Office (OLE) / .DOC malware analysis — malicious · 8cdb6d99c39a0f5c

MALICIOUS

Office (OLE) / .DOC

100.8 KB Created: 2018-05-29 23:36:00 Authoring application: Microsoft Office Word

MD5: 9115998469d9a95e40f847cfd1b1fab0 SHA-1: 04a4cb9ae163906b974c112fd748463a7ed451df SHA-256: 8cdb6d99c39a0f5cd049623e28838507efb47be81d08d422c14e611a849afd9d

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample contains VBA macros, specifically an AutoOpen macro that utilizes a Shell() call. This indicates the document is designed to execute arbitrary code upon opening. The ClamAV detection 'Doc.Malware.Valyria-6874807-0' further confirms its malicious nature. The primary function appears to be the execution of a second-stage payload, as suggested by the Shell() call within the VBA code.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Doc.Malware.Valyria-6874807-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-6874807-0
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen 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.
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
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` `6225c36ff8ba644de8c7b1d0a38c3db4ea92ee5d7f7aba831b50bf565e45b6e6`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	16929 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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