Analysis
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max time kernel
45s -
max time network
45s -
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, 20:44
Behavioral task
behavioral1
Sample
Server.exe
Resource
win11-20240419-en
General
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Target
Server.exe
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Size
37KB
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MD5
897835e99a4f3b044a3a788b65e20994
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SHA1
7bf5f2cbb3ac82f0af042d09f61ca02acaf29389
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SHA256
d12b9712632f295c168fc1ec4dd0748b8e885844ef7d806240d6cdb49170ada2
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SHA512
6190a1ed2843419cd44b42ead10c74e6c434156dd1decccf71d34fd1a4be7c7b15ac4099283a089b94b9640cad97720a3833efbff7977fbfdeca6afc7e208432
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SSDEEP
768:/jyDSmUbCv/cPCikrE8sIErM+rMRa8NuYOt:/uDObW03wEwn+gRJNX
Malware Config
Signatures
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Modifies Windows Firewall 2 TTPs 1 IoCs
pid Process 580 netsh.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\6ffa764c880d15862b6efba9985fcc07.exe svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\6ffa764c880d15862b6efba9985fcc07.exe svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 4276 svchost.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-734199974-1358367239-436541239-1000\Software\Microsoft\Windows\CurrentVersion\Run\6ffa764c880d15862b6efba9985fcc07 = "\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\" .." svchost.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\6ffa764c880d15862b6efba9985fcc07 = "\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\" .." svchost.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
flow ioc 1 2.tcp.eu.ngrok.io 5 2.tcp.eu.ngrok.io 8 2.tcp.eu.ngrok.io -
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 svchost.exe File opened for modification C:\autorun.inf svchost.exe File created D:\autorun.inf svchost.exe File created F:\autorun.inf svchost.exe File opened for modification F:\autorun.inf svchost.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 1056 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe 4276 svchost.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 4276 svchost.exe -
Suspicious use of AdjustPrivilegeToken 10 IoCs
description pid Process Token: SeDebugPrivilege 4276 svchost.exe Token: SeDebugPrivilege 1056 taskkill.exe Token: 33 4276 svchost.exe Token: SeIncBasePriorityPrivilege 4276 svchost.exe Token: 33 4276 svchost.exe Token: SeIncBasePriorityPrivilege 4276 svchost.exe Token: 33 4276 svchost.exe Token: SeIncBasePriorityPrivilege 4276 svchost.exe Token: 33 4276 svchost.exe Token: SeIncBasePriorityPrivilege 4276 svchost.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 3932 wrote to memory of 4276 3932 Server.exe 81 PID 3932 wrote to memory of 4276 3932 Server.exe 81 PID 3932 wrote to memory of 4276 3932 Server.exe 81 PID 4276 wrote to memory of 580 4276 svchost.exe 82 PID 4276 wrote to memory of 580 4276 svchost.exe 82 PID 4276 wrote to memory of 580 4276 svchost.exe 82 PID 4276 wrote to memory of 1056 4276 svchost.exe 83 PID 4276 wrote to memory of 1056 4276 svchost.exe 83 PID 4276 wrote to memory of 1056 4276 svchost.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\Server.exe"C:\Users\Admin\AppData\Local\Temp\Server.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:3932 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.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:4276 -
C:\Windows\SysWOW64\netsh.exenetsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\svchost.exe" "svchost.exe" ENABLE3⤵
- Modifies Windows Firewall
PID:580
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C:\Windows\SysWOW64\taskkill.exetaskkill /F /IM Taskmgr.exe3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1056
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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
MD5897835e99a4f3b044a3a788b65e20994
SHA17bf5f2cbb3ac82f0af042d09f61ca02acaf29389
SHA256d12b9712632f295c168fc1ec4dd0748b8e885844ef7d806240d6cdb49170ada2
SHA5126190a1ed2843419cd44b42ead10c74e6c434156dd1decccf71d34fd1a4be7c7b15ac4099283a089b94b9640cad97720a3833efbff7977fbfdeca6afc7e208432