gh0strat | e629bc8537e7d2eac57fb30ad012aa611bfb24d25dd9f3ee1e0dcade5de3e4b8

Analysis

max time kernel
146s
max time network
154s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
14-09-2024 18:56

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General

Target

SoftUpdate.exe
Size

27.6MB
MD5

be076ac2e070b1c8c49f57fe79f06aea
SHA1

10c9f353e157a3017f5482375f58ace03145625f
SHA256

e629bc8537e7d2eac57fb30ad012aa611bfb24d25dd9f3ee1e0dcade5de3e4b8
SHA512

d04b05587ba8ab19bfbb13ed071886fe1d4f44a96e17f2f92b91859593e67c0d35583649b5eb0cd4b9cbaffc596a0cabdec46d6bbc2babc2b71b4ecbcef99347
SSDEEP

393216:OPFEwrPDbAmelQl0KX7Bf+alNnblYGAnpqpPgqjcS50YSs3mquw3BJ6nNKYSFLwK:OGyLjekFBflfblKmcS52hw3XnpVnOXm

Score

10^/10

gh0strat purplefox discovery rat rootkit trojan

Malware Config

Signatures

Detect PurpleFox Rootkit 1 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral1/memory/2276-17402-0x0000000000400000-0x0000000001F8C000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 1 IoCs

resource	yara_rule
behavioral1/memory/2276-17402-0x0000000000400000-0x0000000001F8C000-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

Deletes itself 1 IoCs

pid	Process
14976	cmd.exe

Executes dropped EXE 2 IoCs

pid	Process
12852	Skcsk.exe
14984	Skcsk.exe

Loads dropped DLL 1 IoCs

pid	Process
12852	Skcsk.exe

Enumerates connected drives 3 TTPs 22 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\I:	Skcsk.exe
File opened (read-only)	\??\K:	Skcsk.exe
File opened (read-only)	\??\Q:	Skcsk.exe
File opened (read-only)	\??\V:	Skcsk.exe
File opened (read-only)	\??\Z:	Skcsk.exe
File opened (read-only)	\??\H:	Skcsk.exe
File opened (read-only)	\??\L:	Skcsk.exe
File opened (read-only)	\??\M:	Skcsk.exe
File opened (read-only)	\??\N:	Skcsk.exe
File opened (read-only)	\??\X:	Skcsk.exe
File opened (read-only)	\??\E:	Skcsk.exe
File opened (read-only)	\??\J:	Skcsk.exe
File opened (read-only)	\??\P:	Skcsk.exe
File opened (read-only)	\??\Y:	Skcsk.exe
File opened (read-only)	\??\U:	Skcsk.exe
File opened (read-only)	\??\W:	Skcsk.exe
File opened (read-only)	\??\B:	Skcsk.exe
File opened (read-only)	\??\G:	Skcsk.exe
File opened (read-only)	\??\O:	Skcsk.exe
File opened (read-only)	\??\R:	Skcsk.exe
File opened (read-only)	\??\S:	Skcsk.exe
File opened (read-only)	\??\T:	Skcsk.exe

Drops file in System32 directory 2 IoCs

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

Suspicious use of NtSetInformationThreadHideFromDebugger 40 IoCs

pid	Process
2276	SoftUpdate.exe
2276	SoftUpdate.exe
2276	SoftUpdate.exe
12852	Skcsk.exe
2276	SoftUpdate.exe
12852	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SoftUpdate.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
14976	cmd.exe
15036	PING.EXE

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Skcsk.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	Skcsk.exe

Modifies data under HKEY_USERS 12 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\ActiveMovie\devenum	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	Skcsk.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	Skcsk.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\ActiveMovie	Skcsk.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\ActiveMovie\devenum\Version = "7"	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	Skcsk.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	Skcsk.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
15036	PING.EXE

Suspicious behavior: EnumeratesProcesses 35 IoCs

pid	Process
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe
14984	Skcsk.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2276	SoftUpdate.exe
Token: 33	14984	Skcsk.exe
Token: SeIncBasePriorityPrivilege	14984	Skcsk.exe
Token: 33	14984	Skcsk.exe
Token: SeIncBasePriorityPrivilege	14984	Skcsk.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2276 wrote to memory of 14976	2276	SoftUpdate.exe	31
PID 2276 wrote to memory of 14976	2276	SoftUpdate.exe	31
PID 2276 wrote to memory of 14976	2276	SoftUpdate.exe	31
PID 2276 wrote to memory of 14976	2276	SoftUpdate.exe	31
PID 2276 wrote to memory of 14976	2276	SoftUpdate.exe	31
PID 2276 wrote to memory of 14976	2276	SoftUpdate.exe	31
PID 2276 wrote to memory of 14976	2276	SoftUpdate.exe	31
PID 12852 wrote to memory of 14984	12852	Skcsk.exe	32
PID 12852 wrote to memory of 14984	12852	Skcsk.exe	32
PID 12852 wrote to memory of 14984	12852	Skcsk.exe	32
PID 12852 wrote to memory of 14984	12852	Skcsk.exe	32
PID 14976 wrote to memory of 15036	14976	cmd.exe	34
PID 14976 wrote to memory of 15036	14976	cmd.exe	34
PID 14976 wrote to memory of 15036	14976	cmd.exe	34
PID 14976 wrote to memory of 15036	14976	cmd.exe	34
PID 14976 wrote to memory of 15036	14976	cmd.exe	34
PID 14976 wrote to memory of 15036	14976	cmd.exe	34
PID 14976 wrote to memory of 15036	14976	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\SoftUpdate.exe
"C:\Users\Admin\AppData\Local\Temp\SoftUpdate.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2276
- 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\SOFTUP~1.EXE > nul
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:14976
- - 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:15036

C:\Windows\SysWOW64\Skcsk.exe
C:\Windows\SysWOW64\Skcsk.exe -auto
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:12852
- C:\Windows\SysWOW64\Skcsk.exe
  C:\Windows\SysWOW64\Skcsk.exe -acsi
  2⤵
  - Executes dropped EXE
  - Enumerates connected drives
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Modifies data under HKEY_USERS
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:14984

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\Skcsk.exe

Filesize
27.6MB

MD5
be076ac2e070b1c8c49f57fe79f06aea

SHA1
10c9f353e157a3017f5482375f58ace03145625f

SHA256
e629bc8537e7d2eac57fb30ad012aa611bfb24d25dd9f3ee1e0dcade5de3e4b8

SHA512
d04b05587ba8ab19bfbb13ed071886fe1d4f44a96e17f2f92b91859593e67c0d35583649b5eb0cd4b9cbaffc596a0cabdec46d6bbc2babc2b71b4ecbcef99347

Download Submit
memory/2276-868-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-1-0x0000000002550000-0x00000000040DC000-memory.dmp

Filesize
27.5MB

Download
memory/2276-813-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-866-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-818-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-816-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-814-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-811-0x0000000002550000-0x00000000040DC000-memory.dmp

Filesize
27.5MB

Download
memory/2276-2-0x0000000075220000-0x0000000075267000-memory.dmp

Filesize
284KB

Download
memory/2276-824-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-832-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-852-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-826-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-848-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-874-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-872-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-871-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-0-0x0000000000400000-0x0000000001F8C000-memory.dmp

Filesize
27.5MB

Download
memory/2276-820-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-822-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-860-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-862-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-858-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-856-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-854-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-850-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-846-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-844-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-842-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-840-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-838-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-836-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-834-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-830-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-828-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-864-0x0000000004300000-0x0000000004411000-memory.dmp

Filesize
1.1MB

Download
memory/2276-17402-0x0000000000400000-0x0000000001F8C000-memory.dmp

Filesize
27.5MB

Download