Office (OLE) / .XLS malware analysis — malicious · fa0e9c96ef83963d

MALICIOUS

Office (OLE) / .XLS

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

MD5: 4c9d3db50cd58ec12305d904d2354f00 SHA-1: b0a4028da497f94c3d00f0c44a60b40fc369d5bc SHA-256: fa0e9c96ef83963d0ab05d58302b13ac57356aed411562c71ef1812066e8ac97

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell 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 suggests that this Excel file is designed to download and execute a secondary payload from the provided URL. The macro's auto-execution capability is a common technique for initial payload delivery.

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/Kqslz.ex

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `97bca467ef79f8b2842fda38c2c38e8b1f36676efb904ffafee2c861b7a7f52e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1155 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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