Office (OLE) / .XLS malware analysis — malicious · db66b26d04c77e03

MALICIOUS

Office (OLE) / .XLS

342.5 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel

MD5: f264b8c58febaa3f3eea9a8c83c78cbf SHA-1: 36010881f4c3e15878bb3d5e76bc443d82827ebe SHA-256: db66b26d04c77e03bbf22957af34ba2b5817c397036ab8d4b7c222ec1b1ff40e

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The presence of a Workbook_Open VBA macro, combined with a CreateObject call and a reference to Windows Script Host, strongly indicates that this Excel file is designed to execute a malicious payload. The macro likely downloads and executes the file from the provided URL. The specific family is not identifiable from the available heuristics.

Heuristics 7

Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
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
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://178.17.171.144/sch/Scafu.ex

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `66abf715339401df2f5a323dc643908eeee67ede187ff9c1ea182d18a6a41e33`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1131 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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