MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ff6d5af8b24b7b230895ea480426cafbfddc0ebc1db440b741b2d740f7efd639. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ff6d5af8b24b7b230895ea480426cafbfddc0ebc1db440b741b2d740f7efd639
SHA3-384 hash: bf58e7b8062767859e2f2ea8fff14a92fe0b0fe49de96517a54d4cb7d0f9b5d7e0d007d39296a5cbb9ce155d289ce5ac
SHA1 hash: 1b5e59fb283aba363dc3cda2221d9be1e4056b5a
MD5 hash: 5599c93a7870ea2270452d6a39c69348
humanhash: monkey-connecticut-sodium-moon
File name:SecuriteInfo.com.Exploit.Siggen3.32798.32145.11943
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:72'192 bytes
First seen:2022-05-27 22:33:37 UTC
Last seen:Never
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 1536:OhKpb8rGYrMPe3q7Q0XV5xtezE8vG8UM+4+hDcnTLiQrRTZws8EV:uKpb8rGYrMPe3q7Q0XV5xtezE8vG8UMv
TLSH T177634B59B76A885EE9198B3048F747D62323FD308F6F0A433259F3926FB9590670390B
TrID 80.2% (.XLS) Microsoft Excel sheet (32500/1/3)
19.7% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter SecuriteInfoCom
Tags:SilentBuilder xlsx

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 IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
361813 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
AutoExecAuto_OpenRuns when the Excel Workbook is opened
SuspiciousWindowsMay enumerate application windows (if combined with Shell.Application object)
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 :
1
# of downloads :
537
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SecuriteInfo.com.Exploit.Siggen3.32798.32145.11943
Verdict:
Malicious activity
Analysis date:
2022-05-27 22:35:31 UTC
Tags:
macros loader
Link:
https://app.any.run/tasks/e675f05a-edc2-4660-b10c-0f3f5035434c

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/275110/
Detection(s):
SecuriteInfo.com.XLM.Trojan.Abracadabra.8.Gen.28418.25985.UNOFFICIAL
Create hunting rule

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

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

SecuriteInfo.com.Exploit.Siggen3.32798.32145.11943.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.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
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
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/ff6d5af8b24b7b230895ea480426cafbfddc0ebc1db440b741b2d740f7efd639/results/dashboard
Payload URLs
URL
File name
martinmichalek.com
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/6291521c3223462f89e608e1/reports/a8c79ebf-a083-4f24-9aa5-3972b1070966/overview
Label:
Malicious
Suspicious Score:
6.0/10
Score Malicious:
61%
Score Benign:
39%
Link:
https://www.malware.ai/gui/files/?id=d16d2621-839f-4205-823d-450508658708
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/ff6d5af8b24b7b230895ea480426cafbfddc0ebc1db440b741b2d740f7efd639
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/1003270
Signature
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)
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 signatures2 2 Behavior Graph ID: 635764 Sample: SecuriteInfo.com.Exploit.Si... Startdate: 29/05/2022 Architecture: WINDOWS Score: 100 40 Snort IDS alert for network traffic 2->40 42 Antivirus detection for URL or domain 2->42 44 Multi AV Scanner detection for dropped file 2->44 46 9 other signatures 2->46 7 EXCEL.EXE 7 20 2->7         started        process3 dnsIp4 34 martinmichalek.com 109.74.157.127, 49175, 80 VNET-ASSK Slovakia (SLOVAK Republic) 7->34 36 weplug.com 147.135.136.181, 49174, 80 OVHFR France 7->36 38 natayakim.com 31.31.198.218, 443, 49173 AS-REGRU Russian Federation 7->38 24 C:\Users\user\cusoa1.ocx, PE32+ 7->24 dropped 26 C:\Users\user\...\tZwDZf1Fd2kuat4sNjw[1].dll, PE32+ 7->26 dropped 28 SecuriteInfo.com.E...en3.32798.32145.xls, Composite 7->28 dropped 50 Document exploit detected (creates forbidden files) 7->50 52 Document exploit detected (UrlDownloadToFile) 7->52 12 regsvr32.exe 2 7->12         started        16 regsvr32.exe 7->16         started        18 regsvr32.exe 7->18         started        file5 signatures6 process7 file8 30 C:\Windows\System32\...\JcoVSRFf.dll (copy), PE32+ 12->30 dropped 54 Hides that the sample has been downloaded from the Internet (zone.identifier) 12->54 20 regsvr32.exe 2 12->20         started        signatures9 process10 dnsIp11 32 165.22.73.229, 49176, 8080 DIGITALOCEAN-ASNUS United States 20->32 48 System process connects to network (likely due to code injection or exploit) 20->48 signatures12
Gathering data
Threat name:
Document-Excel.Trojan.Emotet
Create hunting rule
Status:
Malicious
First seen:
2022-05-27 18:35:44 UTC
File Type:
Document
Extracted files:
9
AV detection:
19 of 40 (47.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=75wvv6fsjn5sgcev5jeaijwk7p65ydv4dw2ebn2bwllub57p2y4q._file
Result
Malware family:
emotet
Create hunting rule
Score:
  10/10
Tags:
family:emotet botnet:epoch5 banker macro suricata trojan xlm
Link:
https://tria.ge/reports/220527-2g3nysfah4/
Behaviour
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
Checks processor information in registry
Drops file in System32 directory
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:
194.9.172.107:8080
66.42.57.149:443
165.22.73.229:8080
202.29.239.162:443
104.248.225.227:8080
54.38.242.185:443
103.133.214.242:8080
78.47.204.80:443
210.57.209.142:8080
103.41.204.169:8080
118.98.72.86:443
88.217.172.165:8080
87.106.97.83:7080
85.25.120.45:8080
195.77.239.39:8080
37.44.244.177:8080
36.67.23.59:443
160.16.143.191:7080
54.38.143.246:7080
159.69.237.188:443
68.183.93.250:443
54.37.228.122:443
190.90.233.66:443
37.59.209.141:8080
178.62.112.199:8080
59.148.253.194:443
196.44.98.190:8080
202.28.34.99:8080
78.46.73.125:443
51.68.141.164:8080
207.148.81.119:8080
93.104.209.107:8080
185.148.168.220:8080
103.85.95.4:8080
62.171.178.147:8080
175.126.176.79:8080
134.122.119.23:8080
202.134.4.210:7080
116.124.128.206:8080
45.71.195.104:8080
110.235.83.107:7080
103.56.149.105:8080
68.183.91.111:8080
5.56.132.177:8080
195.154.146.35:443
217.182.143.207:443
54.37.106.167:8080
85.214.67.203:8080
188.225.32.231:4143
103.42.58.120:7080
139.196.72.155:8080
Dropper Extraction:
https://natayakim.com/_hlam/Ob78p6SxMNonofG/
http://weplug.com/dom/LfdeV8H4Zy1yLFRV/
http://martinmichalek.com/_sub/G1QKwEYPbt/
Malware family:
Emotet
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ff6d5af8b24b/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/ff6d5af8b24b7b230895ea480426cafbfddc0ebc1db440b741b2d740f7efd639

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.

Cape
Cape
https://www.capesandbox.com/analysis/275110/

Comments