Analysis Overview
SHA256
0a6be94628e528a0354c71a800510ab89c442a5f3a428a49b729662d4d19529c
Threat Level: Known bad
The file DocumentPreview.exe was found to be: Known bad.
Malicious Activity Summary
Modifies WinLogon for persistence
Buer
Buer Loader
Executes dropped EXE
Loads dropped DLL
Deletes itself
Enumerates connected drives
Enumerates physical storage devices
Program crash
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2020-07-14 18:24
Signatures
Analysis: behavioral2
Detonation Overview
Submitted
2020-07-14 18:24
Reported
2020-07-14 18:26
Platform
win10v200430
Max time kernel
124s
Max time network
126s
Command Line
Signatures
Buer
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\b6a8e8f24bc6b598ce7d\\gennt.exe\"" | C:\ProgramData\b6a8e8f24bc6b598ce7d\gennt.exe | N/A |
Buer Loader
| Description | Indicator | Process | Target |
| 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:\ProgramData\b6a8e8f24bc6b598ce7d\gennt.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\b6a8e8f24bc6b598ce7d\gennt.exe | N/A |
Enumerates connected drives
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\secinit.exe |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\ProgramData\b6a8e8f24bc6b598ce7d\gennt.exe | N/A |
| N/A | N/A | C:\ProgramData\b6a8e8f24bc6b598ce7d\gennt.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeRestorePrivilege | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\DocumentPreview.exe
"C:\Users\Admin\AppData\Local\Temp\DocumentPreview.exe"
C:\ProgramData\b6a8e8f24bc6b598ce7d\gennt.exe
C:\ProgramData\b6a8e8f24bc6b598ce7d\gennt.exe "C:\Users\Admin\AppData\Local\Temp\DocumentPreview.exe" ensgJJ
C:\Windows\SysWOW64\secinit.exe
C:\ProgramData\b6a8e8f24bc6b598ce7d\gennt.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2676 -s 420
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\b6a8e8f24bc6b598ce7d}"
Network
| Country | Destination | Domain | Proto |
| N/A | 162.244.81.87:443 | tcp | |
| N/A | 13.107.4.52:80 | www.msftconnecttest.com | tcp |
| N/A | 162.244.81.87:443 | tcp | |
| N/A | 162.244.81.87:443 | tcp |
Files
memory/2536-0-0x0000000000660000-0x000000000066C000-memory.dmp
memory/2652-1-0x0000000000000000-mapping.dmp
C:\ProgramData\b6a8e8f24bc6b598ce7d\gennt.exe
| MD5 | 801b2019d58f05ea3667603d3f2ff822 |
| SHA1 | ce0c63d9c1dd967d68158156e1c88e731fa25447 |
| SHA256 | 0a6be94628e528a0354c71a800510ab89c442a5f3a428a49b729662d4d19529c |
| SHA512 | 8ef21833c493cb7bfad632df1842216dbcf7fa54fd87cb065d8d32fc120635b802e93481128f01d53bb7b5f32fa4d50122b4099f38cc348f9153a3b43be6131a |
C:\ProgramData\b6a8e8f24bc6b598ce7d\gennt.exe
| MD5 | 801b2019d58f05ea3667603d3f2ff822 |
| SHA1 | ce0c63d9c1dd967d68158156e1c88e731fa25447 |
| SHA256 | 0a6be94628e528a0354c71a800510ab89c442a5f3a428a49b729662d4d19529c |
| SHA512 | 8ef21833c493cb7bfad632df1842216dbcf7fa54fd87cb065d8d32fc120635b802e93481128f01d53bb7b5f32fa4d50122b4099f38cc348f9153a3b43be6131a |
memory/2652-4-0x0000000000590000-0x000000000059C000-memory.dmp
memory/2676-5-0x0000000000000000-mapping.dmp
memory/3224-6-0x00000000044F0000-0x00000000044F1000-memory.dmp
memory/2676-7-0x0000000000000000-mapping.dmp
memory/2676-8-0x0000000000000000-mapping.dmp
memory/2676-9-0x0000000000000000-mapping.dmp
memory/2676-10-0x0000000000000000-mapping.dmp
memory/2676-11-0x0000000000000000-mapping.dmp
memory/3224-12-0x0000000004ED0000-0x0000000004ED1000-memory.dmp
memory/3476-13-0x0000000000000000-mapping.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2020-07-14 18:24
Reported
2020-07-14 18:26
Platform
win7
Max time kernel
92s
Max time network
85s
Command Line
Signatures
Buer
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\12ab6e5e52ff0c5398ba\\gennt.exe\"" | C:\ProgramData\12ab6e5e52ff0c5398ba\gennt.exe | N/A |
Buer Loader
| Description | Indicator | Process | Target |
| 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:\ProgramData\12ab6e5e52ff0c5398ba\gennt.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\12ab6e5e52ff0c5398ba\gennt.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\DocumentPreview.exe | N/A |
Enumerates connected drives
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\secinit.exe |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\ProgramData\12ab6e5e52ff0c5398ba\gennt.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\DocumentPreview.exe
"C:\Users\Admin\AppData\Local\Temp\DocumentPreview.exe"
C:\ProgramData\12ab6e5e52ff0c5398ba\gennt.exe
C:\ProgramData\12ab6e5e52ff0c5398ba\gennt.exe "C:\Users\Admin\AppData\Local\Temp\DocumentPreview.exe" ensgJJ
C:\Windows\SysWOW64\secinit.exe
C:\ProgramData\12ab6e5e52ff0c5398ba\gennt.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1240 -s 144
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\12ab6e5e52ff0c5398ba}"
Network
| Country | Destination | Domain | Proto |
| N/A | 162.244.81.87:443 | tcp | |
| N/A | 162.244.81.87:443 | tcp | |
| N/A | 162.244.81.87:443 | tcp |
Files
memory/1104-0-0x0000000000260000-0x000000000026C000-memory.dmp
\ProgramData\12ab6e5e52ff0c5398ba\gennt.exe
| MD5 | 801b2019d58f05ea3667603d3f2ff822 |
| SHA1 | ce0c63d9c1dd967d68158156e1c88e731fa25447 |
| SHA256 | 0a6be94628e528a0354c71a800510ab89c442a5f3a428a49b729662d4d19529c |
| SHA512 | 8ef21833c493cb7bfad632df1842216dbcf7fa54fd87cb065d8d32fc120635b802e93481128f01d53bb7b5f32fa4d50122b4099f38cc348f9153a3b43be6131a |
memory/1832-2-0x0000000000000000-mapping.dmp
C:\ProgramData\12ab6e5e52ff0c5398ba\gennt.exe
| MD5 | 801b2019d58f05ea3667603d3f2ff822 |
| SHA1 | ce0c63d9c1dd967d68158156e1c88e731fa25447 |
| SHA256 | 0a6be94628e528a0354c71a800510ab89c442a5f3a428a49b729662d4d19529c |
| SHA512 | 8ef21833c493cb7bfad632df1842216dbcf7fa54fd87cb065d8d32fc120635b802e93481128f01d53bb7b5f32fa4d50122b4099f38cc348f9153a3b43be6131a |
memory/1832-4-0x0000000000250000-0x000000000025C000-memory.dmp
C:\ProgramData\12ab6e5e52ff0c5398ba\gennt.exe
| MD5 | 801b2019d58f05ea3667603d3f2ff822 |
| SHA1 | ce0c63d9c1dd967d68158156e1c88e731fa25447 |
| SHA256 | 0a6be94628e528a0354c71a800510ab89c442a5f3a428a49b729662d4d19529c |
| SHA512 | 8ef21833c493cb7bfad632df1842216dbcf7fa54fd87cb065d8d32fc120635b802e93481128f01d53bb7b5f32fa4d50122b4099f38cc348f9153a3b43be6131a |
memory/1240-6-0x0000000000000000-mapping.dmp
memory/1808-7-0x0000000000000000-mapping.dmp
memory/1808-8-0x0000000001FB0000-0x0000000001FC1000-memory.dmp
memory/1240-9-0x0000000000000000-mapping.dmp
memory/1240-10-0x0000000000000000-mapping.dmp
memory/1808-11-0x0000000002600000-0x0000000002611000-memory.dmp
memory/1872-12-0x0000000000000000-mapping.dmp