Office (OLE) / .XLS malware analysis — malicious · 4625d8be23bbcefd

MALICIOUS

Office (OLE) / .XLS

37.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2022-05-27

MD5: 25cd6164a3ce68303844203a43dc22d9 SHA-1: 870bb1d0622c281e38afff28bfddce67991e9e35 SHA-256: 4625d8be23bbcefd3d4c094c006a08b24faca8a704cbcf8992021d2a49ce0aae

120 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1059.003 Windows Command Shell

The sample is an Excel file containing VBA macros. The `macros.bas` script utilizes `ShellExecute` via `GetObject` and a reconstructed shape name to execute a command. The `XUNKv` function constructs a command string that includes 'ping google.com;' followed by text extracted from a shape, suggesting an attempt to execute a command that may involve network interaction or further payload delivery. The `GetObject` call with a value from cell H100 likely retrieves an object to facilitate this execution.

Heuristics 4

Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
GetObject call high OLE_VBA_GETOBJ

GetObject call
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` `367599e7fd87dbb277859c1894d77c76920b08095794d28bd588d2bee94f95f2`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1398 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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