Office (OLE) / .DOC malware analysis — malicious · fccad2fea7371ad2

MALICIOUS

Office (OLE) / .DOC

874.4 KB Created: 2021-07-28 00:35:00 Authoring application: Microsoft Office Word

MD5: ce866ae254de4cabd60a95abcc52c315 SHA-1: 224fe06d61d2dc8d273a41d6dd83c9ce378719b9 SHA-256: fccad2fea7371ad24a1256b78165bceffc5d01a850f6e2ff576a2d8801ef94fa

322 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File

The VBA macro 'Document_Open' is triggered upon opening the document. It constructs and executes a command line that uses 'cmd.exe' to find a string 'var' within the document itself, writes it to a file named 'y.js', and then executes 'y.js' using 'wscript.exe'. This indicates the document is designed to download and execute a second-stage payload via a JavaScript file. The use of cmd.exe and wscript.exe are directly observed in the script.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Reference to PowerShell high SC_STR_POWERSHELL

Reference to PowerShell
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
cmd.exe reference in VBA high OLE_VBA_CMD

cmd.exe reference in VBA
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` `76c6c4b74e5e222259b11052f8fc1d6a74eb7e042e0affc23008e08ccbce5ec8`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	576 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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