gh0strat | a36564a538a3ed6539cfc7ee6d63dd4b7010b1c4f9f9a121833059ac0b073035

General

Target
a36564a538a3ed6539cfc7ee6d63dd4b7010b1c4f9f9a121833059ac0b073035.exe
Size 1.3MB
Sample260801-pctt2avalg
SHA256 a36564a538a3ed6539cfc7ee6d63dd4b7010b1c4f9f9a121833059ac0b073035
MD5 98f12f5df9a194149d608385219521e9
SHA1 d60c11017f18d755aa79f73df31e2b9238c39340
SHA512 51d17b44d9a25f6260937d6221f6ca866695c4c440738e7295d8ec40e19c95d318c1a2f239a273564b5d9655c35b0bf5050558bf4aa4a2d2fa818b447e68a06b
SSDEEP 24576:dOyHutimZ9VSly2hVvHW6qMnSbTBBhBMNk:QHPkVOBTK
TLSH
T1E6557A591BAB4256DB5877B9C8A6A69409090F432F58C4B11E311E1EBD2734FFC23EBC
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution gh0strat purplefox persistence rat rootkit trojan

Malware Config

Signatures

Family: 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
Family: PurpleFox
PurpleFox is an exploit kit used to distribute other malware families and first seen in 2018.
rootkit trojan purplefox

Detect PurpleFox Rootkit 2 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral2/memory/4080-0-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/4164-7-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 2 IoCs

resource	yara_rule
behavioral2/memory/4080-0-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/4164-7-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat

Drops file in Drivers directory 1 IoCs

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

Sets service image path in registry 3 TTPs 1 IoCs

This determines the executable launched when a service starts. It can be used to establish persistence.

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Windows Service

T1543.003

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

Executes dropped EXE 2 IoCs

pid	Process
4164	Phxph.exe
3468	Phxph.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Phxph.exe	a36564a538a3ed6539cfc7ee6d63dd4b7010b1c4f9f9a121833059ac0b073035.exe
File opened for modification	C:\Windows\SysWOW64\Phxph.exe	a36564a538a3ed6539cfc7ee6d63dd4b7010b1c4f9f9a121833059ac0b073035.exe

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4560	cmd.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a36564a538a3ed6539cfc7ee6d63dd4b7010b1c4f9f9a121833059ac0b073035.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Phxph.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Phxph.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
4560	cmd.exe
4272	PING.EXE

Modifies data under HKEY_USERS 3 IoCs

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

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4272	PING.EXE

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
3468	Phxph.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	4080	a36564a538a3ed6539cfc7ee6d63dd4b7010b1c4f9f9a121833059ac0b073035.exe
Token: SeLoadDriverPrivilege	3468	Phxph.exe
Token: 33	3468	Phxph.exe
Token: SeIncBasePriorityPrivilege	3468	Phxph.exe
Token: 33	3468	Phxph.exe
Token: SeIncBasePriorityPrivilege	3468	Phxph.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4080 wrote to memory of 4560	4080	a36564a538a3ed6539cfc7ee6d63dd4b7010b1c4f9f9a121833059ac0b073035.exe	90
PID 4164 wrote to memory of 3468	4164	Phxph.exe	91
PID 4560 wrote to memory of 4272	4560	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\a36564a538a3ed6539cfc7ee6d63dd4b7010b1c4f9f9a121833059ac0b073035.exe
"C:\Users\Admin\AppData\Local\Temp\a36564a538a3ed6539cfc7ee6d63dd4b7010b1c4f9f9a121833059ac0b073035.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4080
- 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\A36564~1.EXE > nul
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4560
- - 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:4272

C:\Windows\SysWOW64\Phxph.exe
C:\Windows\SysWOW64\Phxph.exe -auto
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4164
- C:\Windows\SysWOW64\Phxph.exe
  C:\Windows\SysWOW64\Phxph.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:3468

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

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

Phxph.exe

Path C:\Windows\SysWOW64\Phxph.exe
Size 1.3MB
SHA256 a36564a538a3ed6539cfc7ee6d63dd4b7010b1c4f9f9a121833059ac0b073035
MD5 98f12f5df9a194149d608385219521e9
SHA1 d60c11017f18d755aa79f73df31e2b9238c39340
SHA512 51d17b44d9a25f6260937d6221f6ca866695c4c440738e7295d8ec40e19c95d318c1a2f239a273564b5d9655c35b0bf5050558bf4aa4a2d2fa818b447e68a06b
SSDEEP 24576:dOyHutimZ9VSly2hVvHW6qMnSbTBBhBMNk:QHPkVOBTK
TLSH
T1E6557A591BAB4256DB5877B9C8A6A69409090F432F58C4B11E311E1EBD2734FFC23EBC
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4080-0-0x0000000010000000-0x000000001019F000-memory.dmp

Download

memory/4164-7-0x0000000010000000-0x000000001019F000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads