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File name:

Flashplayerpp_install_cn (1).exe

Full analysis: https://app.any.run/tasks/3fd032a3-3c13-41a2-8fc6-63e25fbf4b14
Verdict: Malicious activity
Threats:

Cobalt Strike is a legitimate penetration software toolkit developed by Forta. But its cracked versions are widely adopted by bad actors, who use it as a C2 system of choice for targeted attacks.

Malware Trends Tracker     >>>
Analysis date: October 20, 2020, 05:31:08
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:
trojan
cobaltstrike
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
MD5:

ABCE428BE48EC9A8C5B0A7832A09B29B

SHA1:

D56172C8E37EC65F0C89E18C9AA21A9B7AC93CC8

SHA256:

F5F6C9FF45502589B27092739A53142D1D1F46470C9A16556896AE9BFA83CB58

SSDEEP:

49152:Ig8N0jZCuqrq7ql7y9SSSSx7cSSSSSSuCCCCCCWZEIZEEk3NhT0wsRjJeGNHDdAW:

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

    • Application was dropped or rewritten from another process

      • FlashRepairToolInstaller.exe (PID: 3072)
      • AT.exe (PID: 4048)
      • FlashRepairTool.exe (PID: 3664)

    • Loads the Task Scheduler COM API

      • AT.exe (PID: 4048)

    • Starts Visual C# compiler

      • MSBuild.exe (PID: 3336)

    • Loads dropped or rewritten executable

      • FlashRepairToolInstaller.exe (PID: 3072)

    • Connects to CnC server

      • calc.exe (PID: 3040)

    • COBALTSTRIKE was detected

      • calc.exe (PID: 3040)

    • Changes settings of System certificates

      • calc.exe (PID: 3040)

  • SUSPICIOUS

    • Executable content was dropped or overwritten

      • Flashplayerpp_install_cn (1).exe (PID: 3756)
      • FlashRepairToolInstaller.exe (PID: 3072)

    • Reads Internet Cache Settings

      • calc.exe (PID: 3040)
      • FlashRepairTool.exe (PID: 3664)

    • Creates files in the program directory

      • FlashRepairToolInstaller.exe (PID: 3072)

    • Creates files in the user directory

      • FlashRepairToolInstaller.exe (PID: 3072)

    • Changes IE settings (feature browser emulation)

      • FlashRepairToolInstaller.exe (PID: 3072)

    • Creates a software uninstall entry

      • FlashRepairToolInstaller.exe (PID: 3072)

  • 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.) (82.9)
.dll | Win32 Dynamic Link Library (generic) (7.4)
.exe | Win32 Executable (generic) (5.1)
.exe | Generic Win/DOS Executable (2.2)
.exe | DOS Executable Generic (2.2)

EXIF

EXE

MachineType: Intel 386 or later, and compatibles
TimeStamp: 2096:09:28 03:54:26+02:00
PEType: PE32
LinkerVersion: 48
CodeSize: 7442944
InitializedDataSize: 38912
UninitializedDataSize: -
EntryPoint: 0x71b19e
OSVersion: 4
ImageVersion: -
SubsystemVersion: 4
Subsystem: Windows GUI
FileVersionNumber: 1.0.0.0
ProductVersionNumber: 1.0.0.0
FileFlagsMask: 0x003f
FileFlags: (none)
FileOS: Win32
ObjectFileType: Executable application
FileSubtype: -
LanguageCode: Neutral
CharacterSet: Unicode
Comments: -
CompanyName: -
FileDescription: flashplayerpp_install_cn
FileVersion: 1.0.0.0
InternalName: Flashplayerpp_install_cn.exe
LegalCopyright: Copyright © 2020
LegalTrademarks: -
OriginalFileName: Flashplayerpp_install_cn.exe
ProductName: flashplayerpp_install_cn
ProductVersion: 1.0.0.0
AssemblyVersion: 1.0.0.0

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 22-Aug-1960 19:26:10
Debug artifacts:
  • E:\Learning Record\CSharp\flashplayerpp_install_cn\obj\Debug\Flashplayerpp_install_cn.pdb
Comments: -
CompanyName: -
FileDescription: flashplayerpp_install_cn
FileVersion: 1.0.0.0
InternalName: Flashplayerpp_install_cn.exe
LegalCopyright: Copyright © 2020
LegalTrademarks: -
OriginalFilename: Flashplayerpp_install_cn.exe
ProductName: flashplayerpp_install_cn
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: 22-Aug-1960 19:26:10
Pointer to Symbol Table: 0x00000000
Number of symbols: 0
Size of Optional Header: 0x00E0
Characteristics:
  • IMAGE_FILE_EXECUTABLE_IMAGE
  • IMAGE_FILE_LARGE_ADDRESS_AWARE

Sections

Name
Virtual Address
Virtual Size
Raw Size
Charateristics
Entropy
.text
0x00002000
0x007191A4
0x00719200
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
3.97777
.rsrc
0x0071C000
0x00009510
0x00009600
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
5.97943
.reloc
0x00726000
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
5.88227
3301
UNKNOWN
UNKNOWN
RT_MANIFEST
2
3.09028
2216
UNKNOWN
UNKNOWN
RT_ICON
3
2.05167
1384
UNKNOWN
UNKNOWN
RT_ICON
4
7.89204
10847
UNKNOWN
UNKNOWN
RT_ICON
5
3.43985
9640
UNKNOWN
UNKNOWN
RT_ICON
6
3.58326
4264
UNKNOWN
UNKNOWN
RT_ICON
7
4.01266
1128
UNKNOWN
UNKNOWN
RT_ICON
32512
2.71858
104
UNKNOWN
UNKNOWN
RT_GROUP_ICON

Imports

mscoree.dll
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
50
Monitored processes
9
Malicious processes
4
Suspicious processes
0

Behavior graph

Click at the process to see the details
drop and start drop and start start drop and start flashplayerpp_install_cn (1).exe no specs flashplayerpp_install_cn (1).exe flashrepairtoolinstaller.exe msbuild.exe no specs at.exe csc.exe no specs cvtres.exe no specs #COBALTSTRIKE calc.exe flashrepairtool.exe

Process information

PID
CMD
Path
Indicators
Parent process
3228"C:\Users\admin\AppData\Local\Temp\Flashplayerpp_install_cn (1).exe" C:\Users\admin\AppData\Local\Temp\Flashplayerpp_install_cn (1).exe—explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
flashplayerpp_install_cn
Exit code:
3221226540
Version:
1.0.0.0
Modules
Images
c:\users\admin\appdata\local\temp\flashplayerpp_install_cn (1).exe
c:\systemroot\system32\ntdll.dll
3756"C:\Users\admin\AppData\Local\Temp\Flashplayerpp_install_cn (1).exe" C:\Users\admin\AppData\Local\Temp\Flashplayerpp_install_cn (1).exe
explorer.exe
User:
admin
Integrity Level:
HIGH
Description:
flashplayerpp_install_cn
Exit code:
0
Version:
1.0.0.0
Modules
Images
c:\users\admin\appdata\local\temp\flashplayerpp_install_cn (1).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
3072"C:\Users\admin\AppData\Local\Temp\FlashRepairToolInstaller.exe"C:\Users\admin\AppData\Local\Temp\FlashRepairToolInstaller.exe
Flashplayerpp_install_cn (1).exe
User:
admin
Integrity Level:
HIGH
Description:
Flash Player修复工具 Installer
Exit code:
1
Version:
1.0.5.5840
Modules
Images
c:\users\admin\appdata\local\temp\flashrepairtoolinstaller.exe
c:\systemroot\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\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shell32.dll
3336"C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe" C:\Users\admin\AppData\Local\bin\WinUpdate.xmlC:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe—Flashplayerpp_install_cn (1).exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
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
4048"C:\Users\admin\AppData\Local\Temp\AT.exe"C:\Users\admin\AppData\Local\Temp\AT.exe
Flashplayerpp_install_cn (1).exe
User:
admin
Integrity Level:
HIGH
Description:
AddTasks
Exit code:
3762504530
Version:
1.0.0.0
Modules
Images
c:\users\admin\appdata\local\temp\at.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
3164"C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\admin\AppData\Local\Temp\0d2n4oit\0d2n4oit.cmdline"C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe—MSBuild.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Visual C# Command Line Compiler
Exit code:
0
Version:
4.7.3062.0 built by: NET472REL1
Modules
Images
c:\windows\microsoft.net\framework\v4.0.30319\csc.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\msvcr120_clr0400.dll
c:\windows\system32\gdi32.dll
2272C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\admin\AppData\Local\Temp\RES645C.tmp" "c:\Users\admin\AppData\Local\Temp\0d2n4oit\CSC47FA4DD4E65A41459C3FCC4499432FB2.TMP"C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe—csc.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Microsoft® Resource File To COFF Object Conversion Utility
Exit code:
0
Version:
12.00.52519.0 built by: VSWINSERVICING
Modules
Images
c:\windows\microsoft.net\framework\v4.0.30319\cvtres.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\msvcr120_clr0400.dll
c:\windows\system32\cryptsp.dll
3040"C:\Windows\System32\calc.exe"C:\Windows\System32\calc.exe
MSBuild.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Windows Calculator
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\calc.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\shell32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shlwapi.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\user32.dll
c:\windows\system32\lpk.dll
3664"C:\Program Files\FlashRepairTool\\FlashRepairTool.exe" InstallC:\Program Files\FlashRepairTool\FlashRepairTool.exe
FlashRepairToolInstaller.exe
User:
admin
Company:
重庆重橙网络科技有限公司
Integrity Level:
HIGH
Description:
Flash Player 修复工具
Exit code:
0
Version:
1.0.5.5840
Modules
Images
c:\program files\flashrepairtool\flashrepairtool.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\ws2_32.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\nsi.dll
c:\windows\system32\wldap32.dll
c:\windows\system32\user32.dll
Total events
733
Read events
474
Write events
0
Delete events
0

Modification events

No data
Executable files
14
Suspicious files
11
Text files
3
Unknown types
4

Dropped files

PID
Process
Filename
Type
3164csc.exeC:\Users\admin\AppData\Local\Temp\0d2n4oit\CSC47FA4DD4E65A41459C3FCC4499432FB2.TMP —
MD5:—
SHA256:—
3164csc.exeC:\Users\admin\AppData\Local\Temp\0d2n4oit\0d2n4oit.pdb —
MD5:—
SHA256:—
3164csc.exeC:\Users\admin\AppData\Local\Temp\0d2n4oit\0d2n4oit.dll —
MD5:—
SHA256:—
2272cvtres.exeC:\Users\admin\AppData\Local\Temp\RES645C.tmp —
MD5:—
SHA256:—
3164csc.exeC:\Users\admin\AppData\Local\Temp\0d2n4oit\0d2n4oit.out —
MD5:—
SHA256:—
3040calc.exeC:\Users\admin\AppData\Local\Temp\Cab6C1C.tmp —
MD5:—
SHA256:—
3040calc.exeC:\Users\admin\AppData\Local\Temp\Tar6C1D.tmp —
MD5:—
SHA256:—
3040calc.exeC:\Users\admin\AppData\Local\Temp\Cab6C3E.tmp —
MD5:—
SHA256:—
3040calc.exeC:\Users\admin\AppData\Local\Temp\Tar6C3F.tmp —
MD5:—
SHA256:—
3040calc.exeC:\Users\admin\AppData\Local\Temp\Cab6D2A.tmp —
MD5:—
SHA256:—
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
11
TCP/UDP connections
17
DNS requests
4
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
3072
FlashRepairToolInstaller.exe
GET
200
112.65.212.142:80
http://tongji.flash.cn/hm4.gif?product=repairtools&event=install&uid=533E95D3AA78C4092F0AA9C694122A75&um={3283428F-CBB3-4b03-91D0-C4BD8762A8A7}&platform=Windows&channel=10000&version=1.0.5.5840&key=0&data={"result":0,"time":1603171909,"osversion":"6.1.7601.17932","arch":"x86"}&signature=6f1c21d0713ca70a81e338c8835ea977
CN
—
—
whitelisted
3040
calc.exe
GET
200
8.248.113.254:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
57.5 Kb
whitelisted
3756
Flashplayerpp_install_cn (1).exe
GET
200
35.241.76.6:80
http://www.flash-load.ml/api.php?up=up
US
binary
20 b
malicious
3040
calc.exe
GET
304
8.248.113.254:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
57.5 Kb
whitelisted
3040
calc.exe
GET
304
8.248.113.254:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
57.5 Kb
whitelisted
3040
calc.exe
GET
304
8.248.113.254:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
57.5 Kb
whitelisted
3040
calc.exe
GET
304
8.248.113.254:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
57.5 Kb
whitelisted
3040
calc.exe
GET
304
8.248.113.254:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
57.5 Kb
whitelisted
3040
calc.exe
GET
304
8.248.113.254:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
57.5 Kb
whitelisted
3040
calc.exe
GET
304
8.248.113.254:80
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
US
compressed
57.5 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
3040
calc.exe
35.241.76.6:443
www.flash-load.ml
—
US
malicious
3072
FlashRepairToolInstaller.exe
112.65.212.142:80
tongji.flash.cn
China Unicom Shanghai network
CN
suspicious
3756
Flashplayerpp_install_cn (1).exe
35.241.76.6:80
www.flash-load.ml
—
US
malicious
3040
calc.exe
8.248.113.254:80
www.download.windowsupdate.com
Level 3 Communications, Inc.
US
suspicious
3664
FlashRepairTool.exe
112.65.212.142:443
tongji.flash.cn
China Unicom Shanghai network
CN
suspicious
3664
FlashRepairTool.exe
119.28.164.234:443
api.flash.cn
Tencent Cloud Computing (Beijing) Co., Ltd
CN
unknown

DNS requests

Domain
IP
Reputation
www.flash-load.ml
  • 35.241.76.6
malicious
www.download.windowsupdate.com
  • 8.248.113.254
  • 67.27.158.126
  • 67.27.157.126
  • 8.248.119.254
  • 8.248.131.254
whitelisted
tongji.flash.cn
  • 112.65.212.142
  • 101.206.186.26
  • 36.248.26.196
  • 140.207.234.15
  • 101.206.209.167
  • 112.65.212.141
  • 116.162.6.44
  • 42.56.81.22
  • 101.206.186.23
  • 42.236.125.43
  • 111.202.99.170
  • 101.206.209.168
  • 111.202.99.172
  • 140.207.234.16
  • 116.153.36.154
whitelisted
api.flash.cn
  • 119.28.164.234
  • 203.205.224.59
suspicious

Threats

PID
Process
Class
Message
—
—
Potentially Bad Traffic
ET INFO DNS Query for Suspicious .ml Domain
10 ETPRO signatures available at the full report
No debug info
Interactive malware hunting service ANY.RUN
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ANY.RUN
Reports
Flashplayerpp_install_cn (1).exe