MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2bf48c20b48e4ca007993f9dd3cd141883f8b52252be3dd9e2d3a2531dd504a1. 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: 9


Maldoc score: 7


Intelligence 9 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2bf48c20b48e4ca007993f9dd3cd141883f8b52252be3dd9e2d3a2531dd504a1
SHA3-384 hash: d5e43428b70cda7deda78b241e99376be6703a2a0d0e536481c1265953ff225c28d31739c1dbea6f5800a9aec66ddc28
SHA1 hash: ef3fc327e4b3cc51894f0050a1de95710f5a572f
MD5 hash: 950406441eee28ee3cff015f2e3b8c9f
humanhash: orange-cup-two-pasta
File name:2022-02-03-950406441eee28ee3cff015f2e3b8c9f_unzipped.bin
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:106'496 bytes
First seen:2022-02-03 10:20:54 UTC
Last seen:2022-02-13 05:19:30 UTC
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 3072:yWKpbdrHYrMue8q7QPX+5xtekEdi8/dg1JcdOpsHgGOqd4d4:nKpbdrHYrMue8q7QPX+5xtFEdi8/dg10
TLSH T15EA37B5A7326884EE55A8B3488F707963733ED208B5B02477215F3D62FBAA901B03D5F
Reporter Cryptolaemus1
Tags:doc Emotet epoch5 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
395985 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 :
8
# of downloads :
76
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/231983/
Detection(s):
SecuriteInfo.com.Macro.Downlader-12.UNOFFICIAL
Create hunting rule

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

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.RUNDLL32.EXE.200327.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.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.RUNDLL32.EXE.200416.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.Excel4Macro.HiddenSheetDLWAKEUP.20200310.UNOFFICIAL
Create hunting rule

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

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

TwinWave.EvilDoc.XLSLOLBINHammerToFall.20201218.UNOFFICIAL
Create hunting rule

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

TwinWave.EvilDoc.DOCXSTRGOODXL4.HTTP
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOODXL4.HTTPS
Create hunting rule

TwinWave.EvilDoc.DataOpGodGaveRockNRoll2U.20211215.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
DNS request
Creating a window
Сreating synchronization primitives
Creating a file
Creating a process with a hidden window
Launching a process
Moving a recently created file
Sending a custom TCP request
Sending an HTTP GET request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Launching a process by exploiting the app vulnerability
Label:
Benign
Suspicious Score:
3.6/10
Score Malicious:
36%
Score Benign:
64%
Link:
https://www.malware.ai/gui/files/?id=ac2f1907-0e9c-438b-a010-803a34a5816c
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/2bf48c20b48e4ca007993f9dd3cd141883f8b52252be3dd9e2d3a2531dd504a1
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.
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2bf48c20b48e4ca007993f9dd3cd141883f8b52252be3dd9e2d3a2531dd504a1/
Threat name:
Document-Office.Trojan.Emotet
Create hunting rule
Status:
Malicious
First seen:
2022-02-03 10:36:44 UTC
File Type:
Document
Extracted files:
11
AV detection:
9 of 43 (20.93%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fp2iyifurzgkab4zh6o5htiudcb7rnjckk7d3wpc2orfghovasqq._file
Result
Malware family:
emotet
Create hunting rule
Score:
  10/10
Tags:
family:emotet botnet:epoch5 banker macro persistence suricata trojan xlm
Link:
https://tria.ge/reports/220203-mpd81afgdp/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies data under HKEY_USERS
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Drops file in System32 directory
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Sets service image path in registry
Emotet
Process spawned unexpected child process
suricata: ET MALWARE W32/Emotet CnC Beacon 3
Malware Config
C2 Extraction:
172.105.115.71:443
185.184.25.78:8080
191.252.103.16:80
207.148.81.119:8080
37.44.244.177:8080
210.57.209.142:8080
37.59.209.141:8080
59.148.253.194:443
159.69.237.188:443
195.154.146.35:443
203.153.216.46:443
104.131.62.48:8080
173.203.78.138:443
217.182.143.207:443
54.38.242.185:443
116.124.128.206:8080
54.37.106.167:8080
195.77.239.39:8080
85.214.67.203:8080
198.199.98.78:8080
190.90.233.66:443
103.41.204.169:8080
185.148.168.15:8080
185.148.168.220:8080
142.4.219.173:8080
168.197.250.14:80
139.196.72.155:8080
118.98.72.86:443
128.199.192.135:8080
78.46.73.125:443
66.42.57.149:443
78.47.204.80:443
194.9.172.107:8080
62.171.178.147:8080
54.37.228.122:443
Dropper Extraction:
http://cableequipmentmanagementreturns.com/wp-admin/JPivizxmiwo9A5Owys/
http://novawedevent.com/tmp/PA0rBwFszIpy/
https://www.altasolutions.asia/myfiles/myB984EnOlSJJ4b9/
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/2bf48c20b48e4ca007993f9dd3cd141883f8b52252be3dd9e2d3a2531dd504a1

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 xlsx 2bf48c20b48e4ca007993f9dd3cd141883f8b52252be3dd9e2d3a2531dd504a1

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/231983/

Comments