Powload Office (OLE) / .DOC malware analysis — malicious · a31b9ebd3c79ea7d

MALICIOUS

Office (OLE) / .DOC

156.1 KB Created: 2019-05-02 17:42:00 Authoring application: Microsoft Office Word

MD5: c905de749c0eb72e5c70ab496a7740ee SHA-1: 49a9b3f6bdc1b97e2e30e41eec18b0b799be29ad SHA-256: a31b9ebd3c79ea7d6240df25a22b699a77128eb315c332af18fdba229e784926

260 Risk Score

Malware Insights

Powload · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1218.011 System Binary Proxy Execution: Rundll32

The file contains VBA macros, specifically an AutoOpen macro, which is designed to execute automatically. The critical heuristic 'OLE_VBA_WMI_PROCESS_CREATE' indicates that the macro attempts to launch a process using WMI's Win32_Process.Create method. This is a common technique for malware to execute arbitrary code or download further stages. The ClamAV detection name 'Doc.Malware.Powload-6960282-0' strongly suggests the 'Powload' family, which is known for using macro-based execution. The embedded URL is benign and likely part of the document's legitimate structure.

Heuristics 7

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.
ClamAV: Doc.Malware.Powload-6960282-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Powload-6960282-0
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` `6eb678ca13808c0ceb6f1439572fedaa5d97af9fd9b328f46f23b116b69e2943`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8156 bytes

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