MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c528e4e79822ef50b865a92de20a1aad0cf7c1dec7b6662a07efb6665a3996cf. 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: 11


Maldoc score: 12


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c528e4e79822ef50b865a92de20a1aad0cf7c1dec7b6662a07efb6665a3996cf
SHA3-384 hash: 71680912d1914c6dc85f0b7f0520041b0f6d1142f9e28da7f3ce51a983f7a021068a053053c06dbf2a461c22ca76a243
SHA1 hash: b8ead6ce4f4e2090a7b39103d4777c09f11eea6f
MD5 hash: 6b21809ddf73cf5f57952cd19948e0de
humanhash: venus-apart-tango-alanine
File name:Rech 2022.05.07_0950.xls
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:96'786 bytes
First seen:2022-07-05 09:04:28 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:MFKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgYHuS4hcTO97v7UYdEJmFnI:CKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgw
TLSH T149934A45B65ADE5EF625873108E787A67333FC304F6B47432268B3256FB99A04B0721B
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: 12
OLE dump

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

Section IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
386455 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
Hex StringSegWT5365675754
Hex StringV4cG56346347
Hex StringGgWG47675747
Hex StringgGGE67474745
Hex StringxXWd78585764
Hex StringE64R45363452
SuspiciousWindowsMay enumerate application windows (if combined with Shell.Application object)
SuspiciousURLDownloadToFileAMay download files from the Internet
SuspiciousEXECMay run an executable file or a system
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 :
1
# of downloads :
237
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.XLM.Trojan.Abracadabra.8.Gen.23684.27101.UNOFFICIAL
Create hunting rule

Sanesecurity.Badmacro.Xls.encdl.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.URLDOWNLOADTOFILE.200415.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.SHELLEXECUTE.200416.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.SHELLEXECUTE.200524.UNOFFICIAL
Create hunting rule

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

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

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

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

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

TwinWave.EvilDoc.XL4QakyFeaturingNothingNowhere.M2.20220215.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a file
Creating a process with a hidden window
Launching a process
Moving a recently created file
Query of malicious DNS domain
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Link:
https://app.docguard.net/c528e4e79822ef50b865a92de20a1aad0cf7c1dec7b6662a07efb6665a3996cf/results/dashboard
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
greyware macros macros-on-open packed regsvr32
Link:
https://www.filescan.io/uploads/62c3fec211764e36f81636e0/reports/cfb78711-0cad-49e5-916b-7533d8dc57c8/overview
Label:
Benign
Suspicious Score:
3.7/10
Score Malicious:
38%
Score Benign:
62%
Link:
https://www.malware.ai/gui/files/?id=2c045f71-3a81-4328-a142-820f736d6e0f
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/c528e4e79822ef50b865a92de20a1aad0cf7c1dec7b6662a07efb6665a3996cf
Details
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Result
Threat name:
Hidden Macro 4.0
Create hunting rule
Detection:
malicious
Classification:
expl.evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1024661
Signature
Antivirus detection for URL or domain
Document exploit detected (process start blacklist hit)
Document exploit detected (UrlDownloadToFile)
Found Excel 4.0 Macro with suspicious formulas
Found malicious Excel 4.0 Macro
Multi AV Scanner detection for submitted file
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 657154 Sample: Rech 2022.05.07_0950.xls Startdate: 05/07/2022 Architecture: WINDOWS Score: 76 23 Antivirus detection for URL or domain 2->23 25 Multi AV Scanner detection for submitted file 2->25 27 Found malicious Excel 4.0 Macro 2->27 29 2 other signatures 2->29 6 EXCEL.EXE 11 30 2->6         started        process3 dnsIp4 21 wp.eryaz.net 188.132.217.108, 49743, 80 PREMIERDC-VERI-MERKEZI-ANONIM-SIRKETIPREMIERDC-SHTR Turkey 6->21 19 C:\Users\user\...\Rech 2022.05.07_0950.xls, Composite 6->19 dropped 31 Document exploit detected (UrlDownloadToFile) 6->31 11 regsvr32.exe 6->11         started        13 regsvr32.exe 6->13         started        15 regsvr32.exe 6->15         started        17 regsvr32.exe 6->17         started        file5 signatures6 process7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c528e4e79822ef50b865a92de20a1aad0cf7c1dec7b6662a07efb6665a3996cf/
Threat name:
Document-Excel.Trojan.Emotet
Create hunting rule
Status:
Malicious
First seen:
2022-07-05 09:05:07 UTC
File Type:
Document
Extracted files:
12
AV detection:
19 of 26 (73.08%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yuuojz4yelxvbodfvew6ecq2vugppqo6y63gmkqh563gmwrzs3hq._file
Result
Malware family:
emotet
Create hunting rule
Score:
  10/10
Tags:
family:emotet botnet:epoch4 banker macro suricata trojan xlm
Link:
https://tria.ge/reports/220705-k1622shfa2/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Gathers network information
Gathers system information
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of FindShellTrayWindow
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:
82.223.21.224:8080
173.212.193.249:8080
82.165.152.127:8080
151.106.112.196:8080
160.16.142.56:8080
163.44.196.120:8080
103.70.28.102:8080
164.68.99.3:8080
51.161.73.194:443
146.59.226.45:443
104.168.155.143:8080
101.50.0.91:8080
94.23.45.86:4143
167.172.253.162:8080
5.9.116.246:8080
185.4.135.165:8080
159.65.140.115:443
212.24.98.99:8080
209.97.163.214:443
206.189.28.199:8080
135.148.6.80:443
159.65.88.10:8080
79.137.35.198:8080
172.105.226.75:8080
172.104.251.154:8080
115.68.227.76:8080
201.94.166.162:443
144.91.78.55:443
183.111.227.137:8080
45.176.232.124:443
209.126.98.206:8080
72.15.201.15:8080
197.242.150.244:8080
51.254.140.238:7080
45.235.8.30:8080
103.75.201.2:443
207.148.79.14:8080
213.239.212.5:443
110.232.117.186:8080
153.126.146.25:7080
188.44.20.25:443
45.55.191.130:443
134.122.66.193:8080
131.100.24.231:80
186.194.240.217:443
64.227.100.222:8080
51.91.76.89:8080
159.89.202.34:443
149.56.131.28:8080
196.218.30.83:443
103.43.75.120:443
213.241.20.155:443
91.207.28.33:8080
129.232.188.93:443
119.193.124.41:7080
45.118.115.99:8080
158.69.222.101:443
150.95.66.124:8080
37.187.115.122:8080
107.170.39.149:8080
103.132.242.26:8080
1.234.2.232:8080
139.59.126.41:443
104.236.40.81:443
159.8.59.84:8080
136.243.32.168:443
1.234.21.73:7080
45.55.134.126:8080
34.85.105.209:8080
167.172.248.70:8080
146.59.151.250:443
217.79.180.211:8080
144.217.88.125:443
34.80.191.247:8080
201.73.143.120:7080
131.100.24.199:4143
49.231.16.102:8080
162.243.103.246:8080
103.224.242.13:8080
51.79.205.117:8080
45.93.136.110:7080
104.248.155.133:443
161.97.68.105:8080
69.63.64.48:8080
45.226.53.34:443
165.227.166.238:8080
51.91.142.26:443
138.197.68.35:8080
Dropper Extraction:
http://wp.eryaz.net/bayar1/gQ3C8aNR9773v0sWR/
https://yakosurf.com/wp-includes/n6ZMo/
http://zarzamora.com.mx/cgi-bin/bg7Q06nqt3DJRvH0/
http://zhivir.com/wp/g1bvvKyM/
Malware family:
Emotet
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c528e4e79822/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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

Excel file xls c528e4e79822ef50b865a92de20a1aad0cf7c1dec7b6662a07efb6665a3996cf

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments