Analysis Overview
SHA256
e212e5bc428a0bca4615205f07c10d4e57dc881a2f32a9b8aeec040169435aa1
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 behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2020-07-08 15:40
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2020-07-08 15:40
Reported
2020-07-08 15:42
Platform
win7
Max time kernel
149s
Max time network
155s
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\\563b2a5942b492d3dbe0\\gennt.exe\"" | C:\ProgramData\563b2a5942b492d3dbe0\gennt.exe | N/A |
Buer Loader
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\563b2a5942b492d3dbe0\gennt.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\563b2a5942b492d3dbe0\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\563b2a5942b492d3dbe0\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\563b2a5942b492d3dbe0\gennt.exe
C:\ProgramData\563b2a5942b492d3dbe0\gennt.exe "C:\Users\Admin\AppData\Local\Temp\DocumentPreview.exe" ensgJJ
C:\Windows\SysWOW64\secinit.exe
C:\ProgramData\563b2a5942b492d3dbe0\gennt.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1812 -s 160
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\563b2a5942b492d3dbe0}"
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/1496-0-0x0000000000030000-0x000000000003C000-memory.dmp
\ProgramData\563b2a5942b492d3dbe0\gennt.exe
| MD5 | db3c2530d727bac602e6c41cb3e60562 |
| SHA1 | 0d62d5a5fba84c1e826591f27892466a1cd59257 |
| SHA256 | e212e5bc428a0bca4615205f07c10d4e57dc881a2f32a9b8aeec040169435aa1 |
| SHA512 | 03e25d32a262c88ec2cf9303b7835da93b321a1d2a092531c96df8d95065944250f63c075792ca72b6d2a12d60c492782ba516712fbca0bf3b0239477b6b06e8 |
memory/1904-2-0x0000000000000000-mapping.dmp
C:\ProgramData\563b2a5942b492d3dbe0\gennt.exe
| MD5 | db3c2530d727bac602e6c41cb3e60562 |
| SHA1 | 0d62d5a5fba84c1e826591f27892466a1cd59257 |
| SHA256 | e212e5bc428a0bca4615205f07c10d4e57dc881a2f32a9b8aeec040169435aa1 |
| SHA512 | 03e25d32a262c88ec2cf9303b7835da93b321a1d2a092531c96df8d95065944250f63c075792ca72b6d2a12d60c492782ba516712fbca0bf3b0239477b6b06e8 |
C:\ProgramData\563b2a5942b492d3dbe0\gennt.exe
| MD5 | db3c2530d727bac602e6c41cb3e60562 |
| SHA1 | 0d62d5a5fba84c1e826591f27892466a1cd59257 |
| SHA256 | e212e5bc428a0bca4615205f07c10d4e57dc881a2f32a9b8aeec040169435aa1 |
| SHA512 | 03e25d32a262c88ec2cf9303b7835da93b321a1d2a092531c96df8d95065944250f63c075792ca72b6d2a12d60c492782ba516712fbca0bf3b0239477b6b06e8 |
memory/1812-6-0x0000000000000000-mapping.dmp
memory/1876-7-0x0000000000000000-mapping.dmp
memory/1876-8-0x0000000001D30000-0x0000000001D41000-memory.dmp
memory/1812-9-0x0000000000000000-mapping.dmp
memory/1812-10-0x0000000000000000-mapping.dmp
memory/1876-11-0x00000000024E0000-0x00000000024F1000-memory.dmp
memory/1584-12-0x0000000000000000-mapping.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2020-07-08 15:40
Reported
2020-07-08 15:42
Platform
win10v200430
Max time kernel
138s
Max time network
143s
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\\ae99cb89d6941a0b3431\\gennt.exe\"" | C:\ProgramData\ae99cb89d6941a0b3431\gennt.exe | N/A |
Buer Loader
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\ae99cb89d6941a0b3431\gennt.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\ae99cb89d6941a0b3431\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\ae99cb89d6941a0b3431\gennt.exe | N/A |
| N/A | N/A | C:\ProgramData\ae99cb89d6941a0b3431\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\ae99cb89d6941a0b3431\gennt.exe
C:\ProgramData\ae99cb89d6941a0b3431\gennt.exe "C:\Users\Admin\AppData\Local\Temp\DocumentPreview.exe" ensgJJ
C:\Windows\SysWOW64\secinit.exe
C:\ProgramData\ae99cb89d6941a0b3431\gennt.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4000 -s 352
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\ae99cb89d6941a0b3431}"
Network
| Country | Destination | Domain | Proto |
| 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 | |
| N/A | 162.244.81.87:443 | tcp |
Files
memory/2904-0-0x00000000001D0000-0x00000000001DC000-memory.dmp
memory/3720-1-0x0000000000000000-mapping.dmp
C:\ProgramData\ae99cb89d6941a0b3431\gennt.exe
| MD5 | db3c2530d727bac602e6c41cb3e60562 |
| SHA1 | 0d62d5a5fba84c1e826591f27892466a1cd59257 |
| SHA256 | e212e5bc428a0bca4615205f07c10d4e57dc881a2f32a9b8aeec040169435aa1 |
| SHA512 | 03e25d32a262c88ec2cf9303b7835da93b321a1d2a092531c96df8d95065944250f63c075792ca72b6d2a12d60c492782ba516712fbca0bf3b0239477b6b06e8 |
C:\ProgramData\ae99cb89d6941a0b3431\gennt.exe
| MD5 | db3c2530d727bac602e6c41cb3e60562 |
| SHA1 | 0d62d5a5fba84c1e826591f27892466a1cd59257 |
| SHA256 | e212e5bc428a0bca4615205f07c10d4e57dc881a2f32a9b8aeec040169435aa1 |
| SHA512 | 03e25d32a262c88ec2cf9303b7835da93b321a1d2a092531c96df8d95065944250f63c075792ca72b6d2a12d60c492782ba516712fbca0bf3b0239477b6b06e8 |
memory/4000-5-0x0000000000000000-mapping.dmp
memory/3912-6-0x00000000043C0000-0x00000000043C1000-memory.dmp
memory/4000-8-0x0000000000000000-mapping.dmp
memory/4000-7-0x0000000000000000-mapping.dmp
memory/4000-10-0x0000000000000000-mapping.dmp
memory/4000-9-0x0000000000000000-mapping.dmp
memory/4000-11-0x0000000000000000-mapping.dmp
memory/3912-12-0x0000000004C30000-0x0000000004C31000-memory.dmp
memory/3740-13-0x0000000000000000-mapping.dmp