MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c1f4d71ab8988e83394d7f9c9c87147d82a72a9049d4a1525605dbad8d4e494c. 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: 15

Maldoc score: 10

Intelligence 15 IOCs YARA 2 File information Comments

SHA256 hash:	c1f4d71ab8988e83394d7f9c9c87147d82a72a9049d4a1525605dbad8d4e494c
SHA3-384 hash:	82cad2ad35ad2a2f04196a29ec249e4c6c40432313557b79cc676c3e2eb9d6858e241053f01ccc81c2c1f583687c03ee
SHA1 hash:	ed9373f42c5fa94fa51c8953523938168b9dc2d0
MD5 hash:	74619eca585fb0c0dda0efb743c010c0
humanhash:	stream-uncle-washington-twenty
File name:	Rechnungs-Details 2022.06.07_1042.xls
Download:	download sample
Signature	SilentBuilder Create hunting rule
File size:	97'296 bytes
First seen:	2022-07-11 09:50:53 UTC
Last seen:	Never
File type:	xls
MIME type:	application/vnd.ms-excel
ssdeep	1536:PFKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgmHuS4hcTO97v7UYdEJmpH:tKpb8rGYrMPe3q7Q0XV5xtezEsi8/dg9
TLSH	T1D8934945B759DA1EF621833148E787AA3333FC204F6B47472228B3257FB99A04B0721B
TrID	80.2% (.XLS) Microsoft Excel sheet (32500/1/3) 19.7% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter	Anonymous
Tags:	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: 10

OLE dump

MalwareBazaar was able to identify 3 sections in this file using oledump:

Section ID	Section size	Section name
1	4096 bytes	DocumentSummaryInformation
2	4096 bytes	SummaryInformation
3	86711 bytes	Workbook

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
Hex String	gGGE	67474745
Hex String	xXWd	78585764
Hex String	E64R	45363452
Hex String	SegWT	5365675754
Hex String	V4cG	56346347
Hex String	GgWG	47675747
Suspicious	XLM macro	XLM macro found. It may contain malicious code
Suspicious	Windows	May enumerate application windows (if combined with Shell.Application object)
Suspicious	URLDownloadToFileA	May download files from the Internet
Suspicious	EXEC	May run an executable file or a system
Suspicious	Hex Strings	Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin

# of uploads :

# of downloads :

243

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Rechnungs-Details 2022.06.07_1042.xls

Verdict:

Malicious activity

Analysis date:

2022-07-11 20:02:30 UTC

Tags:

macros loader

Link:

https://app.any.run/tasks/4bfdfe1b-dbb0-4388-b894-a260e94d0490

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

Detection:

Emotet

Link:

https://www.capesandbox.com/analysis/286142/

Detection(s):

SecuriteInfo.com.XLM.Trojan.Abracadabra.8.Gen.14039.5043.UNOFFICIAL

Sanesecurity.Badmacro.Xls.encdl.UNOFFICIAL

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.URLDOWNLOADTOFILE.200415.UNOFFICIAL

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.SHELLEXECUTE.200416.UNOFFICIAL

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.SHELLEXECUTE.200524.UNOFFICIAL

TwinWave.EvilDoc.Excel4DragoTrainingMontage.20210204.UNOFFICIAL

TwinWave.EvilDoc.XL4MStringFractures.20210921.UNOFFICIAL

TwinWave.EvilDoc.XL4QakyFeaturingNothingNowhere.M2.20210611.UNOFFICIAL

TwinWave.EvilDoc.XL4DataopItWasGoodLivingWithYou.20211109.UNOFFICIAL

TwinWave.EvilDoc.DataOpGodGaveRockNRoll2U.20211215.UNOFFICIAL

TwinWave.EvilDoc.XL4QakyFeaturingNothingNowhere.M2.20220215.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Creating a window

Сreating synchronization primitives

DNS request

Creating a process with a hidden window

Launching a process

Sending an HTTP GET request

Query of malicious DNS domain

Launching a process by exploiting the app vulnerability

Sending an HTTP GET request to an infection source by exploiting the app vulnerability

Sending a TCP request to an infection source by exploiting the app vulnerability

Result

Verdict:

Malicious

File Type:

Legacy Excel File

Link:

https://app.docguard.net/c1f4d71ab8988e83394d7f9c9c87147d82a72a9049d4a1525605dbad8d4e494c/results/dashboard

Payload URLs

URL

File name

charliecaper.com

WorkBook

Document image

Image:

Download PNG

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

greyware macros macros-on-open packed regsvr32

Link:

https://www.filescan.io/uploads/62cbf2d47d5b150059f315a9/reports/7a3fdcf2-bcd5-4320-9aa8-4d33602d1d2d/overview

Label:

Malicious

Suspicious Score:

5.9/10

Score Malicious:

59%

Score Benign:

41%

Link:

https://www.malware.ai/gui/files/?id=f8b34bce-94c4-43a9-b32b-c31cc5d510fc

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/c1f4d71ab8988e83394d7f9c9c87147d82a72a9049d4a1525605dbad8d4e494c

Details

Autostarting Excel Macro Sheet

Excel contains Macrosheet logic that will trigger automatically upon document open.

Result

Threat name:

Hidden Macro 4.0, Emotet

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1028406

Signature

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Document exploit detected (creates forbidden files)

Document exploit detected (drops PE files)

Document exploit detected (process start blacklist hit)

Document exploit detected (UrlDownloadToFile)

Drops PE files to the user root directory

Found Excel 4.0 Macro with suspicious formulas

Found malicious Excel 4.0 Macro

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

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)

Office process drops PE file

Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)

Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)

Snort IDS alert for network traffic

System process connects to network (likely due to code injection or exploit)

Uses ipconfig to lookup or modify the Windows network settings

Yara detected Emotet

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/c1f4d71ab8988e83394d7f9c9c87147d82a72a9049d4a1525605dbad8d4e494c/

Threat name:

Document-Office.Trojan.Abracadabra

Status:

Malicious

First seen:

2022-07-11 09:51:07 UTC

File Type:

Document

Extracted files:

AV detection:

19 of 26 (73.08%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=yh2nogvytchigoknp6ojzbyupwbkokuqjhkkcuswaxn23dkojfga._file

Result

Malware family:

emotet

Score:

10/10

Tags:

family:emotet botnet:epoch4 banker macro suricata trojan xlm

Link:

https://tria.ge/reports/220711-lvg2eaadb8/

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

C2 Extraction:

94.23.45.86:4143
209.97.163.214:443
212.24.98.99:8080
103.43.75.120:443
183.111.227.137:8080
197.242.150.244:8080
129.232.188.93:443
159.65.88.10:8080
163.44.196.120:8080
51.161.73.194:443
164.90.222.65:443
159.89.202.34:443
1.234.2.232:8080
150.95.66.124:8080
51.91.76.89:8080
196.218.30.83:443
5.9.116.246:8080
146.59.226.45:443
173.212.193.249:8080
213.241.20.155:443
213.239.212.5:443
207.148.79.14:8080
51.254.140.238:7080
45.235.8.30:8080
147.139.166.154:8080
64.227.100.222:8080
82.165.152.127:8080
172.105.226.75:8080
131.100.24.231:80
206.189.28.199:8080
151.106.112.196:8080
119.193.124.41:7080
45.176.232.124:443
79.137.35.198:8080
186.194.240.217:443
103.70.28.102:8080
159.65.140.115:443
104.168.155.143:8080
45.118.115.99:8080
115.68.227.76:8080
72.15.201.15:8080
144.202.108.116:8080
37.187.115.122:8080
110.232.117.186:8080
209.126.98.206:8080
172.104.251.154:8080
82.223.21.224:8080
101.50.0.91:8080
103.132.242.26:8080
201.94.166.162:443
185.4.135.165:8080
160.16.142.56:8080
107.170.39.149:8080
134.122.66.193:8080
139.59.126.41:443
149.56.131.28:8080
91.207.28.33:8080
164.68.99.3:8080
188.44.20.25:443
103.75.201.2:443
167.172.253.162:8080
158.69.222.101:443
153.126.146.25:7080

Dropper Extraction:

http://charliecaper.com/wp-includes/Q8IU0ksWg0/
http://che-fare.com/che-fare-media/rPI4ln2WQ7IyznRle/
https://pccurico.cl/wp-admin/9XR3XWZGidfKVYYzW/
http://ftp.yourbankruptcypartner.com/wp-content/HjSaWCEgzhi6CZS/

Malware family:

Emotet

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/c1f4d71ab898/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/c1f4d71ab8988e83394d7f9c9c87147d82a72a9049d4a1525605dbad8d4e494c

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:	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

xls c1f4d71ab8988e83394d7f9c9c87147d82a72a9049d4a1525605dbad8d4e494c

(this sample)

Delivery method

Distributed via e-mail attachment

Cape

https://www.capesandbox.com/analysis/286142/

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