Office (OLE) / .XLS malware analysis — malicious · 5b8f9c1ae1d716c0

MALICIOUS

Office (OLE) / .XLS

36.5 KB Created: 2005-12-26 02:04:27 Authoring application: Microsoft Excel

MD5: 97bd3add0476ed7a4aed282e00d91822 SHA-1: 6db67077e426289ef1c1a72e5ae841d589ef4053 SHA-256: 5b8f9c1ae1d716c0f58e882640bb1b20a9d4f40c0caecef565ac05e1c1ec6ca2

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The sample is an Excel spreadsheet containing a malicious VBA macro. The `auto_open` macro attempts to copy itself to the Excel startup directory as 'StartUp.xls', establishing persistence. It also manipulates application event handlers to hide its actions and potentially evade detection. The ClamAV detections 'Ppt.Malware.Laroux-10036124-0' and 'Xls.Trojan.Escape-1' further indicate malicious intent.

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` `867f33b96943bbf9af8322b042228c20f1c738891f13586281fda186d6903141`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2056 bytes
Detection ClamAV: Xls.Trojan.Escape-1 Obfuscation or payload: unlikely

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