gh0strat | a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a

General

Target

a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a.exe
Size

1.4MB
MD5

b0446231b4bd01e19e524dbd1bc77c38
SHA1

18ec565cf16d7f28da0bffbfd25caec2deddee13
SHA256

a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a
SHA512

39770f235bace060eb236064782b7b7c87ade2f9cabdcb2fc35ab3d61a78bea24430f017f82ae1752199b1324a6a4a6fdfb3b0625cd07ddfc54063b4f8f8e8a3
SSDEEP

24576:F39WkOyHutimZ9VSly2hVvHW6qMnSbTBBhBMN6:59qHPkVOBTK6

Score

10^/10

gh0strat purplefox discovery persistence rat rootkit trojan

Malware Config

Signatures

Detect PurpleFox Rootkit 3 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral2/memory/4932-0-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/4660-10-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/912-17-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/4932-0-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/4660-10-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/912-17-0x0000000010000000-0x000000001019F000-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	Skcsk.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"	Skcsk.exe

Executes dropped EXE 2 IoCs

pid	Process
4660	Skcsk.exe
912	Skcsk.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Skcsk.exe	a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a.exe
File opened for modification	C:\Windows\SysWOW64\Skcsk.exe	a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a.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	Skcsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Skcsk.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
1684	cmd.exe
744	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
744	PING.EXE

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
912	Skcsk.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	4932	a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a.exe
Token: SeLoadDriverPrivilege	912	Skcsk.exe
Token: 33	912	Skcsk.exe
Token: SeIncBasePriorityPrivilege	912	Skcsk.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4932 wrote to memory of 1684	4932	a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a.exe	83
PID 4932 wrote to memory of 1684	4932	a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a.exe	83
PID 4932 wrote to memory of 1684	4932	a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a.exe	83
PID 1684 wrote to memory of 744	1684	cmd.exe	85
PID 1684 wrote to memory of 744	1684	cmd.exe	85
PID 1684 wrote to memory of 744	1684	cmd.exe	85
PID 4660 wrote to memory of 912	4660	Skcsk.exe	86
PID 4660 wrote to memory of 912	4660	Skcsk.exe	86
PID 4660 wrote to memory of 912	4660	Skcsk.exe	86

C:\Users\Admin\AppData\Local\Temp\a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a.exe
"C:\Users\Admin\AppData\Local\Temp\a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4932
- 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\A6BF02~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1684
- - 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:744

C:\Windows\SysWOW64\Skcsk.exe
C:\Windows\SysWOW64\Skcsk.exe -auto
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4660
- C:\Windows\SysWOW64\Skcsk.exe
  C:\Windows\SysWOW64\Skcsk.exe -acsi
  2⤵
  - Drops file in Drivers directory
  - Sets service image path in registry
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  PID:912

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\Skcsk.exe

Filesize
1.4MB

MD5
b0446231b4bd01e19e524dbd1bc77c38

SHA1
18ec565cf16d7f28da0bffbfd25caec2deddee13

SHA256
a6bf02a1c601328c60491a45a0cacb86d9405cc0b651142d5b73f29b19520b0a

SHA512
39770f235bace060eb236064782b7b7c87ade2f9cabdcb2fc35ab3d61a78bea24430f017f82ae1752199b1324a6a4a6fdfb3b0625cd07ddfc54063b4f8f8e8a3

Download Submit
memory/912-17-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/4660-10-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/4932-0-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads