MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 20af4fd7fbeb87c8c40946683190650b7234e19627d4412e19a8090706907e5a. 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: 6


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

SHA256 hash: 20af4fd7fbeb87c8c40946683190650b7234e19627d4412e19a8090706907e5a
SHA3-384 hash: 7e78443370a80854fdebda8ae01f0357e2eed26b15ea140b9965d419bda97331493bb25c79ad4e51f1b4a3b16ade03f8
SHA1 hash: 288e41fc3d120617d99b089fd975e11ae084ffa3
MD5 hash: c574cb01d2a394c3b879be05a4dbf476
humanhash: fix-connecticut-pasta-august
File name:Rechnung 2022.20.06_1232.xls
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:76'288 bytes
First seen:2022-06-21 08:20:58 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:VTOKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgTKHuS4NcTO9/z7UYdEJBI:VaKpb8rGYrMPe3q7Q0XV5xtezEsi8/dQ
TLSH T13D733A96B659CA9DFA25873149D747AA6323FC304F6B07433264B3257FFC9A04A0721B
TrID 80.2% (.XLS) Microsoft Excel sheet (32500/1/3)
19.7% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter TeamDreier
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: 6
OLE dump

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

Section IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
365851 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
SuspiciousURLDownloadToFileAMay download files from the Internet
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 :
196
Origin country :
n/a
Vendor Threat Intelligence
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
True
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/281825/
Detection(s):
SecuriteInfo.com.Macro.Downloader-17.UNOFFICIAL
Create hunting rule

Sanesecurity.Badmacro.XlsM.Urlmon1.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
Sending a custom TCP request
Creating a window
Сreating synchronization primitives
DNS request
Sending an HTTP GET request
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Link:
https://app.docguard.net/20af4fd7fbeb87c8c40946683190650b7234e19627d4412e19a8090706907e5a/results/dashboard
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
macros macros-on-open packed regsvr32
Link:
https://www.filescan.io/uploads/62b17fbcdbe9c7c949743bfb/reports/bacc56e7-e376-43ab-98d9-81b05fd76db8/overview
Label:
Malicious
Suspicious Score:
5.3/10
Score Malicious:
53%
Score Benign:
47%
Link:
https://www.malware.ai/gui/files/?id=142931ff-5836-4a14-9976-c449f5329989
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/20af4fd7fbeb87c8c40946683190650b7234e19627d4412e19a8090706907e5a
Details
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Result
Threat name:
Hidden Macro 4.0, Emotet
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1016884
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
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Yara detected Emotet
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 649380 Sample: Rechnung 2022.20.06_1232.xls Startdate: 21/06/2022 Architecture: WINDOWS Score: 100 45 129.232.188.93 xneeloZA South Africa 2->45 47 45.235.8.30 WIKINETTELECOMUNICACOESBR Brazil 2->47 49 58 other IPs or domains 2->49 63 Snort IDS alert for network traffic 2->63 65 Multi AV Scanner detection for domain / URL 2->65 67 Antivirus detection for URL or domain 2->67 69 11 other signatures 2->69 8 EXCEL.EXE 53 27 2->8         started        signatures3 process4 dnsIp5 57 bascoysonido.com.ar 104.156.58.29, 49174, 80 HVC-ASUS United States 8->57 59 bdtin.com 112.213.89.130, 49173, 80 SUPERDATA-AS-VNSUPERDATA-VN Viet Nam 8->59 61 basnetbd.com 167.86.113.96, 49175, 80 CONTABODE Germany 8->61 31 C:\Users\user\cui4.ocx, PE32+ 8->31 dropped 33 C:\Users\user\cui3.ocx, PE32+ 8->33 dropped 35 C:\Users\user\cui2.ocx, PE32+ 8->35 dropped 37 4 other malicious files 8->37 dropped 73 Document exploit detected (creates forbidden files) 8->73 75 Document exploit detected (UrlDownloadToFile) 8->75 13 regsvr32.exe 2 8->13         started        17 regsvr32.exe 2 8->17         started        19 regsvr32.exe 2 8->19         started        21 regsvr32.exe 8->21         started        file6 signatures7 process8 file9 39 C:\Windows\System32\...\tOjAqM.dll (copy), PE32+ 13->39 dropped 77 Hides that the sample has been downloaded from the Internet (zone.identifier) 13->77 23 regsvr32.exe 2 13->23         started        41 C:\Windows\System32\KiQJO\WSnX.dll (copy), PE32+ 17->41 dropped 27 regsvr32.exe 11 17->27         started        43 C:\Windows\System32\...\xOyMkazv.dll (copy), PE32+ 19->43 dropped 29 regsvr32.exe 11 19->29         started        signatures10 process11 dnsIp12 51 45.76.181.158, 443, 49176, 49177 AS-CHOOPAUS United States 23->51 71 System process connects to network (likely due to code injection or exploit) 23->71 53 139.162.113.169, 49179, 49180, 49181 LINODE-APLinodeLLCUS Netherlands 27->53 55 135.148.6.80, 443, 49185, 49186 AVAYAUS United States 27->55 signatures13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/20af4fd7fbeb87c8c40946683190650b7234e19627d4412e19a8090706907e5a/
Threat name:
Document-Excel.Trojan.Abracadabra
Create hunting rule
Status:
Malicious
First seen:
2022-06-20 10:43:32 UTC
File Type:
Document
Extracted files:
10
AV detection:
19 of 26 (73.08%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ecxu7v735od4rrajizuddedfbnzdjymwe7keclqzvaeqobuqpzna._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/220621-j8z32aefc3/
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:
82.165.152.127:8080
51.161.73.194:443
103.75.201.2:443
5.9.116.246:8080
213.241.20.155:443
79.137.35.198:8080
119.193.124.41:7080
186.194.240.217:443
172.105.226.75:8080
150.95.66.124:8080
131.100.24.231:80
94.23.45.86:4143
209.97.163.214:443
206.189.28.199:8080
173.212.193.249:8080
153.126.146.25:7080
51.91.76.89:8080
1.234.2.232:8080
163.44.196.120:8080
149.56.131.28:8080
146.59.226.45:443
45.118.115.99:8080
139.162.113.169:8080
196.218.30.83:443
212.24.98.99:8080
115.68.227.76:8080
64.227.100.222:8080
207.148.79.14:8080
209.126.98.206:8080
151.106.112.196:8080
45.186.16.18:443
167.172.253.162:8080
160.16.142.56:8080
72.15.201.15:8080
158.69.222.101:443
91.207.28.33:8080
103.70.28.102:8080
185.4.135.165:8080
144.91.78.55:443
82.223.21.224:8080
45.235.8.30:8080
135.148.6.80:443
188.44.20.25:443
101.50.0.91:8080
46.55.222.11:443
159.89.202.34:443
134.122.66.193:8080
45.176.232.124:443
164.68.99.3:8080
103.43.75.120:443
183.111.227.137:8080
45.76.181.158:443
107.170.39.149:8080
110.232.117.186:8080
159.65.140.115:443
51.254.140.238:7080
159.65.88.10:8080
103.132.242.26:8080
172.104.251.154:8080
37.187.115.122:8080
197.242.150.244:8080
129.232.188.93:443
201.94.166.162:443
Dropper Extraction:
http://bdtin.com/cache/4G8pl/
http://bascoysonido.com.ar/cgi-bin/AmUUPhWK6oTKLzHpl7zm/
http://basnetbd.com/ckfinder/K0a/
Malware family:
Emotet
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/20af4fd7fbeb/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/20af4fd7fbeb87c8c40946683190650b7234e19627d4412e19a8090706907e5a

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:exploit_any_poppopret
Create hunting rule
Author:Jeff White [karttoon@gmail.com] @noottrak
Description:Identify POP -> POP -> RET opcodes for quick ROP Gadget creation in target binaries.
Rule name:Qbot
Create hunting rule
Author:Dhanunjaya
Description:Yara Rule to Detect Qbot

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

SilentBuilder

Excel file xls 20af4fd7fbeb87c8c40946683190650b7234e19627d4412e19a8090706907e5a

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/281825/

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