Analysis Overview
SHA256
ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47f
Threat Level: Known bad
The file ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN was found to be: Known bad.
Malicious Activity Summary
Modifies WinLogon for persistence
Modifies visiblity of hidden/system files in Explorer
Modifies visibility of file extensions in Explorer
Disables use of System Restore points
Disables RegEdit via registry modification
Executes dropped EXE
Loads dropped DLL
Modifies system executable filetype association
Adds Run key to start application
Drops file in System32 directory
UPX packed file
Drops file in Windows directory
Enumerates physical storage devices
Unsigned PE
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Modifies registry class
System policy modification
Suspicious use of SetWindowsHookEx
Modifies Control Panel
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-07 15:04
Signatures
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-07 15:04
Reported
2024-11-07 15:06
Platform
win7-20240903-en
Max time kernel
117s
Max time network
118s
Command Line
Signatures
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\system32\\IExplorer.exe\"" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\IExplorer.exe" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Modifies visibility of file extensions in Explorer
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Modifies visiblity of hidden/system files in Explorer
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Disables RegEdit via registry modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Disables use of System Restore points
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\xk.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\IExplorer.exe | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE | N/A |
Loads dropped DLL
Modifies system executable filetype association
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\xk = "C:\\Windows\\xk.exe" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSMSGS = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\WINLOGON.EXE" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\ServiceAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\SERVICES.EXE" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\LogonAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\CSRSS.EXE" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\System Monitoring = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\LSASS.EXE" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\shell.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File created | C:\Windows\SysWOW64\Mig2.scr | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File created | C:\Windows\SysWOW64\IExplorer.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\IExplorer.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\Mig2.scr | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\shell.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
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Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\xk.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File created | C:\Windows\xk.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\xk.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\IExplorer.exe | N/A |
Modifies Control Panel
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\Desktop\SCRNSAVE.EXE = "C:\\Windows\\system32\\Mig~mig.SCR" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\Desktop\ScreenSaverIsSecure = "0" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\Desktop\ScreenSaveTimeOut = "600" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\Desktop\ | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Modifies registry class
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| N/A | N/A | C:\Windows\xk.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\IExplorer.exe | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE | N/A |
Suspicious use of WriteProcessMemory
System policy modification
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions = "1" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe
"C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe"
C:\Windows\xk.exe
C:\Windows\xk.exe
C:\Windows\SysWOW64\IExplorer.exe
C:\Windows\system32\IExplorer.exe
C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
Network
Files
memory/804-1-0x0000000000400000-0x000000000042F000-memory.dmp
C:\Users\Admin\AppData\Local\winlogon.exe
| MD5 | 07f35139b8c124c730d8c073b7b9cfc0 |
| SHA1 | 1bda918d117b2e20ff9543c03a4abaeb799119fa |
| SHA256 | ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47f |
| SHA512 | ee478bbcf7273843d31cc5e77df4612edf12d2dfcc3a19e08e27ed38fa63b004df23265cbc9644bdd1bb3f23fb894b4fc366b25e8afe9fc9b40c50fdc382488f |
memory/2680-112-0x0000000000400000-0x000000000042F000-memory.dmp
memory/804-111-0x00000000030E0000-0x000000000310F000-memory.dmp
memory/804-110-0x00000000030E0000-0x000000000310F000-memory.dmp
C:\Windows\xk.exe
| MD5 | a85a1c8b5b2e31fb3c2a6869eebc3f6c |
| SHA1 | f5d2e05c4e2e6b26c3e3f62710b746e1245526f8 |
| SHA256 | 150151fd93154ad4479dbf0ed1932b80cd2f5d07abae865e8c5a503dad8e52df |
| SHA512 | c4f657ab70eb9e547c32e98188cd3c6a7bbb13e85506c4970e24ca70793958f897c468c1a38fc7553f7323bd00cbaacd49ce1a3522b3de71df775cfcc1baba02 |
\Windows\SysWOW64\IExplorer.exe
| MD5 | 6bdc73ecfa102cd08af218df9c48ae6f |
| SHA1 | a60d094c2445948e5ae9198a27ff36de1822b066 |
| SHA256 | 8f9b39b8a75e36c548091e3c8ca65106e5b25f32f359d2ac1fabd12ef9d84d3f |
| SHA512 | 5de428f3a67cb0d8d3ac866db9954f22213b04d08d154c13bb1939787bfeaf4917bec74d4ecdcb69d7d0ee517fdd8338dbb370c97910f3d399d3a4acf5a3f0df |
memory/2680-122-0x0000000000400000-0x000000000042F000-memory.dmp
memory/680-127-0x0000000000400000-0x000000000042F000-memory.dmp
\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE
| MD5 | 6d8e869ce04fe543dd6953fd60db37c6 |
| SHA1 | f119b3fbc988325a5995c86d62d48fcbebf22305 |
| SHA256 | f28065d36192b6614254734628968436c1d89747190f400c3e672c31bd051578 |
| SHA512 | 41d31ca9dd3dfb1f9960965e58678f578e4db1c5191523e686286f731c441b6929782f9b63c009e2b8dc545b0e61d7fb61c36ded573f3f0e77be501150293d95 |
memory/596-135-0x0000000000400000-0x000000000042F000-memory.dmp
memory/596-138-0x0000000000400000-0x000000000042F000-memory.dmp
\Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE
| MD5 | 804863dfff2938bbfc77af1b029fb941 |
| SHA1 | 483411ff35a1513cb0e3beedca4d79c362d15375 |
| SHA256 | 08c2134d947eb73e06f4b2cd60441e1b93bc136ec178fe5aeee43511d045bed4 |
| SHA512 | b962b7b29589c4feb9458a36b0e035f40e07a2635ecba9f8a9d4e1b42853ab6161e8c65a3a196a6f1d64884572a8e3b1d9e9bbffc409acf6ac690697ab9bc7bf |
memory/804-146-0x0000000000400000-0x000000000042F000-memory.dmp
memory/1100-149-0x0000000000400000-0x000000000042F000-memory.dmp
\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE
| MD5 | 81bbad7845bd1c1d3fff0172fc3785d8 |
| SHA1 | 2a0f419ca218517d8bb3625419d867d61408932b |
| SHA256 | a7e502e7567b92375e4c2ddd4f38468cf778d3e19963646f2a41ac92e1963a99 |
| SHA512 | 237713afa574bc22558934d43c95c2826bfe0ee6d6f1c00a56131a2dccd11047218de3c4ffc46d4bbc7cfaa72d00f5cfe1988882acaa43914b383dc5f66f7f00 |
\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE
| MD5 | 8c3265d825e5e95ae0f0b7057c727e25 |
| SHA1 | 058ce81182f0889dbf44eecfb9694867549314e3 |
| SHA256 | 22c0da378e488d51a6923cf0bb1b9bce17087a5b9178d9119056d2cadd117eea |
| SHA512 | a211eae47e033767b864bd016e2f17d90f7599a3dfbb82f6f1907dc48e25bf8413471259abe77686ba6b747dd25abe8cda12922e7fec095723a852c12041aeeb |
memory/604-168-0x0000000000400000-0x000000000042F000-memory.dmp
memory/2448-167-0x0000000000400000-0x000000000042F000-memory.dmp
memory/604-172-0x0000000000400000-0x000000000042F000-memory.dmp
\Users\Admin\AppData\Local\WINDOWS\SMSS.EXE
| MD5 | d197dea8941ca6f8bffbd42f19cf015a |
| SHA1 | 6cb1c738e83d337123f27d7006db3aa35ac72adc |
| SHA256 | 7aab2c94d5bf3ecb9e377db728ba9782ea0267439e02f7d70b381b1a797b83b4 |
| SHA512 | 698268dc05a6272a76d486c642cb976bbebf3aed9e03b9d2927cc5599dce7ada55069bbd5ed98cf4ea6f34b1d3ff698184b8ab11a9de12ee89e91f00c455e804 |
memory/804-185-0x0000000000400000-0x000000000042F000-memory.dmp
memory/1264-184-0x0000000000400000-0x000000000042F000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-07 15:04
Reported
2024-11-07 15:06
Platform
win10v2004-20241007-en
Max time kernel
93s
Max time network
94s
Command Line
Signatures
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\system32\\IExplorer.exe\"" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\IExplorer.exe" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Modifies visibility of file extensions in Explorer
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Modifies visiblity of hidden/system files in Explorer
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Disables RegEdit via registry modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Disables use of System Restore points
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\xk.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\IExplorer.exe | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE | N/A |
Modifies system executable filetype association
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xk = "C:\\Windows\\xk.exe" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSMSGS = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\WINLOGON.EXE" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ServiceAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\SERVICES.EXE" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\LogonAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\CSRSS.EXE" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\System Monitoring = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\LSASS.EXE" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\shell.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File created | C:\Windows\SysWOW64\shell.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File created | C:\Windows\SysWOW64\Mig2.scr | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File created | C:\Windows\SysWOW64\IExplorer.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\IExplorer.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\Mig2.scr | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
UPX packed file
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Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\xk.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| File opened for modification | C:\Windows\xk.exe | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\xk.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\IExplorer.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE | N/A |
Modifies Control Panel
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\Desktop\ | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\Desktop\SCRNSAVE.EXE = "C:\\Windows\\system32\\Mig~mig.SCR" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\Desktop\ScreenSaverIsSecure = "0" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\Desktop\ScreenSaveTimeOut = "600" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Modifies registry class
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| N/A | N/A | C:\Windows\xk.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\IExplorer.exe | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE | N/A |
| N/A | N/A | C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE | N/A |
Suspicious use of WriteProcessMemory
System policy modification
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions = "1" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" | C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe
"C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe"
C:\Windows\xk.exe
C:\Windows\xk.exe
C:\Windows\SysWOW64\IExplorer.exe
C:\Windows\system32\IExplorer.exe
C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
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 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 83.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.163.202.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 105.209.201.84.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
Files
memory/2172-0-0x0000000000400000-0x000000000042F000-memory.dmp
C:\Users\Admin\AppData\Local\winlogon.exe
| MD5 | 07f35139b8c124c730d8c073b7b9cfc0 |
| SHA1 | 1bda918d117b2e20ff9543c03a4abaeb799119fa |
| SHA256 | ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47f |
| SHA512 | ee478bbcf7273843d31cc5e77df4612edf12d2dfcc3a19e08e27ed38fa63b004df23265cbc9644bdd1bb3f23fb894b4fc366b25e8afe9fc9b40c50fdc382488f |
C:\Windows\xk.exe
| MD5 | 287a690b831ad3a09eb5bacc8e82fc70 |
| SHA1 | a29984d6258859e7ac9f826505d1292cb12d4b72 |
| SHA256 | e6168dd5ac5db9bbd14d842f7058deb7bed56c1215d4d73a2ab4ca3f47b4c68c |
| SHA512 | 92515b42263bca1187645bafe27fa779763d25d670ce6dca6bc430af5b67a4b94ce14a91ca27d86b0fe9433d460e2f8e7e484c71c8da50457237b5e27fa9fb27 |
C:\Windows\SysWOW64\IExplorer.exe
| MD5 | ca16bc883246f56484365df251136eb8 |
| SHA1 | 67595e01395731f4ab6c5df44e888d686dc1fa94 |
| SHA256 | 84bd429915f459b8d680cc5784d07255d7de6d48fb0d42d529a8df7adb79a6c8 |
| SHA512 | 2328388319befa430dd4f14b68d14370a033085dab9553c903fd18f0910f9b8fda26fb51226f933ced74a176452ff910150bea0035b14592a4e909b4b71553ff |
memory/4032-112-0x0000000000400000-0x000000000042F000-memory.dmp
memory/1656-117-0x0000000000400000-0x000000000042F000-memory.dmp
C:\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE
| MD5 | 78a55e33e9b70dc1a49db07d2cd7f122 |
| SHA1 | 10bc6aa48ef11ab2a3080bf289568ab3a284e71b |
| SHA256 | 5d02df8de8ae5248443a136a994c1f9e17769d7572f59f8d87a93e6028132c8b |
| SHA512 | da05cf175dbe14c2aba58b3f5deb38f2acbc1ccebe0aae5461e0d414b4e5055b25a7da0eac4232e980011c65575979a2b6c229cede430650fff525599d253fc7 |
memory/3368-124-0x0000000000400000-0x000000000042F000-memory.dmp
C:\Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE
| MD5 | 160020ded8997323f1c29c67457927cb |
| SHA1 | 153dbf6a07ede74140e700e4b2a6a5d8dc72813d |
| SHA256 | 1bffde0e07ae435974db0a9b95bb971acd94a773e9b5907de917a03851317c70 |
| SHA512 | f303a00d703c11f07f34bd7436c080a2a2ad1f82b89bd5a5b01e1c8631fbcd0c59f20526d559103c0d04524621e40d48b5197b2d32e33ee1a1617bfcc5e17490 |
memory/2260-132-0x0000000000400000-0x000000000042F000-memory.dmp
C:\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE
| MD5 | 9eb3af4ac8607b60cee12e0bb0e48b89 |
| SHA1 | 7e60a3639b0efe29c0ba3a208ee4b423aa47bea8 |
| SHA256 | 9eb6f3ab1e64e55f6495308115ea1ba69bf43ea170a0a99d59f32d7b19d64223 |
| SHA512 | 4ae423eaa21e12c285c83e058cbb9e1f0615a539b694e0f48c02e420a4e1b3d823c7cb69fcd5201f25cadfa26db971dc8e28db15edc21f0fa7bb064860e7f313 |
memory/4692-138-0x0000000000400000-0x000000000042F000-memory.dmp
C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
| MD5 | 1989c93a9cfe5e130eb2bd0506f3e75c |
| SHA1 | c13ebfa7db822a2f60f1095acfcef9b614a3c4b7 |
| SHA256 | 6e3e2c9c9993c3a0eeceebe2109e7f0d95479fca88116c89075aa4879eaf71a8 |
| SHA512 | fb2a9da71b77fcd09e1318874c6a7bfff079c7902355b557ff4af08dbac9934ef7c09988907d9e1a22f79a8ef00df74387c6074c04eb49893950949592cc7300 |
memory/4888-142-0x0000000000400000-0x000000000042F000-memory.dmp
memory/4888-146-0x0000000000400000-0x000000000042F000-memory.dmp
C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
| MD5 | 4bd71fe0af33f8f1760228c1b5599253 |
| SHA1 | d8635c76f654e3174555fe5f2808b8d9026a062f |
| SHA256 | f0c76d6443cd102136bf6f305d62735ec229e51075dc2aed3f917353d9eb31bb |
| SHA512 | 8b692a67b82873c64ccf55f06d982eda26fe4d142d65305e44e21c5f5bbb6af1b05f1449a1c41be96127210d7c4abbc6b1572b10bf26434bbc151e95d2e165f2 |
memory/3360-153-0x0000000000400000-0x000000000042F000-memory.dmp
memory/2172-154-0x0000000000400000-0x000000000042F000-memory.dmp