gh0strat | bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758

Analysis

max time kernel
133s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
30-08-2024 08:46

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General

Target

bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758.exe
Size

1.4MB
MD5

17d6005210c6f1aa227ad335c1f9bc5a
SHA1

6bcf515221fa800399f2128be4f539ba99dcedf4
SHA256

bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758
SHA512

a4449c841a1fb0b3761afb68a8f55a8554bd55dc4607afe19ad8746704353936964be3c62453a26529035bccd76b0b216d4134a8d2026676eb619b02ac3566d4
SSDEEP

24576:F39WaOyHutimZ9VSly2hVvHW6qMnSbTBBhBMN:598HPkVOBTK

Score

10^/10

gh0strat purplefox discovery persistence rat rootkit trojan

Malware Config

Signatures

Detect PurpleFox Rootkit 3 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral2/memory/1776-0-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/2028-11-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/3132-17-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/1776-0-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/2028-11-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/3132-17-0x0000000010000000-0x000000001019F000-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	Stlmn.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"	Stlmn.exe

Executes dropped EXE 2 IoCs

pid	Process
2028	Stlmn.exe
3132	Stlmn.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)	\??\Z:	Stlmn.exe
File opened (read-only)	\??\B:	Stlmn.exe
File opened (read-only)	\??\G:	Stlmn.exe
File opened (read-only)	\??\N:	Stlmn.exe
File opened (read-only)	\??\Q:	Stlmn.exe
File opened (read-only)	\??\R:	Stlmn.exe
File opened (read-only)	\??\T:	Stlmn.exe
File opened (read-only)	\??\X:	Stlmn.exe
File opened (read-only)	\??\I:	Stlmn.exe
File opened (read-only)	\??\K:	Stlmn.exe
File opened (read-only)	\??\M:	Stlmn.exe
File opened (read-only)	\??\O:	Stlmn.exe
File opened (read-only)	\??\H:	Stlmn.exe
File opened (read-only)	\??\J:	Stlmn.exe
File opened (read-only)	\??\L:	Stlmn.exe
File opened (read-only)	\??\S:	Stlmn.exe
File opened (read-only)	\??\V:	Stlmn.exe
File opened (read-only)	\??\Y:	Stlmn.exe
File opened (read-only)	\??\E:	Stlmn.exe
File opened (read-only)	\??\P:	Stlmn.exe
File opened (read-only)	\??\U:	Stlmn.exe
File opened (read-only)	\??\W:	Stlmn.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Stlmn.exe	bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758.exe
File opened for modification	C:\Windows\SysWOW64\Stlmn.exe	bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758.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	bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Stlmn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Stlmn.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
3748	cmd.exe
4296	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	Stlmn.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	Stlmn.exe

Modifies data under HKEY_USERS 5 IoCs

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

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4296	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe
3132	Stlmn.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
3132	Stlmn.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1776	bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758.exe
Token: SeLoadDriverPrivilege	3132	Stlmn.exe
Token: 33	3132	Stlmn.exe
Token: SeIncBasePriorityPrivilege	3132	Stlmn.exe
Token: 33	3132	Stlmn.exe
Token: SeIncBasePriorityPrivilege	3132	Stlmn.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1776 wrote to memory of 3748	1776	bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758.exe	85
PID 1776 wrote to memory of 3748	1776	bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758.exe	85
PID 1776 wrote to memory of 3748	1776	bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758.exe	85
PID 2028 wrote to memory of 3132	2028	Stlmn.exe	86
PID 2028 wrote to memory of 3132	2028	Stlmn.exe	86
PID 2028 wrote to memory of 3132	2028	Stlmn.exe	86
PID 3748 wrote to memory of 4296	3748	cmd.exe	88
PID 3748 wrote to memory of 4296	3748	cmd.exe	88
PID 3748 wrote to memory of 4296	3748	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758.exe
"C:\Users\Admin\AppData\Local\Temp\bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1776
- 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\BBA6A9~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3748
- - 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:4296

C:\Windows\SysWOW64\Stlmn.exe
C:\Windows\SysWOW64\Stlmn.exe -auto
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Windows\SysWOW64\Stlmn.exe
  C:\Windows\SysWOW64\Stlmn.exe -acsi
  2⤵
  - Drops file in Drivers directory
  - Sets service image path in registry
  - Executes dropped EXE
  - Enumerates connected drives
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Modifies data under HKEY_USERS
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  PID:3132

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

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

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Downloads

C:\Windows\SysWOW64\Stlmn.exe

Filesize
1.4MB

MD5
17d6005210c6f1aa227ad335c1f9bc5a

SHA1
6bcf515221fa800399f2128be4f539ba99dcedf4

SHA256
bba6a9f67d0f2acaf56fe23f57fb25fc69b5e5c60c055c270ebe37132b2c0758

SHA512
a4449c841a1fb0b3761afb68a8f55a8554bd55dc4607afe19ad8746704353936964be3c62453a26529035bccd76b0b216d4134a8d2026676eb619b02ac3566d4

Download Submit
memory/1776-0-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/2028-11-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/3132-17-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download