Office (OLE) / .DOCX malware analysis — malicious · 4c87b799ce58a6f8

MALICIOUS

Office (OLE) / .DOCX

47.5 KB Created: 1998-08-29 00:07:00 Authoring application: Microsoft Word 8.0

MD5: 2179a1654863a0cf6baa66ae6b31b67f SHA-1: be79e91af692e740b89f771d895040175eb29d74 SHA-256: 4c87b799ce58a6f89cdac7abbfd0c29178580f02501560448dce339ebb7a575b

420 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample contains VBA macros with AutoOpen and AutoExec functions, indicating an attempt to automatically execute malicious code upon opening. The script attempts to disable macro virus protection and exports itself to 'c:\shiver.sys' and 'c:\sentry.sys', suggesting it's preparing to download and execute a second-stage payload. The presence of 'Shell()' calls and the 'SE_ENABLE_LURE' heuristic further support this malicious intent. The ClamAV detections 'Doc.Trojan.Shiver-2' and 'Doc.Trojan.Shiver-1' also point to a known malicious document family.

Heuristics 10

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Doc.Trojan.Shiver-2 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Shiver-2
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `c178a234db9eb416b7f9a1570ef9c38a1c78c5c323cab43ed9f48526efe68917`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	40210 bytes
Detection ClamAV: Doc.Trojan.Shiver-1 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

Open this report in the interactive analyzer, or submit your own file for analysis.