Office (OLE) / .DOC malware analysis — malicious · 99ead91569faadd3

MALICIOUS

Office (OLE) / .DOC

109.0 KB Created: 2020-05-17 00:58:00 Authoring application: Microsoft Office Word

MD5: 5c716d464d884f900e60138b370818b9 SHA-1: 0c8e6798e0a0435e6517fd99422f899acc74635d SHA-256: 99ead91569faadd36b160701b48e268d1a3e364d8aa64248121eed2ad282e327

248 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer T1218.011 System Binary Proxy Execution: Rundll32

The sample is a malicious OLE document containing VBA macros. Heuristics indicate the use of `certutil` for downloading and decoding, and `CreateObject` for execution. The VBA macros likely download and execute a second-stage payload, as suggested by the `certutil` and `Rundll32` references. The document body contains suspicious strings like `winmgmts:Win32_Process` and `Rundll32`, further supporting the execution of malicious code.

Heuristics 8

ClamAV: Ole2.Macro.Agent-9858864-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Ole2.Macro.Agent-9858864-1
Heap-spray pattern detected high SC_HEAP_SPRAY

Repeated 0x41 (A) bytes found
Reference to certutil (download/decode) high SC_STR_CERTUTIL

Reference to certutil (download/decode)
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)
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` `4d9513786a4d90c8cd9b769b0bb434db801c484d0b926b9fc020e284ab35dcbe`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1404 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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