Office (OLE) / .XLS malware analysis — malicious · 7dce54e79bbe10ec

MALICIOUS

Office (OLE) / .XLS

130.5 KB Created: 2001-07-13 09:51:45 Authoring application: Microsoft Excel

MD5: 854c61cc59fdb02c0f3162f8e674a384 SHA-1: c234cd28f8258a6cddf9bafac9b648cf778af03c SHA-256: 7dce54e79bbe10ec0ba2c475759e89582521df8afb16482e25d4003d71b178c0

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.002 Spearphishing Attachment

The file is an Excel spreadsheet containing VBA macros. The Workbook_Open macro is present and configured to execute code using CreateObject, a common technique for downloading and executing additional payloads. The presence of a Workbook_Open macro and CreateObject call strongly suggests a malicious intent to compromise the user's system. No specific family could be identified, and no external IOCs were extracted.

Heuristics 5

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` `8dab9a9fd2fe59e74eba79e50463069849965f4d1f90d3926db84ed36dffd824`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	12758 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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