Office (OLE) / .DOC malware analysis — malicious · 457882b13d9e0825

MALICIOUS

Office (OLE) / .DOC

26.0 KB Created: 2020-12-11 23:42:00 Authoring application: Microsoft Word 9.0

MD5: 1342bab9a9884f3ee8e3f068a8b556ad SHA-1: c2745f1661370c92bc049198533ab0f812d01b07 SHA-256: 457882b13d9e0825bd33d4c337445566a22b8f43f32addc73d4b39e77997d873

360 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious OLE document containing obfuscated VBA macros. Critical heuristics indicate the use of Shell() calls and an embedded URL, suggesting the macros are designed to download and execute a second-stage payload. The ClamAV detection as 'Doc.Dropper.Agent-6412232-1' further supports this dropper functionality. The presence of a benign-likely URL in the extracted data is noted but does not detract from the malicious nature indicated by the heuristics and detection.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL

VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
ClamAV: Doc.Dropper.Agent-6412232-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Agent-6412232-1
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
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://the.earth.li/~sgtatham/putty/0.63/x86/pscp.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `2a10979e065748d91ff583c8c3d479d99407f2328e0e53695f47844c29366831`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1638 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 22 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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