gh0strat | edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1

General

Target
edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1.exe
Size 1.3MB
Sample231007-2qch5afg9w
SHA256 edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1
MD5 9894fdd19522d21d7755b276278c4246
SHA1 e8be3b26312f381c41d9d5293458dda837c579ee
SHA512 6a607d1f5c84a3585ab0163953ac5d31ad51c6ea2ea59d892e7bc787d8c233ffd06596e4791d4fff11c728c86e40a4a637c1adca260232afe43286ec411ab4ce
SSDEEP 24576:3OyHutimZ9VSly2hVvHW6qMnSbTBBhBMN7L:qHPkVOBTKn
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

gh0strat purplefox persistence rat rootkit trojan

Malware Config

Signatures

Detect PurpleFox Rootkit 3 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral2/memory/960-0-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/4628-10-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/2324-17-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/960-0-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/4628-10-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/2324-17-0x0000000010000000-0x000000001019F000-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

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
4628	Skcsk.exe
2324	Skcsk.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Skcsk.exe	edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1.exe
File opened for modification	C:\Windows\SysWOW64\Skcsk.exe	edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1.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	Skcsk.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	Skcsk.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	Skcsk.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4488	PING.EXE

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
2324	Skcsk.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	960	edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1.exe
Token: SeLoadDriverPrivilege	2324	Skcsk.exe
Token: 33	2324	Skcsk.exe
Token: SeIncBasePriorityPrivilege	2324	Skcsk.exe
Token: 33	2324	Skcsk.exe
Token: SeIncBasePriorityPrivilege	2324	Skcsk.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 960 wrote to memory of 1328	960	edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1.exe	88
PID 960 wrote to memory of 1328	960	edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1.exe	88
PID 960 wrote to memory of 1328	960	edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1.exe	88
PID 4628 wrote to memory of 2324	4628	Skcsk.exe	89
PID 4628 wrote to memory of 2324	4628	Skcsk.exe	89
PID 4628 wrote to memory of 2324	4628	Skcsk.exe	89
PID 1328 wrote to memory of 4488	1328	cmd.exe	91
PID 1328 wrote to memory of 4488	1328	cmd.exe	91
PID 1328 wrote to memory of 4488	1328	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1.exe
"C:\Users\Admin\AppData\Local\Temp\edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:960
- 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\EDD04D~1.EXE > nul
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1328
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 2 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:4488

C:\Windows\SysWOW64\Skcsk.exe
C:\Windows\SysWOW64\Skcsk.exe -auto
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4628
- 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
  - Modifies data under HKEY_USERS
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  PID:2324

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Skcsk.exe

Path C:\Windows\SysWOW64\Skcsk.exe
Size 1.3MB
SHA256 edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1
MD5 9894fdd19522d21d7755b276278c4246
SHA1 e8be3b26312f381c41d9d5293458dda837c579ee
SHA512 6a607d1f5c84a3585ab0163953ac5d31ad51c6ea2ea59d892e7bc787d8c233ffd06596e4791d4fff11c728c86e40a4a637c1adca260232afe43286ec411ab4ce
SSDEEP 24576:3OyHutimZ9VSly2hVvHW6qMnSbTBBhBMN7L:qHPkVOBTKn
MD5 SHA1 SHA512 SSDEEP

Submit Download

Skcsk.exe

Path C:\Windows\SysWOW64\Skcsk.exe
Size 1.3MB
SHA256 edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1
MD5 9894fdd19522d21d7755b276278c4246
SHA1 e8be3b26312f381c41d9d5293458dda837c579ee
SHA512 6a607d1f5c84a3585ab0163953ac5d31ad51c6ea2ea59d892e7bc787d8c233ffd06596e4791d4fff11c728c86e40a4a637c1adca260232afe43286ec411ab4ce
SSDEEP 24576:3OyHutimZ9VSly2hVvHW6qMnSbTBBhBMN7L:qHPkVOBTKn
MD5 SHA1 SHA512 SSDEEP

Submit Download

Skcsk.exe

Path C:\Windows\SysWOW64\Skcsk.exe
Size 1.3MB
SHA256 edd04d8d101f663566cf0c77ea22f857ec7b8bbcdfe3c5c50b949b9609d065c1
MD5 9894fdd19522d21d7755b276278c4246
SHA1 e8be3b26312f381c41d9d5293458dda837c579ee
SHA512 6a607d1f5c84a3585ab0163953ac5d31ad51c6ea2ea59d892e7bc787d8c233ffd06596e4791d4fff11c728c86e40a4a637c1adca260232afe43286ec411ab4ce
SSDEEP 24576:3OyHutimZ9VSly2hVvHW6qMnSbTBBhBMN7L:qHPkVOBTKn
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/960-0-0x0000000010000000-0x000000001019F000-memory.dmp

Download

memory/2324-17-0x0000000010000000-0x000000001019F000-memory.dmp

Download

memory/4628-10-0x0000000010000000-0x000000001019F000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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