gh0strat | 39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa

General

Target

39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.exe
Size

1.4MB
MD5

5b22d7770f0a13b132abe8225d3d0840
SHA1

95054ea7916a1c004972c8d6c657b6da31143104
SHA256

39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa
SHA512

46dd14c8cec28a2ff6ab968705c2b3bac2cb5a99249d7380c6c3b8afba7a10163916276546ed9420f9f189cf6ffd8f2b953f9a0255294f778e5e0e0a83164117
SSDEEP

24576:n39WkOyHutimZ9VSly2hVvHW6qMnSbTBBhBMN:39qHPkVOBTK

Score

10^/10

gh0strat purplefox discovery persistence rat rootkit trojan

Malware Config

Signatures

Detect PurpleFox Rootkit 2 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral2/memory/2940-1-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/1924-12-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 2 IoCs

resource	yara_rule
behavioral2/memory/2940-1-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/1924-12-0x0000000010000000-0x000000001019F000-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
1924	Skcsk.exe
2960	Skcsk.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Skcsk.exe	39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.exe
File opened for modification	C:\Windows\SysWOW64\Skcsk.exe	39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.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	Skcsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.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
4476	PING.EXE
2264	cmd.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4476	PING.EXE

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
2960	Skcsk.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2940	39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.exe
Token: SeLoadDriverPrivilege	2960	Skcsk.exe
Token: 33	2960	Skcsk.exe
Token: SeIncBasePriorityPrivilege	2960	Skcsk.exe
Token: 33	2960	Skcsk.exe
Token: SeIncBasePriorityPrivilege	2960	Skcsk.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2940 wrote to memory of 2264	2940	39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.exe	86
PID 2940 wrote to memory of 2264	2940	39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.exe	86
PID 2940 wrote to memory of 2264	2940	39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.exe	86
PID 1924 wrote to memory of 2960	1924	Skcsk.exe	87
PID 1924 wrote to memory of 2960	1924	Skcsk.exe	87
PID 1924 wrote to memory of 2960	1924	Skcsk.exe	87
PID 2264 wrote to memory of 4476	2264	cmd.exe	89
PID 2264 wrote to memory of 4476	2264	cmd.exe	89
PID 2264 wrote to memory of 4476	2264	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.exe
"C:\Users\Admin\AppData\Local\Temp\39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2940
- 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\39644B~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2264
- - 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:4476

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:1924
- 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:2960

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
5b22d7770f0a13b132abe8225d3d0840

SHA1
95054ea7916a1c004972c8d6c657b6da31143104

SHA256
39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa

SHA512
46dd14c8cec28a2ff6ab968705c2b3bac2cb5a99249d7380c6c3b8afba7a10163916276546ed9420f9f189cf6ffd8f2b953f9a0255294f778e5e0e0a83164117

Download Submit
memory/1924-12-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/2940-0-0x0000000000400000-0x0000000000580000-memory.dmp

Filesize
1.5MB

Download
memory/2940-1-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads