Analysis Overview
SHA256
17e75d26155509f37f0309982ad4ed831df19bb3b61b4b10851ce520487619e6
Threat Level: Shows suspicious behavior
The file b35df2b5bfd716d04d9e73f29d33cfb4 was found to be: Shows suspicious behavior.
Malicious Activity Summary
ASPack v2.12-2.42
Adds Run key to start application
Drops file in System32 directory
Drops file in Windows directory
Unsigned PE
Enumerates physical storage devices
Creates scheduled task(s)
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-05 00:51
Signatures
ASPack v2.12-2.42
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-05 00:51
Reported
2024-03-05 00:54
Platform
win7-20240221-en
Max time kernel
142s
Max time network
121s
Command Line
Signatures
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\systen32 = "C:\\Windows\\system32\\systen32.exe" | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\systen32.exe | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\systen32.exe | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\reg_88448888.txt | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1640 wrote to memory of 1856 | N/A | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | C:\Windows\SysWOW64\schtasks.exe |
| PID 1640 wrote to memory of 1856 | N/A | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | C:\Windows\SysWOW64\schtasks.exe |
| PID 1640 wrote to memory of 1856 | N/A | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | C:\Windows\SysWOW64\schtasks.exe |
| PID 1640 wrote to memory of 1856 | N/A | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | C:\Windows\SysWOW64\schtasks.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe
"C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe"
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn startt /tr c:\start.bat /sc onstart /ru system
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | gsmtp185.google.com | udp |
Files
memory/1640-0-0x0000000000230000-0x0000000000231000-memory.dmp
memory/1640-3-0x0000000000400000-0x000000000231A000-memory.dmp
memory/1640-4-0x0000000000400000-0x000000000231A000-memory.dmp
memory/1640-5-0x0000000000230000-0x0000000000231000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-05 00:51
Reported
2024-03-05 00:54
Platform
win10v2004-20240226-en
Max time kernel
142s
Max time network
152s
Command Line
Signatures
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\systen32 = "C:\\Windows\\system32\\systen32.exe" | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\systen32.exe | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\systen32.exe | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\reg_88448888.txt | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4964 wrote to memory of 4800 | N/A | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | C:\Windows\SysWOW64\schtasks.exe |
| PID 4964 wrote to memory of 4800 | N/A | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | C:\Windows\SysWOW64\schtasks.exe |
| PID 4964 wrote to memory of 4800 | N/A | C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe | C:\Windows\SysWOW64\schtasks.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe
"C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe"
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn startt /tr c:\start.bat /sc onstart /ru system
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | gsmtp185.google.com | udp |
| US | 8.8.8.8:53 | 17.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 173.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| NL | 52.142.223.178:80 | tcp | |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.241.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 119.110.54.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 176.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 32.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 209.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 211.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.204.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
Files
memory/4964-0-0x00000000040E0000-0x00000000040E1000-memory.dmp
memory/4964-3-0x0000000000400000-0x000000000231A000-memory.dmp
memory/4964-5-0x00000000040E0000-0x00000000040E1000-memory.dmp