Office (OLE) / .XLS malware analysis — malicious · 3124172b03bc03af

MALICIOUS

Office (OLE) / .XLS

1.32 MB Created: 2006-02-14 17:35:43 Authoring application: Microsoft Excel

MD5: a764ca9db15e6cfc28903792623cdb58 SHA-1: 35be22238bd34aba4b9958f21ba6f1e710adb772 SHA-256: 3124172b03bc03af79f6189ec5b4bed39d8fb6ae8347fc27413934867ced1352

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.003 Windows Command Shell T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample contains VBA macros, including a Workbook_Open auto-execution routine, which is a common technique for malware delivery. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a shell, suggesting an attempt to trick the user into executing commands. No specific family could be identified, but the presence of macros and the execution lure point to a downloader or initial access stage.

Heuristics 7

Reference to WinExec API high SC_STR_WINEXEC

Reference to WinExec API
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.
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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` `3f52f724af4ad7f39615e5cbf0a6420f9008ab9eb6282eac672d021c24dbac09`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	433224 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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