Analysis
-
max time kernel
300s -
max time network
297s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
28-12-2024 17:16
Behavioral task
behavioral1
Sample
fixer.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
14 signatures
300 seconds
General
-
Target
fixer.exe
-
Size
37KB
-
MD5
dcbe24f29c827478c6616974d7f6f83b
-
SHA1
2ae1cf5cad30e2cbdc794aca7ea3b7e7d11dce0f
-
SHA256
cea2e14387453a028cd6a95960bce28ed65c5c61d94b93defc4ddc94482477c1
-
SHA512
64dce5e86ed28db768d1d7cf50faf410ca4569a6da82665b2290ce4e70033d54bc316b952267a012fdf8be8b8b7e5a4eba4636525b2d53fbf37c483337f68fa1
-
SSDEEP
384:0a9SikSvmkO8IV+ytbNX0PrKs2MfErAF+rMRTyN/0L+EcoinblneHQM3epzXLNCi:lfIV1tbNX0elM8rM+rMRa8NuRft
Malware Config
Signatures
-
Modifies Windows Firewall 2 TTPs 1 IoCs
pid Process 3688 netsh.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation fixer.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\79002caee528766a1ca30fecb0f3f819.exe COM Surrogate.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\79002caee528766a1ca30fecb0f3f819.exe COM Surrogate.exe -
Executes dropped EXE 1 IoCs
pid Process 3612 COM Surrogate.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\79002caee528766a1ca30fecb0f3f819 = "\"C:\\ProgramData\\COM Surrogate.exe\" .." COM Surrogate.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\79002caee528766a1ca30fecb0f3f819 = "\"C:\\ProgramData\\COM Surrogate.exe\" .." COM Surrogate.exe -
Drops autorun.inf file 1 TTPs 5 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.
description ioc Process File created C:\autorun.inf COM Surrogate.exe File opened for modification C:\autorun.inf COM Surrogate.exe File created D:\autorun.inf COM Surrogate.exe File created F:\autorun.inf COM Surrogate.exe File opened for modification F:\autorun.inf COM Surrogate.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs
Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.
description ioc Process Key value enumerated \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh netsh.exe Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh netsh.exe Key queried \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh netsh.exe -
System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language taskkill.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language fixer.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language COM Surrogate.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language netsh.exe -
Kills process with taskkill 1 IoCs
pid Process 1620 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe 3612 COM Surrogate.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 3612 COM Surrogate.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeManageVolumePrivilege 1512 svchost.exe Token: SeDebugPrivilege 3612 COM Surrogate.exe Token: SeDebugPrivilege 1620 taskkill.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 3612 COM Surrogate.exe Token: 33 3612 COM Surrogate.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2880 wrote to memory of 3612 2880 fixer.exe 92 PID 2880 wrote to memory of 3612 2880 fixer.exe 92 PID 2880 wrote to memory of 3612 2880 fixer.exe 92 PID 3612 wrote to memory of 3688 3612 COM Surrogate.exe 104 PID 3612 wrote to memory of 3688 3612 COM Surrogate.exe 104 PID 3612 wrote to memory of 3688 3612 COM Surrogate.exe 104 PID 3612 wrote to memory of 1620 3612 COM Surrogate.exe 106 PID 3612 wrote to memory of 1620 3612 COM Surrogate.exe 106 PID 3612 wrote to memory of 1620 3612 COM Surrogate.exe 106
Processes
-
C:\Users\Admin\AppData\Local\Temp\fixer.exe"C:\Users\Admin\AppData\Local\Temp\fixer.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2880 -
C:\ProgramData\COM Surrogate.exe"C:\ProgramData\COM Surrogate.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Drops autorun.inf file
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3612 -
C:\Windows\SysWOW64\netsh.exenetsh firewall add allowedprogram "C:\ProgramData\COM Surrogate.exe" "COM Surrogate.exe" ENABLE3⤵
- Modifies Windows Firewall
- Event Triggered Execution: Netsh Helper DLL
- System Location Discovery: System Language Discovery
PID:3688
-
-
C:\Windows\SysWOW64\taskkill.exetaskkill /F /IM SecHealthUI.exe3⤵
- System Location Discovery: System Language Discovery
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1620
-
-
-
C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k UnistackSvcGroup1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1512
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Netsh Helper DLL
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Netsh Helper DLL
1Defense Evasion
Impair Defenses
1Disable or Modify System Firewall
1Modify Registry
1Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
37KB
MD5dcbe24f29c827478c6616974d7f6f83b
SHA12ae1cf5cad30e2cbdc794aca7ea3b7e7d11dce0f
SHA256cea2e14387453a028cd6a95960bce28ed65c5c61d94b93defc4ddc94482477c1
SHA51264dce5e86ed28db768d1d7cf50faf410ca4569a6da82665b2290ce4e70033d54bc316b952267a012fdf8be8b8b7e5a4eba4636525b2d53fbf37c483337f68fa1