Analysis
- max time kernel
148s - max time network
146s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
06/08/2026, 02:42
Behavioral task
behavioral1
Sample
skuld.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
skuld.exe
Resource
win11ltsc2024-20260709-en
General
- Target skuld.exe
- Size 15.3MB
- Sample260806-c678asfd78
- SHA256 a48d13c8760ba533fef095ce3c303b81662f684809138fbaa4310edea6d4c260
- MD5 b71e222e7daf72a0bcddc27dcc9cb7f5
- SHA1 b0fc85f0d14f02a15ec0d829bf23baea85ead7d4
- SHA512 5f9b282b0e84e443ce90f2c1ff13224a4b9a1e60f100d60e0c974a36851a99fd2950eaa381dec3ba92d51ab955d5d52109feaf290e2d62c72d1cd3011dc2a48e
- SSDEEP 196608:15+4UVyZ6jSvZ5n9pTY3kUGERodlqd0mdmM5WIOC:1rUe59OGGodlVlMcIO
- TLSH T174F68D43ECB556E9C099917AC6668612BB753C884B3163D36B60FB346F33BD0AE78740
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Detects SkuldStealer 1 IoCs
resource yara_rule behavioral2/files/0x000c00000001c5fa-4.dat family_skuld - Executes dropped EXE 4 IoCs
pid Process 3656 SecurityHealthSystray.exe 3248 SecurityHealthSystray.exe 4560 SecurityHealthWatcher.exe 5608 SecurityHealthWatcher.exe - Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4046655672-1449839301-2197395821-1000\Software\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe" skuld.exe Set value (str) \REGISTRY\USER\S-1-5-21-4046655672-1449839301-2197395821-1000\Software\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Watcher Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthWatcher.exe" skuld.exe - Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
flow ioc 1 discord.com 15 discord.com - Looks up external IP address via web service 1 TTPs 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 1 api.ipify.org 1 ip-api.com 6 api.ipify.org 9 api.ipify.org - Event Triggered Execution: Netsh Helper DLL 1 TTPs 18 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 opened \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key value enumerated \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key value enumerated \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key opened \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key value enumerated \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key value enumerated \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key value enumerated \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key opened \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key opened \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key opened \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key opened \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key value enumerated \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe Key queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh netsh.exe - System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 6 IoCs
Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.
pid Process 2420 netsh.exe 3740 netsh.exe 5176 netsh.exe 3776 netsh.exe 4284 netsh.exe 4948 netsh.exe - Detects videocard installed 1 TTPs 6 IoCs
Uses WMIC.exe to determine videocard installed.
pid Process 6040 wmic.exe 2860 wmic.exe 2600 wmic.exe 2200 wmic.exe 5300 wmic.exe 4132 wmic.exe - GoLang User-Agent 2 IoCs
Uses default user-agent string defined by GoLang HTTP packages.
description flow ioc HTTP User-Agent header 11 Go-http-client/1.1 HTTP User-Agent header 14 Go-http-client/1.1 - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2232 wmic.exe 2232 wmic.exe 2232 wmic.exe 2232 wmic.exe 4648 wmic.exe 4648 wmic.exe 4648 wmic.exe 4648 wmic.exe 2620 wmic.exe 2620 wmic.exe 2620 wmic.exe 2620 wmic.exe 2860 wmic.exe 2860 wmic.exe 2860 wmic.exe 2860 wmic.exe 2164 wmic.exe 2164 wmic.exe 2164 wmic.exe 2164 wmic.exe 4692 wmic.exe 4692 wmic.exe 4692 wmic.exe 4692 wmic.exe 3164 wmic.exe 3164 wmic.exe 3164 wmic.exe 3164 wmic.exe 2600 wmic.exe 2600 wmic.exe 2600 wmic.exe 2600 wmic.exe 4248 wmic.exe 4248 wmic.exe 4248 wmic.exe 4248 wmic.exe 2552 wmic.exe 2552 wmic.exe 2552 wmic.exe 2552 wmic.exe 5440 wmic.exe 5440 wmic.exe 5440 wmic.exe 5440 wmic.exe 4224 wmic.exe 4224 wmic.exe 4224 wmic.exe 4224 wmic.exe 2200 wmic.exe 2200 wmic.exe 2200 wmic.exe 2200 wmic.exe 5088 wmic.exe 5088 wmic.exe 5088 wmic.exe 5088 wmic.exe 1996 wmic.exe 1996 wmic.exe 1996 wmic.exe 1996 wmic.exe 5672 wmic.exe 5672 wmic.exe 5672 wmic.exe 5672 wmic.exe - Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeDebugPrivilege 4844 skuld.exe Token: SeIncreaseQuotaPrivilege 2232 wmic.exe Token: SeSecurityPrivilege 2232 wmic.exe Token: SeTakeOwnershipPrivilege 2232 wmic.exe Token: SeLoadDriverPrivilege 2232 wmic.exe Token: SeSystemProfilePrivilege 2232 wmic.exe Token: SeSystemtimePrivilege 2232 wmic.exe Token: SeProfSingleProcessPrivilege 2232 wmic.exe Token: SeIncBasePriorityPrivilege 2232 wmic.exe Token: SeCreatePagefilePrivilege 2232 wmic.exe Token: SeBackupPrivilege 2232 wmic.exe Token: SeRestorePrivilege 2232 wmic.exe Token: SeShutdownPrivilege 2232 wmic.exe Token: SeDebugPrivilege 2232 wmic.exe Token: SeSystemEnvironmentPrivilege 2232 wmic.exe Token: SeRemoteShutdownPrivilege 2232 wmic.exe Token: SeUndockPrivilege 2232 wmic.exe Token: SeManageVolumePrivilege 2232 wmic.exe Token: 33 2232 wmic.exe Token: 34 2232 wmic.exe Token: 35 2232 wmic.exe Token: 36 2232 wmic.exe Token: SeIncreaseQuotaPrivilege 2232 wmic.exe Token: SeSecurityPrivilege 2232 wmic.exe Token: SeTakeOwnershipPrivilege 2232 wmic.exe Token: SeLoadDriverPrivilege 2232 wmic.exe Token: SeSystemProfilePrivilege 2232 wmic.exe Token: SeSystemtimePrivilege 2232 wmic.exe Token: SeProfSingleProcessPrivilege 2232 wmic.exe Token: SeIncBasePriorityPrivilege 2232 wmic.exe Token: SeCreatePagefilePrivilege 2232 wmic.exe Token: SeBackupPrivilege 2232 wmic.exe Token: SeRestorePrivilege 2232 wmic.exe Token: SeShutdownPrivilege 2232 wmic.exe Token: SeDebugPrivilege 2232 wmic.exe Token: SeSystemEnvironmentPrivilege 2232 wmic.exe Token: SeRemoteShutdownPrivilege 2232 wmic.exe Token: SeUndockPrivilege 2232 wmic.exe Token: SeManageVolumePrivilege 2232 wmic.exe Token: 33 2232 wmic.exe Token: 34 2232 wmic.exe Token: 35 2232 wmic.exe Token: 36 2232 wmic.exe Token: SeIncreaseQuotaPrivilege 4648 wmic.exe Token: SeSecurityPrivilege 4648 wmic.exe Token: SeTakeOwnershipPrivilege 4648 wmic.exe Token: SeLoadDriverPrivilege 4648 wmic.exe Token: SeSystemProfilePrivilege 4648 wmic.exe Token: SeSystemtimePrivilege 4648 wmic.exe Token: SeProfSingleProcessPrivilege 4648 wmic.exe Token: SeIncBasePriorityPrivilege 4648 wmic.exe Token: SeCreatePagefilePrivilege 4648 wmic.exe Token: SeBackupPrivilege 4648 wmic.exe Token: SeRestorePrivilege 4648 wmic.exe Token: SeShutdownPrivilege 4648 wmic.exe Token: SeDebugPrivilege 4648 wmic.exe Token: SeSystemEnvironmentPrivilege 4648 wmic.exe Token: SeRemoteShutdownPrivilege 4648 wmic.exe Token: SeUndockPrivilege 4648 wmic.exe Token: SeManageVolumePrivilege 4648 wmic.exe Token: 33 4648 wmic.exe Token: 34 4648 wmic.exe Token: 35 4648 wmic.exe Token: 36 4648 wmic.exe - Suspicious use of WriteProcessMemory 38 IoCs
description pid Process procid_target PID 4844 wrote to memory of 1740 4844 skuld.exe 91 PID 4844 wrote to memory of 2232 4844 skuld.exe 92 PID 4844 wrote to memory of 4648 4844 skuld.exe 93 PID 4844 wrote to memory of 2620 4844 skuld.exe 94 PID 4844 wrote to memory of 2860 4844 skuld.exe 95 PID 4844 wrote to memory of 3776 4844 skuld.exe 96 PID 4844 wrote to memory of 704 4844 skuld.exe 97 PID 4844 wrote to memory of 5004 4844 skuld.exe 98 PID 4844 wrote to memory of 3248 4844 skuld.exe 102 PID 3656 wrote to memory of 5548 3656 SecurityHealthSystray.exe 103 PID 3656 wrote to memory of 2164 3656 SecurityHealthSystray.exe 104 PID 3656 wrote to memory of 4692 3656 SecurityHealthSystray.exe 105 PID 3656 wrote to memory of 3164 3656 SecurityHealthSystray.exe 106 PID 3656 wrote to memory of 2600 3656 SecurityHealthSystray.exe 107 PID 3656 wrote to memory of 4284 3656 SecurityHealthSystray.exe 108 PID 4844 wrote to memory of 5608 4844 skuld.exe 110 PID 5608 wrote to memory of 2004 5608 SecurityHealthWatcher.exe 111 PID 4844 wrote to memory of 4248 4844 skuld.exe 112 PID 3656 wrote to memory of 2552 3656 SecurityHealthSystray.exe 114 PID 3656 wrote to memory of 5440 3656 SecurityHealthSystray.exe 115 PID 3656 wrote to memory of 4224 3656 SecurityHealthSystray.exe 116 PID 3656 wrote to memory of 2200 3656 SecurityHealthSystray.exe 117 PID 3656 wrote to memory of 4948 3656 SecurityHealthSystray.exe 118 PID 3656 wrote to memory of 5088 3656 SecurityHealthSystray.exe 119 PID 3656 wrote to memory of 1996 3656 SecurityHealthSystray.exe 120 PID 3656 wrote to memory of 5672 3656 SecurityHealthSystray.exe 121 PID 3656 wrote to memory of 5300 3656 SecurityHealthSystray.exe 122 PID 3656 wrote to memory of 2420 3656 SecurityHealthSystray.exe 123 PID 3656 wrote to memory of 4344 3656 SecurityHealthSystray.exe 124 PID 3656 wrote to memory of 2916 3656 SecurityHealthSystray.exe 125 PID 3656 wrote to memory of 4116 3656 SecurityHealthSystray.exe 126 PID 3656 wrote to memory of 4132 3656 SecurityHealthSystray.exe 127 PID 3656 wrote to memory of 3740 3656 SecurityHealthSystray.exe 128 PID 3656 wrote to memory of 6032 3656 SecurityHealthSystray.exe 129 PID 3656 wrote to memory of 828 3656 SecurityHealthSystray.exe 130 PID 3656 wrote to memory of 5960 3656 SecurityHealthSystray.exe 131 PID 3656 wrote to memory of 6040 3656 SecurityHealthSystray.exe 132 PID 3656 wrote to memory of 5176 3656 SecurityHealthSystray.exe 133 - Views/modifies file attributes 1 TTPs 5 IoCs
pid Process 1740 attrib.exe 704 attrib.exe 5004 attrib.exe 5548 attrib.exe 2004 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\skuld.exe"C:\Users\Admin\AppData\Local\Temp\skuld.exe"1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4844 -
C:\Windows\system32\attrib.exeattrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe2⤵
- Views/modifies file attributes
PID:1740
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C:\Windows\System32\Wbem\wmic.exewmic csproduct get UUID2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2232
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C:\Windows\System32\Wbem\wmic.exewmic os get Caption2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4648
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C:\Windows\System32\Wbem\wmic.exewmic cpu get Name2⤵
- Suspicious behavior: EnumeratesProcesses
PID:2620
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C:\Windows\System32\Wbem\wmic.exewmic path win32_VideoController get name2⤵
- Detects videocard installed
- Suspicious behavior: EnumeratesProcesses
PID:2860
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C:\Windows\system32\netsh.exenetsh wlan show profiles2⤵
- Event Triggered Execution: Netsh Helper DLL
- System Network Configuration Discovery: Wi-Fi Discovery
PID:3776
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C:\Windows\system32\attrib.exeattrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe2⤵
- Views/modifies file attributes
PID:704
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C:\Windows\system32\attrib.exeattrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthWatcher.exe2⤵
- Views/modifies file attributes
PID:5004
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C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exeC:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe2⤵
- Executes dropped EXE
PID:3248
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C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthWatcher.exeC:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthWatcher.exe2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:5608 -
C:\Windows\system32\attrib.exeattrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthWatcher.exe3⤵
- Views/modifies file attributes
PID:2004
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C:\Windows\System32\Wbem\wmic.exewmic csproduct get UUID2⤵
- Suspicious behavior: EnumeratesProcesses
PID:4248
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C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exeC:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3656 -
C:\Windows\system32\attrib.exeattrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe2⤵
- Views/modifies file attributes
PID:5548
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C:\Windows\System32\Wbem\wmic.exewmic csproduct get UUID2⤵
- Suspicious behavior: EnumeratesProcesses
PID:2164
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C:\Windows\System32\Wbem\wmic.exewmic os get Caption2⤵
- Suspicious behavior: EnumeratesProcesses
PID:4692
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C:\Windows\System32\Wbem\wmic.exewmic cpu get Name2⤵
- Suspicious behavior: EnumeratesProcesses
PID:3164
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C:\Windows\System32\Wbem\wmic.exewmic path win32_VideoController get name2⤵
- Detects videocard installed
- Suspicious behavior: EnumeratesProcesses
PID:2600
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C:\Windows\system32\netsh.exenetsh wlan show profiles2⤵
- Event Triggered Execution: Netsh Helper DLL
- System Network Configuration Discovery: Wi-Fi Discovery
PID:4284
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C:\Windows\System32\Wbem\wmic.exewmic csproduct get UUID2⤵
- Suspicious behavior: EnumeratesProcesses
PID:2552
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C:\Windows\System32\Wbem\wmic.exewmic os get Caption2⤵
- Suspicious behavior: EnumeratesProcesses
PID:5440
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C:\Windows\System32\Wbem\wmic.exewmic cpu get Name2⤵
- Suspicious behavior: EnumeratesProcesses
PID:4224
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C:\Windows\System32\Wbem\wmic.exewmic path win32_VideoController get name2⤵
- Detects videocard installed
- Suspicious behavior: EnumeratesProcesses
PID:2200
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C:\Windows\system32\netsh.exenetsh wlan show profiles2⤵
- Event Triggered Execution: Netsh Helper DLL
- System Network Configuration Discovery: Wi-Fi Discovery
PID:4948
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C:\Windows\System32\Wbem\wmic.exewmic csproduct get UUID2⤵
- Suspicious behavior: EnumeratesProcesses
PID:5088
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C:\Windows\System32\Wbem\wmic.exewmic os get Caption2⤵
- Suspicious behavior: EnumeratesProcesses
PID:1996
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C:\Windows\System32\Wbem\wmic.exewmic cpu get Name2⤵
- Suspicious behavior: EnumeratesProcesses
PID:5672
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C:\Windows\System32\Wbem\wmic.exewmic path win32_VideoController get name2⤵
- Detects videocard installed
PID:5300
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C:\Windows\system32\netsh.exenetsh wlan show profiles2⤵
- Event Triggered Execution: Netsh Helper DLL
- System Network Configuration Discovery: Wi-Fi Discovery
PID:2420
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C:\Windows\System32\Wbem\wmic.exewmic csproduct get UUID2⤵PID:4344
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C:\Windows\System32\Wbem\wmic.exewmic os get Caption2⤵PID:2916
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C:\Windows\System32\Wbem\wmic.exewmic cpu get Name2⤵PID:4116
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C:\Windows\System32\Wbem\wmic.exewmic path win32_VideoController get name2⤵
- Detects videocard installed
PID:4132
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C:\Windows\system32\netsh.exenetsh wlan show profiles2⤵
- Event Triggered Execution: Netsh Helper DLL
- System Network Configuration Discovery: Wi-Fi Discovery
PID:3740
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C:\Windows\System32\Wbem\wmic.exewmic csproduct get UUID2⤵PID:6032
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C:\Windows\System32\Wbem\wmic.exewmic os get Caption2⤵PID:828
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C:\Windows\System32\Wbem\wmic.exewmic cpu get Name2⤵PID:5960
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C:\Windows\System32\Wbem\wmic.exewmic path win32_VideoController get name2⤵
- Detects videocard installed
PID:6040
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C:\Windows\system32\netsh.exenetsh wlan show profiles2⤵
- Event Triggered Execution: Netsh Helper DLL
- System Network Configuration Discovery: Wi-Fi Discovery
PID:5176
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C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthWatcher.exeC:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthWatcher.exe1⤵
- Executes dropped EXE
PID:4560
Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1Netsh Helper DLL
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1Netsh Helper DLL
1Defense Evasion
Hide Artifacts
1Hidden Files and Directories
1Modify Registry
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
- Size 15.3MB
- SHA256 a48d13c8760ba533fef095ce3c303b81662f684809138fbaa4310edea6d4c260
- MD5 b71e222e7daf72a0bcddc27dcc9cb7f5
- SHA1 b0fc85f0d14f02a15ec0d829bf23baea85ead7d4
- SHA512 5f9b282b0e84e443ce90f2c1ff13224a4b9a1e60f100d60e0c974a36851a99fd2950eaa381dec3ba92d51ab955d5d52109feaf290e2d62c72d1cd3011dc2a48e
- SSDEEP 196608:15+4UVyZ6jSvZ5n9pTY3kUGERodlqd0mdmM5WIOC:1rUe59OGGodlVlMcIO
- TLSH T174F68D43ECB556E9C099917AC6668612BB753C884B3163D36B60FB346F33BD0AE78740
- MD5 SHA1 SHA512 SSDEEP TLSH