Office (OLE) / .XLS malware analysis — malicious · 75bdfe96974a62f7

MALICIOUS

Office (OLE) / .XLS

43.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2022-08-24

MD5: 7681fa9d703eb820a9ac5f23a43f372f SHA-1: 08d4e770e06d36f4f9fc19fc9b46514c24b17e4a SHA-256: 75bdfe96974a62f7d23e62a64a7ffa3419514ea51f440a6844c1bed77d612b35

182 Risk Score

Malware Insights

MITRE ATT&CK

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

The Workbook_Open VBA macro is configured to execute a shell command. This command uses mshta to download and execute a file from the provided URL. The macro's obfuscated nature and the use of mshta indicate a malicious intent to download and run a secondary payload.

Heuristics 6

Reference to mshta.exe high SC_STR_MSHTA

Reference to mshta.exe
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
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.
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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 https://www.mediafire.com/file/kzu1nn3yn1t4cym/15.htm/file

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `aada3f27533835c6b232a991a6d93383d58b28cbc2ff7159eefc057bfe0a189e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1446 bytes

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