Analysis
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max time kernel
100s -
max time network
167s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
11-10-2022 09:18
Behavioral task
behavioral1
Sample
4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe
Resource
win10v2004-20220812-en
General
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Target
4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe
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Size
658KB
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MD5
5a85fd1683296db08ee44b7753884fe0
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SHA1
52507f56324779b590e74aa288181016c1e1c7d0
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SHA256
4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88
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SHA512
38dce9afca9a4edefcbce8952b65086576933287795c1311c8eda266c4ead34ad3762a4151735630739daab2162021f1664c741c93c8773d35e7b03d7ce0bbab
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SSDEEP
12288:y9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hK:eZ1xuVVjfFoynPaVBUR8f+kN10EB4
Malware Config
Extracted
darkcomet
loy
2.185.7.134:100
DCMIN_MUTEX-W2NJ681
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InstallPath
DCSCMIN\Realtek Audio Manager.exe
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gencode
4kdoGSd38syN
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install
true
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offline_keylogger
true
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persistence
false
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reg_key
Realtek Audio Manager
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Local\\Temp\\DCSCMIN\\Realtek Audio Manager.exe" 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe -
Executes dropped EXE 1 IoCs
pid Process 368 Realtek Audio Manager.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek Audio Manager = "C:\\Users\\Admin\\AppData\\Local\\Temp\\DCSCMIN\\Realtek Audio Manager.exe" 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeSecurityPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeTakeOwnershipPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeLoadDriverPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeSystemProfilePrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeSystemtimePrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeProfSingleProcessPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeIncBasePriorityPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeCreatePagefilePrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeBackupPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeRestorePrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeShutdownPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeDebugPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeSystemEnvironmentPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeChangeNotifyPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeRemoteShutdownPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeUndockPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeManageVolumePrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeImpersonatePrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeCreateGlobalPrivilege 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: 33 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: 34 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: 35 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: 36 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe Token: SeIncreaseQuotaPrivilege 368 Realtek Audio Manager.exe Token: SeSecurityPrivilege 368 Realtek Audio Manager.exe Token: SeTakeOwnershipPrivilege 368 Realtek Audio Manager.exe Token: SeLoadDriverPrivilege 368 Realtek Audio Manager.exe Token: SeSystemProfilePrivilege 368 Realtek Audio Manager.exe Token: SeSystemtimePrivilege 368 Realtek Audio Manager.exe Token: SeProfSingleProcessPrivilege 368 Realtek Audio Manager.exe Token: SeIncBasePriorityPrivilege 368 Realtek Audio Manager.exe Token: SeCreatePagefilePrivilege 368 Realtek Audio Manager.exe Token: SeBackupPrivilege 368 Realtek Audio Manager.exe Token: SeRestorePrivilege 368 Realtek Audio Manager.exe Token: SeShutdownPrivilege 368 Realtek Audio Manager.exe Token: SeDebugPrivilege 368 Realtek Audio Manager.exe Token: SeSystemEnvironmentPrivilege 368 Realtek Audio Manager.exe Token: SeChangeNotifyPrivilege 368 Realtek Audio Manager.exe Token: SeRemoteShutdownPrivilege 368 Realtek Audio Manager.exe Token: SeUndockPrivilege 368 Realtek Audio Manager.exe Token: SeManageVolumePrivilege 368 Realtek Audio Manager.exe Token: SeImpersonatePrivilege 368 Realtek Audio Manager.exe Token: SeCreateGlobalPrivilege 368 Realtek Audio Manager.exe Token: 33 368 Realtek Audio Manager.exe Token: 34 368 Realtek Audio Manager.exe Token: 35 368 Realtek Audio Manager.exe Token: 36 368 Realtek Audio Manager.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 368 Realtek Audio Manager.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4248 wrote to memory of 368 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe 82 PID 4248 wrote to memory of 368 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe 82 PID 4248 wrote to memory of 368 4248 4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe"C:\Users\Admin\AppData\Local\Temp\4f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4248 -
C:\Users\Admin\AppData\Local\Temp\DCSCMIN\Realtek Audio Manager.exe"C:\Users\Admin\AppData\Local\Temp\DCSCMIN\Realtek Audio Manager.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:368
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
658KB
MD55a85fd1683296db08ee44b7753884fe0
SHA152507f56324779b590e74aa288181016c1e1c7d0
SHA2564f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88
SHA51238dce9afca9a4edefcbce8952b65086576933287795c1311c8eda266c4ead34ad3762a4151735630739daab2162021f1664c741c93c8773d35e7b03d7ce0bbab
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Filesize
658KB
MD55a85fd1683296db08ee44b7753884fe0
SHA152507f56324779b590e74aa288181016c1e1c7d0
SHA2564f01a2cc6b192642413b92c2e4a476b91d91cf5cfa862fbb9a9c17496aed3f88
SHA51238dce9afca9a4edefcbce8952b65086576933287795c1311c8eda266c4ead34ad3762a4151735630739daab2162021f1664c741c93c8773d35e7b03d7ce0bbab