File name:

C:\Users\admin\Desktop\OsuBuddy!.exe

Full analysis: https://app.any.run/tasks/526aa18c-e7cf-46a9-b300-2ba79de95478
Verdict: Malicious activity
Threats:

AsyncRAT is a RAT that can monitor and remotely control infected systems. This malware was introduced on Github as a legitimate open-source remote administration software, but hackers use it for its many powerful malicious functions.

Analysis date: June 21, 2021, 23:22:39
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:
trojan
rat
asyncrat
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
MD5:

4E6876C231D290666E86211B806D11B1

SHA1:

73D0DBF89CA959A843FA8A348516823E0375938C

SHA256:

201F505B4370813EC2D770778CACB0201F4E9338453E366F4262A9C8DD28CB31

SSDEEP:

6144:k0fwhgvClUqYQO8CwZo6wh9zwFLt5esSuR8UR7WPNhBlJ7wv:chgAd5Gbb8quR8UR7WfNEv

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

    • Uses Task Scheduler to run other applications

      • OsuBuddy!.exe (PID: 1500)
    • ASYNCRAT was detected

      • MSBuild.exe (PID: 2916)
    • Executes PowerShell scripts

      • cmd.exe (PID: 3716)
    • Loads the Task Scheduler COM API

      • schtasks.exe (PID: 2452)
  • SUSPICIOUS

    • Creates files in the user directory

      • OsuBuddy!.exe (PID: 1500)
      • powershell.exe (PID: 3496)
    • Executable content was dropped or overwritten

      • MSBuild.exe (PID: 2916)
      • OsuBuddy!.exe (PID: 1500)
    • Starts CMD.EXE for commands execution

      • MSBuild.exe (PID: 2916)
    • Drops a file with a compile date too recent

      • OsuBuddy!.exe (PID: 1500)
  • INFO

    No info indicators.
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | Generic CIL Executable (.NET, Mono, etc.) (56.7)
.exe | Win64 Executable (generic) (21.3)
.scr | Windows screen saver (10.1)
.dll | Win32 Dynamic Link Library (generic) (5)
.exe | Win32 Executable (generic) (3.4)

EXIF

EXE

AssemblyVersion: 1.0.0.0
ProductVersion: 1.0.0.0
ProductName: TDD Katas
OriginalFileName: U6tb.exe
LegalTrademarks: -
LegalCopyright: Copyright © 2011 - 2021
InternalName: U6tb.exe
FileVersion: 1.0.0.0
FileDescription: TDD Katas
CompanyName: -
Comments: -
CharacterSet: Unicode
LanguageCode: Neutral
FileSubtype: -
ObjectFileType: Executable application
FileOS: Win32
FileFlags: (none)
FileFlagsMask: 0x003f
ProductVersionNumber: 1.0.0.0
FileVersionNumber: 1.0.0.0
Subsystem: Windows GUI
SubsystemVersion: 4
ImageVersion: -
OSVersion: 4
EntryPoint: 0x5b28e
UninitializedDataSize: -
InitializedDataSize: 2048
CodeSize: 365568
LinkerVersion: 48
PEType: PE32
TimeStamp: 2021:06:21 22:27:13+02:00
MachineType: Intel 386 or later, and compatibles

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 21-Jun-2021 20:27:13
Comments: -
CompanyName: -
FileDescription: TDD Katas
FileVersion: 1.0.0.0
InternalName: U6tb.exe
LegalCopyright: Copyright © 2011 - 2021
LegalTrademarks: -
OriginalFilename: U6tb.exe
ProductName: TDD Katas
ProductVersion: 1.0.0.0
Assembly Version: 1.0.0.0

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: 0x00000080

PE Headers

Signature: PE
Machine: IMAGE_FILE_MACHINE_I386
Number of sections: 3
Time date stamp: 21-Jun-2021 20:27:13
Pointer to Symbol Table: 0x00000000
Number of symbols: 0
Size of Optional Header: 0x00E0
Characteristics:
  • IMAGE_FILE_32BIT_MACHINE
  • IMAGE_FILE_EXECUTABLE_IMAGE

Sections

Name
Virtual Address
Virtual Size
Raw Size
Charateristics
Entropy
.text
0x00002000
0x000592B4
0x00059400
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
7.66279
.rsrc
0x0005C000
0x000005AC
0x00000600
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
4.09388
.reloc
0x0005E000
0x0000000C
0x00000200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
0.10191

Resources

Title
Entropy
Size
Codepage
Language
Type
1
5.00112
490
UNKNOWN
UNKNOWN
RT_MANIFEST

Imports

mscoree.dll
No data.
screenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
42
Monitored processes
5
Malicious processes
2
Suspicious processes
1

Behavior graph

Click at the process to see the details
start osubuddy!.exe schtasks.exe no specs #ASYNCRAT msbuild.exe cmd.exe no specs powershell.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
1500"C:\Users\admin\AppData\Local\Temp\OsuBuddy!.exe" C:\Users\admin\AppData\Local\Temp\OsuBuddy!.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
TDD Katas
Exit code:
0
Version:
1.0.0.0
Modules
Images
c:\users\admin\appdata\local\temp\osubuddy!.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\mscoree.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\microsoft.net\framework\v4.0.30319\mscoreei.dll
2452"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\goyPJxbCS" /XML "C:\Users\admin\AppData\Local\Temp\tmp4D0D.tmp"C:\Windows\System32\schtasks.exeOsuBuddy!.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Manages scheduled tasks
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\schtasks.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\ole32.dll
2916"{path}"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
OsuBuddy!.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
MSBuild.exe
Exit code:
0
Version:
4.7.3062.0 built by: NET472REL1
Modules
Images
c:\windows\microsoft.net\framework\v4.0.30319\msbuild.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\mscoree.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\microsoft.net\framework\v4.0.30319\mscoreei.dll
3496powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\admin\AppData\Local\Temp\miuftg.exe"' C:\Windows\System32\WindowsPowerShell\v1.0\powershell.execmd.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows PowerShell
Exit code:
1
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\windowspowershell\v1.0\powershell.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\atl.dll
c:\windows\system32\user32.dll
3716"C:\Windows\System32\cmd.exe" /c start /b powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\admin\AppData\Local\Temp\miuftg.exe"' & exitC:\Windows\System32\cmd.exeMSBuild.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Command Processor
Exit code:
0
Version:
6.1.7601.17514 (win7sp1_rtm.101119-1850)
Modules
Images
c:\windows\system32\cmd.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\winbrand.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
Total events
709
Read events
632
Write events
77
Delete events
0

Modification events

(PID) Process:(1500) OsuBuddy!.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:UNCAsIntranet
Value:
0
(PID) Process:(1500) OsuBuddy!.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:AutoDetect
Value:
1
(PID) Process:(2916) MSBuild.exeKey:HKEY_CLASSES_ROOT\Local Settings\MuiCache\13D\52C64B7E
Operation:writeName:LanguageList
Value:
en-US
(PID) Process:(2916) MSBuild.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:UNCAsIntranet
Value:
0
(PID) Process:(2916) MSBuild.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:AutoDetect
Value:
1
(PID) Process:(3496) powershell.exeKey:HKEY_CLASSES_ROOT\Local Settings\MuiCache\13D\52C64B7E
Operation:writeName:LanguageList
Value:
en-US
(PID) Process:(3496) powershell.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:UNCAsIntranet
Value:
0
(PID) Process:(3496) powershell.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:AutoDetect
Value:
1
Executable files
2
Suspicious files
7
Text files
0
Unknown types
0

Dropped files

PID
Process
Filename
Type
1500OsuBuddy!.exeC:\Users\admin\AppData\Local\Temp\tmp4D0D.tmp
MD5:
SHA256:
2916MSBuild.exeC:\Users\admin\AppData\Local\Temp\Cab6548.tmp
MD5:
SHA256:
2916MSBuild.exeC:\Users\admin\AppData\Local\Temp\Tar6549.tmp
MD5:
SHA256:
2916MSBuild.exeC:\Users\admin\AppData\Local\Temp\Cab655A.tmp
MD5:
SHA256:
2916MSBuild.exeC:\Users\admin\AppData\Local\Temp\Tar655B.tmp
MD5:
SHA256:
2916MSBuild.exeC:\Users\admin\AppData\Local\Temp\Cab65E9.tmp
MD5:
SHA256:
2916MSBuild.exeC:\Users\admin\AppData\Local\Temp\Tar65EA.tmp
MD5:
SHA256:
2916MSBuild.exeC:\Users\admin\AppData\Local\Temp\Cab6668.tmp
MD5:
SHA256:
2916MSBuild.exeC:\Users\admin\AppData\Local\Temp\Tar6669.tmp
MD5:
SHA256:
2916MSBuild.exeC:\Users\admin\AppData\Local\Temp\Cab6698.tmp
MD5:
SHA256:
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
4
TCP/UDP connections
4
DNS requests
2
Threats
2

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
2916
MSBuild.exe
GET
304
67.27.234.126:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
58.6 Kb
whitelisted
2916
MSBuild.exe
GET
200
67.27.234.126:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
58.6 Kb
whitelisted
2916
MSBuild.exe
GET
304
67.27.234.126:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
58.6 Kb
whitelisted
2916
MSBuild.exe
GET
304
67.27.234.126:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
58.6 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
2916
MSBuild.exe
37.221.121.20:6606
jeazerx.duckdns.org
malicious
2916
MSBuild.exe
67.27.234.126:80
www.download.windowsupdate.com
Level 3 Communications, Inc.
US
suspicious

DNS requests

Domain
IP
Reputation
jeazerx.duckdns.org
  • 37.221.121.20
malicious
www.download.windowsupdate.com
  • 67.27.234.126
  • 67.26.73.254
  • 8.248.117.254
  • 67.27.157.126
  • 8.253.95.120
whitelisted

Threats

PID
Process
Class
Message
1040
svchost.exe
Misc activity
ET INFO DYNAMIC_DNS Query to *.duckdns. Domain
2916
MSBuild.exe
A Network Trojan was detected
ET TROJAN Observed Malicious SSL Cert (AsyncRAT Server)
No debug info