gh0strat | 1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c

General

Target

1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c.exe
Size

1.4MB
MD5

bec0f8f3fdcb0270519a3928fbb92cf7
SHA1

6760871e4c70d7808811b3dac3af32299e8c5150
SHA256

1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c
SHA512

0a6437cbe69cae5c8ecb0700e4b94770ca47b8ff42107c0518e5f56a408ce247f6fb61fbb24759ba2f8c5ea2086c32d2f8f0ec140286f0a7ba7b88f9ae9f61d9
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

resource	yara_rule
behavioral2/memory/640-0-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/2584-10-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/1776-17-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/640-0-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/2584-10-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/1776-17-0x0000000010000000-0x000000001019F000-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
2584	Skcsk.exe
1776	Skcsk.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Skcsk.exe	1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c.exe
File opened for modification	C:\Windows\SysWOW64\Skcsk.exe	1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c.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	1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c.exe
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

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
4156	cmd.exe
4600	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4600	PING.EXE

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
1776	Skcsk.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	640	1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c.exe
Token: SeLoadDriverPrivilege	1776	Skcsk.exe
Token: 33	1776	Skcsk.exe
Token: SeIncBasePriorityPrivilege	1776	Skcsk.exe
Token: 33	1776	Skcsk.exe
Token: SeIncBasePriorityPrivilege	1776	Skcsk.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2584 wrote to memory of 1776	2584	Skcsk.exe	86
PID 2584 wrote to memory of 1776	2584	Skcsk.exe	86
PID 2584 wrote to memory of 1776	2584	Skcsk.exe	86
PID 640 wrote to memory of 4156	640	1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c.exe	85
PID 640 wrote to memory of 4156	640	1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c.exe	85
PID 640 wrote to memory of 4156	640	1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c.exe	85
PID 4156 wrote to memory of 4600	4156	cmd.exe	88
PID 4156 wrote to memory of 4600	4156	cmd.exe	88
PID 4156 wrote to memory of 4600	4156	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c.exe
"C:\Users\Admin\AppData\Local\Temp\1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:640
- 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\1B6698~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4156
- - 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:4600

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:2584
- 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:1776

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
bec0f8f3fdcb0270519a3928fbb92cf7

SHA1
6760871e4c70d7808811b3dac3af32299e8c5150

SHA256
1b6698a35a080b90592e6d3d9e63fdbb692fe6044a9a6dfab5376c86344acb6c

SHA512
0a6437cbe69cae5c8ecb0700e4b94770ca47b8ff42107c0518e5f56a408ce247f6fb61fbb24759ba2f8c5ea2086c32d2f8f0ec140286f0a7ba7b88f9ae9f61d9

Download Submit
memory/640-0-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/1776-17-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/2584-10-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads