Office (OLE) / .XLS malware analysis — malicious · 0460eaab50a96b40

MALICIOUS

Office (OLE) / .XLS

39.0 KB Created: 2021-09-14 00:30:51 Authoring application: Microsoft Excel

MD5: b003e33c743da4d4f69184e9db2c4862 SHA-1: bb6b3cc70a7e0463bc2914e478ffa40bba1cdf69 SHA-256: 0460eaab50a96b4024770dc1a1e052132e7391007c2707a8f38eb255bbf643ac

362 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File: User Execution

This XLS file contains a Workbook_Open macro that executes obfuscated VBA code. The script utilizes WScript.Shell to run commands, indicating a likely attempt to download and execute a second-stage payload. The presence of obfuscated auto-exec loaders and shell calls points to a malicious intent.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER

Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
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.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact info 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` `ba1a4a64e56b6f817b6a960b77a8a9df25d39f89381f09bdc810010d3d1d5067`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6132 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 long base64-like blob(s).

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