Office (OLE) / .XLS malware analysis — malicious · 28b4909ad9179f90

MALICIOUS

Office (OLE) / .XLS

107.5 KB Created: 2008-03-27 09:53:01 Authoring application: Microsoft Excel

MD5: f7d24f4c46005090bcc2b65f10b82ae8 SHA-1: 18c417412d4d45c6ca8e77b6a8ab33ee51aa1249 SHA-256: 28b4909ad9179f90a24dfb42b4480111c16945e5cff7fded485047519b7467dc

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1566.001 Spearphishing Attachment

The sample is an Excel spreadsheet containing a VBA macro, specifically an Auto_Open macro, which is a common technique for executing malicious code upon opening the document. ClamAV detections indicate it is a known malware variant (Ppt.Malware.Laroux-10036124-0 and Xls.Trojan.Escape-1). The document content is formatted as a product change notification, likely a lure to trick the user into enabling macros.

Heuristics 4

ClamAV: Ppt.Malware.Laroux-10036124-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Ppt.Malware.Laroux-10036124-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
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` `fb2929454da53a7c274256eb0b38ca9476f9f1c61d52f3b7e15bf6ac20b85c3e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2073 bytes
Detection ClamAV: Xls.Trojan.Escape-1 Obfuscation or payload: unlikely

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