Office (OLE) / .DOC malware analysis — malicious · 24381937a49cc3d6

MALICIOUS

Office (OLE) / .DOC

57.5 KB Created: 2017-05-11 08:53:00 Authoring application: Microsoft Office Word

MD5: eb2023c5008a373142d5c3294b2ecccb SHA-1: bab19112d4988b0ea40bcf8b85d50269faf4ddb7 SHA-256: 24381937a49cc3d6d081aba897d8317b4a2d704b3a72d0cc088c29b243304e0a

282 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious OLE document containing VBA macros. The 'autoopen' macro triggers the execution of the 'f_new' subroutine, which in turn calls 'f_new2'. The 'f_new2' function appears to be obfuscated but ultimately reconstructs a string and potentially executes it using the Shell() function. The presence of 'Shell() call in VBA' and 'VBA p-code auto-exec with execution tokens' heuristics, along with the 'Doc.Dropper.Agent-6311576-0' ClamAV detection, strongly indicates a dropper functionality. The script attempts to construct a path starting with 'c:\users\'.

Heuristics 8

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Doc.Dropper.Agent-6311576-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Agent-6311576-0
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
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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` `75a385dd88434c598c301ed90097fd100ae04f772cdf45cc66ddd6431e404752`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1899 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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