Office (OLE) / .XLS malware analysis — malicious · 8ea822f230a46804

MALICIOUS

Office (OLE) / .XLS

34.0 KB Created: 2010-03-09 09:27:05 Authoring application: Microsoft Excel

MD5: 4756f8455bc36d6cfcfe4dfda97728a0 SHA-1: 57fb9d35aba724fa6ae325943871719dea251244 SHA-256: 8ea822f230a46804d56b08ae566c89bc52d9427b7ec07b1926c2237281a5aff1

200 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell

The sample is an Excel file containing VBA macros. The presence of an Auto_Open macro and a Shell() call within the VBA code indicates that the macro is designed to execute arbitrary commands upon opening the document. This is a common technique for delivering secondary payloads. No specific family could be identified, but the execution method is clear.

Heuristics 5

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
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` `5e640152159cd5070c465d70d0a5e376515f0704de8e9b15a96284949667d044`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1435 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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