MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 f5888c38941b009b9302890c86032eac3391483d0fc8ba63927141400d587a24. 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
| SHA256 hash: | f5888c38941b009b9302890c86032eac3391483d0fc8ba63927141400d587a24 |
|---|---|
| SHA3-384 hash: | 4e9729ddea61a328099f5cfe11d2a165735625863d5f9918cf1125feb5a589b09724554bf7ec514ab2581a6f41ed84be |
| SHA1 hash: | 48074f966b45226d373368819e81c7046c647935 |
| MD5 hash: | bf48aac213c1ff77d3de10530dbaf80d |
| humanhash: | texas-beer-sixteen-utah |
| File name: | 2022-05-13_1747.xls |
| Download: | download sample |
| Signature | SilentBuilder |
| File size: | 80'384 bytes |
| First seen: | 2022-05-13 08:57:52 UTC |
| Last seen: | Never |
| File type: |  xls |
| MIME type: | application/vnd.ms-excel |
| ssdeep | 1536:oHKpb8rGYrMPe3q7Q0XV5xtezEsi8/dg6dXTZhqEw+PmwEJ8zobcG13GW8eJwVUv:YKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgL |
| TLSH | T152735C45BA5D9C5DE522873548D6839AE223FC116FAB0B473245F365BFF4AE08B0360B |
| TrID | 80.2% (.XLS) Microsoft Excel sheet (32500/1/3) 19.7% (.) Generic OLE2 / Multistream Compound (8000/1) |
| Reporter |  pr0xylife |
| Tags: | Emotet epoch4 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 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 | 70043 bytes | Workbook |
Intelligence
File Origin
# of uploads :
1
# of downloads :
325
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
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
Sending a custom TCP request
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
Document image
Image:
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
greyware macros macros-on-open packed regsvr32
Label:
Malicious
Suspicious Score:
5.6/10
Score Malicious:
57%
Score Benign:
43%
Result
Verdict:
MALICIOUS
Link:
Details
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Result
Threat name:
Hidden Macro 4.0
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
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)
Office process drops PE file
System process connects to network (likely due to code injection or exploit)
Behaviour
Behavior Graph:
Threat name:
Document-Excel.Trojan.Emotet
Status:
Malicious
First seen:
2022-05-13 08:56:22 UTC
File Type:
Document
Extracted files:
9
AV detection:
17 of 26 (65.38%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
emotet
Score:
10/10
Tags:
family:emotet 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 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
Dropper Extraction:
https://immobilgolfo.it/cgi-bin/Uf/
Verdict:
Malicious
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.
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