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Analysis
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max time kernel
150s -
max time network
146s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
02/02/2024, 02:11
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
8845ee4284fd4956fd83c87df37ea55e.exe
Resource
win7-20231215-en
windows7-x64
13 signatures
150 seconds
General
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Target
8845ee4284fd4956fd83c87df37ea55e.exe
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Size
100KB
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MD5
8845ee4284fd4956fd83c87df37ea55e
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SHA1
958896222f677bbc7960943e6df81b7b3b58e71e
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SHA256
3c1295810d131e28d9a12e33aa657da4b62cdc772fa00bc8c6eace33ce1e0192
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SHA512
94da99500102ea9ad0ec6012e0fbb43fd4968c2fcafeaf2c4b3988a23eb4410b50c3d8c58a1fe5d80b69315af2ee7c4c98dcfb655837741e194d87af03bb8fe6
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SSDEEP
3072:4Vkf6S24thpSNr4LYRL1PA42FKeDGVk8jwaaHw7Koj4rDM9P:4qS6E9eYR5PxS0
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,C:\\Users\\Admin\\AppData\\Local\\ulavlklb\\drrivnur.exe" svchost.exe -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" svchost.exe -
Checks BIOS information in registry 2 TTPs 1 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion svchost.exe -
Drops startup file 2 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\drrivnur.exe svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\drrivnur.exe svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 2024 uwpdxpwxpybpmubc.exe -
Loads dropped DLL 5 IoCs
pid Process 816 8845ee4284fd4956fd83c87df37ea55e.exe 816 8845ee4284fd4956fd83c87df37ea55e.exe 816 8845ee4284fd4956fd83c87df37ea55e.exe 816 8845ee4284fd4956fd83c87df37ea55e.exe 816 8845ee4284fd4956fd83c87df37ea55e.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Windows\CurrentVersion\Run\DrrIvnur = "C:\\Users\\Admin\\AppData\\Local\\ulavlklb\\drrivnur.exe" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe 2708 svchost.exe -
Suspicious behavior: LoadsDriver 1 IoCs
pid Process 464 Process not Found -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeSecurityPrivilege 816 8845ee4284fd4956fd83c87df37ea55e.exe Token: SeDebugPrivilege 816 8845ee4284fd4956fd83c87df37ea55e.exe Token: SeSecurityPrivilege 2744 svchost.exe Token: SeSecurityPrivilege 2708 svchost.exe Token: SeDebugPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeSecurityPrivilege 2024 uwpdxpwxpybpmubc.exe Token: SeLoadDriverPrivilege 2024 uwpdxpwxpybpmubc.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe Token: SeBackupPrivilege 2708 svchost.exe Token: SeRestorePrivilege 2708 svchost.exe -
Suspicious use of WriteProcessMemory 24 IoCs
description pid Process procid_target PID 816 wrote to memory of 2744 816 8845ee4284fd4956fd83c87df37ea55e.exe 28 PID 816 wrote to memory of 2744 816 8845ee4284fd4956fd83c87df37ea55e.exe 28 PID 816 wrote to memory of 2744 816 8845ee4284fd4956fd83c87df37ea55e.exe 28 PID 816 wrote to memory of 2744 816 8845ee4284fd4956fd83c87df37ea55e.exe 28 PID 816 wrote to memory of 2744 816 8845ee4284fd4956fd83c87df37ea55e.exe 28 PID 816 wrote to memory of 2744 816 8845ee4284fd4956fd83c87df37ea55e.exe 28 PID 816 wrote to memory of 2744 816 8845ee4284fd4956fd83c87df37ea55e.exe 28 PID 816 wrote to memory of 2744 816 8845ee4284fd4956fd83c87df37ea55e.exe 28 PID 816 wrote to memory of 2744 816 8845ee4284fd4956fd83c87df37ea55e.exe 28 PID 816 wrote to memory of 2744 816 8845ee4284fd4956fd83c87df37ea55e.exe 28 PID 816 wrote to memory of 2708 816 8845ee4284fd4956fd83c87df37ea55e.exe 29 PID 816 wrote to memory of 2708 816 8845ee4284fd4956fd83c87df37ea55e.exe 29 PID 816 wrote to memory of 2708 816 8845ee4284fd4956fd83c87df37ea55e.exe 29 PID 816 wrote to memory of 2708 816 8845ee4284fd4956fd83c87df37ea55e.exe 29 PID 816 wrote to memory of 2708 816 8845ee4284fd4956fd83c87df37ea55e.exe 29 PID 816 wrote to memory of 2708 816 8845ee4284fd4956fd83c87df37ea55e.exe 29 PID 816 wrote to memory of 2708 816 8845ee4284fd4956fd83c87df37ea55e.exe 29 PID 816 wrote to memory of 2708 816 8845ee4284fd4956fd83c87df37ea55e.exe 29 PID 816 wrote to memory of 2708 816 8845ee4284fd4956fd83c87df37ea55e.exe 29 PID 816 wrote to memory of 2708 816 8845ee4284fd4956fd83c87df37ea55e.exe 29 PID 816 wrote to memory of 2024 816 8845ee4284fd4956fd83c87df37ea55e.exe 30 PID 816 wrote to memory of 2024 816 8845ee4284fd4956fd83c87df37ea55e.exe 30 PID 816 wrote to memory of 2024 816 8845ee4284fd4956fd83c87df37ea55e.exe 30 PID 816 wrote to memory of 2024 816 8845ee4284fd4956fd83c87df37ea55e.exe 30
Processes
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C:\Users\Admin\AppData\Local\Temp\8845ee4284fd4956fd83c87df37ea55e.exe"C:\Users\Admin\AppData\Local\Temp\8845ee4284fd4956fd83c87df37ea55e.exe"1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:816 -
C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2744
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C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe2⤵
- Modifies WinLogon for persistence
- UAC bypass
- Checks BIOS information in registry
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2708
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C:\Users\Admin\AppData\Local\Temp\uwpdxpwxpybpmubc.exe"C:\Users\Admin\AppData\Local\Temp\uwpdxpwxpybpmubc.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2024
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Replay Monitor
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Downloads
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Filesize
100KB
MD58845ee4284fd4956fd83c87df37ea55e
SHA1958896222f677bbc7960943e6df81b7b3b58e71e
SHA2563c1295810d131e28d9a12e33aa657da4b62cdc772fa00bc8c6eace33ce1e0192
SHA51294da99500102ea9ad0ec6012e0fbb43fd4968c2fcafeaf2c4b3988a23eb4410b50c3d8c58a1fe5d80b69315af2ee7c4c98dcfb655837741e194d87af03bb8fe6