MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 72c173db6d117938cd5ac0615728a10ec8fad24a57707f362122f8dc36536ccd. 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: 12


Maldoc score: 5


Intelligence 12 IOCs YARA 2 File information Comments

SHA256 hash: 72c173db6d117938cd5ac0615728a10ec8fad24a57707f362122f8dc36536ccd
SHA3-384 hash: cac2895cf791b7708d18c180bceaa6b516a725d817daa3fda547dadeaba28c382d463670fc37bfeb79913ea73bf971dc
SHA1 hash: 754513d7b90d0b09e663d00df71b0358cde9b691
MD5 hash: cda6d5ea07d4a9d6ca9a6405ae1753e3
humanhash: chicken-undress-shade-twenty
File name:tmp0ocsdvwv
Download: download sample
Signature SilentBuilder
File size:91'874 bytes
First seen:2022-01-28 15:27:36 UTC
Last seen:2022-02-01 16:19:53 UTC
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 1536:8xIk3hbdlylKsgqopeJBWhZFGkE+cL2NdA/6yH5Eb7EdrpFkkGX/sGC6ORQQDBh+:8Sk3hbdlylKsgqopeJBWhZFGkE+cL2Nx
TLSH T119934B1BA98648C5E66D47F4E0625AE9BE63EF45FA433ED321107FC63AB41434C0B17A
Reporter Cryptolaemus1
Tags:Emotet epoch5 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: 5
OLE dump

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

Section IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
381211 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
IOC91.240.118.172IPv4 address
SuspiciousEXECMay run an executable file or a system
SuspiciousXLM macroXLM macro found. It may contain malicious code

Intelligence


File Origin
# of uploads :
24
# of downloads :
106
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
tmp0ocsdvwv
Verdict:
Malicious activity
Analysis date:
2022-01-28 15:44:44 UTC
Tags:
macros macros40 emotet-doc emotet opendir loader

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Has a screenshot:
False
Contains macros:
True
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Launching cmd.exe command interpreter
Launching a process
Running batch commands by exploiting the app vulnerability
Sending an HTTP GET request to an infection source
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Payload URLs
URL
File name
http://91.240.118.172/ee/ss/se.html
Macro3
Document image
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd cmd.exe macros macros-on-open stripped
Label:
Benign
Suspicious Score:
3.7/10
Score Malicious:
38%
Score Benign:
62%
Result
Verdict:
MALICIOUS
Details
Excel 4.0 Macro
Document contains Excel 4.0 macros (XLM). A valid, albeit dated feature, this document should be treated with suspicion.
IPv4 Dotted Quad URL
A URL was detected referencing a direct IP address, as opposed to a domain name.
Macro Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
MSHTA Pivot
Macro may contain a pivot to an external URL resource via MSHTA.
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Document With No Content
Document contains little or no semantic information.
Threat name:
Document-Excel.Trojan.Emotet
Status:
Malicious
First seen:
2022-01-28 15:28:08 UTC
File Type:
Document
Extracted files:
7
AV detection:
5 of 43 (11.63%)
Threat level:
  5/5
Result
Malware family:
Score:
  10/10
Tags:
family:emotet botnet:epoch5 banker macro suricata trojan xlm
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 AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Drops file in System32 directory
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Emotet
Process spawned unexpected child process
suricata: ET MALWARE W32/Emotet CnC Beacon 3
Malware Config
C2 Extraction:
159.69.43.124:8080
45.79.80.198:443
207.148.81.119:8080
128.199.192.135:8080
118.98.72.86:443
217.182.143.207:443
168.197.250.14:80
116.124.128.206:8080
78.46.73.125:443
185.148.168.15:8080
195.154.146.35:443
85.214.67.203:8080
194.9.172.107:8080
59.148.253.194:443
210.57.209.142:8080
54.38.242.185:443
195.77.239.39:8080
159.69.237.188:443
104.131.62.48:8080
62.171.178.147:8080
142.4.219.173:8080
66.42.57.149:443
78.47.204.80:443
190.90.233.66:443
54.37.228.122:443
185.168.130.138:443
191.252.103.16:80
37.59.209.141:8080
185.148.168.220:8080
37.44.244.177:8080
203.153.216.46:443
45.13.132.26:8080
Dropper Extraction:
http://91.240.118.172/ee/ss/se.html
http://91.240.118.172/ee/ss/se.png
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:Excel_Hidden_Macro_Sheet
Rule name:SUSP_Excel4Macro_AutoOpen
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.

Comments