Office (OLE) / .XLSX malware analysis — malicious · 94de6192bc8ec54d

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 49dae03ab9876924c43108537f17f4e8 SHA-1: cb13d20cb289b37cc91f18a328e1a742a2e53f3d SHA-256: 94de6192bc8ec54d2bcb4122043df0bb01b868b5cafebd74a0e93f33f1c49e25

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1059.005 Visual Basic T1204.002 Malicious File

The Excel document contains VBA macros that execute obfuscated commands. Specifically, it uses `CreateObject("Wscript.Shell")` to run a batch file (`c:\programdata\jledshf.bat`) and a VBScript (`c:\programdata\sduoixo.vbs`). The VBScript further obfuscates URLs, including `http://reumatinibclinic.com/./scCnm3mbJRpsaBKbbrC/`, `https://shodmanjaric.com/wp-admin/xJE4M4Mk3N/`, `http://tubelocal.net/wp-admin/X4Xm4Mk/`, `https://pacifichombroker.com/roderick/RRk/`, and `https://molinai-journal.com/wpa-admin/`, which are likely used to download and execute a second-stage payload. The `Workbook_Open` subroutine is triggered upon opening the document, initiating this malicious chain.

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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