Analysis
- max time kernel
149s - max time network
153s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
02/10/2026, 16:48
Behavioral task
behavioral1
Sample
NursultanCrack.exe
Resource
win10v2004-20260911-en
Behavioral task
behavioral2
Sample
NursultanCrack.exe
Resource
win11ltsc2024-20260911-en
General
- Target NursultanCrack.exe
- Size 62KB
- Sample261002-vbkgvszamc
- SHA256 62f03630b7e6de136e5408a1eb7bf2c4f113be620eaf8299e7193130daba3edf
- MD5 e839e50d03676cdac86fc6a580412af1
- SHA1 48af7b5ef1e773fe9966c6099f5b4ea594753b79
- SHA512 ac62e0d0d6297364bad2093b86beae02ebab0b48b05f116b7d8209e2723c495bea9a9b8d09c3383e64481be9064009f9195873cdb3fc414c8101ba0271ea1d5b
- SSDEEP 1536:OGBnvDqn92gkSxrAW7fabjk+oF8/hwldc1+:NBEkSxr/7fabjBoFog
- TLSH T136532B00BBF9812AF2BE5F789DF221814AFAF1177903D68D5DD400A51A22FD58A416FE
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Extracted
-
sheetrat
-
1.0
-
skynet8.duckdns.org:25565
-
185.167.61.79:25565
Signatures
- Async RAT payload 1 IoCs
resource yara_rule behavioral2/files/0x000d00000001c4d2-54.dat family_asyncrat - Detects Sheetrat obfuscated V1.8 and higher 2 IoCs
Sheetrat aka NonEuclid RAT is a trojan written in C#.
resource yara_rule behavioral2/files/0x000e00000001c4c9-6.dat family_sheetrat_v4 behavioral2/memory/4604-14-0x0000000000F20000-0x0000000000F80000-memory.dmp family_sheetrat_v4 - 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:\\Windows\\System32\\RuntiimeBroker.exe" stlnew.exe - Downloads MZ/PE file 1 IoCs
flow pid Process 7 4168 NursultanCrack.exe - Executes dropped EXE 8 IoCs
pid Process 4604 stlnew.exe 4492 NursultanCrack.exe 1120 NursultanCrack.exe 620 RuntiimeBroker.exe 4780 RuntiimeBroker.exe 1504 IExplorer.exe 972 RuntiimeBroker.exe 4776 RuntiimeBroker.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4154726816-2055034831-2297277433-1000\Software\Microsoft\Windows\CurrentVersion\Run\NursultanCrack = "\"C:\\Users\\Admin\\AppData\\Roaming\\NursultanCrack.exe\"" NursultanCrack.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 raw.githubusercontent.com 7 raw.githubusercontent.com - Drops file in System32 directory 7 IoCs
description ioc Process File opened for modification C:\Windows\System32\RuntiimeBroker.exe RuntiimeBroker.exe File created C:\Windows\System32\RuntiimeBroker.exe stlnew.exe File opened for modification C:\Windows\System32\RuntiimeBroker.exe stlnew.exe File opened for modification C:\Windows\System32\RuntiimeBroker.exe RuntiimeBroker.exe File opened for modification C:\Windows\System32\RuntiimeBroker.exe RuntiimeBroker.exe File opened for modification C:\Windows\System32\RuntiimeBroker.exe IExplorer.exe File opened for modification C:\Windows\System32\RuntiimeBroker.exe RuntiimeBroker.exe - Drops file in Windows directory 7 IoCs
description ioc Process File opened for modification C:\Windows\Web\IExplorer.exe RuntiimeBroker.exe File created C:\Windows\Web\IExplorer.exe stlnew.exe File opened for modification C:\Windows\Web\IExplorer.exe stlnew.exe File opened for modification C:\Windows\Web\IExplorer.exe RuntiimeBroker.exe File opened for modification C:\Windows\Web\IExplorer.exe RuntiimeBroker.exe File opened for modification C:\Windows\Web\IExplorer.exe IExplorer.exe File opened for modification C:\Windows\Web\IExplorer.exe RuntiimeBroker.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 4 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
pid Process 4896 cmd.exe 2764 cmd.exe 3296 cmd.exe 4280 cmd.exe - Program crash 2 IoCs
pid pid_target Process procid_target 5004 4492 WerFault.exe 108 5040 1120 WerFault.exe 113 - Reads the TCP/IP host and domain name from the registry 1 TTPs 14 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain RuntiimeBroker.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname RuntiimeBroker.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname RuntiimeBroker.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain RuntiimeBroker.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain NursultanCrack.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname stlnew.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname RuntiimeBroker.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain RuntiimeBroker.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname RuntiimeBroker.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname IExplorer.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain IExplorer.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain RuntiimeBroker.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname NursultanCrack.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain stlnew.exe - 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 timeout.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language NursultanCrack.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language NursultanCrack.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language NursultanCrack.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe - Delays execution with timeout.exe 1 IoCs
pid Process 4712 timeout.exe - Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 368 schtasks.exe 5816 schtasks.exe 5216 schtasks.exe - Suspicious behavior: EnumeratesProcesses 32 IoCs
pid Process 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe 4168 NursultanCrack.exe - Suspicious use of AdjustPrivilegeToken 8 IoCs
description pid Process Token: SeDebugPrivilege 4168 NursultanCrack.exe Token: SeDebugPrivilege 4604 stlnew.exe Token: SeDebugPrivilege 620 RuntiimeBroker.exe Token: SeDebugPrivilege 4780 RuntiimeBroker.exe Token: SeIncBasePriorityPrivilege 620 RuntiimeBroker.exe Token: SeDebugPrivilege 1504 IExplorer.exe Token: SeDebugPrivilege 972 RuntiimeBroker.exe Token: SeDebugPrivilege 4776 RuntiimeBroker.exe - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 4168 wrote to memory of 4604 4168 NursultanCrack.exe 89 PID 4604 wrote to memory of 2872 4604 stlnew.exe 92 PID 4604 wrote to memory of 2764 4604 stlnew.exe 93 PID 2764 wrote to memory of 368 2764 cmd.exe 96 PID 4168 wrote to memory of 3296 4168 NursultanCrack.exe 97 PID 4168 wrote to memory of 4280 4168 NursultanCrack.exe 99 PID 4604 wrote to memory of 4896 4604 stlnew.exe 101 PID 3296 wrote to memory of 5816 3296 cmd.exe 103 PID 4896 wrote to memory of 5216 4896 cmd.exe 106 PID 4280 wrote to memory of 4712 4280 cmd.exe 107 PID 4280 wrote to memory of 1120 4280 cmd.exe 113 PID 4604 wrote to memory of 4780 4604 stlnew.exe 117 - 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\NursultanCrack.exe"C:\Users\Admin\AppData\Local\Temp\NursultanCrack.exe"1⤵
- Downloads MZ/PE file
- Adds Run key to start application
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4168 -
C:\Users\Admin\AppData\Local\Temp\stlnew.exe"C:\Users\Admin\AppData\Local\Temp\stlnew.exe"2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4604 -
C:\Windows\SYSTEM32\CMD.exe"CMD" netsh advfirewall firewall add rule name="ZQb yoUFybrIy^" dir=in action=allow program="C:\Windows\System32\RuntiimeBroker.exe" enable=yes & exit3⤵PID:2872
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C:\Windows\SYSTEM32\cmd.exe"cmd" /c schtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\WAppCrashNvTew" /tr "C:\Windows\System32\RuntiimeBroker.exe" /RL HIGHEST & exit3⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:2764 -
C:\Windows\system32\schtasks.exeschtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\WAppCrashNvTew" /tr "C:\Windows\System32\RuntiimeBroker.exe" /RL HIGHEST4⤵
- Scheduled Task/Job: Scheduled Task
PID:368
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C:\Windows\SYSTEM32\cmd.exe"cmd" /c schtasks /create /f /sc minute /mo 30 /tn "Microsoft\MachineCore" /tr "C:\Windows\Web\IExplorer.exe" /RL HIGHEST & exit3⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:4896 -
C:\Windows\system32\schtasks.exeschtasks /create /f /sc minute /mo 30 /tn "Microsoft\MachineCore" /tr "C:\Windows\Web\IExplorer.exe" /RL HIGHEST4⤵
- Scheduled Task/Job: Scheduled Task
PID:5216
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C:\Windows\System32\RuntiimeBroker.exe"C:\Windows\System32\RuntiimeBroker.exe"3⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
PID:4780
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "NursultanCrack" /tr '"C:\Users\Admin\AppData\Roaming\NursultanCrack.exe"' & exit2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3296 -
C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "NursultanCrack" /tr '"C:\Users\Admin\AppData\Roaming\NursultanCrack.exe"'3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:5816
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5395.tmp.bat""2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4280 -
C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:4712
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C:\Users\Admin\AppData\Roaming\NursultanCrack.exe"C:\Users\Admin\AppData\Roaming\NursultanCrack.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1120 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1120 -s 10044⤵
- Program crash
PID:5040
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C:\Users\Admin\AppData\Roaming\NursultanCrack.exe"C:\Users\Admin\AppData\Roaming\NursultanCrack.exe"1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4492 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4492 -s 9802⤵
- Program crash
PID:5004
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 4492 -ip 44921⤵PID:5796
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 1120 -ip 11201⤵PID:5592
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C:\Windows\System32\RuntiimeBroker.exeC:\Windows\System32\RuntiimeBroker.exe1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
PID:620
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C:\Windows\Web\IExplorer.exeC:\Windows\Web\IExplorer.exe1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
PID:1504
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C:\Windows\System32\RuntiimeBroker.exe"C:\Windows\System32\RuntiimeBroker.exe"1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
PID:972
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C:\Windows\System32\RuntiimeBroker.exe"C:\Windows\System32\RuntiimeBroker.exe"1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
PID:4776
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\Temp\stlnew.exe
- Size 359KB
- SHA256 323f65da48cbfb9c714a560a2323b5d55a7e44abe590b9f61acdf23dddbe1e4e
- MD5 0199f7e86a0bd16bda02660c052187d1
- SHA1 21dd8d22c48e3d5f5255923387c48d45abb41b6f
- SHA512 a31965f27eb8458d0545ede2fc237efa687a2050f5e05bc62c7b10d8da2c4abb31894f3bde081ecbc3aeaf0e9e830b8ff5f0c0ae5a21bde7d17f819ae8456a8c
- SSDEEP 6144:a6pCc2FbEJmRF0TOoN5AZMm2SFpwPbw64irGmJL3Jb88838xH40E3wdEYlm54I4:Xcc2/RWT4JAL3C89HAA5lm5X
- TLSH T11A74D6257FC58E10D995657EC2BE3A01C722B4F11102A387370AF7616E459EEEE2C3DA
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Temp\tmp5395.tmp.bat
- Size 158B
- SHA256 f8afd7f55e32370ba87f05a22e79570a3e14fd999f248e4b2a556d305e25841c
- MD5 ba51e864cad9dd988e00e7d3ba636244
- SHA1 b88267eccf7ff39ded46a25065e99715d3ac3e39
- SHA512 7e09e29085a4906e7e803df80c68b6aec8e2e543b8b1819be1cac503c8ab584d5c280d49014b756c2890458a4d74c8682d11195dc0e56987031c42c4c12c3a63
- TLSH T17AC08C82A1CAEA4EA909545312BA999C917AAD2A3E44BB009344401B6280898E4D9385
- MD5 SHA1 SHA512 TLSH
- Path C:\Users\Admin\AppData\Roaming\NursultanCrack.exe
- Size 62KB
- SHA256 62f03630b7e6de136e5408a1eb7bf2c4f113be620eaf8299e7193130daba3edf
- MD5 e839e50d03676cdac86fc6a580412af1
- SHA1 48af7b5ef1e773fe9966c6099f5b4ea594753b79
- SHA512 ac62e0d0d6297364bad2093b86beae02ebab0b48b05f116b7d8209e2723c495bea9a9b8d09c3383e64481be9064009f9195873cdb3fc414c8101ba0271ea1d5b
- SSDEEP 1536:OGBnvDqn92gkSxrAW7fabjk+oF8/hwldc1+:NBEkSxr/7fabjBoFog
- TLSH T136532B00BBF9812AF2BE5F789DF221814AFAF1177903D68D5DD400A51A22FD58A416FE
- MD5 SHA1 SHA512 SSDEEP TLSH