gh0strat | cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb

General

Target

cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb.exe
Size

539KB
MD5

00a51de13a28d65f98cc913eff69f020
SHA1

3b449beec1264a938d2f45d42b854ebc537adb6a
SHA256

cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb
SHA512

18d0eb4f8a894565c9883eee20ef3c8eb2b3105c757774e70a0f68d609b6809aef26e2a7042b6620a5d114419352ef0b769e2de43b1257f46e4cc34e74482b60
SSDEEP

12288:lhymnwJFPNdgBAEHApqePJN1AmLM7uVq9sSn:lUmwrl2Ao7sJNlM7ymsSn

Score

10^/10

gh0strat purplefox discovery persistence rat rootkit trojan upx

Malware Config

Signatures

Detect PurpleFox Rootkit 5 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral1/memory/3384-2-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral1/memory/3548-12-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral1/memory/3384-18-0x0000000000400000-0x0000000000547000-memory.dmp	purplefox_rootkit
behavioral1/memory/3548-28-0x0000000000400000-0x0000000000547000-memory.dmp	purplefox_rootkit
behavioral1/memory/1864-39-0x0000000000400000-0x0000000000547000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 5 IoCs

resource	yara_rule
behavioral1/memory/3384-2-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral1/memory/3548-12-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral1/memory/3384-18-0x0000000000400000-0x0000000000547000-memory.dmp	family_gh0strat
behavioral1/memory/3548-28-0x0000000000400000-0x0000000000547000-memory.dmp	family_gh0strat
behavioral1/memory/1864-39-0x0000000000400000-0x0000000000547000-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
3548	Skcsk.exe
1864	Skcsk.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/3384-0-0x0000000000400000-0x0000000000547000-memory.dmp	upx
behavioral1/files/0x000c000000023f26-10.dat	upx
behavioral1/memory/3384-18-0x0000000000400000-0x0000000000547000-memory.dmp	upx
behavioral1/memory/3548-28-0x0000000000400000-0x0000000000547000-memory.dmp	upx
behavioral1/memory/1864-20-0x0000000000400000-0x0000000000547000-memory.dmp	upx
behavioral1/memory/1864-39-0x0000000000400000-0x0000000000547000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\AppPatch\Skcsk.exe	cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb.exe
File created	C:\Program Files (x86)\AppPatch\Skcsk.exe	cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb.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	cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb.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
1652	cmd.exe
4820	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4820	PING.EXE

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
1864	Skcsk.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	3384	cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb.exe
Token: SeLoadDriverPrivilege	1864	Skcsk.exe
Token: 33	1864	Skcsk.exe
Token: SeIncBasePriorityPrivilege	1864	Skcsk.exe
Token: 33	1864	Skcsk.exe
Token: SeIncBasePriorityPrivilege	1864	Skcsk.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3384 wrote to memory of 1652	3384	cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb.exe	88
PID 3384 wrote to memory of 1652	3384	cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb.exe	88
PID 3384 wrote to memory of 1652	3384	cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb.exe	88
PID 3548 wrote to memory of 1864	3548	Skcsk.exe	90
PID 3548 wrote to memory of 1864	3548	Skcsk.exe	90
PID 3548 wrote to memory of 1864	3548	Skcsk.exe	90
PID 1652 wrote to memory of 4820	1652	cmd.exe	91
PID 1652 wrote to memory of 4820	1652	cmd.exe	91
PID 1652 wrote to memory of 4820	1652	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb.exe
"C:\Users\Admin\AppData\Local\Temp\cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3384
- 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\CF483F~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1652
- - 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:4820

C:\Program Files (x86)\AppPatch\Skcsk.exe
"C:\Program Files (x86)\AppPatch\Skcsk.exe" -auto
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3548
- C:\Program Files (x86)\AppPatch\Skcsk.exe
  "C:\Program Files (x86)\AppPatch\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:1864

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:\Program Files (x86)\AppPatch\Skcsk.exe

Filesize
539KB

MD5
00a51de13a28d65f98cc913eff69f020

SHA1
3b449beec1264a938d2f45d42b854ebc537adb6a

SHA256
cf483fcd519f796fa35c14c81a03808d81bdd50dfd553679169dc50cf5c76ecb

SHA512
18d0eb4f8a894565c9883eee20ef3c8eb2b3105c757774e70a0f68d609b6809aef26e2a7042b6620a5d114419352ef0b769e2de43b1257f46e4cc34e74482b60

Download Submit
memory/1864-20-0x0000000000400000-0x0000000000547000-memory.dmp

Filesize
1.3MB

Download
memory/1864-39-0x0000000000400000-0x0000000000547000-memory.dmp

Filesize
1.3MB

Download
memory/3384-0-0x0000000000400000-0x0000000000547000-memory.dmp

Filesize
1.3MB

Download
memory/3384-2-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/3384-18-0x0000000000400000-0x0000000000547000-memory.dmp

Filesize
1.3MB

Download
memory/3548-12-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/3548-28-0x0000000000400000-0x0000000000547000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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