File name:

OZra.dll

Full analysis: https://app.any.run/tasks/7325e5b3-b755-46a3-a56e-7529dd11c08f
Verdict: Malicious activity
Analysis date: January 14, 2022, 20:03:57
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (DLL) (GUI) Intel 80386, for MS Windows
MD5:

02F53C085FB91533E4353E7A99FF8D57

SHA1:

D6325CB54C0F234D8CBD6573C5655E812CE22870

SHA256:

04B4A8EE23F3B9FA941C2CA67D4A3358BAB9DD2FF608E15A05AB49F77473BBAA

SSDEEP:

6144:o1ju3jPam65ucnNgDoDUhuGGwKveuD4VKYjHyCAJOhrmBlDxqms9ujAJKedmL/M:yMjcuDaUImhStJorohvsMjmKeD

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.

  • MALICIOUS

    • Loads dropped or rewritten executable

      • rundll32.exe (PID: 3492)
      • rundll32.exe (PID: 3608)
      • rundll32.exe (PID: 2768)

    • Connects to CnC server

      • rundll32.exe (PID: 3492)

    • Changes the autorun value in the registry

      • rundll32.exe (PID: 3492)

  • SUSPICIOUS

    • Uses RUNDLL32.EXE to load library

      • rundll32.exe (PID: 2372)
      • rundll32.exe (PID: 2768)
      • rundll32.exe (PID: 3608)

    • Executable content was dropped or overwritten

      • rundll32.exe (PID: 3608)

    • Drops a file with a compile date too recent

      • rundll32.exe (PID: 3608)

    • Application launched itself

      • rundll32.exe (PID: 3608)
      • rundll32.exe (PID: 2768)
      • rundll32.exe (PID: 2372)

  • INFO

    • Checks supported languages

      • rundll32.exe (PID: 2372)
      • rundll32.exe (PID: 3608)
      • rundll32.exe (PID: 2768)
      • rundll32.exe (PID: 3492)

    • Loads main object executable

      • rundll32.exe (PID: 2372)

    • Reads the computer name

      • rundll32.exe (PID: 3608)
      • rundll32.exe (PID: 3492)

    • Checks Windows Trust Settings

      • rundll32.exe (PID: 3492)

    • Reads settings of System Certificates

      • rundll32.exe (PID: 3492)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | Win32 EXE PECompact compressed (generic) (35.9)
.exe | Win32 Executable MS Visual C++ (generic) (27)
.exe | Win64 Executable (generic) (23.9)
.dll | Win32 Dynamic Link Library (generic) (5.6)
.exe | Win32 Executable (generic) (3.9)

EXIF

EXE

ProductVersion: 1, 0, 0, 1
ProductName: UDPTool 应用程序
OriginalFileName: UDPTool.EXE
LegalTrademarks: -
LegalCopyright: 版权所有 (C) 2014
InternalName: UDPTool
FileVersion: 1, 0, 0, 1
FileDescription: UDPTool Microsoft 基础类应用程序
CompanyName: -
CharacterSet: Unicode
LanguageCode: Chinese (Simplified)
FileSubtype: -
ObjectFileType: Executable application
FileOS: Win32
FileFlags: (none)
FileFlagsMask: 0x003f
ProductVersionNumber: 1.0.0.1
FileVersionNumber: 1.0.0.1
Subsystem: Windows GUI
SubsystemVersion: 4
ImageVersion: -
OSVersion: 4
EntryPoint: 0x17b85
UninitializedDataSize: -
InitializedDataSize: 249856
CodeSize: 163840
LinkerVersion: 8
PEType: PE32
TimeStamp: 2022:01:13 14:38:51+01:00
MachineType: Intel 386 or later, and compatibles

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 13-Jan-2022 13:38:51
Detected languages:
  • Chinese - PRC
  • English - United States
CompanyName: -
FileDescription: UDPTool Microsoft 基础类应用程序
FileVersion: 1, 0, 0, 1
InternalName: UDPTool
LegalCopyright: 版权所有 (C) 2014
LegalTrademarks: -
OriginalFilename: UDPTool.EXE
ProductName: UDPTool 应用程序
ProductVersion: 1, 0, 0, 1

DOS Header

Magic number: MZ
Bytes on last page of file: 0x0090
Pages in file: 0x0003
Relocations: 0x0000
Size of header: 0x0004
Min extra paragraphs: 0x0000
Max extra paragraphs: 0xFFFF
Initial SS value: 0x0000
Initial SP value: 0x00B8
Checksum: 0x0000
Initial IP value: 0x0000
Initial CS value: 0x0000
Overlay number: 0x0000
OEM identifier: 0x0000
OEM information: 0x0000
Address of NE header: 0x000000F0

PE Headers

Signature: PE
Machine: IMAGE_FILE_MACHINE_I386
Number of sections: 5
Time date stamp: 13-Jan-2022 13:38:51
Pointer to Symbol Table: 0x00000000
Number of symbols: 0
Size of Optional Header: 0x00E0
Characteristics:
  • IMAGE_FILE_32BIT_MACHINE
  • IMAGE_FILE_DLL
  • IMAGE_FILE_EXECUTABLE_IMAGE

Sections

Name
Virtual Address
Virtual Size
Raw Size
Charateristics
Entropy
.text
0x00001000
0x00027F5E
0x00028000
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
6.66252
.rdata
0x00029000
0x00008410
0x00009000
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
4.83028
.data
0x00032000
0x0002A9A0
0x00027000
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
7.93281
.rsrc
0x0005D000
0x00003664
0x00004000
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
4.49622
.reloc
0x00061000
0x00008284
0x00009000
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
3.82082

Resources

Title
Entropy
Size
Codepage
Language
Type
1
3.57949
736
Latin 1 / Western European
Chinese - PRC
RT_VERSION
2
4.65542
86
Latin 1 / Western European
English - United States
RT_MANIFEST
3
3.02695
308
Latin 1 / Western European
Chinese - PRC
RT_CURSOR
4
2.74274
180
Latin 1 / Western European
Chinese - PRC
RT_CURSOR
5
2.34038
308
Latin 1 / Western European
Chinese - PRC
RT_CURSOR
6
2.34004
308
Latin 1 / Western European
Chinese - PRC
RT_CURSOR
7
2.51649
308
Latin 1 / Western European
Chinese - PRC
RT_CURSOR
8
2.45401
308
Latin 1 / Western European
Chinese - PRC
RT_CURSOR
9
2.34864
308
Latin 1 / Western European
Chinese - PRC
RT_CURSOR
10
2.34505
308
Latin 1 / Western European
Chinese - PRC
RT_CURSOR

Imports

ADVAPI32.dll
GDI32.dll
KERNEL32.dll
OLEACC.dll (delay-loaded)
OLEAUT32.dll
SHLWAPI.dll
USER32.dll
WINSPOOL.DRV
WS2_32.dll

Exports

Title
Ordinal
Address
DllRegisterServer
1
0x00008AF0
No data.
screenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
37
Monitored processes
4
Malicious processes
2
Suspicious processes
1

Behavior graph

Click at the process to see the details
start rundll32.exe no specs rundll32.exe rundll32.exe no specs rundll32.exe

Process information

PID
CMD
Path
Indicators
Parent process
2372"C:\Windows\System32\rundll32.exe" "C:\Users\admin\AppData\Local\Temp\OZra.dll.exe", DllRegisterServerC:\Windows\System32\rundll32.exe—Explorer.EXE
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows host process (Rundll32)
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\rundll32.exe
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\ntdll.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\user32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\usp10.dll
c:\windows\system32\imagehlp.dll
2768C:\Windows\system32\rundll32.exe "C:\Users\admin\AppData\Local\Bxhrbcogtqanqyq\xmyimsuzcfbt.rfc",TyXPwIXpJC:\Windows\system32\rundll32.exe—rundll32.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows host process (Rundll32)
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\rundll32.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\imagehlp.dll
3492C:\Windows\system32\rundll32.exe "C:\Users\admin\AppData\Local\Bxhrbcogtqanqyq\xmyimsuzcfbt.rfc",DllRegisterServerC:\Windows\system32\rundll32.exe
rundll32.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows host process (Rundll32)
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\rundll32.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\usp10.dll
c:\windows\system32\imagehlp.dll
3608C:\Windows\system32\rundll32.exe "C:\Users\admin\AppData\Local\Temp\OZra.dll.exe",DllRegisterServerC:\Windows\system32\rundll32.exe
rundll32.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows host process (Rundll32)
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\rundll32.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\user32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\imagehlp.dll
Total events
5 677
Read events
5 645
Write events
32
Delete events
0

Modification events

(PID) Process:(3492) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
Operation:writeName:ProxyEnable
Value:
0
(PID) Process:(3492) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections
Operation:writeName:SavedLegacySettings
Value:
460000003B010000090000000000000000000000000000000400000000000000C0E333BBEAB1D3010000000000000000000000000100000002000000C0A80164000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
(PID) Process:(3492) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:ProxyBypass
Value:
1
(PID) Process:(3492) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:IntranetName
Value:
1
(PID) Process:(3492) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:UNCAsIntranet
Value:
1
(PID) Process:(3492) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:AutoDetect
Value:
0
(PID) Process:(3492) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{362E934C-743B-4588-8259-D2482DB771A8}
Operation:writeName:WpadDecisionReason
Value:
1
(PID) Process:(3492) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{362E934C-743B-4588-8259-D2482DB771A8}
Operation:writeName:WpadDecisionTime
Value:
4E2CB6F18109D801
(PID) Process:(3492) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{362E934C-743B-4588-8259-D2482DB771A8}
Operation:writeName:WpadDecision
Value:
0
(PID) Process:(3492) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{362E934C-743B-4588-8259-D2482DB771A8}
Operation:writeName:WpadNetworkName
Value:
Network 4
Executable files
1
Suspicious files
5
Text files
0
Unknown types
1

Dropped files

PID
Process
Filename
Type
3492rundll32.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\77EC63BDA74BD0D0E0426DC8F8008506binary
MD5:—
SHA256:—
3492rundll32.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157binary
MD5:—
SHA256:—
3608rundll32.exeC:\Users\admin\AppData\Local\Bxhrbcogtqanqyq\xmyimsuzcfbt.rfcexecutable
MD5:—
SHA256:—
3492rundll32.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\77EC63BDA74BD0D0E0426DC8F8008506compressed
MD5:ACAEDA60C79C6BCAC925EEB3653F45E0
SHA256:6B0CECCF0103AFD89844761417C1D23ACC41F8AEBF3B7230765209B61EEE5658
3492rundll32.exeC:\Users\admin\AppData\Local\Temp\Tar2F1E.tmpcat
MD5:D99661D0893A52A0700B8AE68457351A
SHA256:BDD5111162A6FA25682E18FA74E37E676D49CAFCB5B7207E98E5256D1EF0D003
3492rundll32.exeC:\Users\admin\AppData\Local\Temp\Cab2F1D.tmpcompressed
MD5:ACAEDA60C79C6BCAC925EEB3653F45E0
SHA256:6B0CECCF0103AFD89844761417C1D23ACC41F8AEBF3B7230765209B61EEE5658
3492rundll32.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157compressed
MD5:F7DCB24540769805E5BB30D193944DCE
SHA256:6B88C6AC55BBD6FEA0EBE5A760D1AD2CFCE251C59D0151A1400701CB927E36EA
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
2
TCP/UDP connections
5
DNS requests
1
Threats
4

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
3492
rundll32.exe
GET
200
178.79.242.0:80
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab?48485ec872a734f3
DE
compressed
59.9 Kb
whitelisted
3492
rundll32.exe
GET
200
178.79.242.0:80
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?4ecc512942d22c12
DE
compressed
4.70 Kb
whitelisted
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
3492
rundll32.exe
45.138.98.34:80
—
—
—
malicious
3492
rundll32.exe
69.16.218.101:8080
—
Liquid Web, L.L.C
US
malicious
3492
rundll32.exe
178.79.242.0:80
ctldl.windowsupdate.com
Limelight Networks, Inc.
DE
whitelisted

DNS requests

Domain
IP
Reputation
ctldl.windowsupdate.com
  • 178.79.242.0
  • 95.140.236.128
whitelisted

Threats

PID
Process
Class
Message
3492
rundll32.exe
A Network Trojan was detected
ET CNC Feodo Tracker Reported CnC Server group 17
3492
rundll32.exe
A Network Trojan was detected
ET CNC Feodo Tracker Reported CnC Server group 20
2 ETPRO signatures available at the full report
No debug info
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ANY.RUN
Reports
OZra.dll