Office (OLE) / .XLS malware analysis — malicious · 44139708d5aef6f8

MALICIOUS

Office (OLE) / .XLS

46.0 KB Created: 1998-11-06 09:29:16 Authoring application: Microsoft Excel

MD5: 874c663edcfb20a6f7ac1de3eeb28f5b SHA-1: 55d3874ced7f8974ac0b0c1774d3d6d839dfe292 SHA-256: 44139708d5aef6f873cc125e6902c41c7e4e2c113bd3a585c90c937cc8a74072

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic

The file is an Excel 97 spreadsheet containing VBA macros, specifically an Auto_Open macro, which is a common technique for initial execution. ClamAV signatures indicate it is a known trojan, likely Laroux. No further IOCs were extracted from the document body or embedded artifacts.

Heuristics 4

ClamAV: Xls.Trojan.Laroux-15 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Trojan.Laroux-15
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` `46bbc54e49ab39db8824a0b6b462a4c0fac4e089c93419bf9e2e2daf0807fe47`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	15149 bytes
Detection ClamAV: Xls.Trojan.Laroux-15 Obfuscation or payload: unlikely

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