MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 525cad864e0ca1450fc2e30caefab55372398cff8f5f3822566022ee0a652345. 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: 5

Intelligence 12 IOCs YARA 5 File information Comments 1

SHA256 hash:	525cad864e0ca1450fc2e30caefab55372398cff8f5f3822566022ee0a652345
SHA3-384 hash:	5f07826f230fc386bbbe45780f0f754d0aca92c0835596bf88db526216466b6af0172e50e8e5d106cce5d7a2e8b65b02
SHA1 hash:	aecc372cdd162eef77a90dd39af4530542f7fb22
MD5 hash:	70c891df25a49b5e6d636b667dd38332
humanhash:	march-mockingbird-west-whiskey
File name:	70c891df25a49b5e6d636b667dd38332
Download:	download sample
Signature	SilentBuilder Create hunting rule
File size:	67'830 bytes
First seen:	2021-12-24 17:55:22 UTC
Last seen:	Never
File type:	xlsx
MIME type:	application/vnd.ms-excel
ssdeep	1536:eZGk3hbdlylKsgqopeJBWhZFGkE+cL2NdAwzMk9B+ooPzMk9A+oosxUJhz:eUk3hbdlylKsgqopeJBWhZFGkE+cL2N6
TLSH	T1F7634B467793D98AD94217358DE3C29B7737FC129FA682073184B31D5EB9AA08C03B1B
Reporter	zbetcheckin
Tags:	excel 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: 5

OLE dump

MalwareBazaar was able to identify 11 sections in this file using oledump:

Section ID	Section size	Section name
1	108 bytes	CompObj
2	312 bytes	DocumentSummaryInformation
3	200 bytes	SummaryInformation
4	51800 bytes	Workbook
5	479 bytes	_VBA_PROJECT_CUR/PROJECT
6	83 bytes	_VBA_PROJECT_CUR/PROJECTwm
7	1097 bytes	_VBA_PROJECT_CUR/VBA/Sheet1
8	1097 bytes	_VBA_PROJECT_CUR/VBA/Sheet2
9	1209 bytes	_VBA_PROJECT_CUR/VBA/ThisWorkbook
10	2697 bytes	_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
11	548 bytes	_VBA_PROJECT_CUR/VBA/dir

OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

Type	Keyword	Description
AutoExec	Auto_Open	Runs when the Excel Workbook is opened
IOC	87.251.85.100	IPv4 address
IOC	87.251.86.178	IPv4 address
Suspicious	Hex Strings	Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
Suspicious	XLM macro	XLM macro found. It may contain malicious code

Intelligence

File Origin

# of uploads :

# of downloads :

152

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

70c891df25a49b5e6d636b667dd38332

Verdict:

Malicious activity

Analysis date:

2021-12-24 17:59:37 UTC

Tags:

macros macros40 loader trojan

Link:

https://app.any.run/tasks/db091c28-9559-42a5-841d-4b9578702969

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

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/216212/

Detection(s):

SecuriteInfo.com.Trojan.GenericKD.47707798.UNOFFICIAL

TwinWave.EvilDoc.DOCXRSTRGOOD.MSHTA.210816.UNOFFICIAL

TwinWave.EvilDoc.HiddenSheetExcel4LureRecognizer.20200915.UNOFFICIAL

TwinWave.EvilDoc.Excel4MacroLuresWatchingTheDectives.20210115.UNOFFICIAL

TwinWave.EvilDoc.Excel4DragoTrainingMontage.20210204.UNOFFICIAL

TwinWave.EvilDoc.Excel4HateMeSometimes.20210819.UNOFFICIAL

TwinWave.EvilDoc.DOCXSTRGOODXL4.HTTP

TwinWave.EvilDoc.DridexUManiac.20211215.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

DNS request

Sending a custom TCP request

Creating a window

Сreating synchronization primitives

Creating a process with a hidden window

Launching a process

Sending an HTTP GET request

Running batch commands by exploiting the app vulnerability

Result

Verdict:

Malicious

File Type:

Legacy Excel File with Macro

Link:

https://app.docguard.net/525cad864e0ca1450fc2e30caefab55372398cff8f5f3822566022ee0a652345/results/dashboard

Payload URLs

URL

File name

87.251.85.100

WorkBook

Document image

Image:

Download PNG

Verdict:

Malicious

Threat level:

10/10

Confidence:

50%

Tags:

cmd macros macros-on-open mshta

Link:

https://www.filescan.io/uploads/61c609b78991ba72b395ecb2/reports/61028a64-5281-4deb-988e-d33f6ee28cd9/overview

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/525cad864e0ca1450fc2e30caefab55372398cff8f5f3822566022ee0a652345

Details

Excel 4.0 Macro

Document contains Excel 4.0 macros (XLM). A valid, albeit dated feature, this document should be treated with suspicion.

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.

Document With Minimal Content

Document contains less than 1 kilobyte of semantic information.

Result

Threat name:

Hidden Macro 4.0 Emotet

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/912532

Signature

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Document exploit detected (process start blacklist hit)

Found Excel 4.0 Macro with suspicious formulas

Found malware configuration

Hides that the sample has been downloaded from the Internet (zone.identifier)

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Obfuscated command line found

Powershell drops PE file

Sigma detected: Microsoft Office Product Spawning Windows Shell

Sigma detected: MSHTA Spawning Windows Shell

Sigma detected: Suspicious MSHTA Process Patterns

Sigma detected: Suspicious PowerShell Command Line

Yara detected Emotet

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/525cad864e0ca1450fc2e30caefab55372398cff8f5f3822566022ee0a652345/

Threat name:

Document-Excel.Trojan.Hiddbook

Status:

Malicious

First seen:

2021-12-24 17:56:10 UTC

File Type:

Document

Extracted files:

AV detection:

14 of 27 (51.85%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=kjok3bsobsqukd6c4mgk56vvknzdtdh7r5ptqiswmaro4ctfencq._file

Result

Malware family:

emotet

Score:

10/10

Tags:

family:emotet botnet:epoch4 banker macro macro_on_action suricata trojan xlm

Link:

https://tria.ge/reports/211224-wh1yvsdgcr/

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 AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Program crash

Drops file in System32 directory

Loads dropped DLL

Blocklisted process makes network request

Downloads MZ/PE file

Emotet

Process spawned unexpected child process

suricata: ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Dridex/Trickbot CnC)

suricata: ET MALWARE W32/Emotet CnC Beacon 3

Malware Config

C2 Extraction:

144.217.91.150:443
51.38.71.0:443
212.237.56.116:7080
79.172.212.216:8080
178.79.147.66:8080
138.185.72.26:8080
192.254.71.210:443
178.63.25.185:443
195.154.133.20:443
45.118.135.203:7080
81.0.236.90:443
107.182.225.142:8080
162.214.50.39:7080
50.116.54.215:443
203.114.109.124:443
45.118.115.99:8080
216.158.226.206:443
104.168.155.129:8080
110.232.117.186:8080
176.104.106.96:8080
46.55.222.11:443
51.68.175.8:8080
207.38.84.195:8080
58.227.42.236:80
45.176.232.124:443
104.251.214.46:8080
103.8.26.102:8080
45.142.114.231:8080
217.182.143.207:443
41.76.108.46:8080
212.237.5.209:443
103.8.26.103:8080
212.237.17.99:8080
173.212.193.249:8080
158.69.222.101:443
103.75.201.2:443

Dropper Extraction:

http://87.251.86.178/pp/bb.html
http://87.251.86.178/pp/PP3.PNG

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/525cad864e0ca1450fc2e30caefab55372398cff8f5f3822566022ee0a652345

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:	INDICATOR_DOC_PhishingPatterns Create hunting rule
Author:	ditekSHen
Description:	Detects OLE, RTF, PDF and OOXML (decompressed) documents with common phishing strings

Rule name:	SUSP_EnableContent_String_Gen Create hunting rule
Author:	Florian Roth
Description:	Detects suspicious string that asks to enable active content in Office Doc
Reference:	Internal Research

Rule name:	SUSP_EnableContent_String_Gen_RID322C Create hunting rule
Author:	Florian Roth
Description:	Detects suspicious string that asks to enable active content in Office Doc
Reference:	Internal Research