f6001c8b8d9084654ef5f429e672257b690d651f96e3c493e2f65457b8eabea1

Analysis

max time kernel
53s
max time network
63s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
04-07-2024 23:23

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General

Target

Repair.exe
Size

46KB
MD5

fab3670d83ca9a389eed0742c10bc497
SHA1

4c8c3a5bbf232ed39c274c463e539e545df03131
SHA256

e48adfb8a113f3eef6b0556297a9496470a4fed1b3faa30dac6961e9a040d2a2
SHA512

af350b6a625037b97cdc7930c6b1bda6404d0e71f12b481648e401b5026371dc1ef22d1a69cbb0c6f36b71d0dbf0daf4458226a9103274d54d108d8dd208426e
SSDEEP

768:zlENqy80anHUtH7HfWyOBTB1dXsGi+AXNtKHxZfAXwYLl8ie:zuF80aHUtjOHvsL5NtKffkhp8d

Score

7^/10

persistence

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Repair.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	Repair.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

GoKuai.exeRepair.exe

description	ioc	Process
Set value (data)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CreateDriver = 01000000	GoKuai.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RigthMenu = 01000000	GoKuai.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\GoKuai = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe"	Repair.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\GoKuai = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe mini"	GoKuai.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\UserName	GoKuai.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\PassWord	GoKuai.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Time = 01000000	GoKuai.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\First = 01000000	GoKuai.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 4 IoCs

adware spyware

Modify Registry

T1112

Processes:

GoKuai.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	GoKuai.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	GoKuai.exe
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Internet Explorer\IESettingSync	GoKuai.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Internet Explorer\IESettingSync\SlowSettingTypesChanged = "2"	GoKuai.exe

Modifies registry class 32 IoCs

Processes:

Repair.exeGoKuai.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shell\¹»¿ìÉÏ´«	Repair.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shell\¹»¿ìÉÏ´«\command	Repair.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe %1 folder"	Repair.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\ = "¹»¿ìÎÄ¼þÉÏ´«"	GoKuai.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«	Repair.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\ = "¹»¿ìÎÄ¼þÉÏ´«"	Repair.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\Message = 00000000	GoKuai.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\Scandisk = 02000000	GoKuai.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shell\¹»¿ìÉÏ´«\command\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe %1 upload"	Repair.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\Icon = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe"	Repair.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command	Repair.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shell\¹»¿ìÉÏ´«\ = "¹»¿ìÎÄ¼þÉÏ´«"	GoKuai.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\Agent = 00000000	GoKuai.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\AgentPassword	GoKuai.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\AgentIP	GoKuai.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\CurrentPath	GoKuai.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shell\¹»¿ìÉÏ´«	GoKuai.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command	GoKuai.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe %1 folder"	GoKuai.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\AgentUseUser = 00000000	GoKuai.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shell\¹»¿ìÉÏ´«\Icon = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe"	GoKuai.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shell\¹»¿ìÉÏ´«\command\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe %1 upload"	GoKuai.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\Icon = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe"	GoKuai.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\NetType = 00000000	GoKuai.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\AgentPort = 00000000	GoKuai.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shell\¹»¿ìÉÏ´«\Icon = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe"	Repair.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\Log = 00000000	GoKuai.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\AgentUser	GoKuai.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shell\¹»¿ìÉÏ´«\ = "¹»¿ìÎÄ¼þÉÏ´«"	Repair.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shell\¹»¿ìÉÏ´«\command	GoKuai.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«	GoKuai.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shell\¹»¿ìÉÏ´«\command\Recevies = 02000000	GoKuai.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

GoKuai.exe

pid	Process
1992	GoKuai.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

GoKuai.exe

pid	Process
1992	GoKuai.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

Repair.exeGoKuai.exe

pid	Process
1856	Repair.exe
1856	Repair.exe
1992	GoKuai.exe
1992	GoKuai.exe
1992	GoKuai.exe
1992	GoKuai.exe
1992	GoKuai.exe
1992	GoKuai.exe
1992	GoKuai.exe
1992	GoKuai.exe
1992	GoKuai.exe
1992	GoKuai.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

Repair.exe

description	pid	Process	procid_target
PID 1856 wrote to memory of 1844	1856	Repair.exe	80
PID 1856 wrote to memory of 1844	1856	Repair.exe	80
PID 1856 wrote to memory of 1844	1856	Repair.exe	80
PID 1856 wrote to memory of 1992	1856	Repair.exe	82
PID 1856 wrote to memory of 1992	1856	Repair.exe	82
PID 1856 wrote to memory of 1992	1856	Repair.exe	82
PID 1856 wrote to memory of 1992	1856	Repair.exe	82
PID 1856 wrote to memory of 1992	1856	Repair.exe	82

C:\Users\Admin\AppData\Local\Temp\Repair.exe
"C:\Users\Admin\AppData\Local\Temp\Repair.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1856
- C:\Windows\SysWOW64\regSvr32.exe
  regSvr32 /s /u "C:\Program Files\GoKuai\GokuaiOverlay.dll"
  2⤵
  PID:1844
- C:\Users\Admin\AppData\Local\Temp\GoKuai.exe
  "C:\Users\Admin\AppData\Local\Temp\GoKuai.exe"
  2⤵
  - Adds Run key to start application
  - Modifies Internet Explorer settings
  - Modifies registry class
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:1992

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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