Analysis Overview
SHA256
72a7b8fe4b8401120124e8f9460bfd457fbf76b70a0c057b58ff271c5b2aadca
Threat Level: Known bad
The file AvastSvcZEg.zip was found to be: Known bad.
Malicious Activity Summary
PlugX
Loads dropped DLL
Executes dropped EXE
Enumerates connected drives
Adds Run key to start application
System Location Discovery: System Language Discovery
Unsigned PE
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-10-14 12:59
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-10-14 12:59
Reported
2024-10-14 13:00
Platform
win10v2004-20241007-en
Max time kernel
35s
Max time network
41s
Command Line
Signatures
PlugX
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\AvastSvcZEg = "\"C:\\ProgramData\\AvastSvcZEg\\AvastSvc.exe\" 697" | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\AvastSvcZEg = "\"C:\\ProgramData\\AvastSvcZEg\\AvastSvc.exe\" 697" | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe | N/A |
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\D: | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| File opened (read-only) | \??\F: | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\CLASSES\ms-pu | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\CLASSES\ms-pu\PROXY | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\CLASSES\ms-pu | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000_Classes\ms-pu | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe | N/A |
| Set value (data) | \REGISTRY\MACHINE\SOFTWARE\Classes\ms-pu\CLSID = 38004400420041003200330043004500320032004100430043004300300041000000 | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| N/A | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\ProgramData\AvastSvcZEg\AvastSvc.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3784 wrote to memory of 2192 | N/A | C:\Windows\system32\cmd.exe | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe |
| PID 3784 wrote to memory of 2192 | N/A | C:\Windows\system32\cmd.exe | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe |
| PID 3784 wrote to memory of 2192 | N/A | C:\Windows\system32\cmd.exe | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe |
| PID 2192 wrote to memory of 3956 | N/A | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe | C:\ProgramData\AvastSvcZEg\AvastSvc.exe |
| PID 2192 wrote to memory of 3956 | N/A | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe | C:\ProgramData\AvastSvcZEg\AvastSvc.exe |
| PID 2192 wrote to memory of 3956 | N/A | C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe | C:\ProgramData\AvastSvcZEg\AvastSvc.exe |
Processes
C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe
C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe
C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe
C:\ProgramData\AvastSvcZEg\AvastSvc.exe
C:\ProgramData\AvastSvcZEg\AvastSvc.exe 697
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 140.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| AU | 103.56.53.46:80 | tcp | |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 150.171.27.10:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 10.27.171.150.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| AU | 103.56.53.46:110 | tcp | |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 53.210.109.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 98.117.19.2.in-addr.arpa | udp |
Files
memory/2192-1-0x0000000000CC0000-0x0000000000DC0000-memory.dmp
C:\ProgramData\AvastSvcZEg\AvastSvc.exe
| MD5 | a72036f635cecf0dcb1e9c6f49a8fa5b |
| SHA1 | 049813b955db1dd90952657ae2bd34250153563e |
| SHA256 | 85ca20eeec3400c68a62639a01928a5dab824d2eadf589e5cbfe5a2bc41d9654 |
| SHA512 | e3582e0969361d272c2469ce139ec809b9b0ac98fbc5eb5bb287442aed4c6ba69ed8175b68970751c93730cfaf07b75c3bc5e4e24aeda8f984b24f33bb8e3da2 |
C:\ProgramData\AvastSvcZEg\wsc.dll
| MD5 | 831252e7fa9bd6fa174715647ebce516 |
| SHA1 | bf8c5bf141f0db53000805f2629e6e031d137ceb |
| SHA256 | 6491c646397025bf02709f1bd3025f1622abdc89b550ac38ce6fac938353b954 |
| SHA512 | 0be6e898dcb75b32358bb8c2214e7b9453034ecfbe71d092df75b186a28f97ae7d5737f010b9d9e781c6b4cf3da19ee4a7cf5002604d23c527c55a3f7a0dba04 |
C:\ProgramData\AvastSvcZEg\AvastAuth.dat
| MD5 | 53830fe278811363f93e0906d8b5ce69 |
| SHA1 | b133578af848e10500cc8b943483ed71e86a713a |
| SHA256 | 8ec409c1537e3030405bc8f8353d2605d1e88f1b245554383682f3aa8b5100ec |
| SHA512 | c87497b49d2924be200053495074e16d82fdc875ecdcd231e185479901020c176c2a478c52eea55a9908fe3605ed3d5b2037fa4c83248d4d2bfea45f9f03dc37 |
memory/3956-14-0x0000000000C40000-0x0000000000D40000-memory.dmp
memory/2192-2-0x0000000001070000-0x0000000004CA7000-memory.dmp
memory/3956-13-0x0000000001000000-0x0000000004C37000-memory.dmp
memory/3956-15-0x0000000001000000-0x0000000004C37000-memory.dmp
memory/3956-16-0x0000000001000000-0x0000000004C37000-memory.dmp
memory/3956-17-0x0000000000C40000-0x0000000000D40000-memory.dmp