MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ac2814ff3c89422bad2705cef5e4071a74a843d0026b17057e23ef87a494f9e5. 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

SHA256 hash:	ac2814ff3c89422bad2705cef5e4071a74a843d0026b17057e23ef87a494f9e5
SHA3-384 hash:	caca458bdf19af3d0272fe76dad9e89fdfdab5e3fbf370da92397cf693d11010901718b14fa0d2d32d317a5c2d79d225
SHA1 hash:	75c22fcd56021b0d7e14ae3bf3435a0cb1ea5889
MD5 hash:	800bd35865b5b6f1f0ca1b190b4feafc
humanhash:	princess-fourteen-don-bluebird
File name:	RechnungScan 2022.16.05_1150.xls
Download:	download sample
Signature	SilentBuilder Create hunting rule
File size:	74'752 bytes
First seen:	2022-05-16 10:55:24 UTC
Last seen:	Never
File type:	xls
MIME type:	application/vnd.ms-excel
ssdeep	1536:tpKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgCAezwrMCtvJecvRtbu0D5m:zKpb8rGYrMPe3q7Q0XV5xtezEsi8/dg8
TLSH	T177734A4AB98AC96CF611873949D747A9B313FC110FAB0B8B3509F3627FF49A05A0751B
TrID	80.2% (.XLS) Microsoft Excel sheet (32500/1/3) 19.7% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter	lowmal3
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: 7

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	64413 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
AutoExec	Auto_Open	Runs when the Excel Workbook is opened
Suspicious	Hex Strings	Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
Suspicious	Base64 Strings	Base64-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 :

215

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

RechnungScan 2022.16.05_1150.xls

Verdict:

Malicious activity

Analysis date:

2022-05-16 11:27:50 UTC

Tags:

macros loader

Link:

https://app.any.run/tasks/0550a3fb-2932-4e8b-bc4b-ad11459c61e2

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:

n/a

Link:

https://www.capesandbox.com/analysis/271036/

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Creating a window

Сreating synchronization primitives

DNS request

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

Launching a process by exploiting the app vulnerability

Result

Verdict:

Malicious

File Type:

Legacy Excel File

Link:

https://app.docguard.net/ac2814ff3c89422bad2705cef5e4071a74a843d0026b17057e23ef87a494f9e5/results/dashboard

Payload URLs

URL

File name

http://hullsite.com/0a61/nm6lxocqt/

WorkBook

Document image

Image:

Download PNG

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

control.exe greyware macros macros-on-open packed stripped

Link:

https://www.filescan.io/uploads/62822dc9bc516cf66c28a4de/reports/8f89f458-66a2-4f5f-8035-fbf46514587c/overview

Label:

Benign

Suspicious Score:

3.8/10

Score Malicious:

39%

Score Benign:

61%

Link:

https://www.malware.ai/gui/files/?id=c2aa166f-2be3-47a7-a403-2ee6be5ecaa7

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/ac2814ff3c89422bad2705cef5e4071a74a843d0026b17057e23ef87a494f9e5

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/994822

Signature

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

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)

Machine Learning detection for dropped file

Multi AV Scanner detection for domain / URL

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

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

Yara detected Emotet

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/ac2814ff3c89422bad2705cef5e4071a74a843d0026b17057e23ef87a494f9e5/

Threat name:

Document-Excel.Trojan.Heuristic

Status:

Malicious

First seen:

2022-05-16 10:56:11 UTC

File Type:

Document

Extracted files:

AV detection:

9 of 41 (21.95%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=vqubj7z4rfbcxljhaxhplzahdj2kqq6qajvrobl6epxypjeu7hsq._file

Result

Malware family:

emotet

Score:

10/10

Tags:

family:emotet botnet:epoch4 banker macro suricata trojan xlm

Link:

https://tria.ge/reports/220516-m1ptwabdcl/

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:

131.100.24.231:80
103.132.242.26:8080
167.172.253.162:8080
149.56.131.28:8080
209.126.98.206:8080
188.44.20.25:443
212.237.17.99:8080
129.232.188.93:443
160.16.142.56:8080
46.55.222.11:443
1.234.2.232:8080
45.235.8.30:8080
185.157.82.211:8080
158.69.222.101:443
185.4.135.165:8080
27.54.89.58:8080
197.242.150.244:8080
153.126.146.25:7080
183.111.227.137:8080
103.75.201.2:443
45.118.115.99:8080
79.137.35.198:8080
172.104.251.154:8080
159.65.88.10:8080
203.114.109.124:443
101.50.0.91:8080
51.254.140.238:7080
206.189.28.199:8080
72.15.201.15:8080
150.95.66.124:8080
201.94.166.162:443
209.97.163.214:443
103.70.28.102:8080
185.8.212.130:7080
216.158.226.206:443
209.250.246.206:443
23.239.0.12:443
164.68.99.3:8080
102.222.215.74:443
134.122.66.193:8080
82.165.152.127:8080
51.91.76.89:8080
189.126.111.200:7080
146.59.226.45:443
163.44.196.120:8080
51.91.7.5:8080
58.227.42.236:80
167.99.115.35:8080
196.218.30.83:443
107.182.225.142:8080
151.106.112.196:8080
91.207.28.33:8080
94.23.45.86:4143
103.43.46.182:443
45.176.232.124:443
5.9.116.246:8080
173.212.193.249:8080
1.234.21.73:7080
212.24.98.99:8080
213.241.20.155:443
110.232.117.186:8080
77.81.247.144:8080
119.193.124.41:7080

Dropper Extraction:

http://hullsite.com/0a61/nm6lxocqt/

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/ac2814ff3c89422bad2705cef5e4071a74a843d0026b17057e23ef87a494f9e5

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

xls ac2814ff3c89422bad2705cef5e4071a74a843d0026b17057e23ef87a494f9e5

(this sample)

Delivery method

Distributed via e-mail attachment

Cape

https://www.capesandbox.com/analysis/271036/

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