MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b3920ede40455fca2fbb1edfc6299d2491fded7fa6e7fddb4a1fd4f74bfda921. 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: 10


Intelligence 13 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b3920ede40455fca2fbb1edfc6299d2491fded7fa6e7fddb4a1fd4f74bfda921
SHA3-384 hash: 00da47c7836994a7551fbb6a5a206776e4cb1a18f631c2035801daea92513b27002611ff412cfaa5e4f5a18237db4569
SHA1 hash: ff2cfa2b10ab631064a1a108fe84a4eb3770451f
MD5 hash: 120b24a43b5c01360440a62e99f5c162
humanhash: idaho-alaska-network-fix
File name:SICK OF EMOTET THANKS.xls
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:96'768 bytes
First seen:2022-06-29 11:22:41 UTC
Last seen:2022-07-04 16:30:31 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:NFKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgMHuS4hcTO97v7UYdEJmO:3Kpb8rGYrMPe3q7Q0XV5xtezEsi8/dgQ
TLSH T1B0935B45B69ADA5EF521833148E787A67333FC304F6B47472268B3257FB99A04B0721B
TrID 80.2% (.XLS) Microsoft Excel sheet (32500/1/3)
19.7% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter pr0xylife
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 IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
386111 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
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)
SuspiciousXLM macroXLM macro found. It may contain malicious code

Intelligence

File Origin
# of uploads :
3
# of downloads :
238
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
1656505248-1676fd2983bdb80001-ew2K6O.eml
Verdict:
Malicious activity
Analysis date:
2022-06-29 13:24:03 UTC
Tags:
loader
Link:
https://app.any.run/tasks/edcb5df1-93d6-428f-8144-155f49b58175

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/284223/
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 an HTTP GET request
Sending a custom TCP request 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/b3920ede40455fca2fbb1edfc6299d2491fded7fa6e7fddb4a1fd4f74bfda921/results/dashboard
Payload URLs
URL
File name
bramynapilota.com.pl
WorkBook
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/62bc3654114aa383d0ec7362/reports/396872a3-65e6-460f-8713-2a0bcb332be5/overview
Label:
Benign
Suspicious Score:
3.6/10
Score Malicious:
37%
Score Benign:
63%
Link:
https://www.malware.ai/gui/files/?id=5b176100-9884-4f3d-9029-e10b979c6082
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/b3920ede40455fca2fbb1edfc6299d2491fded7fa6e7fddb4a1fd4f74bfda921
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/1021839
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
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
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 654335 Sample: SICK OF EMOTET THANKS.xls Startdate: 29/06/2022 Architecture: WINDOWS Score: 100 41 129.232.188.93 xneeloZA South Africa 2->41 43 45.235.8.30 WIKINETTELECOMUNICACOESBR Brazil 2->43 45 60 other IPs or domains 2->45 55 Multi AV Scanner detection for domain / URL 2->55 57 Antivirus detection for URL or domain 2->57 59 Found malicious Excel 4.0 Macro 2->59 61 8 other signatures 2->61 8 EXCEL.EXE 33 26 2->8         started        signatures3 process4 dnsIp5 49 www.drcno.sk 109.74.157.127, 49175, 80 VNET-ASSK Slovakia (SLOVAK Republic) 8->49 51 caravanasitsaso.es 82.223.128.138, 49174, 80 ONEANDONE-ASBrauerstrasse48DE Spain 8->51 53 2 other IPs or domains 8->53 29 C:\Users\user\sctm3.ocx, PE32+ 8->29 dropped 31 C:\Users\user\sctm1.ocx, PE32+ 8->31 dropped 33 C:\Users\user\AppData\...\rNAX0E2Q8F[1].dll, PE32+ 8->33 dropped 35 2 other malicious files 8->35 dropped 65 Document exploit detected (creates forbidden files) 8->65 67 Document exploit detected (UrlDownloadToFile) 8->67 13 regsvr32.exe 2 8->13         started        17 regsvr32.exe 2 8->17         started        19 regsvr32.exe 8->19         started        21 regsvr32.exe 8->21         started        file6 signatures7 process8 file9 37 C:\Windows\System32\...\kndbhRAB.dll (copy), PE32+ 13->37 dropped 69 Hides that the sample has been downloaded from the Internet (zone.identifier) 13->69 23 regsvr32.exe 13->23         started        39 C:\Windows\...\XFLuAcdoaDLmFzf.dll (copy), PE32+ 17->39 dropped 27 regsvr32.exe 17->27         started        signatures10 process11 dnsIp12 47 45.55.191.130, 443, 49176, 49177 DIGITALOCEAN-ASNUS United States 23->47 63 System process connects to network (likely due to code injection or exploit) 23->63 signatures13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b3920ede40455fca2fbb1edfc6299d2491fded7fa6e7fddb4a1fd4f74bfda921/
Threat name:
Document-Excel.Trojan.Abracadabra
Create hunting rule
Status:
Malicious
First seen:
2022-06-29 11:23:05 UTC
File Type:
Document
Extracted files:
11
AV detection:
18 of 25 (72.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=woja5xsaivp4ul53d3p4mkm5esi733l7u3t73w2kd7kpos75veqq._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/220629-ng4z5ahbak/
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:
172.104.251.154:8080
51.161.73.194:443
101.50.0.91:8080
91.207.28.33:8080
119.193.124.41:7080
150.95.66.124:8080
103.132.242.26:8080
37.187.115.122:8080
172.105.226.75:8080
131.100.24.231:80
196.218.30.83:443
79.137.35.198:8080
103.75.201.2:443
82.223.21.224:8080
153.126.146.25:7080
146.59.226.45:443
209.97.163.214:443
186.194.240.217:443
197.242.150.244:8080
45.118.115.99:8080
201.94.166.162:443
159.65.88.10:8080
213.239.212.5:443
167.172.253.162:8080
183.111.227.137:8080
207.148.79.14:8080
188.44.20.25:443
185.4.135.165:8080
82.165.152.127:8080
64.227.100.222:8080
163.44.196.120:8080
173.212.193.249:8080
115.68.227.76:8080
107.170.39.149:8080
72.15.201.15:8080
51.254.140.238:7080
206.189.28.199:8080
45.176.232.124:443
144.91.78.55:443
159.65.140.115:443
160.16.142.56:8080
135.148.6.80:443
51.91.76.89:8080
103.43.75.120:443
46.55.222.11:443
94.23.45.86:4143
149.56.131.28:8080
213.241.20.155:443
164.68.99.3:8080
209.126.98.206:8080
129.232.188.93:443
45.55.191.130:443
103.70.28.102:8080
5.9.116.246:8080
139.59.126.41:443
151.106.112.196:8080
134.122.66.193:8080
212.24.98.99:8080
110.232.117.186:8080
1.234.2.232:8080
45.235.8.30:8080
158.69.222.101:443
159.89.202.34:443
Dropper Extraction:
http://camcha.cl/wp-admin/uaGdFOaYvx9p0sHuur/
http://bramynapilota.com.pl/wp-admin/xCZp8SgBtmxELi/
http://caravanasitsaso.es/wp-content/dYbHrCM41ZJ9/
http://www.drcno.sk/_sub/kweb8e/
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/b3920ede40455fca2fbb1edfc6299d2491fded7fa6e7fddb4a1fd4f74bfda921

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.

Cape
Cape
https://www.capesandbox.com/analysis/284223/

Comments