gh0strat | 6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa

Analysis

max time kernel
19s
max time network
63s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
06-12-2022 08:55

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General

Target

6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe
Size

5.9MB
MD5

32b5d810d53f87579985106a8e51d3ee
SHA1

adb3818622e47920d56f97bf01c34d616c0da989
SHA256

6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa
SHA512

61fd5e3d08bb1189451ac8530cc31db174a1cf019660e6f9a52d25dd626898c0216d612b7d914313fcd0da0feb791f3db8e4ecadd1e55ada821e0a82e024da11
SSDEEP

98304:I4uTo0ZeXgtCs0ItubSsLUYl5ahDynBhSpeRdJWBRcRE4q0Y:I4em0tuWBy02nqeVWXcs

Score

10^/10

gh0strat purplefox persistence rat rootkit trojan

Malware Config

Signatures

Detect PurpleFox Rootkit 3 IoCs

Detect PurpleFox Rootkit.

rootkit

Processes:

resource	yara_rule
behavioral2/memory/3896-154-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/3488-162-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/3708-171-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3896-154-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/3488-162-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/3708-171-0x0000000010000000-0x000000001019F000-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

Processes:

Sklme.exe

description ioc process

File created C:\Windows\system32\drivers\QAssist.sys Sklme.exe
Executes dropped EXE 5 IoCs

Processes:

¼Ó1.exeHMCL-3.3.180.exe23666.exeSklme.exeSklme.exe

pid process

4092 ¼Ó1.exe
4688 HMCL-3.3.180.exe
3896 23666.exe
3488 Sklme.exe
3708 Sklme.exe
Sets service image path in registry 2 TTPs 1 IoCs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Processes:

Sklme.exe

description ioc process

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

description	ioc	process
File created	C:\Windows\system32\drivers\QAssist.sys	Sklme.exe

pid	process
4092	¼Ó1.exe
4688	HMCL-3.3.180.exe
3896	23666.exe
3488	Sklme.exe
3708	Sklme.exe

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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe¼Ó1.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	¼Ó1.exe

Enumerates connected drives 3 TTPs 23 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

Processes:

Sklme.exe

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

Drops file in System32 directory 2 IoCs

Processes:

23666.exe

description ioc process

File created C:\Windows\SysWOW64\Sklme.exe 23666.exe
File opened for modification C:\Windows\SysWOW64\Sklme.exe 23666.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

¼Ó1.exe

pid process

4092 ¼Ó1.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File created	C:\Windows\SysWOW64\Sklme.exe	23666.exe
File opened for modification	C:\Windows\SysWOW64\Sklme.exe	23666.exe

pid	process
4092	¼Ó1.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

Processes:

Sklme.exe

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

Modifies data under HKEY_USERS 5 IoCs

Processes:

Sklme.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	Sklme.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie	Sklme.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum\Version = "7"	Sklme.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum	Sklme.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	Sklme.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

2340 PING.EXE

pid	process
2340	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Sklme.exe

pid	process
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe
3708	Sklme.exe

Suspicious behavior: LoadsDriver 1 IoCs

Processes:

Sklme.exe

pid process

3708 Sklme.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

23666.exeSklme.exe

description pid process

Token: SeIncBasePriorityPrivilege 3896 23666.exe
Token: SeLoadDriverPrivilege 3708 Sklme.exe

description	pid	process
Token: SeIncBasePriorityPrivilege	3896	23666.exe
Token: SeLoadDriverPrivilege	3708	Sklme.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe¼Ó1.exe

pid	process
4928	6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe
4928	6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe
4092	¼Ó1.exe
4092	¼Ó1.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exeHMCL-3.3.180.exe¼Ó1.exe23666.exeSklme.exe

description	pid	process	target process
PID 4928 wrote to memory of 4092	4928	6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe	¼Ó1.exe
PID 4928 wrote to memory of 4092	4928	6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe	¼Ó1.exe
PID 4928 wrote to memory of 4092	4928	6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe	¼Ó1.exe
PID 4928 wrote to memory of 4688	4928	6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe	HMCL-3.3.180.exe
PID 4928 wrote to memory of 4688	4928	6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe	HMCL-3.3.180.exe
PID 4928 wrote to memory of 4688	4928	6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe	HMCL-3.3.180.exe
PID 4688 wrote to memory of 1748	4688	HMCL-3.3.180.exe	javaw.exe
PID 4688 wrote to memory of 1748	4688	HMCL-3.3.180.exe	javaw.exe
PID 4092 wrote to memory of 3896	4092	¼Ó1.exe	23666.exe
PID 4092 wrote to memory of 3896	4092	¼Ó1.exe	23666.exe
PID 4092 wrote to memory of 3896	4092	¼Ó1.exe	23666.exe
PID 3896 wrote to memory of 2504	3896	23666.exe	cmd.exe
PID 3896 wrote to memory of 2504	3896	23666.exe	cmd.exe
PID 3896 wrote to memory of 2504	3896	23666.exe	cmd.exe
PID 3488 wrote to memory of 3708	3488	Sklme.exe	Sklme.exe
PID 3488 wrote to memory of 3708	3488	Sklme.exe	Sklme.exe
PID 3488 wrote to memory of 3708	3488	Sklme.exe	Sklme.exe

C:\Users\Admin\AppData\Local\Temp\6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe
"C:\Users\Admin\AppData\Local\Temp\6421213667f578589550be5d821ff9d67ab6bd851688fa9f8d01f9326640defa.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4928

C:\Users\Admin\AppData\Roaming\¼Ó1.exe
"C:\Users\Admin\AppData\Roaming\¼Ó1.exe"
2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4092

C:\Users\Admin\AppData\Local\Temp\23666.exe
"C:\Users\Admin\AppData\Local\Temp\23666.exe"
3⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3896

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\23666.exe > nul
4⤵
PID:2504

C:\Windows\SysWOW64\PING.EXE
ping -n 2 127.0.0.1
5⤵
- Runs ping.exe
PID:2340

C:\Users\Admin\AppData\Roaming\HMCL-3.3.180.exe
"C:\Users\Admin\AppData\Roaming\HMCL-3.3.180.exe"
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4688

C:\Program Files\Java\jdk1.8.0_66\bin\javaw.exe
"C:\Program Files\Java\jdk1.8.0_66\bin\javaw.exe" -XX:MinHeapFreeRatio=5 -XX:MaxHeapFreeRatio=15 -jar "C:\Users\Admin\AppData\Roaming\HMCL-3.3.180.exe"
3⤵
PID:1748

C:\Windows\SysWOW64\Sklme.exe
C:\Windows\SysWOW64\Sklme.exe -auto
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3488

C:\Windows\SysWOW64\Sklme.exe
C:\Windows\SysWOW64\Sklme.exe -acsi
2⤵
- Drops file in Drivers directory
- Executes dropped EXE
- Sets service image path in registry
- Enumerates connected drives
- Checks processor information in registry
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: LoadsDriver
- Suspicious use of AdjustPrivilegeToken
PID:3708

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Peripheral Device Discovery

T1120

Remote System Discovery

T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\23666.exe
Filesize
1.3MB

MD5
d06934e3b2d93ac67c39adef69f7a094

SHA1
3c55137848a51e20cbe7f04ec3045c0d3656b7d5

SHA256
c437aa78f3ff9baeb3ad981ab1f60a80e22a078fb1f4ccf7725b02fb40604fde

SHA512
b9219f772bdfa6378ba2bd724751f8a098fe2d3b2ec5d540c0d89f9be9bc1bba8aa001c379128b695def31267dc5ca04fbcbf30afcf259d101ca3a3fc9d5ac4b

Download Submit
C:\Users\Admin\AppData\Local\Temp\23666.exe
Filesize
1.3MB

MD5
d06934e3b2d93ac67c39adef69f7a094

SHA1
3c55137848a51e20cbe7f04ec3045c0d3656b7d5

SHA256
c437aa78f3ff9baeb3ad981ab1f60a80e22a078fb1f4ccf7725b02fb40604fde

SHA512
b9219f772bdfa6378ba2bd724751f8a098fe2d3b2ec5d540c0d89f9be9bc1bba8aa001c379128b695def31267dc5ca04fbcbf30afcf259d101ca3a3fc9d5ac4b

Download Submit
C:\Users\Admin\AppData\Roaming\HMCL-3.3.180.exe
Filesize
2.9MB

MD5
c368b71f5c632902d9db5d224529c6d1

SHA1
dad7ae3128253abbc917131c96e158ad1aba2b11

SHA256
33b81559da1c88239668499400638b6547a451eed2e45ad8cc6c60ef8fcd96ff

SHA512
910036c736ce984970a664801971a341f61410c135432827f40c8e560da58e6232d0a5e046f2a58753becb37f4ccf60333ad1b6bcfd4e7a398a557b928a7cec8

Download Submit
C:\Users\Admin\AppData\Roaming\HMCL-3.3.180.exe
Filesize
2.9MB

MD5
c368b71f5c632902d9db5d224529c6d1

SHA1
dad7ae3128253abbc917131c96e158ad1aba2b11

SHA256
33b81559da1c88239668499400638b6547a451eed2e45ad8cc6c60ef8fcd96ff

SHA512
910036c736ce984970a664801971a341f61410c135432827f40c8e560da58e6232d0a5e046f2a58753becb37f4ccf60333ad1b6bcfd4e7a398a557b928a7cec8

Download Submit
C:\Users\Admin\AppData\Roaming\¼Ó1.exe
Filesize
2.2MB

MD5
13008aa40eff08862d2a38db9601acb7

SHA1
9f8d24925b2d78df0f16f26a71372c425e058330

SHA256
395b6284ebb2fc43165a0f8c0fb3de015bcdf95dace9dbe12394024fdc404c17

SHA512
5b551a5270a8cb8e9dae312e284f3c3b4a6763e8f9c2fdedbdb2f5e7b952d8fc0f6ae9169228d13f4bced97c749ba026c443096fecd00f0c7be4f2d6ffe92a25

Download Submit
C:\Users\Admin\AppData\Roaming\¼Ó1.exe
Filesize
2.2MB

MD5
13008aa40eff08862d2a38db9601acb7

SHA1
9f8d24925b2d78df0f16f26a71372c425e058330

SHA256
395b6284ebb2fc43165a0f8c0fb3de015bcdf95dace9dbe12394024fdc404c17

SHA512
5b551a5270a8cb8e9dae312e284f3c3b4a6763e8f9c2fdedbdb2f5e7b952d8fc0f6ae9169228d13f4bced97c749ba026c443096fecd00f0c7be4f2d6ffe92a25

Download Submit
C:\Windows\SysWOW64\Sklme.exe
Filesize
1.3MB

MD5
d06934e3b2d93ac67c39adef69f7a094

SHA1
3c55137848a51e20cbe7f04ec3045c0d3656b7d5

SHA256
c437aa78f3ff9baeb3ad981ab1f60a80e22a078fb1f4ccf7725b02fb40604fde

SHA512
b9219f772bdfa6378ba2bd724751f8a098fe2d3b2ec5d540c0d89f9be9bc1bba8aa001c379128b695def31267dc5ca04fbcbf30afcf259d101ca3a3fc9d5ac4b

Download Submit
C:\Windows\SysWOW64\Sklme.exe
Filesize
1.3MB

MD5
d06934e3b2d93ac67c39adef69f7a094

SHA1
3c55137848a51e20cbe7f04ec3045c0d3656b7d5

SHA256
c437aa78f3ff9baeb3ad981ab1f60a80e22a078fb1f4ccf7725b02fb40604fde

SHA512
b9219f772bdfa6378ba2bd724751f8a098fe2d3b2ec5d540c0d89f9be9bc1bba8aa001c379128b695def31267dc5ca04fbcbf30afcf259d101ca3a3fc9d5ac4b

Download Submit
C:\Windows\SysWOW64\Sklme.exe
Filesize
1.3MB

MD5
d06934e3b2d93ac67c39adef69f7a094

SHA1
3c55137848a51e20cbe7f04ec3045c0d3656b7d5

SHA256
c437aa78f3ff9baeb3ad981ab1f60a80e22a078fb1f4ccf7725b02fb40604fde

SHA512
b9219f772bdfa6378ba2bd724751f8a098fe2d3b2ec5d540c0d89f9be9bc1bba8aa001c379128b695def31267dc5ca04fbcbf30afcf259d101ca3a3fc9d5ac4b

Download Submit
memory/1748-144-0x0000000002E90000-0x0000000003E90000-memory.dmp

Filesize
16.0MB

Download
memory/1748-215-0x0000000002E90000-0x0000000003E90000-memory.dmp

Filesize
16.0MB

Download
memory/1748-211-0x0000000002E90000-0x0000000003E90000-memory.dmp

Filesize
16.0MB

Download
memory/1748-202-0x0000000002E90000-0x0000000003E90000-memory.dmp

Filesize
16.0MB

Download
memory/1748-138-0x0000000000000000-mapping.dmp

Download
memory/1748-197-0x0000000002E90000-0x0000000003E90000-memory.dmp

Filesize
16.0MB

Download
memory/2340-199-0x0000000000000000-mapping.dmp

Download
memory/2504-168-0x0000000000000000-mapping.dmp

Download
memory/3488-162-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/3708-169-0x0000000000000000-mapping.dmp

Download
memory/3708-171-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/3896-150-0x0000000000000000-mapping.dmp

Download
memory/3896-154-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/4092-132-0x0000000000000000-mapping.dmp

Download
memory/4092-141-0x0000000000400000-0x00000000005BC000-memory.dmp

Filesize
1.7MB

Download
memory/4092-153-0x0000000000400000-0x00000000005BC000-memory.dmp

Filesize
1.7MB

Download
memory/4688-135-0x0000000000000000-mapping.dmp

Download