Malicious Office (OOXML) / .DOC — malware analysis report

Static analysis result for SHA-256 e475b7c7a75c53b5…

MALICIOUS

Office (OOXML) / .DOC

73.2 KB Created: 2017-05-11 20:47:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 7b7bb9dc106f9d61b2edd11314d4ff66 SHA-1: 88ac6bc43eef8f596f957e316a629964290b0c82 SHA-256: e475b7c7a75c53b5b325d2de86c69c6c92d8ddd0fee92ee69f8e3028c06e9fd9
382 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample is a malicious OOXML document detected by ClamAV as Doc.Downloader.Donoff-10030369-0. It contains VBA macros, including AutoOpen and Document_Open, which are designed to execute automatically. The script attempts to reconstruct a URL from concatenated strings, specifically 'diejosch.de/77g643', 'volley-bal.be/77g643', '5hdnnd74fffrottd.com/af/77g643', and 'byydei74fg43ff4f.net/af/77g643', likely to download and execute a second-stage payload. The use of CreateObject and CallByName further indicates malicious intent.

Heuristics 10

  • ClamAV: Doc.Downloader.Donoff-10030369-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Donoff-10030369-0
  • 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
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName 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.microsoft.com/office/drawing/2014/chartex
    • 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/2012/wordml
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
e494e0876459ba5296c35f25ae0b859a07c02a1a98cc3a5c5e0b9c3dcc071250		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 12126 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
c8b667219b5b00418d43dde0c662db753d0118aeb2b92e48956466ba6f16965f		 vba-project OOXML VBA project: word/vbaProject.bin 44032 bytes
Detection
ClamAV: Doc.Downloader.Donoff-10030369-0
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.