Office (OLE) / .XLS malware analysis — malicious · d57b64a004412b25

MALICIOUS

Office (OLE) / .XLS

128.0 KB Created: 2025-07-29 01:15:17 Authoring application: Microsoft Excel

MD5: bf9124fcc1e66b7ccf5a2af4fde875b7 SHA-1: 4bc4cc07dc0a50afd07254290a39447e4f254b81 SHA-256: d57b64a004412b25543a340bbbf369c9b7074f0c4bd87655efbd8a0ddea689be

360 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is an Excel file containing VBA macros, including a Workbook_Open event, which is a common technique for auto-executing malicious code upon opening. The heuristics indicate the use of WScript.Shell and the Shell() function, suggesting the script likely attempts to download and execute a second-stage payload. The document body explicitly prompts the user to 'Enable content' to view the document, acting as a lure.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

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

WScript.Shell usage
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
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `01a6436db37874b57bef8919d1ea530c90daad536693dd5036f3489fccabcc7f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	25550 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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