MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f8eaa9c55d6901d69a13b07cbaee13695f6bb40e418c44749491271552306a4d. 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: 14


Maldoc score: 4


Intelligence 14 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f8eaa9c55d6901d69a13b07cbaee13695f6bb40e418c44749491271552306a4d
SHA3-384 hash: 96f44c262a05624fc60f07daf71f51301716b1743992e4cb46ce0bcbc8526ccf49f7987cebc08421ea716b8f64647ab6
SHA1 hash: 78342e7f9c532c7c27d9abd4efabafb10b42ee43
MD5 hash: 2a59708764d5dc39e6d9747b32c66cb1
humanhash: nitrogen-johnny-kitten-king
File name:9880-0806.xls
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:47'616 bytes
First seen:2022-06-12 18:50:38 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 768:hDMPKpb8rGYrMPe3q7Q0XV5xtezE8vpI8UM+Vyis73q/44fq/uVx:hYKpb8rGYrMPe3q7Q0XV5xtezE8vG8UB
TLSH T12C23B546BB5AC85DF915873448E747EA7323EC314F6B07833669B3256FF88A05A0325B
TrID 80.2% (.XLS) Microsoft Excel sheet (32500/1/3)
19.7% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter cocaman
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: 4
OLE dump

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

Section IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
337656 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
SuspiciousURLDownloadToFileAMay download files from the Internet
SuspiciousXLM macroXLM macro found. It may contain malicious code

Intelligence

File Origin
# of uploads :
1
# of downloads :
530
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
9880-0806.xls
Verdict:
Malicious activity
Analysis date:
2022-06-12 18:50:56 UTC
Tags:
macros loader
Link:
https://app.any.run/tasks/200c0697-bca6-4528-93d2-c1eb903d64d0

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
True
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/279123/
Detection(s):
SecuriteInfo.com.XLM.Trojan.Abracadabra.8.Gen.5079.4928.UNOFFICIAL
Create hunting rule

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

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

Sanesecurity.Badmacro.Xls.abpw.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.DataOpGodGaveRockNRoll2U.20211215.UNOFFICIAL
Create hunting rule

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
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
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Link:
https://app.docguard.net/f8eaa9c55d6901d69a13b07cbaee13695f6bb40e418c44749491271552306a4d/results/dashboard
Payload URLs
URL
File name
www.zardamarine.com
WorkBook
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug coinminer emotet macros macros-on-open packed regsvr32
Link:
https://www.filescan.io/uploads/62a635b42d4be2eac84c7966/reports/ec231b98-3b47-4edc-9ab7-aa1106588b80/overview
Label:
Malicious
Suspicious Score:
5.8/10
Score Malicious:
58%
Score Benign:
42%
Link:
https://www.malware.ai/gui/files/?id=cfe575ff-2f38-424c-9ba7-73402dcbefc8
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/f8eaa9c55d6901d69a13b07cbaee13695f6bb40e418c44749491271552306a4d
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/1011657
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
Snort IDS alert for network traffic
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: 644153 Sample: 9880-0806.xls Startdate: 12/06/2022 Architecture: WINDOWS Score: 100 41 103.224.241.74 WEBWERKS-AS-INWebWerksIndiaPvtLtdIN India 2->41 43 202.29.239.162 UNINET-AS-APUNINET-TH Thailand 2->43 45 37 other IPs or domains 2->45 57 Snort IDS alert for network traffic 2->57 59 Multi AV Scanner detection for domain / URL 2->59 61 Antivirus detection for URL or domain 2->61 63 11 other signatures 2->63 8 EXCEL.EXE 53 27 2->8         started        13 svchost.exe 2->13         started        signatures3 process4 dnsIp5 47 zardamarine.com 208.67.23.91, 443, 49171 GTT-BACKBONEGTTDE United States 8->47 49 www.zardamarine.com 8->49 51 2 other IPs or domains 8->51 29 C:\Users\user\wdusx2.ocx, PE32+ 8->29 dropped 31 C:\Users\user\wdusx1.ocx, PE32+ 8->31 dropped 33 C:\Users\user\AppData\...\UVvnppK[1].dll, PE32+ 8->33 dropped 35 2 other malicious files 8->35 dropped 67 Document exploit detected (creates forbidden files) 8->67 69 Document exploit detected (UrlDownloadToFile) 8->69 15 regsvr32.exe 2 8->15         started        19 regsvr32.exe 2 8->19         started        21 regsvr32.exe 8->21         started        file6 signatures7 process8 file9 37 C:\Windows\System32\...\TbRAaRBYq.dll (copy), PE32+ 15->37 dropped 55 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->55 23 regsvr32.exe 15->23         started        39 C:\Windows\System32\...\OriKBWSBSM.dll (copy), PE32+ 19->39 dropped 26 regsvr32.exe 19->26         started        signatures10 process11 dnsIp12 65 System process connects to network (likely due to code injection or exploit) 23->65 53 165.22.254.68, 443, 49174, 49175 DIGITALOCEAN-ASNUS United States 26->53 signatures13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f8eaa9c55d6901d69a13b07cbaee13695f6bb40e418c44749491271552306a4d/
Threat name:
Document-Excel.Trojan.Abracadabra
Create hunting rule
Status:
Malicious
First seen:
2022-06-08 12:20:58 UTC
File Type:
Document
Extracted files:
9
AV detection:
18 of 40 (45.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7dvktrk5nea5ngqtwb6lv3qtnfpwxnaoiggei5eusetrkurqnjgq._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/220612-xhgewsbgep/
Behaviour
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
Suspicious use of SetWindowsHookEx
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:
175.126.176.79:8080
165.22.254.68:443
116.124.128.206:8080
202.29.239.162:443
103.71.99.57:8080
88.217.172.165:8080
93.104.209.107:8080
104.244.79.94:443
196.44.98.190:8080
85.214.67.203:8080
85.25.120.45:8080
54.37.228.122:443
103.41.204.169:8080
165.232.185.110:8080
195.77.239.39:8080
36.67.23.59:443
59.148.253.194:443
103.85.95.4:8080
157.230.99.206:8080
139.196.72.155:8080
54.37.106.167:8080
118.98.72.86:443
188.225.32.231:4143
103.126.216.86:443
78.47.204.80:443
103.56.149.105:8080
202.28.34.99:8080
210.57.209.142:8080
165.22.254.236:8080
87.106.97.83:7080
198.199.70.22:8080
37.44.244.177:8080
104.248.225.227:8080
68.183.91.111:8080
64.227.55.231:8080
157.245.111.0:8080
62.171.178.147:8080
103.254.12.236:7080
202.134.4.210:7080
103.224.241.74:8080
178.62.112.199:8080
128.199.217.206:443
Dropper Extraction:
https://www.zardamarine.com/images/psQbAjrrEOXWPrS/
http://kronostr.com/tr/68yHRhfuU7Qj/
http://labfitouts.com/cgi-bin/Rea3Iu3wGvgAbTset0/
Malware family:
Emotet
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/f8eaa9c55d69/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/f8eaa9c55d6901d69a13b07cbaee13695f6bb40e418c44749491271552306a4d

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

zip d32803bad382b1d0a1b16bfe7c7865b6a0cdb4daefbf36b78bc9884e6eb32400

SilentBuilder

Excel file xls f8eaa9c55d6901d69a13b07cbaee13695f6bb40e418c44749491271552306a4d

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 d32803bad382b1d0a1b16bfe7c7865b6a0cdb4daefbf36b78bc9884e6eb32400
Cape
Cape
https://www.capesandbox.com/analysis/279123/
  
Dropped by
MD5 db6ddb7a89bebd588fe91d06e9aa9e43

Comments