Analysis Overview
SHA256
acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15
Threat Level: Known bad
The file acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15 was found to be: Known bad.
Malicious Activity Summary
Gh0strat
Detect PurpleFox Rootkit
Gh0st RAT payload
PurpleFox
Drops file in Drivers directory
Sets service image path in registry
Loads dropped DLL
Deletes itself
Executes dropped EXE
Drops file in System32 directory
Unsigned PE
Suspicious use of WriteProcessMemory
Runs ping.exe
Suspicious behavior: LoadsDriver
Suspicious use of AdjustPrivilegeToken
Modifies data under HKEY_USERS
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-06-21 14:46
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-21 14:46
Reported
2024-06-21 14:49
Platform
win7-20240508-en
Max time kernel
145s
Max time network
149s
Command Line
Signatures
Detect PurpleFox Rootkit
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Gh0st RAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Gh0strat
PurpleFox
Drops file in Drivers directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\drivers\QAssist.sys | C:\Windows\SysWOW64\sainbox.exe | N/A |
Sets service image path in registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\QAssist\ImagePath = "system32\\DRIVERS\\QAssist.sys" | C:\Windows\SysWOW64\sainbox.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\sainbox.exe | C:\Users\Admin\AppData\Local\Temp\acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\sainbox.exe | C:\Users\Admin\AppData\Local\Temp\acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15.exe | N/A |
Modifies data under HKEY_USERS
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Set value (str) | \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Set value (str) | \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Set value (str) | \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" | C:\Windows\SysWOW64\sainbox.exe | N/A |
Runs ping.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\PING.EXE | N/A |
Suspicious behavior: LoadsDriver
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15.exe | N/A |
| Token: SeLoadDriverPrivilege | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Token: 33 | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Token: 33 | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15.exe
"C:\Users\Admin\AppData\Local\Temp\acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15.exe"
C:\Windows\SysWOW64\sainbox.exe
C:\Windows\SysWOW64\sainbox.exe -auto
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\ACB4BF~1.EXE > nul
C:\Windows\SysWOW64\sainbox.exe
C:\Windows\SysWOW64\sainbox.exe -acsi
C:\Windows\SysWOW64\PING.EXE
ping -n 2 127.0.0.1
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 090909896f78.e1.luyouxia.net | udp |
| CN | 123.99.198.201:20771 | 090909896f78.e1.luyouxia.net | tcp |
| CN | 123.99.198.201:20771 | 090909896f78.e1.luyouxia.net | tcp |
| CN | 123.99.198.201:20771 | 090909896f78.e1.luyouxia.net | tcp |
| CN | 123.99.198.201:20771 | 090909896f78.e1.luyouxia.net | tcp |
| CN | 123.99.198.201:20771 | 090909896f78.e1.luyouxia.net | tcp |
| CN | 123.99.198.201:20771 | 090909896f78.e1.luyouxia.net | tcp |
| CN | 123.99.198.201:20771 | 090909896f78.e1.luyouxia.net | tcp |
Files
memory/2920-0-0x0000000010000000-0x000000001019F000-memory.dmp
C:\Windows\SysWOW64\sainbox.exe
| MD5 | 4cf11cd62b2be8f9bb681ae76d9b65a5 |
| SHA1 | 496df316d577b48df72706b529acbd25fa451f26 |
| SHA256 | acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15 |
| SHA512 | e44121ae617d03e2b72b142c2023152d15a11be2cd587fd1924ddba2eb26a86dab8fe82a874a244e5e3d7d9becf29d613a598c74cf753aa4f788d526872da5a7 |
memory/2368-18-0x0000000010000000-0x000000001019F000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-21 14:46
Reported
2024-06-21 14:49
Platform
win10v2004-20240508-en
Max time kernel
142s
Max time network
148s
Command Line
Signatures
Detect PurpleFox Rootkit
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Gh0st RAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Gh0strat
PurpleFox
Drops file in Drivers directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\drivers\QAssist.sys | C:\Windows\SysWOW64\sainbox.exe | N/A |
Sets service image path in registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\QAssist\ImagePath = "system32\\DRIVERS\\QAssist.sys" | C:\Windows\SysWOW64\sainbox.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\sainbox.exe | C:\Users\Admin\AppData\Local\Temp\acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\sainbox.exe | C:\Users\Admin\AppData\Local\Temp\acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15.exe | N/A |
Modifies data under HKEY_USERS
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Set value (str) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Set value (str) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" | C:\Windows\SysWOW64\sainbox.exe | N/A |
Runs ping.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\PING.EXE | N/A |
Suspicious behavior: LoadsDriver
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15.exe | N/A |
| Token: SeLoadDriverPrivilege | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Token: 33 | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Token: 33 | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\SysWOW64\sainbox.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15.exe
"C:\Users\Admin\AppData\Local\Temp\acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15.exe"
C:\Windows\SysWOW64\sainbox.exe
C:\Windows\SysWOW64\sainbox.exe -auto
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\ACB4BF~1.EXE > nul
C:\Windows\SysWOW64\sainbox.exe
C:\Windows\SysWOW64\sainbox.exe -acsi
C:\Windows\SysWOW64\PING.EXE
ping -n 2 127.0.0.1
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 090909896f78.e1.luyouxia.net | udp |
| US | 8.8.8.8:53 | 090909896f78.e1.luyouxia.net | udp |
| US | 8.8.8.8:53 | 090909896f78.e1.luyouxia.net | udp |
| US | 8.8.8.8:53 | 090909896f78.e1.luyouxia.net | udp |
| US | 8.8.8.8:53 | 090909896f78.e1.luyouxia.net | udp |
| US | 8.8.8.8:53 | 090909896f78.e1.luyouxia.net | udp |
| US | 8.8.8.8:53 | 090909896f78.e1.luyouxia.net | udp |
| US | 8.8.8.8:53 | 090909896f78.e1.luyouxia.net | udp |
| US | 8.8.8.8:53 | 090909896f78.e1.luyouxia.net | udp |
| US | 8.8.8.8:53 | 090909896f78.e1.luyouxia.net | udp |
Files
memory/1680-1-0x0000000010000000-0x000000001019F000-memory.dmp
C:\Windows\SysWOW64\sainbox.exe
| MD5 | 4cf11cd62b2be8f9bb681ae76d9b65a5 |
| SHA1 | 496df316d577b48df72706b529acbd25fa451f26 |
| SHA256 | acb4bf9264539e3e3a34c5c6e3e6f15f57b210ef2fd83fdfb9a603e93c6b1e15 |
| SHA512 | e44121ae617d03e2b72b142c2023152d15a11be2cd587fd1924ddba2eb26a86dab8fe82a874a244e5e3d7d9becf29d613a598c74cf753aa4f788d526872da5a7 |
memory/1500-10-0x0000000010000000-0x000000001019F000-memory.dmp
memory/3320-17-0x0000000010000000-0x000000001019F000-memory.dmp