MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 4b4bcdcc293f734c7504ef54fbc90c4399210a0617a8f25e5c660d5735b1d7dd. 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
Threat unknown
Vendor detections: 10
Maldoc score: 23
| SHA256 hash: | 4b4bcdcc293f734c7504ef54fbc90c4399210a0617a8f25e5c660d5735b1d7dd |
|---|---|
| SHA3-384 hash: | 3171b8961f11387073ec117912f04f55366e03e3f182b5eb18cdc8d7dc03808b30f4605ec9a03a8911797eeeb5bc9fa0 |
| SHA1 hash: | ad538c08df7228628f680302f548eecf6c5a2fa1 |
| MD5 hash: | b21053de4824f2d8197cf3deebbcb96f |
| humanhash: | cola-quiet-oregon-video |
| File name: | b21053de4824f2d8197cf3deebbcb96f |
| Download: | download sample |
| File size: | 542'720 bytes |
| First seen: | 2022-03-09 15:00:40 UTC |
| Last seen: | Never |
| File type: |  xlsx |
| MIME type: | application/vnd.ms-excel |
| ssdeep | 6144:JK1Tgbyw3sz25o16yN9rjXjIKs2ATlFeIgiEoiTSPN0TMTMxr8b4S0Wu3IjxXp1:wIlgSFPM58br0Wu3c |
| TLSH | T10DB403AABDF79F7AD61291330BE910E66325C8411F354BC3196C793C39EEEA4394904E |
| Reporter |  zbetcheckin |
| Tags: | excel 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: 23 |
OLE dump
MalwareBazaar was able to identify 11 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| 1 | 109 bytes | CompObj |
| 2 | 240 bytes | DocumentSummaryInformation |
| 3 | 208 bytes | SummaryInformation |
| 4 | 517153 bytes | Workbook |
| 5 | 476 bytes | _VBA_PROJECT_CUR/PROJECT |
| 6 | 110 bytes | _VBA_PROJECT_CUR/PROJECTwm |
| 7 | 1007 bytes | _VBA_PROJECT_CUR/VBA/EstaPasta_de_trabalho |
| 8 | 9595 bytes | _VBA_PROJECT_CUR/VBA/Mdulo1 |
| 9 | 990 bytes | _VBA_PROJECT_CUR/VBA/Plan1 |
| 10 | 3342 bytes | _VBA_PROJECT_CUR/VBA/_VBA_PROJECT |
| 11 | 700 bytes | _VBA_PROJECT_CUR/VBA/dir |
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 |
| IOC | unzip.bat | Executable file name |
| IOC | avaliacao.bat | Executable file name |
| IOC | OneDriveStart.vbs | Executable file name |
| IOC | DynamicDrivers.vbs | Executable file name |
| IOC | OneDrive.hta | Executable file name |
| Suspicious | ExpandEnvironmentStr | May read system environment variables |
| Suspicious | CreateTextFile | May create a text file |
| Suspicious | Shell | May run an executable file or a system command |
| Suspicious | WScript.Shell | May run an executable file or a system command |
| Suspicious | Run | May run an executable file or a system command |
| Suspicious | Create | May execute file or a system command through WMI |
| Suspicious | CreateObject | May create an OLE object |
| Suspicious | Windows | May enumerate application windows (if combined with Shell.Application object) |
| Suspicious | Lib | May run code from a DLL |
| Suspicious | Hex Strings | Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
| Suspicious | Base64 Strings | Base64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
Intelligence
File Origin
# of uploads :
1
# of downloads :
143
Origin country :
n/a
Vendor Threat Intelligence
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
Creating a window
Сreating synchronization primitives
Creating a file
Moving a recently created file
Creating a process with a hidden window
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
macros macros-on-open schtasks.exe update.exe virus
Label:
Benign
Suspicious Score:
2.4/10
Score Malicious:
24%
Score Benign:
76%
Result
Verdict:
MALICIOUS
Link:
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Macro with File System Write
Detected macro logic that can write data to the file system.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
EXE String Concatenation
Macro contains a possibly obfuscated reference to an executable.
InQuest Machine Learning
An InQuest machine-learning model classified this macro as potentially malicious.
Result
Threat name:
Unknown
Detection:
malicious
Classification:
rans.expl.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
Document contains an embedded macro with GUI obfuscation
Document contains an embedded VBA macro which may execute processes
Document contains an embedded VBA macro with suspicious strings
Document contains an embedded VBA with many string operations indicating source code obfuscation
Document contains OLE streams with names of living off the land binaries
Document exploit detected (process start blacklist hit)
Multi AV Scanner detection for submitted file
Sigma detected: Copying Sensitive Files with Credential Data
Sigma detected: New RUN Key Pointing to Suspicious Folder
Sigma detected: Ryuk Ransomware
Sigma detected: Suspicious Remote Thread Created
Sigma detected: Suspicius Schtasks From Env Var Folder
Uses cmd line tools excessively to alter registry or file data
Uses schtasks.exe or at.exe to add and modify task schedules
Uses shutdown.exe to shutdown or reboot the system
Behaviour
Behavior Graph:
Threat name:
Script-Macro.Trojan.Maldokn
Status:
Malicious
First seen:
2022-02-26 01:21:17 UTC
File Type:
Document
Extracted files:
15
AV detection:
17 of 27 (62.96%)
Threat level:
5/5
Result
Malware family:
n/a
Score:
10/10
Tags:
macro macro_on_action persistence
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Adds Run key to start application
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:
0.80
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
xlsx 4b4bcdcc293f734c7504ef54fbc90c4399210a0617a8f25e5c660d5735b1d7dd
(this sample)
Delivery method
Distributed via web download
Comments
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You need to login to in order to write a comment. Login with your abuse.ch account.url : hxxp://securelogonweb.com/excel/Carteira-Investidores-Clientes-Quentes_001.xls