Office (OLE) / .DOC malware analysis — malicious · b398c602a2c9bab7

MALICIOUS

Office (OLE) / .DOC

76.0 KB Created: 2017-10-16 23:08:00 Authoring application: Microsoft Office Word

MD5: 7b2bc2d27c4606687afe2ae939bc1a4d SHA-1: f04b362244ef95752bdc38c5ca6d09133b5dc341 SHA-256: b398c602a2c9bab7ad128bcd189f83106244670cdf6b99782e59ed9d5435cef6

328 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1566.001 Spearphishing Attachment

The file is a malicious OLE document containing VBA macros. The 'Document_Open' macro is automatically executed upon opening, and it uses a Shell() call to execute arbitrary code. The document body displays a lure instructing the user to 'Enable Content', which is a common social engineering tactic to bypass macro security. The presence of a Shell() call and the auto-execution of macros strongly indicate a downloader or dropper functionality.

Heuristics 10

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Xls.Macro.Obfuscation-9804250-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Macro.Obfuscation-9804250-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject 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
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
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` `980dd79ddcc5f644f6685e0f25a91631047c0f8e6f0da12f3d759438b722c888`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	16757 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 66 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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