Analysis Overview
SHA256
7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e
Threat Level: Known bad
The file 7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e was found to be: Known bad.
Malicious Activity Summary
Luminosity
Modifies WinLogon for persistence
Executes dropped EXE
Checks computer location settings
Loads dropped DLL
Adds Run key to start application
Suspicious use of SetThreadContext
Drops file in System32 directory
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: RenamesItself
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-11-27 02:11
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-11-27 02:11
Reported
2022-11-27 20:46
Platform
win7-20220812-en
Max time kernel
152s
Max time network
154s
Command Line
Signatures
Luminosity
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,\"C:\\Windows\\system32\\clientsvr.exe\"" | C:\ProgramData\970228\csrd.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\ProgramData\\970228\\csrd.exe\"" | C:\ProgramData\970228\csrd.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\970228\csrd.exe | N/A |
| N/A | N/A | C:\ProgramData\970228\csrd.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\csrdLink = "\"C:\\ProgramData\\970228\\csrd.exe\"" | C:\ProgramData\970228\csrd.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\clientsvr.exe | C:\ProgramData\970228\csrd.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\clientsvr.exe | C:\ProgramData\970228\csrd.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1996 set thread context of 1744 | N/A | C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe | C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe |
| PID 1156 set thread context of 1764 | N/A | C:\ProgramData\970228\csrd.exe | C:\ProgramData\970228\csrd.exe |
Enumerates physical storage devices
Suspicious behavior: RenamesItself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\ProgramData\970228\csrd.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\970228\csrd.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe
"C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe"
C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe
"C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe"
C:\ProgramData\970228\csrd.exe
"C:\ProgramData\970228\csrd.exe"
C:\ProgramData\970228\csrd.exe
"C:\ProgramData\970228\csrd.exe"
Network
| Country | Destination | Domain | Proto |
| N/A | 212.7.208.68:6318 | tcp | |
| N/A | 212.7.208.68:6318 | tcp | |
| N/A | 212.7.208.68:6318 | tcp | |
| N/A | 212.7.208.68:6318 | tcp |
Files
memory/1996-54-0x0000000075281000-0x0000000075283000-memory.dmp
memory/1996-55-0x0000000074270000-0x000000007481B000-memory.dmp
memory/1744-56-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1744-57-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1744-59-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1744-62-0x0000000000443CAE-mapping.dmp
memory/1744-61-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1744-64-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1744-66-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1744-68-0x0000000074270000-0x000000007481B000-memory.dmp
\ProgramData\970228\csrd.exe
| MD5 | d26216b074c217894eb57c1413983c17 |
| SHA1 | 1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79 |
| SHA256 | 7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e |
| SHA512 | 19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5 |
\ProgramData\970228\csrd.exe
| MD5 | d26216b074c217894eb57c1413983c17 |
| SHA1 | 1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79 |
| SHA256 | 7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e |
| SHA512 | 19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5 |
memory/1156-71-0x0000000000000000-mapping.dmp
C:\ProgramData\970228\csrd.exe
| MD5 | d26216b074c217894eb57c1413983c17 |
| SHA1 | 1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79 |
| SHA256 | 7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e |
| SHA512 | 19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5 |
C:\ProgramData\970228\csrd.exe
| MD5 | d26216b074c217894eb57c1413983c17 |
| SHA1 | 1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79 |
| SHA256 | 7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e |
| SHA512 | 19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5 |
memory/1996-75-0x0000000074270000-0x000000007481B000-memory.dmp
memory/1156-76-0x0000000074270000-0x000000007481B000-memory.dmp
memory/1764-83-0x0000000000443CAE-mapping.dmp
C:\ProgramData\970228\csrd.exe
| MD5 | d26216b074c217894eb57c1413983c17 |
| SHA1 | 1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79 |
| SHA256 | 7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e |
| SHA512 | 19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5 |
memory/1744-90-0x0000000074270000-0x000000007481B000-memory.dmp
memory/1764-91-0x0000000074270000-0x000000007481B000-memory.dmp
memory/1156-92-0x0000000074270000-0x000000007481B000-memory.dmp
memory/1744-93-0x0000000074270000-0x000000007481B000-memory.dmp
memory/1764-94-0x0000000074270000-0x000000007481B000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2022-11-27 02:11
Reported
2022-11-27 20:47
Platform
win10v2004-20221111-en
Max time kernel
201s
Max time network
204s
Command Line
Signatures
Luminosity
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,\"C:\\Windows\\system32\\clientsvr.exe\"" | C:\ProgramData\954820\csrd.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\ProgramData\\954820\\csrd.exe\"" | C:\ProgramData\954820\csrd.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\954820\csrd.exe | N/A |
| N/A | N/A | C:\ProgramData\954820\csrd.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\csrdLink = "\"C:\\ProgramData\\954820\\csrd.exe\"" | C:\ProgramData\954820\csrd.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\clientsvr.exe | C:\ProgramData\954820\csrd.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\clientsvr.exe | C:\ProgramData\954820\csrd.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1748 set thread context of 3664 | N/A | C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe | C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe |
| PID 4692 set thread context of 1784 | N/A | C:\ProgramData\954820\csrd.exe | C:\ProgramData\954820\csrd.exe |
Enumerates physical storage devices
Suspicious behavior: RenamesItself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\ProgramData\954820\csrd.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\954820\csrd.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe
"C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe"
C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe
"C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe"
C:\ProgramData\954820\csrd.exe
"C:\ProgramData\954820\csrd.exe"
C:\ProgramData\954820\csrd.exe
"C:\ProgramData\954820\csrd.exe"
Network
| Country | Destination | Domain | Proto |
| N/A | 93.184.221.240:80 | tcp | |
| N/A | 93.184.221.240:80 | tcp | |
| N/A | 40.74.98.195:443 | tcp | |
| N/A | 104.80.225.205:443 | tcp | |
| N/A | 93.184.221.240:80 | tcp | |
| N/A | 93.184.221.240:80 | tcp | |
| N/A | 93.184.221.240:80 | tcp | |
| N/A | 8.8.8.8:53 | 226.101.242.52.in-addr.arpa | udp |
| N/A | 8.8.8.8:53 | 9.9.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.0.2.0.0.0.0.2.0.1.3.0.6.2.ip6.arpa | udp |
| N/A | 212.7.208.68:6318 | tcp | |
| N/A | 212.7.208.68:6318 | tcp | |
| N/A | 212.7.208.68:6318 | tcp |
Files
memory/1748-132-0x00000000753F0000-0x00000000759A1000-memory.dmp
memory/1748-133-0x00000000753F0000-0x00000000759A1000-memory.dmp
memory/3664-134-0x0000000000000000-mapping.dmp
memory/3664-135-0x0000000000400000-0x0000000000448000-memory.dmp
memory/3664-136-0x00000000753F0000-0x00000000759A1000-memory.dmp
memory/4692-137-0x0000000000000000-mapping.dmp
C:\ProgramData\954820\csrd.exe
| MD5 | d26216b074c217894eb57c1413983c17 |
| SHA1 | 1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79 |
| SHA256 | 7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e |
| SHA512 | 19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5 |
C:\ProgramData\954820\csrd.exe
| MD5 | d26216b074c217894eb57c1413983c17 |
| SHA1 | 1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79 |
| SHA256 | 7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e |
| SHA512 | 19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5 |
memory/4692-140-0x00000000753F0000-0x00000000759A1000-memory.dmp
memory/3664-141-0x00000000753F0000-0x00000000759A1000-memory.dmp
memory/4692-142-0x00000000753F0000-0x00000000759A1000-memory.dmp
memory/1784-143-0x0000000000000000-mapping.dmp
C:\ProgramData\954820\csrd.exe
| MD5 | d26216b074c217894eb57c1413983c17 |
| SHA1 | 1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79 |
| SHA256 | 7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e |
| SHA512 | 19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5 |
memory/1784-146-0x00000000753F0000-0x00000000759A1000-memory.dmp
memory/1784-147-0x00000000753F0000-0x00000000759A1000-memory.dmp
memory/3664-148-0x00000000753F0000-0x00000000759A1000-memory.dmp