Office (OLE) / .DOC malware analysis — malicious · 8dd29c0676339a70

MALICIOUS

Office (OLE) / .DOC

81.5 KB Created: 1999-05-12 08:25:00 Authoring application: Microsoft Word 8.0

MD5: 230f206b90ec35c5f3271590a1e9cd88 SHA-1: 4cfcdbf3a3012c96aee73291910e4617ffa0e61b SHA-256: 8dd29c0676339a7097e8f641da87d02697c72a102ccec5f80d42b60171bd0e48

248 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains a VBA macro that is automatically executed upon opening the document, as indicated by the 'Document_Open' macro and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic. The 'OLE_VBA_SHELL' heuristic firing suggests that this macro likely uses the Shell() function to execute a command. This command is probably intended to download and execute a second-stage payload, a common technique for initial access and further system compromise. The document body text appears to be related to an office interface and macro extraction, which is likely a lure.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Reference to LoadLibrary API high SC_STR_LOADLIBRARY

Reference to LoadLibrary API
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open 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
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `6e16267413013ac03a6a0ad3257128d45a83519b6d8d31ec7e738006742c78ec`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	72947 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 14 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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