Analysis Overview
SHA256
e87928fcddf13935c91a0b5577e28efd29bb6a5c1d98e5129dec63e231601053
Threat Level: Known bad
The file mesoc was found to be: Known bad.
Malicious Activity Summary
IcedID, BokBot
Modifies Installed Components in the registry
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Opens file in notepad (likely ransom note)
Suspicious use of WriteProcessMemory
Modifies registry class
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-10-16 15:02
Signatures
Analysis: behavioral2
Detonation Overview
Submitted
2023-10-16 15:02
Reported
2023-10-16 15:06
Platform
win10v2004-20230915-en
Max time kernel
145s
Max time network
151s
Command Line
Signatures
Opens file in notepad (likely ransom note)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\NOTEPAD.EXE | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1436 wrote to memory of 1740 | N/A | C:\Windows\system32\cmd.exe | C:\Windows\system32\rundll32.exe |
| PID 1436 wrote to memory of 1740 | N/A | C:\Windows\system32\cmd.exe | C:\Windows\system32\rundll32.exe |
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\mesoc.dll,#1
C:\Windows\system32\cmd.exe
"C:\Windows\system32\cmd.exe"
C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\GetDeny.txt
C:\Windows\system32\rundll32.exe
rundll32 mesoc.dll scab /k haval462
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.136.104.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 71.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 108.211.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 59.128.231.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 38.148.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 254.5.248.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.173.189.20.in-addr.arpa | udp |
Files
Analysis: behavioral1
Detonation Overview
Submitted
2023-10-16 15:02
Reported
2023-10-16 15:06
Platform
win7-20230831-en
Max time kernel
122s
Max time network
126s
Command Line
Signatures
IcedID, BokBot
Modifies Installed Components in the registry
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-607259312-1573743425-2763420908-1000\Software\Microsoft\Active Setup\Installed Components | C:\Windows\explorer.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-607259312-1573743425-2763420908-1000_Classes\Local Settings | C:\Windows\explorer.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-607259312-1573743425-2763420908-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell | C:\Windows\explorer.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-607259312-1573743425-2763420908-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU | C:\Windows\explorer.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-607259312-1573743425-2763420908-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots | C:\Windows\explorer.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-607259312-1573743425-2763420908-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff | C:\Windows\explorer.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\system32\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\system32\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\system32\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\system32\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\system32\rundll32.exe | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
Suspicious behavior: MapViewOfSection
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\rundll32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2932 wrote to memory of 2988 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\system32\WerFault.exe |
| PID 2932 wrote to memory of 2988 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\system32\WerFault.exe |
| PID 2932 wrote to memory of 2988 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\system32\WerFault.exe |
| PID 2804 wrote to memory of 1896 | N/A | C:\Windows\system32\cmd.exe | C:\Windows\system32\rundll32.exe |
| PID 2804 wrote to memory of 1896 | N/A | C:\Windows\system32\cmd.exe | C:\Windows\system32\rundll32.exe |
| PID 2804 wrote to memory of 1896 | N/A | C:\Windows\system32\cmd.exe | C:\Windows\system32\rundll32.exe |
Uses Task Scheduler COM API
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\mesoc.dll,#1
C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 2932 -s 100
C:\Windows\system32\cmd.exe
"C:\Windows\system32\cmd.exe"
C:\Windows\system32\rundll32.exe
rundll32 mesoc.dll scab /k haval462
C:\Windows\explorer.exe
explorer.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | aptekoagraliy.com | udp |
| US | 188.114.97.0:80 | aptekoagraliy.com | tcp |
Files
memory/1896-0-0x0000000000120000-0x0000000000124000-memory.dmp
memory/1260-1-0x0000000077932000-0x0000000077933000-memory.dmp
memory/1260-2-0x0000000180000000-0x0000000180009000-memory.dmp
memory/1260-9-0x0000000180000000-0x0000000180009000-memory.dmp
memory/1260-10-0x00000000029E0000-0x00000000029E1000-memory.dmp
memory/2316-11-0x0000000004190000-0x0000000004191000-memory.dmp
memory/2316-12-0x0000000004190000-0x0000000004191000-memory.dmp