nltest.exe 26->41         started        75 174.138.33.49, 49177, 49179, 49180 DIGITALOCEAN-ASNUS United States 30->75 signatures13 process14 signatures15 89 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 36->89 91 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 36->91
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f88fe02c1d4eeaf522b088ab279cda70ba1a531f33fd4af6e5afa3c96c5b7b05/
Threat name:
Document-Excel.Trojan.Abracadabra
Create hunting rule
Status:
Malicious
First seen:
2022-07-12 01:34:34 UTC
File Type:
Document
Extracted files:
11
AV detection:
22 of 41 (53.66%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7ch6ala5j3vpkivqrcvsphg2oc5buuy7gp6uv5xfv6r4s3c3pmcq._file
Result
Malware family:
emotet
Create hunting rule
Score:
  10/10
Tags:
family:emotet botnet:epoch5 banker macro suricata trojan xlm
Link:
https://tria.ge/reports/220713-nbes2sddcl/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Gathers network information
Gathers system information
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
C2 Extraction:
103.71.99.57:8080
103.224.241.74:8080
157.245.111.0:8080
37.44.244.177:8080
103.41.204.169:8080
64.227.55.231:8080
103.254.12.236:7080
103.85.95.4:8080
157.230.99.206:8080
165.22.254.236:8080
85.214.67.203:8080
54.37.228.122:443
195.77.239.39:8080
128.199.217.206:443
190.145.8.4:443
165.232.185.110:8080
188.165.79.151:443
178.62.112.199:8080
54.37.106.167:8080
104.244.79.94:443
43.129.209.178:443
87.106.97.83:7080
202.134.4.210:7080
178.238.225.252:8080
198.199.70.22:8080
62.171.178.147:8080
175.126.176.79:8080
128.199.242.164:8080
88.217.172.165:8080
104.248.225.227:8080
85.25.120.45:8080
139.196.72.155:8080
188.225.32.231:4143
202.29.239.162:443
103.126.216.86:443
210.57.209.142:8080
93.104.209.107:8080
196.44.98.190:8080
5.253.30.17:7080
46.101.98.60:8080
103.56.149.105:8080
190.107.19.179:443
139.59.80.108:8080
36.67.23.59:443
78.47.204.80:443
83.229.80.93:8080
174.138.33.49:7080
118.98.72.86:443
37.187.114.15:8080
202.28.34.99:8080
198.27.67.35:8080
190.107.19.180:8080
58.96.74.42:443
116.125.120.88:443
180.250.21.2:443
165.227.153.100:8080
62.141.45.103:443
134.209.164.181:8080
212.98.224.97:8080
159.65.163.220:443
128.199.93.156:7080
198.211.118.165:443
203.217.140.239:8080
Dropper Extraction:
https://fikti.bem.gunadarma.ac.id/SDM/YH8OJ1Zz8miBX/
http://ebuysa.co.za/yt-assets/yZ30/
http://3dstudioa.com.br/files/1ubPAB/
http://boardmart.co.za/images/DvMHPbTLn/
Malware family:
Emotet
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/f88fe02c1d4e/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/f88fe02c1d4eeaf522b088ab279cda70ba1a531f33fd4af6e5afa3c96c5b7b05

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: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 f88fe02c1d4eeaf522b088ab279cda70ba1a531f33fd4af6e5afa3c96c5b7b05

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/287002/

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