Analysis
- max time kernel
150s - max time network
149s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260513-en - resource tags
arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows - submitted
22/05/2026, 22:28
Static task
static1
Behavioral task
behavioral1
Sample
tmp8366zys1.exe
Resource
win10ltsc2021-20260513-en
Behavioral task
behavioral2
Sample
tmp8366zys1.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral3
Sample
tmp8366zys1.exe
Resource
win11-20260513-en
General
- Target tmp8366zys1.exe
- Size 4.1MB
- Sample260522-2ds1cafw2k
- SHA256 d942ca60434c6717a0d8904821d7ab5d47b2d4c3ba929e05060cecd00f6a4df7
- MD5 8089c8283105ecda0250a13de053db3b
- SHA1 b3a60904cfd79254e962f7e5502d6a11c2972146
- SHA512 f68d7e95dffc6124dafa8d7f032ed691b792fefc0dfc531dfb893a4acd8653c42302aae418f055c071504cb31727efd953178a528f234a585bbcba9c01b6e07e
- SSDEEP 98304:KmmecDLZHe/6iT8mjNYFzPiVTrKad2FHPt/RsmVcmz4ZxoMk:KLD1H5xmM6ld2FRRimVMk
- TLSH T1A1163336FDA88276C533D5B444B4D2A4EE7A19208975325B3325118A8272FDCA7FC32F
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Glupteba payload 21 IoCs
resource yara_rule behavioral1/memory/1988-2-0x0000000002EF0000-0x0000000003766000-memory.dmp family_glupteba behavioral1/memory/1988-4-0x0000000002EF0000-0x0000000003766000-memory.dmp family_glupteba behavioral1/memory/1988-3-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3488-11-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/1980-15-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-23-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3160-26-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4988-28-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/5068-30-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-31-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-32-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-33-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-34-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-35-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-36-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-37-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-38-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-39-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-40-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-41-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4660-42-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba - Windows security bypass 2 TTPs 7 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\csrss = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\windefender.exe = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\System32\drivers = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\csrss.exe = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\windefender.exe = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\tmp8366zys1.exe = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\rss = "0" tmp8366zys1.exe - Modifies Windows Firewall 2 TTPs 1 IoCs
pid Process 3068 netsh.exe - Executes dropped EXE 6 IoCs
pid Process 4660 csrss.exe 1980 csrss.exe 3160 csrss.exe 1104 injector.exe 4988 csrss.exe 5068 csrss.exe - Windows security modification 2 TTPs 7 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\rss = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\csrss = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\windefender.exe = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\System32\drivers = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\csrss.exe = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\windefender.exe = "0" tmp8366zys1.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\tmp8366zys1.exe = "0" tmp8366zys1.exe - Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2058276091-3280583803-376660292-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" tmp8366zys1.exe Set value (str) \REGISTRY\USER\S-1-5-21-2058276091-3280583803-376660292-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" csrss.exe - Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Manipulates WinMonFS driver. 1 IoCs
Roottkits write to WinMonFS to hide directories/files from being detected.
description ioc Process File opened for modification \??\WinMonFS csrss.exe - Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs
Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.
description ioc Process File opened (read-only) \??\VBoxMiniRdrDN tmp8366zys1.exe - Drops file in Windows directory 2 IoCs
description ioc Process File opened for modification C:\Windows\rss tmp8366zys1.exe File created C:\Windows\rss\csrss.exe tmp8366zys1.exe - Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 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 queried \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 - Program crash 5 IoCs
pid pid_target Process procid_target 924 3488 WerFault.exe 86 652 1980 WerFault.exe 96 4124 3160 WerFault.exe 97 3312 4988 WerFault.exe 113 3216 5068 WerFault.exe 116 - System Location Discovery: System Language Discovery 1 TTPs 7 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language tmp8366zys1.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language tmp8366zys1.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language csrss.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language csrss.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language csrss.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language csrss.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language csrss.exe - Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1780 schtasks.exe 3964 schtasks.exe - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1988 tmp8366zys1.exe 1988 tmp8366zys1.exe 3488 tmp8366zys1.exe 3488 tmp8366zys1.exe 3488 tmp8366zys1.exe 3488 tmp8366zys1.exe 3488 tmp8366zys1.exe 3488 tmp8366zys1.exe 3488 tmp8366zys1.exe 3488 tmp8366zys1.exe 3488 tmp8366zys1.exe 3488 tmp8366zys1.exe 1980 csrss.exe 1980 csrss.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 4988 csrss.exe 4988 csrss.exe 4660 csrss.exe 4660 csrss.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 4660 csrss.exe 4660 csrss.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe 1104 injector.exe - Suspicious use of AdjustPrivilegeToken 7 IoCs
description pid Process Token: SeDebugPrivilege 1988 tmp8366zys1.exe Token: SeImpersonatePrivilege 1988 tmp8366zys1.exe Token: SeDebugPrivilege 1980 csrss.exe Token: SeImpersonatePrivilege 1980 csrss.exe Token: SeSystemEnvironmentPrivilege 4660 csrss.exe Token: SeDebugPrivilege 4988 csrss.exe Token: SeImpersonatePrivilege 4988 csrss.exe - Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 3488 wrote to memory of 4448 3488 tmp8366zys1.exe 87 PID 4448 wrote to memory of 3068 4448 cmd.exe 89 PID 3488 wrote to memory of 4660 3488 tmp8366zys1.exe 90 PID 4660 wrote to memory of 1104 4660 csrss.exe 111 - Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp8366zys1.exe"C:\Users\Admin\AppData\Local\Temp\tmp8366zys1.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1988 -
C:\Users\Admin\AppData\Local\Temp\tmp8366zys1.exe"C:\Users\Admin\AppData\Local\Temp\tmp8366zys1.exe"2⤵
- Windows security bypass
- Windows security modification
- Adds Run key to start application
- Checks for VirtualBox DLLs, possible anti-VM trick
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3488 -
C:\Windows\system32\cmd.exeC:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"3⤵
- Suspicious use of WriteProcessMemory
PID:4448 -
C:\Windows\system32\netsh.exenetsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes4⤵
- Modifies Windows Firewall
- Event Triggered Execution: Netsh Helper DLL
PID:3068
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C:\Windows\rss\csrss.exeC:\Windows\rss\csrss.exe3⤵
- Executes dropped EXE
- Adds Run key to start application
- Manipulates WinMonFS driver.
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4660 -
C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F4⤵
- Scheduled Task/Job: Scheduled Task
PID:1780
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C:\Windows\SYSTEM32\schtasks.exeschtasks /delete /tn ScheduledUpdate /f4⤵PID:2472
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C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exeC:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe taskmgr.exe C:\Users\Admin\AppData\Local\Temp\csrss\injector\NtQuerySystemInformationHook.dll4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1104
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C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F4⤵
- Scheduled Task/Job: Scheduled Task
PID:3964
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3488 -s 7923⤵
- Program crash
PID:924
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3488 -ip 34881⤵PID:3276
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C:\Windows\rss\csrss.exe"C:\Windows\rss\csrss.exe"1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1980 -
C:\Windows\rss\csrss.exe"C:\Windows\rss\csrss.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3160 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 8283⤵
- Program crash
PID:4124
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 7322⤵
- Program crash
PID:652
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 232 -p 1980 -ip 19801⤵PID:1668
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C:\Windows\rss\csrss.exeC:\Windows\rss\csrss.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4988 -
C:\Windows\rss\csrss.exe"C:\Windows\rss\csrss.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:5068 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 5068 -s 8363⤵
- Program crash
PID:3216
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4988 -s 7642⤵
- Program crash
PID:3312
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 3160 -ip 31601⤵PID:4504
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4988 -ip 49881⤵PID:3424
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 5068 -ip 50681⤵PID:3828
Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Netsh Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Netsh Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Impair Defenses
3Disable or Modify System Firewall
1Disable or Modify Tools
2Modify Registry
3Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
- Size 281KB
- SHA256 5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1
- MD5 d98e33b66343e7c96158444127a117f6
- SHA1 bb716c5509a2bf345c6c1152f6e3e1452d39d50d
- SHA512 705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5
- SSDEEP 3072:qbHszDaOJ8u2HHFIWr6e29kOnK7qFQ8wMii5I7kGvNjzMuszHshoY46bEydJ+dK9:SA3IlIA6e29vngqS8wMmuooh8z+8F
- TLSH T17B546C5AB2A918F8ED77823CC8525516F672B8160730D6EF03A447672F276E09D3FB21
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Windows\rss\csrss.exe
- Size 4.1MB
- SHA256 d942ca60434c6717a0d8904821d7ab5d47b2d4c3ba929e05060cecd00f6a4df7
- MD5 8089c8283105ecda0250a13de053db3b
- SHA1 b3a60904cfd79254e962f7e5502d6a11c2972146
- SHA512 f68d7e95dffc6124dafa8d7f032ed691b792fefc0dfc531dfb893a4acd8653c42302aae418f055c071504cb31727efd953178a528f234a585bbcba9c01b6e07e
- SSDEEP 98304:KmmecDLZHe/6iT8mjNYFzPiVTrKad2FHPt/RsmVcmz4ZxoMk:KLD1H5xmM6ld2FRRimVMk
- TLSH T1A1163336FDA88276C533D5B444B4D2A4EE7A19208975325B3325118A8272FDCA7FC32F
- MD5 SHA1 SHA512 SSDEEP TLSH