Office (OLE) / .XLS malware analysis — malicious · 1d58da95826bb427

MALICIOUS

Office (OLE) / .XLS

61.0 KB Created: 2010-06-21 12:06:53 Authoring application: Microsoft Excel

MD5: 58ad7a36543c39072fa116554da2aa88 SHA-1: 64d912da642abb8736a15eb89e48db0dde9492dc SHA-256: 1d58da95826bb427fc43a5bfda8316afcce66b5bf3118adff296fc01eee2a27b

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is an Excel spreadsheet containing a VBA macro. The Auto_Open macro is present and uses CreateObject, indicating it's designed to execute code upon opening. This is a common technique for downloading and executing further malicious payloads. No specific family could be identified, but the execution method is clear.

Heuristics 5

Auto_Open macro high OLE_VBA_AUTO

Auto_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` `a2a58e884101f0bceb29e3f26bf1a2ef40fe0ef0c78567d52b83552c9ef104b2`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	29983 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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