Analysis Overview
SHA256
aaf3217873dc472a323ea35b46a945635a4b20fc9ccec6eae30cef0ab770e16f
Threat Level: Known bad
The file sam1 was found to be: Known bad.
Malicious Activity Summary
UAC bypass
Modifies WinLogon for persistence
Modifies firewall policy service
Ramnit
Modifies security service
Windows security bypass
UPX packed file
Drops startup file
Windows security modification
Checks whether UAC is enabled
Adds Run key to start application
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
System policy modification
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-28 01:56
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-28 01:56
Reported
2024-03-28 01:56
Platform
win7-20240221-en
Max time kernel
4s
Max time network
2s
Command Line
Signatures
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,,C:\\Users\\Admin\\AppData\\Local\\tlueyhtg\\crmqjhdw.exe" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,C:\\Users\\Admin\\AppData\\Local\\tlueyhtg\\crmqjhdw.exe" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Modifies firewall policy service
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Modifies security service
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\MpsSvc\Start = "4" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\WinDefend\Start = "4" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wuauserv\Start = "4" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Ramnit
UAC bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Windows security bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crmqjhdw.exe | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crmqjhdw.exe | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
UPX packed file
| 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 |
Windows security modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000\Software\Microsoft\Windows\CurrentVersion\Run\CrmQjhdw = "C:\\Users\\Admin\\AppData\\Local\\tlueyhtg\\crmqjhdw.exe" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeSecurityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
System policy modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\sam1.exe
"C:\Users\Admin\AppData\Local\Temp\sam1.exe"
Network
Files
memory/2244-1-0x0000000015190000-0x000000001527D000-memory.dmp
memory/2244-0-0x0000000001EB0000-0x0000000001EB1000-memory.dmp
memory/2244-2-0x00000000002C0000-0x00000000002C1000-memory.dmp
memory/2244-4-0x0000000015190000-0x000000001527D000-memory.dmp
memory/2244-5-0x0000000015190000-0x000000001527D000-memory.dmp
memory/2244-9-0x0000000015190000-0x000000001527D000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-28 01:56
Reported
2024-03-28 01:59
Platform
win10v2004-20240226-en
Max time kernel
146s
Max time network
154s
Command Line
Signatures
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,,C:\\Users\\Admin\\AppData\\Local\\tjirxumr\\cmwhiuvi.exe" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Modifies firewall policy service
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Modifies security service
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\mpssvc\Start = "4" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wuauserv\Start = "4" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Ramnit
UAC bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Windows security bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UacDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cmwhiuvi.exe | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cmwhiuvi.exe | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
UPX packed file
| 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 |
Windows security modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UacDisableNotify = "1" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CmwHiuvi = "C:\\Users\\Admin\\AppData\\Local\\tjirxumr\\cmwhiuvi.exe" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeSecurityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
System policy modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Users\Admin\AppData\Local\Temp\sam1.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\sam1.exe
"C:\Users\Admin\AppData\Local\Temp\sam1.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 64.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 202.121.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 29.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 194.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 214.143.182.52.in-addr.arpa | udp |
Files
memory/940-2-0x00000000009D0000-0x00000000009D1000-memory.dmp
memory/940-1-0x0000000015190000-0x000000001527D000-memory.dmp
memory/940-0-0x00000000009B0000-0x00000000009B1000-memory.dmp
memory/940-4-0x0000000015190000-0x000000001527D000-memory.dmp
memory/940-8-0x0000000015190000-0x000000001527D000-memory.dmp
memory/940-9-0x0000000015190000-0x000000001527D000-memory.dmp