MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 d25a928416c3614b40c4c57447023f53fa5cc4d4bd5dee5fc68a7e8cbc52d7cb. 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: 9
Maldoc score: 7
| SHA256 hash: | d25a928416c3614b40c4c57447023f53fa5cc4d4bd5dee5fc68a7e8cbc52d7cb |
|---|---|
| SHA3-384 hash: | b3dcf55eb0f170df260dafea54cd61c6e8244a1277040ed928b0430e38532e56c8d7c0c022806507ef406d0f902dcee6 |
| SHA1 hash: | a7c93a24bf99928b2b8cb83b18410574148d3e05 |
| MD5 hash: | f819678d3f3e6372ef8745d5cad36204 |
| humanhash: | idaho-burger-uniform-four |
| File name: | highlights86151613925.xls |
| Download: | download sample |
| Signature | SilentBuilder |
| File size: | 310'784 bytes |
| First seen: | 2021-12-01 16:29:01 UTC |
| Last seen: | 2021-12-01 19:11:22 UTC |
| File type: |  xls |
| MIME type: | application/vnd.ms-excel |
| ssdeep | 6144:W96FE76hr0d3n98AdwL3x2bVyyKC7AurVyJZOiKRrwJGIxe14y7nv:Nna6bQBn |
| TLSH | T18A64D6C66E64CDA1DBC4C271CE5D2A80D765FCD116098FC7B248A025BF2B1B9BB4F291 |
| Reporter |  ffforward |
| Tags: | Dridex 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: 7 |
OLE dump
MalwareBazaar was able to identify 4 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| 1 | 114 bytes | CompObj |
| 2 | 388 bytes | DocumentSummaryInformation |
| 3 | 208 bytes | SummaryInformation |
| 4 | 304778 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_Close | Runs when the Excel Workbook is closed |
| Suspicious | EXEC | May run an executable file or a system |
| 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 :
2
# of downloads :
195
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
highlights86151613925.xls
Verdict:
No threats detected
Analysis date:
2021-12-01 16:32:15 UTC
Tags:
macros macros40
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:
False
Detection:
n/a
Result
Verdict:
Malware
Maliciousness:
Behaviour
DNS request
Creating a window
Сreating synchronization primitives
Searching for the window
Creating a file
Creating a process with a hidden window
Launching a process
Sending an HTTP GET request
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:
macros macros-on-close macros-on-open mshta stripped
Result
Threat name:
Hidden Macro 4.0 Dridex Downloader
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Contains functionality to create processes via WMI
Creates and opens a fake document (probably a fake document to hide exploiting)
Creates processes via WMI
Document exploit detected (process start blacklist hit)
Found Excel 4.0 Macro with suspicious formulas
Found malicious Excel 4.0 Macro
Found obfuscated Excel 4.0 Macro
Found protected and hidden Excel 4.0 Macro sheet
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Sigma detected: Microsoft Office Product Spawning Windows Shell
Yara detected Dridex Downloader
Behaviour
Behavior Graph:
Threat name:
Document-Excel.Infostealer.Dridex
Status:
Malicious
First seen:
2021-12-01 16:29:09 UTC
File Type:
Document
Extracted files:
8
AV detection:
18 of 28 (64.29%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
10/10
Tags:
macro xlm
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Blocklisted process makes network request
Process spawned unexpected child process
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: | BitcoinAddress |
|---|---|
| Author: | Didier Stevens (@DidierStevens) |
| Description: | Contains a valid Bitcoin address |
| Rule name: | Excel_Hidden_Macro_Sheet |
|---|
| Rule name: | Excel_Hidden_Macro_Sheet |
|---|
| Rule name: | INDICATOR_OLE_Excel4Macros_DL2 |
|---|---|
| Author: | ditekSHen |
| Description: | Detects OLE Excel 4 Macros documents acting as downloaders |
| Rule name: | multiple_concats_in_excel4_exec_enjoy_the_silence |
|---|---|
| Author: | Will Metcalf |
| Description: | Behold The Great And Powerful Match Iterator. Multiple Concats with register Function SILENT BUILDER EDITION |
| Reference: | https://blog.reversinglabs.com/blog/excel-4.0-macros |
| Rule name: | multiple_concats_in_excel4_formula_exec_1 |
|---|---|
| Author: | Will Metcalf |
| Description: | Behold The Great And Powerful Match Iterator. Multiple Concats Inside of exec Function |
| Reference: | https://blog.reversinglabs.com/blog/excel-4.0-macros |
| 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.
Malspam
Delivery method
Distributed via e-mail attachment
Comments
Login required
You need to login to in order to write a comment. Login with your abuse.ch account.Webserver for sample (still up):
hxxp://149.129.254.152:8080/6tfcnfucknugget4gpenis3dade5z6cpc
Payload URLs (still up):
hxxps://cdn.discordapp.com/attachments/911246617275957290/915526473467719720/KsXtuXmxoZvgudVwhoreniggagay.bin
hxxps://cdn.discordapp.com/attachments/911246617275957290/915526461379727370/GYRxsMXKtvwSwhoreniggagay.bin
hxxps://cdn.discordapp.com/attachments/911246617275957290/915526468073848872/xTpcaEZvwmHqwhoreniggagay.bin