f6001c8b8d9084654ef5f429e672257b690d651f96e3c493e2f65457b8eabea1

Analysis

max time kernel
133s
max time network
145s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-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

6^/10

persistence

Malware Config

Signatures

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\UserName	GoKuai.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\PassWord	GoKuai.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\Time = 01000000	GoKuai.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\First = 01000000	GoKuai.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\CreateDriver = 01000000	GoKuai.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\RigthMenu = 01000000	GoKuai.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\GoKuai = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe"	Repair.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\GoKuai = "C:\\Users\\Admin\\AppData\\Local\\Temp\\GoKuai.exe mini"	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 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Internet Explorer\Main	GoKuai.exe

Modifies registry class 32 IoCs

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

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2684	GoKuai.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2684	GoKuai.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2060	Repair.exe
2060	Repair.exe
2684	GoKuai.exe
2684	GoKuai.exe
2684	GoKuai.exe
2684	GoKuai.exe
2684	GoKuai.exe
2684	GoKuai.exe
2684	GoKuai.exe
2684	GoKuai.exe
2684	GoKuai.exe
2684	GoKuai.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 2636	2060	Repair.exe	30
PID 2060 wrote to memory of 2636	2060	Repair.exe	30
PID 2060 wrote to memory of 2636	2060	Repair.exe	30
PID 2060 wrote to memory of 2636	2060	Repair.exe	30
PID 2060 wrote to memory of 2636	2060	Repair.exe	30
PID 2060 wrote to memory of 2636	2060	Repair.exe	30
PID 2060 wrote to memory of 2636	2060	Repair.exe	30
PID 2060 wrote to memory of 2684	2060	Repair.exe	31
PID 2060 wrote to memory of 2684	2060	Repair.exe	31
PID 2060 wrote to memory of 2684	2060	Repair.exe	31
PID 2060 wrote to memory of 2684	2060	Repair.exe	31
PID 2060 wrote to memory of 2684	2060	Repair.exe	31
PID 2060 wrote to memory of 2684	2060	Repair.exe	31

C:\Users\Admin\AppData\Local\Temp\Repair.exe
"C:\Users\Admin\AppData\Local\Temp\Repair.exe"
1⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2060
- C:\Windows\SysWOW64\regSvr32.exe
  regSvr32 /s /u "C:\Program Files\GoKuai\GokuaiOverlay.dll"
  2⤵
  PID:2636
- 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:2684

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab3EA8.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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C:\Users\Admin\AppData\Local\Temp\Tar3ED9.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads