Office (OLE) / .XLS malware analysis — malicious · 9a0a90027d20cb15

MALICIOUS

Office (OLE) / .XLS

139.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2021-10-23

MD5: 4e18e09ebe9904bcc1665a03ccf7289c SHA-1: 682123a35c4ab059373eff365ad65302e00d5436 SHA-256: 9a0a90027d20cb15d3be76724f39f8b99e68837a2e0f8a781de7b3ae2895611a

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications

The file is an Excel spreadsheet containing VBA macros, including an Auto_Open macro, which is a common technique for initial execution. The ClamAV detection 'Doc.Downloader.Docusign112100-9908075-0' suggests a downloader functionality. While the provided VBA code primarily manipulates spreadsheet elements and shape visibility, the presence of Auto_Open and the downloader signature indicate a malicious intent, likely to fetch and execute a secondary payload. The script is truncated, preventing a full analysis of its execution flow.

Heuristics 5

ClamAV: Doc.Downloader.Docusign112100-9908075-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Docusign112100-9908075-0
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close macro
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact medium 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `f4e48281b213290d1746a751faaf23e6f325824bbdf08ac884120321e035c7eb`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5180 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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