Analysis Overview
SHA256
644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c
Threat Level: Known bad
The file 644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c was found to be: Known bad.
Malicious Activity Summary
Imminent RAT
Executes dropped EXE
Loads dropped DLL
Drops startup file
Drops desktop.ini file(s)
Suspicious use of SetThreadContext
Drops file in Windows directory
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-06-25 11:25
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-06-25 11:25
Reported
2022-06-25 13:33
Platform
win7-20220414-en
Max time kernel
168s
Max time network
192s
Command Line
Signatures
Imminent RAT
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\csrsss.exe.lnk | C:\Users\Admin\AppData\Local\Temp\644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1912 set thread context of 1168 | N/A | C:\Users\Admin\AppData\Local\Temp\644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c.exe | C:\Users\Admin\AppData\Local\Temp\csrsss.exe |
Enumerates physical storage devices
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\timeout.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
| Token: 33 | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c.exe
"C:\Users\Admin\AppData\Local\Temp\644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c.exe"
C:\Windows\SysWOW64\cmd.exe
"cmd.exe"
C:\Windows\SysWOW64\reg.exe
reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\Microsoft\csrsss.exe.lnk " /f
C:\Users\Admin\AppData\Local\Temp\csrsss.exe
"C:\Users\Admin\AppData\Local\Temp\csrsss.exe"
C:\Windows\SysWOW64\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Microsoft\csrsss.exe.bat
C:\Windows\SysWOW64\timeout.exe
timeout /t 300
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | auxwin.duckdns.org | udp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| US | 8.8.8.8:53 | auxwin.duckdns.org | udp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| US | 8.8.8.8:53 | auxwin.duckdns.org | udp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
Files
memory/1912-54-0x0000000076721000-0x0000000076723000-memory.dmp
memory/1912-55-0x0000000074A50000-0x0000000074FFB000-memory.dmp
memory/1288-56-0x0000000000000000-mapping.dmp
memory/1376-57-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\Temp\Microsoft\csrsss.exe
| MD5 | bf41f994a287a74be5fa1b9bbef61e25 |
| SHA1 | 6dad025caf3ab68aeba93b079356eeb9edc36d16 |
| SHA256 | 644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c |
| SHA512 | ccc28c30cb0cc380aecf6067b66312e423341dd46112652b69137dd333f4683dfa779c2509e97f7c39a61f5e7ee647ff04016407e5a98a3738b5cf2c6d946294 |
\Users\Admin\AppData\Local\Temp\csrsss.exe
| MD5 | 278edbd499374bf73621f8c1f969d894 |
| SHA1 | a81170af14747781c5f5f51bb1215893136f0bc0 |
| SHA256 | c6999b9f79932c3b4f1c461a69d9dc8dc301d6a155abc33efe1b6e9e4a038391 |
| SHA512 | 93b0b5c3324bd2df83310f96d34c9176c94d2d676766599c1af33c98ba1efe63187056671f7c6f80c956e5bd0a725f108804021ad93326286bb9c3a96f6550b9 |
memory/1168-60-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1168-61-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1168-63-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1168-64-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1168-65-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1168-66-0x000000000045810E-mapping.dmp
C:\Users\Admin\AppData\Local\Temp\csrsss.exe
| MD5 | 278edbd499374bf73621f8c1f969d894 |
| SHA1 | a81170af14747781c5f5f51bb1215893136f0bc0 |
| SHA256 | c6999b9f79932c3b4f1c461a69d9dc8dc301d6a155abc33efe1b6e9e4a038391 |
| SHA512 | 93b0b5c3324bd2df83310f96d34c9176c94d2d676766599c1af33c98ba1efe63187056671f7c6f80c956e5bd0a725f108804021ad93326286bb9c3a96f6550b9 |
memory/1168-69-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1168-71-0x0000000000400000-0x000000000045E000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\csrsss.exe
| MD5 | 278edbd499374bf73621f8c1f969d894 |
| SHA1 | a81170af14747781c5f5f51bb1215893136f0bc0 |
| SHA256 | c6999b9f79932c3b4f1c461a69d9dc8dc301d6a155abc33efe1b6e9e4a038391 |
| SHA512 | 93b0b5c3324bd2df83310f96d34c9176c94d2d676766599c1af33c98ba1efe63187056671f7c6f80c956e5bd0a725f108804021ad93326286bb9c3a96f6550b9 |
memory/1168-74-0x0000000074A50000-0x0000000074FFB000-memory.dmp
memory/1912-75-0x0000000074A50000-0x0000000074FFB000-memory.dmp
memory/1708-76-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\Temp\Microsoft\csrsss.exe.bat
| MD5 | f20919d9be671888ac2a4d7a0c3aa4ae |
| SHA1 | 1a1c34123521d4c7ad2a45508eee464020dbf1bb |
| SHA256 | fd14bcdf0e40636dfbdcecf19d26c5177f4bd8ac28e2a16930b9e0c6e31de43b |
| SHA512 | 38c4e8665c5e37556ba6463a9abcda6922aff537796adaccfd9a0bb6c716776bdf38c2873ecdfb91260d012089e7aa44715ee660873dc901593054498e926343 |
memory/1460-78-0x0000000000000000-mapping.dmp
memory/1912-79-0x0000000074A50000-0x0000000074FFB000-memory.dmp
memory/1168-80-0x0000000074A50000-0x0000000074FFB000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2022-06-25 11:25
Reported
2022-06-25 13:31
Platform
win10v2004-20220414-en
Max time kernel
144s
Max time network
157s
Command Line
Signatures
Imminent RAT
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\csrsss.exe.lnk | C:\Users\Admin\AppData\Local\Temp\644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c.exe | N/A |
Drops desktop.ini file(s)
| Description | Indicator | Process | Target |
| File created | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
| File opened for modification | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2912 set thread context of 3428 | N/A | C:\Users\Admin\AppData\Local\Temp\644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c.exe | C:\Users\Admin\AppData\Local\Temp\csrsss.exe |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\assembly | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
| File created | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
| File opened for modification | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
Enumerates physical storage devices
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\timeout.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
| Token: 33 | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\csrsss.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c.exe
"C:\Users\Admin\AppData\Local\Temp\644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c.exe"
C:\Windows\SysWOW64\cmd.exe
"cmd.exe"
C:\Windows\SysWOW64\reg.exe
reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\Microsoft\csrsss.exe.lnk " /f
C:\Users\Admin\AppData\Local\Temp\csrsss.exe
"C:\Users\Admin\AppData\Local\Temp\csrsss.exe"
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\Microsoft\csrsss.exe.bat
C:\Windows\SysWOW64\timeout.exe
timeout /t 300
Network
| Country | Destination | Domain | Proto |
| US | 8.253.208.112:80 | tcp | |
| US | 8.8.8.8:53 | auxwin.duckdns.org | udp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| US | 13.107.21.200:443 | tcp | |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| US | 52.168.117.170:443 | tcp | |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| US | 8.253.208.112:80 | tcp | |
| US | 8.253.208.112:80 | tcp | |
| US | 8.253.208.112:80 | tcp | |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| US | 8.8.8.8:53 | auxwin.duckdns.org | udp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
| US | 8.8.8.8:53 | auxwin.duckdns.org | udp |
| RS | 109.92.38.96:8284 | auxwin.duckdns.org | tcp |
Files
memory/2912-130-0x0000000074690000-0x0000000074C41000-memory.dmp
memory/1612-131-0x0000000000000000-mapping.dmp
memory/1272-132-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\Temp\Microsoft\csrsss.exe
| MD5 | bf41f994a287a74be5fa1b9bbef61e25 |
| SHA1 | 6dad025caf3ab68aeba93b079356eeb9edc36d16 |
| SHA256 | 644f92c3109e62bd989145af1f0879ef3b3fccc28f98d443a71bf8c52d46709c |
| SHA512 | ccc28c30cb0cc380aecf6067b66312e423341dd46112652b69137dd333f4683dfa779c2509e97f7c39a61f5e7ee647ff04016407e5a98a3738b5cf2c6d946294 |
memory/3428-134-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\Temp\csrsss.exe
| MD5 | a64daca3cfbcd039df3ec29d3eddd001 |
| SHA1 | eee8b2573f71e8d5c3ee7e53af3e6772e090d0f3 |
| SHA256 | 403752009f29381d5e4036b8be94589c89188f9ce8ef5f86959eaaada019ed36 |
| SHA512 | b6fe2d0ae3fcd4442579ecf10d498d61e0f042813c8fc4be8019da77d849cfcf0b168507139a1b5697227c272de9091788f8e03cf1ce13d5b5077568cfa6a479 |
C:\Users\Admin\AppData\Local\Temp\csrsss.exe
| MD5 | a64daca3cfbcd039df3ec29d3eddd001 |
| SHA1 | eee8b2573f71e8d5c3ee7e53af3e6772e090d0f3 |
| SHA256 | 403752009f29381d5e4036b8be94589c89188f9ce8ef5f86959eaaada019ed36 |
| SHA512 | b6fe2d0ae3fcd4442579ecf10d498d61e0f042813c8fc4be8019da77d849cfcf0b168507139a1b5697227c272de9091788f8e03cf1ce13d5b5077568cfa6a479 |
memory/4536-138-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\Temp\Microsoft\csrsss.exe.bat
| MD5 | f20919d9be671888ac2a4d7a0c3aa4ae |
| SHA1 | 1a1c34123521d4c7ad2a45508eee464020dbf1bb |
| SHA256 | fd14bcdf0e40636dfbdcecf19d26c5177f4bd8ac28e2a16930b9e0c6e31de43b |
| SHA512 | 38c4e8665c5e37556ba6463a9abcda6922aff537796adaccfd9a0bb6c716776bdf38c2873ecdfb91260d012089e7aa44715ee660873dc901593054498e926343 |
memory/4508-140-0x0000000000000000-mapping.dmp
memory/3428-141-0x0000000074690000-0x0000000074C41000-memory.dmp
memory/2912-142-0x0000000074690000-0x0000000074C41000-memory.dmp
memory/2912-143-0x0000000074690000-0x0000000074C41000-memory.dmp
memory/3428-144-0x0000000074690000-0x0000000074C41000-memory.dmp