MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 594a0c8db0fb9eb3abe730bcd8ef41eb13daf7423139745dad22f5d3168c745d. 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: 13


Maldoc score: 7


Intelligence 13 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 594a0c8db0fb9eb3abe730bcd8ef41eb13daf7423139745dad22f5d3168c745d
SHA3-384 hash: d229447e9597443e56a52f1b1b8f93f23200e472be49d14f682deaf886cb08166d6f7b55715c80bfd7c3e9064f901a40
SHA1 hash: 5c5812b270c3e38ebcdedb80cc4bffc80c8e67b2
MD5 hash: a73db1f64b40d08d3d6c3e7c297eb5a3
humanhash: white-high-high-bravo
File name:2022-02-03-a73db1f64b40d08d3d6c3e7c297eb5a3_unzipped.bin
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:106'496 bytes
First seen:2022-02-02 23:41:33 UTC
Last seen:2022-02-13 01:53:44 UTC
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 3072:yWKpbdrHYrMue8q7QPX+5xtekEdi8/dg1JcdOpsHgGOqd4p4:nKpbdrHYrMue8q7QPX+5xtFEdi8/dg1o
TLSH T17EA37B5A7326884EE55A8B3488F707963733ED208B5B02477215F3D62FBAA901B03D5F
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 :
5
# of downloads :
91
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:
Emotet
Create hunting rule
Link:
https://www.capesandbox.com/analysis/231251/
Detection(s):
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
Sending a custom TCP 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 an HTTP GET request
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Link:
https://app.docguard.net/594a0c8db0fb9eb3abe730bcd8ef41eb13daf7423139745dad22f5d3168c745d/results/dashboard
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
greyware macros macros-on-open packed rundll32 rundll32.exe stripped
Link:
https://www.filescan.io/uploads/61fb16d4a0f6a794b33521a6/reports/519ca543-6aee-48b1-83af-ec3dccef588b/overview
Label:
Benign
Suspicious Score:
3.6/10
Score Malicious:
36%
Score Benign:
64%
Link:
https://www.malware.ai/gui/files/?id=13ffad30-91f3-422f-8a2a-9cb8a22d3290
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/594a0c8db0fb9eb3abe730bcd8ef41eb13daf7423139745dad22f5d3168c745d
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/594a0c8db0fb9eb3abe730bcd8ef41eb13daf7423139745dad22f5d3168c745d/
Threat name:
Document-Office.Trojan.Emotet
Create hunting rule
Status:
Malicious
First seen:
2022-02-03 16:00:46 UTC
File Type:
Document
Extracted files:
11
AV detection:
15 of 43 (34.88%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=lffazdnq7oplhk7hgc6nr32b5mj5v52cge4xixnnel25gfumoroq._file
Result
Malware family:
emotet
Create hunting rule
Score:
  10/10
Tags:
family:emotet botnet:epoch5 banker macro persistence trojan xlm
Link:
https://tria.ge/reports/220202-3p2bjacdb4/
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
Malware Config
C2 Extraction:
174.136.15.27:8080
185.122.58.89:443
66.42.57.149:443
159.69.237.188:443
78.47.204.80:443
54.38.242.185:443
37.44.244.177:8080
185.148.168.220:8080
217.182.143.207:443
198.199.98.78:8080
139.196.72.155:8080
59.148.253.194:443
195.77.239.39:8080
210.57.209.142:8080
128.199.192.135:8080
173.203.78.138:443
62.171.178.147:8080
85.214.67.203:8080
185.148.168.15:8080
191.252.103.16:80
190.90.233.66:443
185.184.25.78:8080
207.148.81.119:8080
104.131.62.48:8080
78.46.73.125:443
37.59.209.141:8080
118.98.72.86:443
54.37.228.122:443
168.197.250.14:80
93.104.208.37:8080
54.37.106.167:8080
116.124.128.206:8080
194.9.172.107:8080
203.153.216.46:443
195.154.146.35:443
103.41.204.169:8080
Dropper Extraction:
http://cableequipmentmanagementreturns.com/wp-admin/JPivizxmiwo9A5Owys/
Malware family:
Emotet
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/594a0c8db0fb/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/594a0c8db0fb9eb3abe730bcd8ef41eb13daf7423139745dad22f5d3168c745d

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 594a0c8db0fb9eb3abe730bcd8ef41eb13daf7423139745dad22f5d3168c745d

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/231251/

Comments