Office (OLE) / .DOC malware analysis — malicious · 235c261721226fe5

MALICIOUS

Office (OLE) / .DOC

243.5 KB Created: 2019-05-10 08:11:00 First seen: 2022-04-20

MD5: 57af9c5bec23ca9d526ebafbe82a86ac SHA-1: 558ce6bc8838c1ca5301224a45df3db22994cda5 SHA-256: 235c261721226fe500ca649643051fb515d2925adf37b5c706a917dc4d3dbb76

450 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains VBA macros, including a Document_Open macro that utilizes Shell() and CreateObject() calls, indicative of malicious intent. The script appears to be heavily obfuscated, but the presence of these functions suggests it's designed to download and execute a second-stage payload. The ClamAV detection further supports its malicious nature.

Heuristics 12

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
ClamAV: Doc.Malware.Valyria-10010063-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-10010063-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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.
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` `07da61a2b8119583d0868569b1e90affde2ab501281e019a62cf605693fec649`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	112506 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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