Analysis
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max time kernel
150s -
max time network
150s -
platform
windows11-21h2_x64 -
resource
win11-20240419-en -
resource tags
arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system -
submitted
27/04/2024, 20:14
Behavioral task
behavioral1
Sample
CompatibilityCheck.exe
Resource
win11-20240419-en
windows11-21h2-x64
11 signatures
150 seconds
General
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Target
CompatibilityCheck.exe
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Size
37KB
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MD5
0c84829a79c06e88510607526990391e
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SHA1
63970a42f5b779c1f0f8d95d493317917b0bd46d
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SHA256
6f9b61794c9169a8860fb74e2cc0253b0bc283327b6485f799265f702a67c921
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SHA512
85638191fee2b456e601487aff23bc5dccbfd24e74970e5f1d8fbdad633a3d31208887f682debf1fd2abcec6e36c50e74b6da30c660dfa0bc0471e7ef8c98f40
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SSDEEP
384:p6hCpb2iKrL4y4Oo49qylTKbWstSXHasW4TkrAF+rMRTyN/0L+EcoinblneHQM3Y:oCdi/s89ZlTKtSK94YrM+rMRa8NuS2t
Score
8/10
Malware Config
Signatures
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Modifies Windows Firewall 2 TTPs 1 IoCs
pid Process 5024 netsh.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e14109296e01cf24bb9b7f72f64c4cb3.exe COM Surrogate.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e14109296e01cf24bb9b7f72f64c4cb3.exe COM Surrogate.exe -
Executes dropped EXE 1 IoCs
pid Process 888 COM Surrogate.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1856190483-1022094809-400023910-1000\Software\Microsoft\Windows\CurrentVersion\Run\e14109296e01cf24bb9b7f72f64c4cb3 = "\"C:\\ProgramData\\COM Surrogate.exe\" .." COM Surrogate.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\e14109296e01cf24bb9b7f72f64c4cb3 = "\"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).
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Kills process with taskkill 1 IoCs
pid Process 920 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe 888 COM Surrogate.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 888 COM Surrogate.exe -
Suspicious use of AdjustPrivilegeToken 36 IoCs
description pid Process Token: SeDebugPrivilege 888 COM Surrogate.exe Token: SeDebugPrivilege 920 taskkill.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe Token: 33 888 COM Surrogate.exe Token: SeIncBasePriorityPrivilege 888 COM Surrogate.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 3176 wrote to memory of 888 3176 CompatibilityCheck.exe 81 PID 3176 wrote to memory of 888 3176 CompatibilityCheck.exe 81 PID 3176 wrote to memory of 888 3176 CompatibilityCheck.exe 81 PID 888 wrote to memory of 5024 888 COM Surrogate.exe 82 PID 888 wrote to memory of 5024 888 COM Surrogate.exe 82 PID 888 wrote to memory of 5024 888 COM Surrogate.exe 82 PID 888 wrote to memory of 920 888 COM Surrogate.exe 84 PID 888 wrote to memory of 920 888 COM Surrogate.exe 84 PID 888 wrote to memory of 920 888 COM Surrogate.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\CompatibilityCheck.exe"C:\Users\Admin\AppData\Local\Temp\CompatibilityCheck.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:3176 -
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
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:888 -
C:\Windows\SysWOW64\netsh.exenetsh firewall add allowedprogram "C:\ProgramData\COM Surrogate.exe" "COM Surrogate.exe" ENABLE3⤵
- Modifies Windows Firewall
PID:5024
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C:\Windows\SysWOW64\taskkill.exetaskkill /F /IM SecHealthUI.exe3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:920
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Replay Monitor
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Downloads
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Filesize
37KB
MD50c84829a79c06e88510607526990391e
SHA163970a42f5b779c1f0f8d95d493317917b0bd46d
SHA2566f9b61794c9169a8860fb74e2cc0253b0bc283327b6485f799265f702a67c921
SHA51285638191fee2b456e601487aff23bc5dccbfd24e74970e5f1d8fbdad633a3d31208887f682debf1fd2abcec6e36c50e74b6da30c660dfa0bc0471e7ef8c98f40