Analysis Overview
SHA256
5a6dfde115172be8d295c748b4a681aabc1e7c105267e84e552c0c24518764df
Threat Level: Known bad
The file TeamViewer_Setup.exe was found to be: Known bad.
Malicious Activity Summary
Vanilla Rat payload
Vanillarat family
VanillaRat
Vanilla Rat payload
Executes dropped EXE
Legitimate hosting services abused for malware hosting/C2
Adds Run key to start application
Drops file in Windows directory
Unsigned PE
Program crash
Enumerates physical storage devices
Modifies registry class
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Checks SCSI registry key(s)
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-07-09 14:36
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
2023-07-09 14:36
Reported
2023-07-09 14:39
Platform
win10-20230703-en
Max time kernel
150s
Max time network
132s
Command Line
Signatures
VanillaRat
Vanilla 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 |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\svchost.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-488886677-2269338296-1239465872-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe" | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Legitimate hosting services abused for malware hosting/C2
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\rescache\_merged\4183903823\810424605.pri | C:\Windows\system32\taskmgr.exe | N/A |
| File created | C:\Windows\rescache\_merged\1601268389\3877292338.pri | C:\Windows\system32\taskmgr.exe | N/A |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe |
Checks SCSI registry key(s)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A | C:\Windows\system32\taskmgr.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName | C:\Windows\system32\taskmgr.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-488886677-2269338296-1239465872-1000_Classes\Local Settings | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\taskmgr.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: SeDebugPrivilege | N/A | C:\Users\Admin\svchost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeSystemProfilePrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeCreateGlobalPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3708 wrote to memory of 4800 | N/A | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | C:\Users\Admin\svchost.exe |
| PID 3708 wrote to memory of 4800 | N/A | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | C:\Users\Admin\svchost.exe |
| PID 3708 wrote to memory of 4800 | N/A | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | C:\Users\Admin\svchost.exe |
| PID 4800 wrote to memory of 3236 | N/A | C:\Users\Admin\svchost.exe | C:\Users\Admin\AppData\Roaming\svchost.exe |
| PID 4800 wrote to memory of 3236 | N/A | C:\Users\Admin\svchost.exe | C:\Users\Admin\AppData\Roaming\svchost.exe |
| PID 4800 wrote to memory of 3236 | N/A | C:\Users\Admin\svchost.exe | C:\Users\Admin\AppData\Roaming\svchost.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe
"C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe"
C:\Users\Admin\svchost.exe
"C:\Users\Admin\svchost.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3708 -s 1436
C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 69.121.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 6.tcp.eu.ngrok.io | udp |
| DE | 52.28.247.255:16195 | 6.tcp.eu.ngrok.io | tcp |
| US | 8.8.8.8:53 | 255.247.28.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 64.13.109.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.57.101.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.173.189.20.in-addr.arpa | udp |
Files
memory/3708-120-0x00000000003A0000-0x00000000003CE000-memory.dmp
C:\Users\Admin\svchost.exe
| MD5 | 99198c628ae018b8b7d043514141bded |
| SHA1 | fa9b200d99530fb5efb36e7f928ad01f4dec5ed8 |
| SHA256 | 160c2339126bc7800801d9d41d688f88d2d2656f711e8bc53a74fe179510e895 |
| SHA512 | 0dd0f1210120d2a3838135f250460cac64ad50ee4d7393409923dadde0f8a791288ef0a2cba96e6b9ee8bb27e190b403d3c1dfd2f4a0e2262543100fdd404f4a |
C:\Users\Admin\svchost.exe
| MD5 | 99198c628ae018b8b7d043514141bded |
| SHA1 | fa9b200d99530fb5efb36e7f928ad01f4dec5ed8 |
| SHA256 | 160c2339126bc7800801d9d41d688f88d2d2656f711e8bc53a74fe179510e895 |
| SHA512 | 0dd0f1210120d2a3838135f250460cac64ad50ee4d7393409923dadde0f8a791288ef0a2cba96e6b9ee8bb27e190b403d3c1dfd2f4a0e2262543100fdd404f4a |
memory/4800-127-0x0000000000D50000-0x0000000000D72000-memory.dmp
memory/4800-128-0x0000000006200000-0x00000000066FE000-memory.dmp
memory/4800-129-0x0000000005A40000-0x0000000005AD2000-memory.dmp
memory/4800-130-0x0000000005D00000-0x0000000005E00000-memory.dmp
memory/4800-131-0x0000000003470000-0x000000000347A000-memory.dmp
C:\Users\Admin\AppData\Roaming\svchost.exe
| MD5 | 99198c628ae018b8b7d043514141bded |
| SHA1 | fa9b200d99530fb5efb36e7f928ad01f4dec5ed8 |
| SHA256 | 160c2339126bc7800801d9d41d688f88d2d2656f711e8bc53a74fe179510e895 |
| SHA512 | 0dd0f1210120d2a3838135f250460cac64ad50ee4d7393409923dadde0f8a791288ef0a2cba96e6b9ee8bb27e190b403d3c1dfd2f4a0e2262543100fdd404f4a |
C:\Users\Admin\AppData\Roaming\svchost.exe
| MD5 | 99198c628ae018b8b7d043514141bded |
| SHA1 | fa9b200d99530fb5efb36e7f928ad01f4dec5ed8 |
| SHA256 | 160c2339126bc7800801d9d41d688f88d2d2656f711e8bc53a74fe179510e895 |
| SHA512 | 0dd0f1210120d2a3838135f250460cac64ad50ee4d7393409923dadde0f8a791288ef0a2cba96e6b9ee8bb27e190b403d3c1dfd2f4a0e2262543100fdd404f4a |
C:\Users\Admin\AppData\Roaming\svchost.exe
| MD5 | 99198c628ae018b8b7d043514141bded |
| SHA1 | fa9b200d99530fb5efb36e7f928ad01f4dec5ed8 |
| SHA256 | 160c2339126bc7800801d9d41d688f88d2d2656f711e8bc53a74fe179510e895 |
| SHA512 | 0dd0f1210120d2a3838135f250460cac64ad50ee4d7393409923dadde0f8a791288ef0a2cba96e6b9ee8bb27e190b403d3c1dfd2f4a0e2262543100fdd404f4a |
memory/3236-137-0x0000000005600000-0x0000000005700000-memory.dmp
memory/3236-138-0x0000000009840000-0x00000000098A6000-memory.dmp
memory/3236-139-0x0000000005600000-0x0000000005700000-memory.dmp