MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b29f5ea55908af68adffdb043e663376fb816ab388885b4ccf08acad69812b87. 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: b29f5ea55908af68adffdb043e663376fb816ab388885b4ccf08acad69812b87
SHA3-384 hash: 5adbc6f37bd85a0eedd5383cde60116059cac74444ed383467e87eb4df68462f19d39495f7edceaacef28c77ef121b2e
SHA1 hash: 3637f79a11968081a25cda956c0ab91938048cb4
MD5 hash: 43ade0072d23b808fdb0280ee4b9bc64
humanhash: equal-mockingbird-purple-mango
File name:Invoice # 74265308 R#44702326 9606.xls
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:40'960 bytes
First seen:2022-05-12 13:19:50 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 768:pkZKpb8rGYrMPe3q7Q0XV5xtezEs/68/dgAdCBn9kC+xbqc6q+otrvEVLcAA:p+Kpb8rGYrMPe3q7Q0XV5xtezEsi8/d5
TLSH T15803834ABA5AC85DF925C73548E743E9B362FC105F6B0B873645B3657FF89A04A0320B
TrID 80.2% (.XLS) Microsoft Excel sheet (32500/1/3)
19.7% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter 604Kuzushi
Tags:Emotet 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
331001 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 :
311
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/270096/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a custom TCP request
Creating a window
Сreating synchronization primitives
Searching for the window
DNS request
Sending a custom TCP request by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Link:
https://app.docguard.net/b29f5ea55908af68adffdb043e663376fb816ab388885b4ccf08acad69812b87/results/dashboard
Payload URLs
URL
File name
www.itesmeitic.com
WorkBook
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
greyware macros macros-on-open regsvr32 shell32.dll
Link:
https://www.filescan.io/uploads/627d099940028d3247cceab1/reports/b70f8f8b-2713-4acb-bc0d-b97b1c923f1f/overview
Label:
Malicious
Suspicious Score:
5.4/10
Score Malicious:
55%
Score Benign:
45%
Link:
https://www.malware.ai/gui/files/?id=533ddf22-6356-4372-8be8-03b48e4edb22
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/b29f5ea55908af68adffdb043e663376fb816ab388885b4ccf08acad69812b87
Details
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b29f5ea55908af68adffdb043e663376fb816ab388885b4ccf08acad69812b87/
Threat name:
Document-Excel.Trojan.Emotet
Create hunting rule
Status:
Malicious
First seen:
2022-05-12 13:20:05 UTC
File Type:
Document
Extracted files:
9
AV detection:
11 of 41 (26.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wkpv5jkzbcxwrlp73mcd4zrto35yc2vtrcefwtgpbcwk22mbfodq._file
Result
Malware family:
emotet
Create hunting rule
Score:
  10/10
Tags:
family:emotet banker macro suricata trojan xlm
Link:
https://tria.ge/reports/220512-qk3ycafcc4/
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
Loads dropped DLL
Downloads MZ/PE file
Emotet
Process spawned unexpected child process
suricata: ET MALWARE W32/Emotet CnC Beacon 3
Malware Config
Dropper Extraction:
https://www.itesmeitic.com/term/IFjx5ElE0ldr8wDDHjub/
Malware family:
Emotet
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b29f5ea55908/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/b29f5ea55908af68adffdb043e663376fb816ab388885b4ccf08acad69812b87

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 b29f5ea55908af68adffdb043e663376fb816ab388885b4ccf08acad69812b87

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/270096/

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