gh0strat | d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10

General

Target

d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exe
Size

1.4MB
MD5

e865dba7243f040c0f382dad5af18d46
SHA1

217338601785a591b4f48ca263bc1c0eeb67f2ba
SHA256

d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10
SHA512

445b8f0a4ebbcbcf1e70c649a9db9dbab9307daf96182a1a636d44c982a7bbef870d5579b6d686feab41a65d863c367191891bc740af8f77707320ba09b121a7
SSDEEP

24576:F39WkOyHutimZ9VSly2hVvHW6qMnSbTBBhBMN:59qHPkVOBTK

Score

10^/10

gh0strat purplefox discovery persistence rat rootkit trojan

Malware Config

Signatures

Detect PurpleFox Rootkit 3 IoCs

Detect PurpleFox Rootkit.

rootkit

Processes:

resource	yara_rule
behavioral2/memory/3904-0-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/3732-10-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/4592-17-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3904-0-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/3732-10-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/4592-17-0x0000000010000000-0x000000001019F000-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
PurpleFox
PurpleFox is an exploit kit used to distribute other malware families and first seen in 2018.
rootkit trojan purplefox

Drops file in Drivers directory 1 IoCs

Processes:

Skcsk.exe

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

Processes:

Skcsk.exe

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

Executes dropped EXE 2 IoCs

Processes:

Skcsk.exeSkcsk.exe

pid	Process
3732	Skcsk.exe
4592	Skcsk.exe

Drops file in System32 directory 2 IoCs

Processes:

d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exe

description	ioc	Process
File created	C:\Windows\SysWOW64\Skcsk.exe	d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exe
File opened for modification	C:\Windows\SysWOW64\Skcsk.exe	d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.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

Processes:

cmd.exePING.EXESkcsk.exed881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exeSkcsk.exe

description	ioc	Process
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	Skcsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Skcsk.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

Processes:

cmd.exePING.EXE

pid	Process
2260	cmd.exe
1856	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
1856	PING.EXE

Suspicious behavior: LoadsDriver 1 IoCs

Processes:

Skcsk.exe

pid	Process
4592	Skcsk.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exeSkcsk.exe

description	pid	Process
Token: SeIncBasePriorityPrivilege	3904	d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exe
Token: SeLoadDriverPrivilege	4592	Skcsk.exe
Token: 33	4592	Skcsk.exe
Token: SeIncBasePriorityPrivilege	4592	Skcsk.exe
Token: 33	4592	Skcsk.exe
Token: SeIncBasePriorityPrivilege	4592	Skcsk.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exeSkcsk.execmd.exe

description	pid	Process	procid_target
PID 3904 wrote to memory of 2260	3904	d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exe	86
PID 3904 wrote to memory of 2260	3904	d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exe	86
PID 3904 wrote to memory of 2260	3904	d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exe	86
PID 3732 wrote to memory of 4592	3732	Skcsk.exe	87
PID 3732 wrote to memory of 4592	3732	Skcsk.exe	87
PID 3732 wrote to memory of 4592	3732	Skcsk.exe	87
PID 2260 wrote to memory of 1856	2260	cmd.exe	89
PID 2260 wrote to memory of 1856	2260	cmd.exe	89
PID 2260 wrote to memory of 1856	2260	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exe
"C:\Users\Admin\AppData\Local\Temp\d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3904
- 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\D88135~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2260
- - 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:1856

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:3732
- 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:4592

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
e865dba7243f040c0f382dad5af18d46

SHA1
217338601785a591b4f48ca263bc1c0eeb67f2ba

SHA256
d881356ee2ec0f32aac48b011d996f8a4e4efc1e035ea7584fd19eaad64d5c10

SHA512
445b8f0a4ebbcbcf1e70c649a9db9dbab9307daf96182a1a636d44c982a7bbef870d5579b6d686feab41a65d863c367191891bc740af8f77707320ba09b121a7

Download Submit
memory/3732-10-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/3904-0-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/4592-17-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads