gh0strat | 6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d

General

Target

6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
Size

104KB
MD5

c55df3ccf34d0c3d4d900d8a8f6a88c0
SHA1

50859414fa92a09c2df73151d913269f1bfe01f8
SHA256

6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d
SHA512

9f1fa0d525d8b6075fd79f3dc0eb0d91b017394f3cc74aec5c3fbc2d709521223eeff904ab1c11cdb9fbbb8db43d808fe73de2202b6c019326dae21c349908d5
SSDEEP

1536:4H3ccHYvlcaFUdw9Teh/+2wX9yB5aW2SXZH:H9caJBeJGw5fLpH

Score

10^/10

gh0strat purplefox evasion persistence rat rootkit trojan

Malware Config

Signatures

Detect PurpleFox Rootkit 6 IoCs

Detect PurpleFox Rootkit.

rootkit

Processes:

resource	yara_rule
behavioral2/memory/4812-132-0x0000000002D90000-0x0000000002F36000-memory.dmp	purplefox_rootkit
behavioral2/memory/4812-137-0x0000000002C50000-0x0000000002D89000-memory.dmp	purplefox_rootkit
behavioral2/memory/4812-138-0x0000000002D90000-0x0000000002F36000-memory.dmp	purplefox_rootkit
behavioral2/memory/4252-144-0x0000000002340000-0x00000000024E6000-memory.dmp	purplefox_rootkit
behavioral2/memory/4252-147-0x0000000002340000-0x00000000024E6000-memory.dmp	purplefox_rootkit
behavioral2/memory/4252-151-0x0000000002340000-0x00000000024E6000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 6 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4812-132-0x0000000002D90000-0x0000000002F36000-memory.dmp	family_gh0strat
behavioral2/memory/4812-137-0x0000000002C50000-0x0000000002D89000-memory.dmp	family_gh0strat
behavioral2/memory/4812-138-0x0000000002D90000-0x0000000002F36000-memory.dmp	family_gh0strat
behavioral2/memory/4252-144-0x0000000002340000-0x00000000024E6000-memory.dmp	family_gh0strat
behavioral2/memory/4252-147-0x0000000002340000-0x00000000024E6000-memory.dmp	family_gh0strat
behavioral2/memory/4252-151-0x0000000002340000-0x00000000024E6000-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
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

windows.exe

pid process

4252 windows.exe
Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

4488 attrib.exe
2028 attrib.exe

pid	process
4252	windows.exe

pid	process
4488	attrib.exe
2028	attrib.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:

windows.exe6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	windows.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

windows.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Window°²È«·À»¤ÖÐÐÄÄ£¿é = "C:\\ProgramData\\Micros\\svchost.exe"	windows.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:

windows.exe

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

Drops file in Program Files directory 1 IoCs

Processes:

attrib.exe

description ioc process

File opened for modification C:\PROGRA~3\windows.exe attrib.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 opened for modification	C:\PROGRA~3\windows.exe	attrib.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:

windows.exe

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

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exewindows.exe

pid	process
4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe
4252	windows.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exewindows.exe

description	pid	process
Token: SeIncBasePriorityPrivilege	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
Token: SeIncBasePriorityPrivilege	4252	windows.exe
Token: 33	4252	windows.exe
Token: SeIncBasePriorityPrivilege	4252	windows.exe
Token: 33	4252	windows.exe
Token: SeIncBasePriorityPrivilege	4252	windows.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exewindows.exe

pid process

4812 6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
4252 windows.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.execmd.exewindows.execmd.exe

description	pid	process	target process
PID 4812 wrote to memory of 3424	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	cmd.exe
PID 4812 wrote to memory of 3424	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	cmd.exe
PID 4812 wrote to memory of 3424	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	cmd.exe
PID 4812 wrote to memory of 3320	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	cmd.exe
PID 4812 wrote to memory of 3320	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	cmd.exe
PID 4812 wrote to memory of 3320	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	cmd.exe
PID 4812 wrote to memory of 3544	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	cmd.exe
PID 4812 wrote to memory of 3544	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	cmd.exe
PID 4812 wrote to memory of 3544	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	cmd.exe
PID 3424 wrote to memory of 4488	3424	cmd.exe	attrib.exe
PID 3424 wrote to memory of 4488	3424	cmd.exe	attrib.exe
PID 3424 wrote to memory of 4488	3424	cmd.exe	attrib.exe
PID 4812 wrote to memory of 4252	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	windows.exe
PID 4812 wrote to memory of 4252	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	windows.exe
PID 4812 wrote to memory of 4252	4812	6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe	windows.exe
PID 4252 wrote to memory of 1116	4252	windows.exe	cmd.exe
PID 4252 wrote to memory of 1116	4252	windows.exe	cmd.exe
PID 4252 wrote to memory of 1116	4252	windows.exe	cmd.exe
PID 1116 wrote to memory of 2028	1116	cmd.exe	attrib.exe
PID 1116 wrote to memory of 2028	1116	cmd.exe	attrib.exe
PID 1116 wrote to memory of 2028	1116	cmd.exe	attrib.exe
PID 4252 wrote to memory of 3380	4252	windows.exe	cmd.exe
PID 4252 wrote to memory of 3380	4252	windows.exe	cmd.exe
PID 4252 wrote to memory of 3380	4252	windows.exe	cmd.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

4488 attrib.exe
2028 attrib.exe

pid	process
4488	attrib.exe
2028	attrib.exe

C:\Users\Admin\AppData\Local\Temp\6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe
"C:\Users\Admin\AppData\Local\Temp\6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4812

C:\Windows\SysWOW64\cmd.exe
cmd /c md C:\ProgramData\Micros
2⤵
PID:3544

C:\Windows\SysWOW64\cmd.exe
cmd /c md C:\ProgramData\Micros
2⤵
PID:3320

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c attrib C:\Users\Admin\AppData\Local\Temp\6655C4~1.EXE +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:3424

C:\Windows\SysWOW64\attrib.exe
attrib C:\Users\Admin\AppData\Local\Temp\6655C4~1.EXE +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:4488

C:\ProgramData\windows.exe
C:\ProgramData\windows.exe
2⤵
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4252

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c attrib C:\PROGRA~3\windows.exe +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:1116

C:\Windows\SysWOW64\attrib.exe
attrib C:\PROGRA~3\windows.exe +s +h
4⤵
- Sets file to hidden
- Drops file in Program Files directory
- Views/modifies file attributes
PID:2028

C:\Windows\SysWOW64\cmd.exe
cmd /c md C:\ProgramData\ru
3⤵
PID:3380

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

2

T1158

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

4

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\ProgramData\Micros\1.txt
Filesize
76KB

MD5
a0174e9945895fa8ace11f6bb4a64298

SHA1
527c4ebc005deb88f29edd83a23ac977735d76c4

SHA256
2dcd521895377ae3463dd61369c7fc6aafd8610e020592bf29b88888fc295ca0

SHA512
974f26161cc94c42fbe781db476562ccee90051f5c419ad156d4d17ab63231fa62a064c32cf1acc648e06d01d7f69e785f1421407859f2d78976d76a89b27dec

Download Submit
C:\ProgramData\Micros\2.txt
Filesize
44KB

MD5
fad8ce9ef436709815a1cec228cf2ceb

SHA1
397b2d26ede8e205b8b6b5d57d2234dc797e7680

SHA256
675fa1a3d7c443b8b8634e35351bdc96942b944ef1083b0a0347671d5e4bf28e

SHA512
66c2649b97f86b276030de64fedb3f110c59dd8cd6a9b76752fbef520fdcb87d60311ae44d647afac8b5bc0ccac6b9f22f1c27ada41cc0cc89e5106ea1223de4

Download Submit
C:\ProgramData\SHELL.TXT
Filesize
1.2MB

MD5
f8e4629ba915fda41e718cd3f0e249a5

SHA1
8c5c6b4bbfd56753316cef6d4720e4e8b092d485

SHA256
5893e1ba760d79477725daf1cd5bb5bdc7400a1c238cfb9b1ecc6b36b8d812d3

SHA512
2c4291e09feaa82928a2a509eb4120d01c711ce6c1b1cf9369c718d7bb2ff5fd4d2abf9ff153f6fabff4b279074ee5ca8d06eff8c2f42bb772fa19656eee7602

Download Submit
C:\ProgramData\SHELL.ini
Filesize
49B

MD5
fc40128d051467f662e0b1618e79d9bf

SHA1
2932bea9eac3be340fd61e83e4a19a57b00fc22a

SHA256
1d3b8f8845588676f44b33149fcfb06652c604aed65aff7eec0f51e52d93844b

SHA512
9542a9a6a9e67951f420057eaf3f95d86773dec9e6c9249d4282f75aea24c43429e2c153aab393177e731ac575a25d7b82eb74b1b5adaa979db43c21de941c15

Download Submit
C:\ProgramData\windows.exe
Filesize
104KB

MD5
c55df3ccf34d0c3d4d900d8a8f6a88c0

SHA1
50859414fa92a09c2df73151d913269f1bfe01f8

SHA256
6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d

SHA512
9f1fa0d525d8b6075fd79f3dc0eb0d91b017394f3cc74aec5c3fbc2d709521223eeff904ab1c11cdb9fbbb8db43d808fe73de2202b6c019326dae21c349908d5

Download Submit
C:\ProgramData\windows.exe
Filesize
104KB

MD5
c55df3ccf34d0c3d4d900d8a8f6a88c0

SHA1
50859414fa92a09c2df73151d913269f1bfe01f8

SHA256
6655c46137af5c739e95a0f356efda3a471336d03cff18d8bc2edfd063d76a3d

SHA512
9f1fa0d525d8b6075fd79f3dc0eb0d91b017394f3cc74aec5c3fbc2d709521223eeff904ab1c11cdb9fbbb8db43d808fe73de2202b6c019326dae21c349908d5

Download Submit
memory/1116-145-0x0000000000000000-mapping.dmp

Download
memory/2028-146-0x0000000000000000-mapping.dmp

Download
memory/3320-134-0x0000000000000000-mapping.dmp

Download
memory/3380-148-0x0000000000000000-mapping.dmp

Download
memory/3424-133-0x0000000000000000-mapping.dmp

Download
memory/3544-135-0x0000000000000000-mapping.dmp

Download
memory/4252-147-0x0000000002340000-0x00000000024E6000-memory.dmp

Filesize
1.6MB

Download
memory/4252-144-0x0000000002340000-0x00000000024E6000-memory.dmp

Filesize
1.6MB

Download
memory/4252-139-0x0000000000000000-mapping.dmp

Download
memory/4252-151-0x0000000002340000-0x00000000024E6000-memory.dmp

Filesize
1.6MB

Download
memory/4488-136-0x0000000000000000-mapping.dmp

Download
memory/4812-132-0x0000000002D90000-0x0000000002F36000-memory.dmp

Filesize
1.6MB

Download
memory/4812-138-0x0000000002D90000-0x0000000002F36000-memory.dmp

Filesize
1.6MB

Download
memory/4812-137-0x0000000002C50000-0x0000000002D89000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads