Office (OLE) malware analysis — malicious · d81f5368e41092ea

MALICIOUS

Office (OLE)

491.0 KB Created: 2008-03-26 10:58:49 Authoring application: Microsoft Excel

MD5: c847d2f15e3f40a925f5176ee2e2ae9f SHA-1: 7dcdd2f4814f23f036d4f453e8705d4ac0e920a2 SHA-256: d81f5368e41092ea39d9003f2209aa182a0d2a5b5946cd2d00885563454927b9

220 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is an Office document containing a Workbook_Open VBA macro, which is a common technique for initial execution. The macro utilizes CreateObject and GetObject calls, indicating it attempts to interact with the system or download additional content. The presence of a 'macros.bas' file further confirms the macro-based nature of the threat. The likely intent is to download and execute a second-stage payload.

Heuristics 6

Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject 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` `b8feffdd5c1ad516d71eba8359a11806b2cd8f70a912159da839953cc80790c8`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	71458 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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