Office (OLE) / .XLSX malware analysis — malicious · 3de5250180e7a604

MALICIOUS

Office (OLE) / .XLSX

142.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: 624495eb2cf7509360a6a9e8fa1d895b SHA-1: 82901b52521afbcda338b2f85bfe58070ad97002 SHA-256: 3de5250180e7a604efeb7e2a3d5efe4fa13ad5c7f4cfe7435eb2668d33afa9f8

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1059.005 Visual Basic

The file contains VBA macros, specifically a Workbook_Open event, which is designed to execute arbitrary commands. The script utilizes Wscript.Shell and Scripting.FileSystemObject to create and execute batch and VBScript files from the ProgramData directory. The reconstructed URL "http://goyaluaa.vmesha.in/0v6kcny/CG/ ,https://mars.srl/wp-admin/7Ffk6LN2X s2W/,http://franmuler.es/mbx/8c5RBJx6/,http://varafood.com/Ajax/cnM91G/,https://7jcata.com/wp-content/t/,http://blog.centralhome.h" indicates a clear intent to download and execute a second-stage payload. The ClamAV detection further supports its malicious nature.

Heuristics 7

ClamAV: Doc.Malware.Valyria-10004384-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-10004384-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `527d0656a0c2c323955d068683ef8f7e20c035cda247a1e24383595c0eb3403b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	7821 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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