Office (OLE) / .XLS malware analysis — malicious · 2310c9985e7434fd

MALICIOUS

Office (OLE) / .XLS

327.5 KB Created: 2020-11-17 01:16:40

MD5: c34b51719e5e3881c8c2af784ae7157f SHA-1: 7187dea0026c7fd7bd162c710d3dff5d8b7c0057 SHA-256: 2310c9985e7434fdac9fab92a88e8f916bb079761a4ae354888533610ef48944

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer T1059.003 Windows Command Shell

The critical OLE_VBA_SHELL and OLE_VBA_DOWNLOAD heuristics indicate that the VBA macros within this XLS file are designed to execute commands and download external content. Specifically, the Workbook_Open macro is triggered upon opening, which is a common technique for initial execution. The presence of URLDownloadToFile strongly suggests the macro's intent is to fetch and run a second-stage payload from a remote source, aligning with typical downloader behavior.

Heuristics 5

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
URLDownloadToFile in VBA critical OLE_VBA_DOWNLOAD

URLDownloadToFile in VBA
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
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` `b95f35d14df86281ca3814ace595e4d84280112a4c7d57376fbbd79538998731`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3407 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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