Office (OLE) / .XLS malware analysis — malicious · 94cb3a17da22f7a3

MALICIOUS

Office (OLE) / .XLS

66.5 KB Created: 2010-04-06 05:30:36 Authoring application: Microsoft Excel

MD5: e21fc71087c29a5e004e0b1b23e0a488 SHA-1: d9f073f83a693fca2293125c23600ff10425ed27 SHA-256: 94cb3a17da22f7a3431d43ea7f7dcffad6c4e4b9eea6ac1919850a1b3ef370ae

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is an Excel spreadsheet containing VBA macros, specifically an Auto_Open macro, which is a common technique for initial execution. ClamAV detections indicate it is a known malicious variant (Ppt.Malware.Laroux-10036124-0 and Xls.Trojan.Escape-1). The document body presents a plausible business audit checklist to trick the user into enabling macros, which would then likely execute the malicious VBA code to download a second-stage payload.

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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