Office (OLE) / .XLSX malware analysis — malicious · eaa7463b67c21b13

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 3ab3917577838548207819f05eed27ca SHA-1: 0866d0ef2295924f0a643f52e06633c75deb890b SHA-256: eaa7463b67c21b13d169e608465a821d18d3d3fccf97bfc12348df3d37a60da1

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

The Workbook_Open macro is designed to execute arbitrary commands. It uses CreateObject to instantiate Wscript.Shell and Scripting.FileSystemObject, indicating an intent to download and execute further payloads. The script attempts to download files from multiple URLs, including 'http://goyaluaat.vmeshaa.in/0v6kcny/CG/' and 'https://mars.srl/wp-admin/7Ffk6LN2X s2W/', and save them as 'c:\programdata\jledshf.bat' and 'c:\programdata\sduoixo.vbs'. The macro also contains obfuscated strings that appear to be encoded URLs, further supporting the download and execution of malicious content.

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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