Office (OLE) / .XLS malware analysis — malicious · 9223fac178e2ded2

MALICIOUS

Office (OLE) / .XLS

296.0 KB Created: 2020-09-24 21:59:29

MD5: 0ff009e7594e5c6b6c86324ed9f4df43 SHA-1: 94a2fe3e3e660bcd84370f9a75aa669341292add SHA-256: 9223fac178e2ded208ddc0ef55aaa644fdc9c8c5e726ba0979c66e5f28323754

200 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is an XLS file containing VBA macros, including a Workbook_Open macro, which is a common technique for automatic execution. Heuristics indicate VBA Chr string obfuscation and auto-execution, suggesting the macros are designed to download and execute a second-stage payload. The ClamAV detection further confirms its malicious nature.

Heuristics 5

ClamAV: Win.Malware.Agent-9768459-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Malware.Agent-9768459-0
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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` `b38aa9557f92f0de6f0e1ad55e12514334d98201c47c1f288cdcb6e0f153bf6b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6954 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 145 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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