MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 f93414304904cf04ee75d5594bbd6b17a29aeea92d9e719a3e53ae25e077c08a. 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: 5
| SHA256 hash: | f93414304904cf04ee75d5594bbd6b17a29aeea92d9e719a3e53ae25e077c08a |
|---|---|
| SHA3-384 hash: | 455deae96a83b683b56a112f167d0ef1e2e35b974e79822db75beed5ade2aa48de5dda564d6a81caf4a7039c0cf4fc1f |
| SHA1 hash: | 7c891b4ea5beb022c44a0c576bb143cc764867ad |
| MD5 hash: | a1a5f1d58cb7176ce30a3e4182332173 |
| humanhash: | kansas-nitrogen-coffee-eight |
| File name: | a1a5f1d58cb7176ce30a3e4182332173 |
| Download: | download sample |
| Signature | SilentBuilder |
| File size: | 131'991 bytes |
| First seen: | 2022-01-17 22:55:03 UTC |
| Last seen: | Never |
| File type: |  xlsx |
| MIME type: | application/vnd.ms-excel |
| ssdeep | 3072:Wuk3hbdlylKsgqopeJBWhZFGkE+cL2NdAxEvN8B/W6X1yxYovrepMUdQ6gSz4i:Fk3hbdlylKsgqopeJBWhZFVE+W2NdAmv |
| TLSH | T1E2D3AE03A5458F86D54C83B47F5745C46F03AE1CEAF62ACF2542BB133B7ABB1490A52E |
| Reporter |  zbetcheckin |
| Tags: | excel 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 ID | Section size | Section name |
|---|---|---|
| 1 | 4096 bytes | DocumentSummaryInformation |
| 2 | 4096 bytes | SummaryInformation |
| 3 | 120088 bytes | Workbook |
OLE vba
MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:
| Type | Keyword | Description |
|---|---|---|
| AutoExec | Auto_Open | Runs when the Excel Workbook is opened |
| Suspicious | Hex Strings | Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
| Suspicious | XLM macro | XLM macro found. It may contain malicious code |
Intelligence
File Origin
# of uploads :
1
# of downloads :
266
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a1a5f1d58cb7176ce30a3e4182332173
Verdict:
Malicious activity
Analysis date:
2022-01-18 00:00:11 UTC
Tags:
macros macros40 loader trojan
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
Detection:
n/a
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
DNS request
Sending a custom TCP request
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
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
Document image
Image:
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
cmd cmd.exe excel.exe macros macros-on-open mshta mshta.exe print.exe stripped
Label:
Malicious
Suspicious Score:
8.1/10
Score Malicious:
81%
Score Benign:
19%
Result
Verdict:
MALICIOUS
Link:
Details
Excel 4.0 Macro
Document contains Excel 4.0 macros (XLM). A valid, albeit dated feature, this document should be treated with suspicion.
Macro Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Document With Minimal Content
Document contains less than 1 kilobyte of semantic information.
Result
Threat name:
Hidden Macro 4.0
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Signature
Antivirus detection for URL or domain
Document exploit detected (process start blacklist hit)
Found Excel 4.0 Macro with suspicious formulas
Hides that the sample has been downloaded from the Internet (zone.identifier)
Machine Learning detection for dropped file
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Obfuscated command line found
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Powershell drops PE file
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: MSHTA Spawning Windows Shell
Sigma detected: Suspicious MSHTA Process Patterns
Sigma detected: Suspicious PowerShell Command Line
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Behaviour
Behavior Graph:
Threat name:
Document-Excel.Trojan.Emotet
Status:
Malicious
First seen:
2022-01-17 22:55:12 UTC
File Type:
Document
Extracted files:
7
AV detection:
17 of 27 (62.96%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
emotet
Score:
10/10
Tags:
family:emotet banker macro suricata trojan xlm
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Enumerates physical storage devices
Program crash
Drops file in System32 directory
Checks computer location settings
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
Dropper Extraction:
http://0xb907d607/cc.html
http://185.7.214.7/PP91.PNG
http://185.7.214.7/PP91.PNG
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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: | Qbot |
|---|---|
| Author: | Dhanunjaya |
| Description: | Yara Rule to Detect Qbot |
| 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.
Web download
Delivery method
Distributed via web download
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