Office (OLE) / .XLSX malware analysis — malicious · d20ae436841e9873

MALICIOUS

Office (OLE) / .XLSX

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

MD5: c8614c6efff558d0d80a9ebb439dbd5c SHA-1: 7762d839115040a239ef81851b7ffb0205ea0b11 SHA-256: d20ae436841e98730bf652adacdc2cacfefd8bee6b377f9164f1549198cd3bb3

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The file contains VBA macros that trigger on workbook open, indicative of malicious intent. The script attempts to create a Windows Script Host object and execute a batch file located at 'c:\programdata\jledshf.bat'. This batch file, in turn, appears to download and execute a VBScript from a URL. The presence of 'CreateObject' and 'Wscript.Shell' heuristics, along with the detected ClamAV signature 'Doc.Malware.Valyria-10004384-0', strongly suggests a downloader or dropper functionality. The reconstructed URL 'http://goyaluaa.vmeshaa.in/0v6kcnky/CG/' is a primary indicator of the second-stage payload source.

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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