Office (OLE) / .XLSX malware analysis — malicious · bf9f565e2923bc03

MALICIOUS

Office (OLE) / .XLSX

145.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: ba7a2bdd4ebb66ee0d07143df6c8ef6f SHA-1: 11a5576e75a49f35870c61535bb755fe39673513 SHA-256: bf9f565e2923bc032d3526c3a451ae2f577c0ebb1c2724d764f2094a92ffcb20

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious Excel file containing VBA macros, specifically a Workbook_Open macro that executes code. The script uses `CreateObject` to instantiate `Wscript.Shell` and `Scripting.FileSystemObject`, indicating it intends to run commands and manipulate files. The script attempts to download and execute a payload from multiple URLs, including 'http://reumatismclinic.com/-/scCnm3mbJRpsaKBbrC/' and 'https://shodmanjar.com/wp-admin/xJE mK4Pd3N/', and also creates batch and VBScript files in 'c:\programdata\'. The presence of `Wscript.Shell` and the execution of external files strongly suggest a downloader or initial access mechanism.

Heuristics 7

ClamAV: Doc.Malware.Valyria-10004384-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-10004384-0
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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `527d0656a0c2c323955d068683ef8f7e20c035cda247a1e24383595c0eb3403b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	7821 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

Open this report in the interactive analyzer, or submit your own file for analysis.