Office (OOXML) / .DOCX malware analysis — malicious · 9d842c9c269345cd

MALICIOUS

Office (OOXML) / .DOCX

776.3 KB Created: 2018-12-31 02:40:00 UTC Authoring application: Microsoft Office Word 14.0000

MD5: 1a6f9190e7c53cd4e9ca4532547131af SHA-1: 88708e9562a8c4ee4601b3990a664bc63b378753 SHA-256: 9d842c9c269345cd3b2a9ce7d338a03ffbf3765661f1ee6d5e178f40d409c3f8

420 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1218 System Binary Proxy Execution T1059.003 Windows Command Shell

The OOXML document contains VBA macros, including AutoOpen and Document_Open, which are triggered automatically. Critical heuristics indicate the use of Shell() and a LOLBin reference within the VBA code. ClamAV detections confirm this is a dropper, likely executing a second-stage payload. The document body content appears to be unrelated filler text.

Heuristics 10

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
LOLBin reference in VBA critical OLE_VBA_LOLBIN

LOLBin reference in VBA
ClamAV: Doc.Dropper.Agent-6829596-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Agent-6829596-0
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
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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 project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present
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.microsoft.com/office/word/2010/wordprocessingCanvas
- http://schemas.openxmlformats.org/markup-compatibility/2006
- http://schemas.openxmlformats.org/officeDocument/2006/relationships
- http://schemas.openxmlformats.org/officeDocument/2006/math
- http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
- http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
- http://schemas.openxmlformats.org/wordprocessingml/2006/main
- http://schemas.microsoft.com/office/word/2010/wordml
- http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
- http://schemas.microsoft.com/office/word/2010/wordprocessingInk
- http://schemas.microsoft.com/office/word/2006/wordml
- http://schemas.microsoft.com/office/word/2010/wordprocessingShape
- http://schemas.openxmlformats.org/officeDocument/2006/rela

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `6a7a6385a04c20ae20d36c0dcc6ffea0c81de4df06cbb65b83a43bb10ce8f629`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	4000 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `b5cbba1d74f50330f4913ddfb99d3282a8869c07519e3d86d6768c82fe51e6c9`	vba-project	OOXML VBA project: word/vbaProject.bin	26112 bytes
Detection ClamAV: Doc.Dropper.Agent-6829596-0 Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). 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.