Office (OLE) / .XLS malware analysis — malicious · 94f060322689816c

MALICIOUS

Office (OLE) / .XLS

172.5 KB Created: 2007-06-20 21:02:50 Authoring application: Microsoft Excel

MD5: 1c36f82ed9b71b486e96cd697bc40cef SHA-1: 6f3511bf74c56384ce384b98831a992a46726d28 SHA-256: 94f060322689816c921b2c7acd03f2291b9b6010cad21bdd5822bcd28c63b2a3

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

This XLS file contains a Workbook_Open VBA macro, which is a common technique for initial execution. The macro utilizes a CreateObject call, indicating an attempt to instantiate and run an object, likely for malicious purposes such as downloading a second-stage payload. The presence of VBA Chr string obfuscation further suggests an effort to evade detection.

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` `685b90bb60304e74bb1251024f01dfc32c01ab227338f279d59e6da60764d624`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	51965 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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