Office (OLE) / .DOC malware analysis — malicious · 3ca7067d60ee47be

MALICIOUS

Office (OLE) / .DOC

216.0 KB Created: 2021-11-03 07:22:00 Authoring application: Microsoft Office Word First seen: 2022-02-16

MD5: 52f79913a72c1afe1cd6b22445aab3e5 SHA-1: 88cd07d242a82ed9e5c99b40efdd5bf8b60694ed SHA-256: 3ca7067d60ee47be7448da74be7dab23699cda64cac7ed0cd7a2d219875cb902

202 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Service Execution: Service Execution T1059.001 PowerShell: PowerShell T1218 Signed Binary Proxy Execution

The sample contains VBA macros with an AutoOpen function, indicating it is designed to execute automatically upon opening. The script utilizes GetObject to interact with WMI (winmgmts:win32_process) to create a new process, a common technique for executing malicious payloads. The script also attempts to download a second-stage payload from the URL "http://asenal.medianetwork.info/get.php?id=1", which is reconstructed from concatenated strings.

Heuristics 6

VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE

VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
GetObject call high OLE_VBA_GETOBJ

GetObject 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.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `0e1a5b1153d8c775b02af09e230bc63f6389c4a88766e3a0ce19d6f2df928ee7`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2275 bytes

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