Office (OLE) / .XLSX malware analysis — malicious · 1a439e9be3a8f33f

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 9700ad556bb162b1f5191f9c267fe853 SHA-1: 485fd981db79c0595f269c2e4681bff39fbab3e7 SHA-256: 1a439e9be3a8f33f627d5814ec4c35e03db7a51633ca9003c75c16d53102a317

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample contains a Workbook_Open macro that leverages Wscript.Shell and CreateObject to execute a batch file and a VBScript from the C:\ProgramData directory. The VBScript appears to be a downloader, attempting to fetch payloads from multiple hardcoded URLs. The reconstructed URL is "http://reumatiisminic.com/./scCnm3mbJRpsaBKbRCr/,https://shodmanjaric.com/wp-admin/xJE4M4Pd3N/,http://tubelocal.net/wp-admin/X4Xm4Mqk/,https://pacifichomebroker.com/roderick/RRk/,https://molinai-journal.com/rodericK/RRk/". This indicates a clear intent to download and execute a second-stage payload.

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.

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