Office (OLE) / .XLSX malware analysis — malicious · ea8978fc019763b5

MALICIOUS

Office (OLE) / .XLSX

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

MD5: a0dae91ed26571994e3685638a3dad34 SHA-1: 5f857a964445938f7a245b5bb2f4f99f2f13714d SHA-256: ea8978fc019763b54fa3f0e4b1584884b44ed56b21ba710c0b792b1bc93e682b

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The Workbook_Open VBA macro is configured to execute commands via Windows Script Host. It constructs a command line that includes a base64 encoded string, which likely decodes to a list of URLs. The script also attempts to create and execute a batch file located at 'c:\programdata\jledshf.bat' and a VBScript at 'c:\programdata\sduoixo.vbs', indicating a downloader or dropper functionality. The presence of 'CreateObject' and references to 'wscript.shell' further support this. The reconstructed command line is 'hell -e Has4htksdighfdGJSXDghs4tshdkrg zasg3ksjfHXGHJXdfezse34 Fghsdregsh3ksjdfhkgz'. The encoded string decodes to: 'http://reumatismclinic.com/./scCn3mbiJRpwBsKBbrC/,https://shodmanjaric.com/wp-admin/xEmK4Pd3N/,http://tubelocal.net/wp-admin/X4Xm4Mk/,https://pacifichombroker.com/roderick/RRk/,https://molinai-journal.com/rodeirick/RRk/'.

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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