gh0strat | f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c

General

Target

f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c.exe
Size

1.3MB
MD5

3269952f4f0fab14f35a9f486c04b207
SHA1

19f9b48412d59a8d822ab4ed0e2c5a00b5ab6df9
SHA256

f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c
SHA512

be9db9a01a53e55e0c328f1b47db952aaf1f7b4a96e31dc28017d69b47748470c92a9315fee42cc08f487f82cc195821023347939c5c0ec2b1bb79a43fd7a35a
SSDEEP

24576:dOyHutimZ9VSly2hVvHW6qMnSbTBBhBMN9:QHPkVOBTK

Score

10^/10

gh0strat purplefox discovery persistence rat rootkit trojan

Malware Config

Signatures

Detect PurpleFox Rootkit 1 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral1/memory/2164-0-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 1 IoCs

resource	yara_rule
behavioral1/memory/2164-0-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat

Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat
Gh0strat family
gh0strat
PurpleFox
PurpleFox is an exploit kit used to distribute other malware families and first seen in 2018.
rootkit trojan purplefox
Purplefox family
purplefox

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\drivers\QAssist.sys	sainbox.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\QAssist\ImagePath = "system32\\DRIVERS\\QAssist.sys"	sainbox.exe

Deletes itself 1 IoCs

pid	Process
2668	cmd.exe

Executes dropped EXE 2 IoCs

pid	Process
2744	sainbox.exe
2652	sainbox.exe

Loads dropped DLL 1 IoCs

pid	Process
2744	sainbox.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\sainbox.exe	f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c.exe
File opened for modification	C:\Windows\SysWOW64\sainbox.exe	f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c.exe

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sainbox.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sainbox.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2668	cmd.exe
2112	PING.EXE

Modifies data under HKEY_USERS 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	sainbox.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	sainbox.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	sainbox.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	sainbox.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2112	PING.EXE

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
2652	sainbox.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2164	f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c.exe
Token: SeLoadDriverPrivilege	2652	sainbox.exe
Token: 33	2652	sainbox.exe
Token: SeIncBasePriorityPrivilege	2652	sainbox.exe
Token: 33	2652	sainbox.exe
Token: SeIncBasePriorityPrivilege	2652	sainbox.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2164 wrote to memory of 2668	2164	f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c.exe	31
PID 2164 wrote to memory of 2668	2164	f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c.exe	31
PID 2164 wrote to memory of 2668	2164	f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c.exe	31
PID 2164 wrote to memory of 2668	2164	f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c.exe	31
PID 2744 wrote to memory of 2652	2744	sainbox.exe	33
PID 2744 wrote to memory of 2652	2744	sainbox.exe	33
PID 2744 wrote to memory of 2652	2744	sainbox.exe	33
PID 2744 wrote to memory of 2652	2744	sainbox.exe	33
PID 2668 wrote to memory of 2112	2668	cmd.exe	34
PID 2668 wrote to memory of 2112	2668	cmd.exe	34
PID 2668 wrote to memory of 2112	2668	cmd.exe	34
PID 2668 wrote to memory of 2112	2668	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c.exe
"C:\Users\Admin\AppData\Local\Temp\f91caaeddec74de158ce8f6c6dab7c2c3c6a881c6009b4b9b473fcd3f825d40c.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2164
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ping -n 2 127.0.0.1 > nul && del C:\Users\Admin\AppData\Local\Temp\F91CAA~1.EXE > nul
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2668
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 2 127.0.0.1
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2112

C:\Windows\SysWOW64\sainbox.exe
C:\Windows\SysWOW64\sainbox.exe -auto
1⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2744
- C:\Windows\SysWOW64\sainbox.exe
  C:\Windows\SysWOW64\sainbox.exe -acsi
  2⤵
  - Drops file in Drivers directory
  - Sets service image path in registry
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  PID:2652