Analysis Overview
SHA256
ecf69f07a54b5b9a23918992a39edb577f3b2586e01ccf39010e2415aa41bba3
Threat Level: Known bad
The file SkermEXEC.exe was found to be: Known bad.
Malicious Activity Summary
RedLine
Redline family
RedLine payload
Drops file in Windows directory
Unsigned PE
Suspicious use of SendNotifyMessage
Suspicious use of FindShellTrayWindow
Checks SCSI registry key(s)
Kills process with taskkill
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-22 20:49
Signatures
RedLine payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Redline family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-22 20:49
Reported
2024-05-22 20:52
Platform
win10-20240404-en
Max time kernel
149s
Max time network
136s
Command Line
Signatures
RedLine
RedLine payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\rescache\_merged\4183903823\2290032291.pri | C:\Windows\system32\taskmgr.exe | N/A |
| File created | C:\Windows\rescache\_merged\1601268389\715946058.pri | C:\Windows\system32\taskmgr.exe | N/A |
Checks SCSI registry key(s)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000 | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A | C:\Windows\system32\taskmgr.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName | C:\Windows\system32\taskmgr.exe | N/A |
Kills process with taskkill
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\SkermEXEC.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeSystemProfilePrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeCreateGlobalPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 388 wrote to memory of 3992 | N/A | C:\Users\Admin\AppData\Local\Temp\SkermEXEC.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 388 wrote to memory of 3992 | N/A | C:\Users\Admin\AppData\Local\Temp\SkermEXEC.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 388 wrote to memory of 3992 | N/A | C:\Users\Admin\AppData\Local\Temp\SkermEXEC.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 3992 wrote to memory of 4672 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 3992 wrote to memory of 4672 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 3992 wrote to memory of 4672 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 3992 wrote to memory of 4128 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\choice.exe |
| PID 3992 wrote to memory of 4128 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\choice.exe |
| PID 3992 wrote to memory of 4128 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\choice.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\SkermEXEC.exe
"C:\Users\Admin\AppData\Local\Temp\SkermEXEC.exe"
C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /0
C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C taskkill /F /PID 388 && choice /C Y /N /D Y /T 3 & Del "C:\Users\Admin\AppData\Local\Temp\SkermEXEC.exe"
C:\Windows\SysWOW64\taskkill.exe
taskkill /F /PID 388
C:\Windows\SysWOW64\choice.exe
choice /C Y /N /D Y /T 3
Network
| Country | Destination | Domain | Proto |
| N/A | 192.168.68.100:6677 | tcp | |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.173.189.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
Files
memory/388-0-0x0000000073EDE000-0x0000000073EDF000-memory.dmp
memory/388-1-0x0000000000C10000-0x0000000000C3A000-memory.dmp
memory/388-2-0x0000000073ED0000-0x00000000745BE000-memory.dmp
memory/388-3-0x0000000005B60000-0x0000000006166000-memory.dmp
memory/388-4-0x0000000005450000-0x0000000005462000-memory.dmp
memory/388-5-0x00000000054B0000-0x00000000054EE000-memory.dmp
memory/388-6-0x00000000054F0000-0x000000000553B000-memory.dmp
memory/388-7-0x0000000005770000-0x000000000587A000-memory.dmp
memory/388-13-0x0000000073EDE000-0x0000000073EDF000-memory.dmp
memory/388-14-0x0000000073ED0000-0x00000000745BE000-memory.dmp