Analysis Overview
SHA256
3fe6c89a0fdadaf3172be13af4fad92f5f3e08c3bde723c8b6957ac68a3503ae
Threat Level: Known bad
The file chainbrowserSession - Copie.exe was found to be: Known bad.
Malicious Activity Summary
Dcrat family
Process spawned unexpected child process
DcRat
DCRat payload
DCRat payload
Executes dropped EXE
Drops file in Program Files directory
Drops file in Windows directory
Unsigned PE
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: GetForegroundWindowSpam
Creates scheduled task(s)
Uses Task Scheduler COM API
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-15 18:38
Signatures
DCRat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Dcrat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-15 18:38
Reported
2024-05-15 19:31
Platform
win10-20240404-en
Max time kernel
1159s
Max time network
1198s
Command Line
Signatures
DcRat
Process spawned unexpected child process
| Description | Indicator | Process | Target |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe |
DCRat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe | N/A |
| N/A | N/A | C:\Windows\security\EDP\Logs\InstallAgent.exe | N/A |
| N/A | N/A | C:\Recovery\WindowsRE\sysmon.exe | N/A |
| N/A | N/A | C:\Program Files\Common Files\DESIGNER\lsass.exe | N/A |
| N/A | N/A | C:\Windows\security\EDP\Logs\InstallAgent.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Windows NT\sppsvc.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Reference Assemblies\Microsoft\System.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe | N/A |
| N/A | N/A | C:\Recovery\WindowsRE\sysmon.exe | N/A |
| N/A | N/A | C:\Program Files\Common Files\DESIGNER\lsass.exe | N/A |
| N/A | N/A | C:\Windows\security\EDP\Logs\InstallAgent.exe | N/A |
| N/A | N/A | C:\Recovery\WindowsRE\sysmon.exe | N/A |
| N/A | N/A | C:\Program Files\Common Files\DESIGNER\lsass.exe | N/A |
| N/A | N/A | C:\Windows\security\EDP\Logs\InstallAgent.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Windows NT\sppsvc.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Reference Assemblies\Microsoft\System.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\Windows NT\sppsvc.exe | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | N/A |
| File created | C:\Program Files\Common Files\DESIGNER\lsass.exe | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | N/A |
| File created | C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | N/A |
| File created | C:\Program Files (x86)\Windows Defender\ja-JP\69ddcba757bf72 | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | N/A |
| File created | C:\Program Files\Common Files\DESIGNER\6203df4a6bafc7 | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | N/A |
| File created | C:\Program Files (x86)\Reference Assemblies\Microsoft\System.exe | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | N/A |
| File created | C:\Program Files (x86)\Reference Assemblies\Microsoft\27d1bcfc3c54e0 | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | N/A |
| File opened for modification | C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | N/A |
| File created | C:\Program Files (x86)\Windows NT\0a1fd5f707cd16 | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\security\EDP\Logs\InstallAgent.exe | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | N/A |
| File created | C:\Windows\security\EDP\Logs\200f98429d280b | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 588 wrote to memory of 3140 | N/A | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe |
| PID 588 wrote to memory of 3140 | N/A | C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe | C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe
"C:\Users\Admin\AppData\Local\Temp\chainbrowserSession - Copie.exe"
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "InstallAgentI" /sc MINUTE /mo 5 /tr "'C:\Windows\security\EDP\Logs\InstallAgent.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "InstallAgent" /sc ONLOGON /tr "'C:\Windows\security\EDP\Logs\InstallAgent.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "InstallAgentI" /sc MINUTE /mo 8 /tr "'C:\Windows\security\EDP\Logs\InstallAgent.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\sysmon.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sysmon.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\sysmon.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows NT\sppsvc.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\sppsvc.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows NT\sppsvc.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Program Files\Common Files\DESIGNER\lsass.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\Common Files\DESIGNER\lsass.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Program Files\Common Files\DESIGNER\lsass.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\System.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\System.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\System.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\System.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\System.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\System.exe'" /rl HIGHEST /f
C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe
"C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe"
C:\Windows\security\EDP\Logs\InstallAgent.exe
C:\Windows\security\EDP\Logs\InstallAgent.exe
C:\Recovery\WindowsRE\sysmon.exe
C:\Recovery\WindowsRE\sysmon.exe
C:\Program Files\Common Files\DESIGNER\lsass.exe
"C:\Program Files\Common Files\DESIGNER\lsass.exe"
C:\Windows\security\EDP\Logs\InstallAgent.exe
C:\Windows\security\EDP\Logs\InstallAgent.exe
C:\Program Files (x86)\Windows NT\sppsvc.exe
"C:\Program Files (x86)\Windows NT\sppsvc.exe"
C:\Program Files (x86)\Reference Assemblies\Microsoft\System.exe
"C:\Program Files (x86)\Reference Assemblies\Microsoft\System.exe"
C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe
"C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe"
C:\Recovery\WindowsRE\sysmon.exe
C:\Recovery\WindowsRE\sysmon.exe
C:\Program Files\Common Files\DESIGNER\lsass.exe
"C:\Program Files\Common Files\DESIGNER\lsass.exe"
C:\Windows\security\EDP\Logs\InstallAgent.exe
C:\Windows\security\EDP\Logs\InstallAgent.exe
C:\Recovery\WindowsRE\sysmon.exe
C:\Recovery\WindowsRE\sysmon.exe
C:\Program Files\Common Files\DESIGNER\lsass.exe
"C:\Program Files\Common Files\DESIGNER\lsass.exe"
C:\Windows\security\EDP\Logs\InstallAgent.exe
C:\Windows\security\EDP\Logs\InstallAgent.exe
C:\Program Files (x86)\Windows NT\sppsvc.exe
"C:\Program Files (x86)\Windows NT\sppsvc.exe"
C:\Program Files (x86)\Reference Assemblies\Microsoft\System.exe
"C:\Program Files (x86)\Reference Assemblies\Microsoft\System.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | a0982800.xsph.ru | udp |
| RU | 141.8.192.126:80 | a0982800.xsph.ru | tcp |
| RU | 141.8.192.126:80 | a0982800.xsph.ru | tcp |
| US | 8.8.8.8:53 | 126.192.8.141.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.236.111.52.in-addr.arpa | udp |
| RU | 141.8.192.126:80 | a0982800.xsph.ru | tcp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 208.143.182.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 79.190.18.2.in-addr.arpa | udp |
| RU | 141.8.192.126:80 | a0982800.xsph.ru | tcp |
| RU | 141.8.192.126:80 | a0982800.xsph.ru | tcp |
Files
memory/588-0-0x00007FFE32143000-0x00007FFE32144000-memory.dmp
memory/588-1-0x0000000000780000-0x0000000000856000-memory.dmp
memory/588-2-0x00007FFE32140000-0x00007FFE32B2C000-memory.dmp
memory/588-22-0x00007FFE32140000-0x00007FFE32B2C000-memory.dmp
C:\Program Files (x86)\Windows Defender\ja-JP\smss.exe
| MD5 | dcd1dbdf7c8bfb9263e5dda02b1bfa79 |
| SHA1 | 0912a5fa7ac74c5e49d72a8a4d6957b063b1d31b |
| SHA256 | 3fe6c89a0fdadaf3172be13af4fad92f5f3e08c3bde723c8b6957ac68a3503ae |
| SHA512 | d368e5f91365af67e46514425e13323f0ad2181d5fc1e790b2b5d17e9cf8c91f46bdf582550517f703b8232f6bd59598b37a41cd637f2d9c192317e8f0134ccc |
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\InstallAgent.exe.log
| MD5 | d63ff49d7c92016feb39812e4db10419 |
| SHA1 | 2307d5e35ca9864ffefc93acf8573ea995ba189b |
| SHA256 | 375076241775962f3edc08a8c72832a00920b427a4f3332528d91d21e909fa12 |
| SHA512 | 00f8c8d0336d6575b956876183199624d6f4d2056f2c0aa633a6f17c516f22ee648062d9bc419254d84c459323e9424f0da8aed9dd4e16c2926e5ba30e797d8a |