gh0strat | a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d

General

Target

a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d.exe
Size

611KB
MD5

4b70b4cd045acdee4c9959013036ee32
SHA1

6f5e5a679bc4ced024748085407f9bcfe7b660af
SHA256

a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d
SHA512

48653ce0a52694f57179c15d08cf1597d9a1ebaa27770ffaee7cffe895e00c7b8514363fc1ef561a57696bcf1a134fd2bc64f115a284c0ec90cb0af09ab4ed72
SSDEEP

12288:dFpuzZSkcBNrl5mTEUkDaSdJfpSaoNRVBUyMCe8VMM80B7qrI3iK1XBwZQB:dFmShDrngEUkDaiJfpSaoNRpMCe8CM82

Score

10^/10

gh0strat purplefox discovery persistence rat rootkit trojan upx

Malware Config

Signatures

Detect PurpleFox Rootkit 6 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral1/memory/2372-1-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral1/memory/2372-20-0x0000000000400000-0x0000000000585000-memory.dmp	purplefox_rootkit
behavioral1/memory/2540-19-0x0000000001210000-0x0000000001395000-memory.dmp	purplefox_rootkit
behavioral1/memory/2540-22-0x0000000000400000-0x0000000000585000-memory.dmp	purplefox_rootkit
behavioral1/memory/2356-24-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral1/memory/2356-30-0x0000000000400000-0x0000000000585000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 6 IoCs

resource	yara_rule
behavioral1/memory/2372-1-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral1/memory/2372-20-0x0000000000400000-0x0000000000585000-memory.dmp	family_gh0strat
behavioral1/memory/2540-19-0x0000000001210000-0x0000000001395000-memory.dmp	family_gh0strat
behavioral1/memory/2540-22-0x0000000000400000-0x0000000000585000-memory.dmp	family_gh0strat
behavioral1/memory/2356-24-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral1/memory/2356-30-0x0000000000400000-0x0000000000585000-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	Vnfvn.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"	Vnfvn.exe

Deletes itself 1 IoCs

pid	Process
2352	cmd.exe

Executes dropped EXE 2 IoCs

pid	Process
2540	Vnfvn.exe
2356	Vnfvn.exe

Loads dropped DLL 1 IoCs

pid	Process
2540	Vnfvn.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)	\??\W:	Vnfvn.exe
File opened (read-only)	\??\B:	Vnfvn.exe
File opened (read-only)	\??\G:	Vnfvn.exe
File opened (read-only)	\??\J:	Vnfvn.exe
File opened (read-only)	\??\N:	Vnfvn.exe
File opened (read-only)	\??\Q:	Vnfvn.exe
File opened (read-only)	\??\Z:	Vnfvn.exe
File opened (read-only)	\??\H:	Vnfvn.exe
File opened (read-only)	\??\K:	Vnfvn.exe
File opened (read-only)	\??\L:	Vnfvn.exe
File opened (read-only)	\??\M:	Vnfvn.exe
File opened (read-only)	\??\O:	Vnfvn.exe
File opened (read-only)	\??\R:	Vnfvn.exe
File opened (read-only)	\??\S:	Vnfvn.exe
File opened (read-only)	\??\V:	Vnfvn.exe
File opened (read-only)	\??\Y:	Vnfvn.exe
File opened (read-only)	\??\E:	Vnfvn.exe
File opened (read-only)	\??\I:	Vnfvn.exe
File opened (read-only)	\??\P:	Vnfvn.exe
File opened (read-only)	\??\T:	Vnfvn.exe
File opened (read-only)	\??\U:	Vnfvn.exe
File opened (read-only)	\??\X:	Vnfvn.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Vnfvn.exe	a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d.exe
File opened for modification	C:\Windows\SysWOW64\Vnfvn.exe	a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2372-0-0x0000000000400000-0x0000000000585000-memory.dmp	upx
behavioral1/files/0x000a00000001202c-9.dat	upx
behavioral1/memory/2372-20-0x0000000000400000-0x0000000000585000-memory.dmp	upx
behavioral1/memory/2540-22-0x0000000000400000-0x0000000000585000-memory.dmp	upx
behavioral1/memory/2356-30-0x0000000000400000-0x0000000000585000-memory.dmp	upx

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	a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Vnfvn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Vnfvn.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
2352	cmd.exe
2832	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	Vnfvn.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	Vnfvn.exe

Modifies data under HKEY_USERS 12 IoCs

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

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2832	PING.EXE

Suspicious behavior: EnumeratesProcesses 33 IoCs

pid	Process
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe
2356	Vnfvn.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
2356	Vnfvn.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2372	a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d.exe
Token: SeLoadDriverPrivilege	2356	Vnfvn.exe
Token: 33	2356	Vnfvn.exe
Token: SeIncBasePriorityPrivilege	2356	Vnfvn.exe
Token: 33	2356	Vnfvn.exe
Token: SeIncBasePriorityPrivilege	2356	Vnfvn.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 2352	2372	a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d.exe	31
PID 2372 wrote to memory of 2352	2372	a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d.exe	31
PID 2372 wrote to memory of 2352	2372	a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d.exe	31
PID 2372 wrote to memory of 2352	2372	a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d.exe	31
PID 2540 wrote to memory of 2356	2540	Vnfvn.exe	32
PID 2540 wrote to memory of 2356	2540	Vnfvn.exe	32
PID 2540 wrote to memory of 2356	2540	Vnfvn.exe	32
PID 2540 wrote to memory of 2356	2540	Vnfvn.exe	32
PID 2352 wrote to memory of 2832	2352	cmd.exe	34
PID 2352 wrote to memory of 2832	2352	cmd.exe	34
PID 2352 wrote to memory of 2832	2352	cmd.exe	34
PID 2352 wrote to memory of 2832	2352	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d.exe
"C:\Users\Admin\AppData\Local\Temp\a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2372
- 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\A4BAE2~1.EXE > nul
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2352
- - 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:2832

C:\Windows\SysWOW64\Vnfvn.exe
C:\Windows\SysWOW64\Vnfvn.exe -auto
1⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Windows\SysWOW64\Vnfvn.exe
  C:\Windows\SysWOW64\Vnfvn.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:2356

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

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\SysWOW64\Vnfvn.exe

Filesize
611KB

MD5
4b70b4cd045acdee4c9959013036ee32

SHA1
6f5e5a679bc4ced024748085407f9bcfe7b660af

SHA256
a4bae239a0bf4e869961e1a97e311ab37909cdf0f71bbfebc9d7887eb636d75d

SHA512
48653ce0a52694f57179c15d08cf1597d9a1ebaa27770ffaee7cffe895e00c7b8514363fc1ef561a57696bcf1a134fd2bc64f115a284c0ec90cb0af09ab4ed72

Download Submit
memory/2356-24-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/2356-30-0x0000000000400000-0x0000000000585000-memory.dmp

Filesize
1.5MB

Download
memory/2372-0-0x0000000000400000-0x0000000000585000-memory.dmp

Filesize
1.5MB

Download
memory/2372-1-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/2372-20-0x0000000000400000-0x0000000000585000-memory.dmp

Filesize
1.5MB

Download
memory/2540-19-0x0000000001210000-0x0000000001395000-memory.dmp

Filesize
1.5MB

Download
memory/2540-22-0x0000000000400000-0x0000000000585000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads