MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 239f5f4bf79218e55b315045cb684d67a705f54a6fdb5a99516193cdca112693. 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: 11


Maldoc score: 7


Intelligence 11 IOCs YARA 2 File information Comments

SHA256 hash: 239f5f4bf79218e55b315045cb684d67a705f54a6fdb5a99516193cdca112693
SHA3-384 hash: 9da82e2443e6734309a8520d2b6467574e180c81eac189c7959a20aaf42237eabd5218889dabe435cf283ed20c232c11
SHA1 hash: 55073bf36df269fb0631a8404a38f93b581c686e
MD5 hash: 8a8bbc9bb6e234e07a33b8396cd7eb20
humanhash: december-winner-jig-ack
File name:DOCUMENTO 23052022.xls
Download: download sample
Signature SilentBuilder
File size:54'784 bytes
First seen:2022-05-23 10:06:50 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:LPKpb8rGYrMPe3q7Q0XV5xtezE8vG8UM+bSgNeEYL8ECyP:rKpb8rGYrMPe3q7Q0XV5xtezE8vG8UMF
TLSH T18C33F846BA5A995DF916873048D74BA96323FC314FAB07833669F3246FFD9E05A0310B
TrID 80.2% (.XLS) Microsoft Excel sheet (32500/1/3)
19.7% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter pr0xylife
Tags:Emotet epoch5 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
344730 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
SuspiciousWindowsMay enumerate application windows (if combined with Shell.Application object)
SuspiciousHex StringsHex-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 :
290
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
DOCUMENTO 23052022.xls
Verdict:
Malicious activity
Analysis date:
2022-05-23 10:18:12 UTC
Tags:
macros loader

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
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
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
Payload URLs
URL
File name
https://newkano.com/wp-admin/66rIsrVwoPKUsjcAs/
WorkBook
Document image
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
greyware keylogger macros macros-on-open packed regsvr32 shell32.dll
Label:
Benign
Suspicious Score:
2.0/10
Score Malicious:
2%
Score Benign:
8%
Result
Verdict:
MALICIOUS
Details
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Threat name:
Document-Excel.Trojan.Abracadabra
Status:
Malicious
First seen:
2022-05-23 10:07:06 UTC
File Type:
Document
Extracted files:
9
AV detection:
16 of 26 (61.54%)
Threat level:
  5/5
Result
Malware family:
n/a
Score:
  10/10
Tags:
macro xlm
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Loads dropped DLL
Downloads MZ/PE file
Process spawned unexpected child process
Malware Config
Dropper Extraction:
https://newkano.com/wp-admin/66rIsrVwoPKUsjcAs/
http://ocalogullari.com/inc/Wcm82enrs8/
https://myphamcuatui.com/assets/OPVeVSpO/
http://sieuthiphutungxenang.com/old_source/9boJQZpTSdQE/
Please note that we are no longer able to provide a coverage score for Virus Total.

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
Rule name:SUSP_Excel4Macro_AutoOpen
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.

Comments