Office (OLE) / .XLSX malware analysis — malicious · d24cd1ed31b13103

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 3c5bfe346e1bf0777e6df02980994475 SHA-1: ad6ecef0c4c23ad3007c988fa2c540cba9929a04 SHA-256: d24cd1ed31b131031af428598b3f85d285005b3eac5ba8b78d5b6c1ca78fed97

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer T1204.002 Malicious File

The Workbook_Open macro executes a PowerShell command that downloads a file named 'MSOutlook.exe' from 'http://192.210.214.174/Office/MSOutlook.exe' and saves it as 'C:\Users\Public\Documents\everybodyincluding.exe'. The macro also attempts to open an explorer window with a path that resolves to 'C:\Users\Public\dssdd.cm'. This indicates a downloader functionality.

Heuristics 5

Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
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.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact medium 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `3ab5587e18cab6736bc7ca2a60bd7bbc9ee673338c8b07830ae95347250f6da4`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1902 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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