Analysis Overview
SHA256
5a651b2be779e145cde1ec5859f66a540c80e06af4504108fb8ed36396e463f9
Threat Level: Known bad
The file 228e499c_by_Libranalysis was found to be: Known bad.
Malicious Activity Summary
Phorphiex Payload
Phorphiex Worm
Modifies Windows Defender Real-time Protection settings
Windows security bypass
Executes dropped EXE
Loads dropped DLL
Windows security modification
Adds Run key to start application
Drops file in Program Files directory
Drops file in Windows directory
Program crash
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-05-12 07:02
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2021-05-12 07:02
Reported
2021-05-12 07:05
Platform
win7v20210408
Max time kernel
151s
Max time network
46s
Command Line
Signatures
Modifies Windows Defender Real-time Protection settings
Phorphiex Payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Phorphiex Worm
Windows security bypass
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\4281278655928\csrss.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.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 |
Windows security modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" | C:\Windows\4281278655928\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AutoUpdateDisableNotify = "1" | C:\Windows\4281278655928\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" | C:\Windows\4281278655928\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1" | C:\Windows\4281278655928\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesOverride = "1" | C:\Windows\4281278655928\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1" | C:\Windows\4281278655928\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" | C:\Windows\4281278655928\csrss.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Client Server Runtime Process = "C:\\Windows\\4281278655928\\csrss.exe" | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\Client Server Runtime Process = "C:\\Windows\\4281278655928\\csrss.exe" | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Program Files\7-Zip\7z.exe | C:\Windows\4281278655928\csrss.exe | N/A |
| File opened for modification | C:\Program Files\7-Zip\7zfm.exe | C:\Windows\4281278655928\csrss.exe | N/A |
| File opened for modification | C:\Program Files\7-Zip\7zg.exe | C:\Windows\4281278655928\csrss.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\4281278655928 | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | N/A |
| File created | C:\Windows\4281278655928\csrss.exe | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | N/A |
| File opened for modification | C:\Windows\4281278655928\csrss.exe | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | N/A |
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\4281278655928\csrss.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 |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.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\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe
"C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe"
C:\Windows\4281278655928\csrss.exe
C:\Windows\4281278655928\csrss.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 760
Network
Files
memory/1652-60-0x00000000754F1000-0x00000000754F3000-memory.dmp
memory/1652-61-0x0000000000230000-0x000000000024A000-memory.dmp
memory/1652-62-0x0000000000400000-0x00000000004D2000-memory.dmp
\Windows\4281278655928\csrss.exe
| MD5 | dd1aa660f2f24368dd58c5ce7a709b6c |
| SHA1 | a54d435a04d3e883b1773d1c8d439dc95628fa07 |
| SHA256 | 25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e |
| SHA512 | a86738a5fd7915f3fbd9ddc8b5c3e01a936074749b7e8d14ceb91defef6657b5e5c1fc76fc6461b86424add2099c14b90c88b7b84de53928404562f2148b16b5 |
memory/1768-64-0x0000000000000000-mapping.dmp
C:\Windows\4281278655928\csrss.exe
| MD5 | dd1aa660f2f24368dd58c5ce7a709b6c |
| SHA1 | a54d435a04d3e883b1773d1c8d439dc95628fa07 |
| SHA256 | 25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e |
| SHA512 | a86738a5fd7915f3fbd9ddc8b5c3e01a936074749b7e8d14ceb91defef6657b5e5c1fc76fc6461b86424add2099c14b90c88b7b84de53928404562f2148b16b5 |
memory/1768-67-0x00000000002E0000-0x00000000002FA000-memory.dmp
C:\Windows\4281278655928\csrss.exe
| MD5 | dd1aa660f2f24368dd58c5ce7a709b6c |
| SHA1 | a54d435a04d3e883b1773d1c8d439dc95628fa07 |
| SHA256 | 25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e |
| SHA512 | a86738a5fd7915f3fbd9ddc8b5c3e01a936074749b7e8d14ceb91defef6657b5e5c1fc76fc6461b86424add2099c14b90c88b7b84de53928404562f2148b16b5 |
memory/1648-70-0x0000000000000000-mapping.dmp
\Windows\4281278655928\csrss.exe
| MD5 | dd1aa660f2f24368dd58c5ce7a709b6c |
| SHA1 | a54d435a04d3e883b1773d1c8d439dc95628fa07 |
| SHA256 | 25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e |
| SHA512 | a86738a5fd7915f3fbd9ddc8b5c3e01a936074749b7e8d14ceb91defef6657b5e5c1fc76fc6461b86424add2099c14b90c88b7b84de53928404562f2148b16b5 |
\Windows\4281278655928\csrss.exe
| MD5 | dd1aa660f2f24368dd58c5ce7a709b6c |
| SHA1 | a54d435a04d3e883b1773d1c8d439dc95628fa07 |
| SHA256 | 25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e |
| SHA512 | a86738a5fd7915f3fbd9ddc8b5c3e01a936074749b7e8d14ceb91defef6657b5e5c1fc76fc6461b86424add2099c14b90c88b7b84de53928404562f2148b16b5 |
\Windows\4281278655928\csrss.exe
| MD5 | dd1aa660f2f24368dd58c5ce7a709b6c |
| SHA1 | a54d435a04d3e883b1773d1c8d439dc95628fa07 |
| SHA256 | 25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e |
| SHA512 | a86738a5fd7915f3fbd9ddc8b5c3e01a936074749b7e8d14ceb91defef6657b5e5c1fc76fc6461b86424add2099c14b90c88b7b84de53928404562f2148b16b5 |
memory/1648-74-0x00000000007B0000-0x00000000007B1000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2021-05-12 07:02
Reported
2021-05-12 07:04
Platform
win10v20210410
Max time kernel
96s
Max time network
117s
Command Line
Signatures
Modifies Windows Defender Real-time Protection settings
Phorphiex Payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Phorphiex Worm
Windows security bypass
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\15075354021841\csrss.exe | N/A |
Windows security modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesOverride = "1" | C:\Windows\15075354021841\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1" | C:\Windows\15075354021841\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" | C:\Windows\15075354021841\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" | C:\Windows\15075354021841\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AutoUpdateDisableNotify = "1" | C:\Windows\15075354021841\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" | C:\Windows\15075354021841\csrss.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1" | C:\Windows\15075354021841\csrss.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Client Server Runtime Process = "C:\\Windows\\15075354021841\\csrss.exe" | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\Client Server Runtime Process = "C:\\Windows\\15075354021841\\csrss.exe" | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Program Files\7-Zip\7z.exe | C:\Windows\15075354021841\csrss.exe | N/A |
| File opened for modification | C:\Program Files\7-Zip\7zfm.exe | C:\Windows\15075354021841\csrss.exe | N/A |
| File opened for modification | C:\Program Files\7-Zip\7zg.exe | C:\Windows\15075354021841\csrss.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\15075354021841\csrss.exe | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | N/A |
| File opened for modification | C:\Windows\15075354021841\csrss.exe | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | N/A |
| File opened for modification | C:\Windows\15075354021841 | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | N/A |
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\15075354021841\csrss.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:\Windows\SysWOW64\WerFault.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
| Description | Indicator | Process | Target |
| PID 1840 wrote to memory of 4012 | N/A | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | C:\Windows\15075354021841\csrss.exe |
| PID 1840 wrote to memory of 4012 | N/A | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | C:\Windows\15075354021841\csrss.exe |
| PID 1840 wrote to memory of 4012 | N/A | C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe | C:\Windows\15075354021841\csrss.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe
"C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe"
C:\Windows\15075354021841\csrss.exe
C:\Windows\15075354021841\csrss.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4012 -s 1288
Network
| Country | Destination | Domain | Proto |
| N/A | 217.8.117.63:80 | tcp |
Files
memory/1840-114-0x00000000004E0000-0x000000000058E000-memory.dmp
memory/1840-115-0x0000000000400000-0x00000000004D2000-memory.dmp
memory/4012-116-0x0000000000000000-mapping.dmp
C:\Windows\15075354021841\csrss.exe
| MD5 | dd1aa660f2f24368dd58c5ce7a709b6c |
| SHA1 | a54d435a04d3e883b1773d1c8d439dc95628fa07 |
| SHA256 | 25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e |
| SHA512 | a86738a5fd7915f3fbd9ddc8b5c3e01a936074749b7e8d14ceb91defef6657b5e5c1fc76fc6461b86424add2099c14b90c88b7b84de53928404562f2148b16b5 |
C:\Windows\15075354021841\csrss.exe
| MD5 | dd1aa660f2f24368dd58c5ce7a709b6c |
| SHA1 | a54d435a04d3e883b1773d1c8d439dc95628fa07 |
| SHA256 | 25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e |
| SHA512 | a86738a5fd7915f3fbd9ddc8b5c3e01a936074749b7e8d14ceb91defef6657b5e5c1fc76fc6461b86424add2099c14b90c88b7b84de53928404562f2148b16b5 |
memory/4012-119-0x00000000001D0000-0x00000000001F3000-memory.dmp